891 changed files with 19477 additions and 2374 deletions
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1,14 @@
+.DS_Store
+._.DS_Store
+**/.DS_Store
+**/._.DS_Store
+*.dSYM
+.vscode/
+just_code/**/*.txt
+temp/
+java/Main.java
+**/*.class
+**/package-lock.json
+**/package.json
+**/tsconfig.json
+node_modules/
--- a/CLAUDE.md
+++ b/CLAUDE.md
@ -1,21 +0,0 @@
-# LemonLimeTracker Project Guidelines
-
-## Core Rules & Constraints
- **NO Paid Entitlements**: NEVER add CloudKit, iCloud sync, App Groups, or Remote Notifications to Xcode Signing & Capabilities. Avoid build errors.
- **Persistence**: Use strictly local SwiftData. Do NOT use `NSPersistentCloudKitContainer`.
-
-## Architecture & Future Scope
- **Pattern**: Clean Architecture + MVVM.
- **Repository Pattern**: Strict separation of Data processing (SwiftData) and UI Views to allow easy future integration of CloudKit, Apple Watch, and Widgets.
- **Folder Structure**:
-  - `IOS/Models`: SwiftData Models (Task, Category, Goal, Log).
-  - `IOS/Repositories`: Data access layer (Protocols + Implementations).
-  - `IOS/ViewModels`: Business logic (`@Observable`).
-  - `IOS/Views`: SwiftUI Views.
-  - `IOS/Core`: App entry point, Constants, ActivityKit.
-  - `IOS/Resources`: Assets, Info.plist, Localizable.strings.
-
-## UI / Design System
- **Light Mode**: Green, Yellow, White.
- **Dark Mode**: Green, Yellow, Black.
- **Localization**: Default is Korean. Support English.
--- a/IOS/Assets.xcassets/AccentColor.colorset/Contents.json
+++ b/IOS/Assets.xcassets/AccentColor.colorset/Contents.json
@ -1,11 +0,0 @@
-{
-  "colors" : [
-    {
-      "idiom" : "universal"
-    }
-  ],
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}
--- a/IOS/Assets.xcassets/AppIcon.appiconset/Contents.json
+++ b/IOS/Assets.xcassets/AppIcon.appiconset/Contents.json
@ -1,35 +0,0 @@
-{
-  "images" : [
-    {
-      "idiom" : "universal",
-      "platform" : "ios",
-      "size" : "1024x1024"
-    },
-    {
-      "appearances" : [
-        {
-          "appearance" : "luminosity",
-          "value" : "dark"
-        }
-      ],
-      "idiom" : "universal",
-      "platform" : "ios",
-      "size" : "1024x1024"
-    },
-    {
-      "appearances" : [
-        {
-          "appearance" : "luminosity",
-          "value" : "tinted"
-        }
-      ],
-      "idiom" : "universal",
-      "platform" : "ios",
-      "size" : "1024x1024"
-    }
-  ],
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}
--- a/IOS/Assets.xcassets/Contents.json
+++ b/IOS/Assets.xcassets/Contents.json
@ -1,6 +0,0 @@
-{
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}
--- a/IOS/ContentView.swift
+++ b/IOS/ContentView.swift
@ -1,24 +0,0 @@
-//
-//  ContentView.swift
-//  LemonLimeTracker
-//
-//  Created by 송예찬 on 6/18/26.
-//
-
-import SwiftUI
-
-struct ContentView: View {
-    var body: some View {
-        VStack {
-            Image(systemName: "globe")
-                .imageScale(.large)
-                .foregroundStyle(.tint)
-            Text("Hello, world!")
-        }
-        .padding()
-    }
-}
-
-#Preview {
-    ContentView()
-}
--- a/IOS/Core/Theme.swift
+++ b/IOS/Core/Theme.swift
@ -1,21 +0,0 @@
-import SwiftUI
-import UIKit
-
-enum Theme {
-    static let green = Color(red: 0.18, green: 0.72, blue: 0.32)
-    static let yellow = Color(red: 0.96, green: 0.86, blue: 0.12)
-
-    static let background = Color(UIColor { traits in
-        traits.userInterfaceStyle == .dark ? .black : .white
-    })
-
-    static let surface = Color(UIColor { traits in
-        traits.userInterfaceStyle == .dark
-            ? UIColor(red: 0.10, green: 0.10, blue: 0.10, alpha: 1)
-            : UIColor(red: 0.97, green: 0.97, blue: 0.97, alpha: 1)
-    })
-
-    static let primaryText = Color(UIColor { traits in
-        traits.userInterfaceStyle == .dark ? .white : .black
-    })
-}
--- a/IOS/Core/TimerActivityAttributes.swift
+++ b/IOS/Core/TimerActivityAttributes.swift
@ -1,14 +0,0 @@
-#if os(iOS)
-import ActivityKit
-import Foundation
-
-struct TimerActivityAttributes: ActivityAttributes {
-    struct ContentState: Codable, Hashable {
-        var startDate: Date
-        var elapsedSeconds: Int
-    }
-
-    var taskName: String
-    var taskIcon: String
-}
-#endif
--- a/IOS/LemonLimeTrackerApp.swift
+++ b/IOS/LemonLimeTrackerApp.swift
@ -1,19 +0,0 @@
-//
-//  LemonLimeTrackerApp.swift
-//  LemonLimeTracker
-//
-//  Created by 송예찬 on 6/18/26.
-//
-
-import SwiftUI
-import SwiftData
-
-@main
-struct LemonLimeTrackerApp: App {
-    var body: some Scene {
-        WindowGroup {
-            RootView()
-        }
-        .modelContainer(SwiftDataService.shared.container)
-    }
-}
--- a/IOS/Models/Category.swift
+++ b/IOS/Models/Category.swift
@ -1,18 +0,0 @@
-import Foundation
-import SwiftData
-
-@Model
-final class Category {
-    @Attribute(.unique) var id: UUID
-    var name: String
-    var colorHex: String
-
-    @Relationship(deleteRule: .cascade, inverse: \TaskItem.category)
-    var tasks: [TaskItem] = []
-
-    init(id: UUID = UUID(), name: String, colorHex: String) {
-        self.id = id
-        self.name = name
-        self.colorHex = colorHex
-    }
-}
--- a/IOS/Models/Goal.swift
+++ b/IOS/Models/Goal.swift
@ -1,35 +0,0 @@
-import Foundation
-import SwiftData
-
-enum GoalFrequency: String, Codable {
-    case daily
-    case weekly
-    case monthly
-}
-
-@Model
-final class Goal {
-    @Attribute(.unique) var id: UUID
-    var targetType: String       // "count" or "duration"
-    var conditions: Double       // threshold value to meet the goal
-    var frequency: GoalFrequency
-
-    var task: TaskItem?
-    var category: Category?
-
-    init(
-        id: UUID = UUID(),
-        targetType: String,
-        conditions: Double,
-        frequency: GoalFrequency,
-        task: TaskItem? = nil,
-        category: Category? = nil
-    ) {
-        self.id = id
-        self.targetType = targetType
-        self.conditions = conditions
-        self.frequency = frequency
-        self.task = task
-        self.category = category
-    }
-}
--- a/IOS/Models/TaskItem.swift
+++ b/IOS/Models/TaskItem.swift
@ -1,28 +0,0 @@
-import Foundation
-import SwiftData
-
-enum TaskType: String, Codable {
-    case count
-    case time
-}
-
-@Model
-final class TaskItem {
-    @Attribute(.unique) var id: UUID
-    var name: String
-    var icon: String
-    var type: TaskType
-
-    var category: Category?
-
-    @Relationship(deleteRule: .cascade, inverse: \TaskLog.task)
-    var logs: [TaskLog] = []
-
-    init(id: UUID = UUID(), name: String, icon: String, type: TaskType, category: Category? = nil) {
-        self.id = id
-        self.name = name
-        self.icon = icon
-        self.type = type
-        self.category = category
-    }
-}
--- a/IOS/Models/TaskLog.swift
+++ b/IOS/Models/TaskLog.swift
@ -1,19 +0,0 @@
-import Foundation
-import SwiftData
-
-@Model
-final class TaskLog {
-    @Attribute(.unique) var id: UUID
-    var date: Date
-    var duration: TimeInterval
-    var count: Int
-
-    var task: TaskItem?
-
-    init(id: UUID = UUID(), date: Date = .now, duration: TimeInterval = 0, count: Int = 0) {
-        self.id = id
-        self.date = date
-        self.duration = duration
-        self.count = count
-    }
-}
--- a/IOS/Repositories/SwiftDataService.swift
+++ b/IOS/Repositories/SwiftDataService.swift
@ -1,24 +0,0 @@
-import Foundation
-import SwiftData
-
-@MainActor
-final class SwiftDataService {
-    static let shared = SwiftDataService()
-
-    let container: ModelContainer
-
-    private init() {
-        let schema = Schema([
-            Category.self,
-            TaskItem.self,
-            TaskLog.self,
-            Goal.self
-        ])
-        let config = ModelConfiguration(schema: schema, isStoredInMemoryOnly: false)
-        do {
-            container = try ModelContainer(for: schema, configurations: config)
-        } catch {
-            fatalError("SwiftData container failed to initialize: \(error)")
-        }
-    }
-}
--- a/IOS/Resources/en.lproj/Localizable.strings
+++ b/IOS/Resources/en.lproj/Localizable.strings
@ -1,50 +0,0 @@
-/* Tab Bar */
-"tab.dashboard" = "Dashboard";
-"tab.category" = "Category";
-"tab.tasks" = "Tasks";
-"tab.goals" = "Goals";
-"tab.settings" = "Settings";
-
-/* Task Tracker */
-"task.empty" = "No tasks added yet";
-"task.add" = "Add Task";
-"task.name" = "Name";
-"task.icon" = "Icon";
-"task.type" = "Type";
-"task.type.count" = "Count";
-"task.type.time" = "Time";
-"task.add.count" = "Add Count";
-"task.delete" = "Delete";
-"task.category" = "Category";
-"task.category.none" = "None";
-
-/* Buttons */
-"button.cancel" = "Cancel";
-"button.add" = "Add";
-
-/* Category */
-"category.empty" = "No categories yet";
-"category.add" = "Add Category";
-"category.name" = "Name";
-"category.color" = "Color";
-"category.delete" = "Delete";
-"category.task.count" = "tasks";
-
-/* Goals */
-"goal.empty" = "No goals yet";
-"goal.add" = "Add Goal";
-"goal.chart.title" = "Goal Progress";
-"goal.progress" = "Progress";
-"goal.target" = "Target";
-"goal.target.task" = "Task";
-"goal.target.category" = "Category";
-"goal.no.target" = "None";
-"goal.condition" = "Condition";
-"goal.condition.count" = "Count";
-"goal.condition.time" = "Time";
-"goal.frequency" = "Frequency";
-"goal.frequency.daily" = "Daily";
-"goal.frequency.weekly" = "Weekly";
-"goal.frequency.monthly" = "Monthly";
-"goal.threshold" = "Target Value";
-"goal.delete" = "Delete";
--- a/IOS/Resources/ko.lproj/Localizable.strings
+++ b/IOS/Resources/ko.lproj/Localizable.strings
@ -1,50 +0,0 @@
-/* Tab Bar */
-"tab.dashboard" = "대시보드";
-"tab.category" = "카테고리";
-"tab.tasks" = "작업 추적";
-"tab.goals" = "목표";
-"tab.settings" = "설정";
-
-/* Task Tracker */
-"task.empty" = "등록된 작업이 없습니다";
-"task.add" = "작업 추가";
-"task.name" = "이름";
-"task.icon" = "아이콘";
-"task.type" = "유형";
-"task.type.count" = "횟수";
-"task.type.time" = "시간";
-"task.add.count" = "횟수 추가";
-"task.delete" = "삭제";
-"task.category" = "카테고리";
-"task.category.none" = "없음";
-
-/* Buttons */
-"button.cancel" = "취소";
-"button.add" = "추가";
-
-/* Category */
-"category.empty" = "카테고리가 없습니다";
-"category.add" = "카테고리 추가";
-"category.name" = "이름";
-"category.color" = "색상";
-"category.delete" = "삭제";
-"category.task.count" = "작업";
-
-/* Goals */
-"goal.empty" = "등록된 목표가 없습니다";
-"goal.add" = "목표 추가";
-"goal.chart.title" = "목표 진행률";
-"goal.progress" = "진행률";
-"goal.target" = "대상";
-"goal.target.task" = "작업";
-"goal.target.category" = "카테고리";
-"goal.no.target" = "없음";
-"goal.condition" = "조건";
-"goal.condition.count" = "횟수";
-"goal.condition.time" = "시간";
-"goal.frequency" = "주기";
-"goal.frequency.daily" = "매일";
-"goal.frequency.weekly" = "매주";
-"goal.frequency.monthly" = "매월";
-"goal.threshold" = "목표값";
-"goal.delete" = "삭제";
--- a/IOS/ViewModels/CategoryViewModel.swift
+++ b/IOS/ViewModels/CategoryViewModel.swift
@ -1,45 +0,0 @@
-import Foundation
-import Observation
-import SwiftData
-
-@MainActor
-@Observable
-final class CategoryViewModel {
-    private(set) var categories: [Category] = []
-    private var context: ModelContext?
-
-    static let presetColors: [String] = [
-        "#2EB852", "#F5DC1F", "#4A90D9", "#F5A623",
-        "#9B59B6", "#E74C3C", "#1ABC9C", "#F39C12"
-    ]
-
-    func setup(context: ModelContext) {
-        self.context = context
-        fetchCategories()
-    }
-
-    func fetchCategories() {
-        guard let context else { return }
-        let descriptor = FetchDescriptor<Category>(sortBy: [SortDescriptor(\.name)])
-        categories = (try? context.fetch(descriptor)) ?? []
-    }
-
-    func addCategory(name: String, colorHex: String) {
-        guard let context else { return }
-        let category = Category(name: name, colorHex: colorHex)
-        context.insert(category)
-        try? context.save()
-        fetchCategories()
-    }
-
-    func deleteCategory(_ category: Category) {
-        guard let context else { return }
-        context.delete(category)
-        try? context.save()
-        fetchCategories()
-    }
-
-    func taskCount(for category: Category) -> Int {
-        category.tasks.count
-    }
-}
--- a/IOS/ViewModels/GoalViewModel.swift
+++ b/IOS/ViewModels/GoalViewModel.swift
@ -1,93 +0,0 @@
-import Foundation
-import Observation
-import SwiftData
-
-enum GoalTargetType: String, CaseIterable {
-    case task
-    case category
-}
-
-struct GoalProgress: Identifiable {
-    var id: UUID { goal.id }
-    let goal: Goal
-    let current: Double
-    let target: Double
-
-    var ratio: Double { target > 0 ? min(current / target, 1.0) : 0.0 }
-    var isCompleted: Bool { current >= target }
-
-    var displayName: String {
-        if let task = goal.task { return "\(task.icon) \(task.name)" }
-        if let category = goal.category { return category.name }
-        return "—"
-    }
-
-    var percentText: String { "\(Int(ratio * 100))%" }
-}
-
-@MainActor
-@Observable
-final class GoalViewModel {
-    private(set) var goals: [Goal] = []
-    private(set) var goalProgress: [GoalProgress] = []
-    private var context: ModelContext?
-
-    func setup(context: ModelContext) {
-        self.context = context
-        fetchGoals()
-    }
-
-    func fetchGoals() {
-        guard let context else { return }
-        let descriptor = FetchDescriptor<Goal>()
-        goals = (try? context.fetch(descriptor)) ?? []
-        computeProgress()
-    }
-
-    func addGoal(targetType: String, conditions: Double, frequency: GoalFrequency, task: TaskItem?, category: Category?) {
-        guard let context else { return }
-        let goal = Goal(targetType: targetType, conditions: conditions, frequency: frequency, task: task, category: category)
-        context.insert(goal)
-        try? context.save()
-        fetchGoals()
-    }
-
-    func deleteGoal(_ goal: Goal) {
-        guard let context else { return }
-        context.delete(goal)
-        try? context.save()
-        fetchGoals()
-    }
-
-    private func computeProgress() {
-        let now = Date.now
-        let cal = Calendar.current
-        goalProgress = goals.map { goal in
-            let logs = relevantLogs(for: goal, reference: now, calendar: cal)
-            let current: Double = goal.targetType == "count"
-                ? Double(logs.reduce(0) { $0 + $1.count })
-                : logs.reduce(0.0) { $0 + $1.duration }
-            return GoalProgress(goal: goal, current: current, target: goal.conditions)
-        }
-    }
-
-    private func relevantLogs(for goal: Goal, reference: Date, calendar: Calendar) -> [TaskLog] {
-        let allLogs: [TaskLog]
-        if let task = goal.task {
-            allLogs = task.logs
-        } else if let category = goal.category {
-            allLogs = category.tasks.flatMap { $0.logs }
-        } else {
-            return []
-        }
-        return allLogs.filter { inPeriod($0.date, frequency: goal.frequency, reference: reference, calendar: calendar) }
-    }
-
-    private func inPeriod(_ date: Date, frequency: GoalFrequency, reference: Date, calendar: Calendar) -> Bool {
-        switch frequency {
-        case .daily:   return calendar.isDate(date, inSameDayAs: reference)
-        case .weekly:  return calendar.isDate(date, equalTo: reference, toGranularity: .weekOfYear)
-        case .monthly: return calendar.isDate(date, equalTo: reference, toGranularity: .month)
-        }
-    }
-}
--- a/IOS/ViewModels/TaskViewModel.swift
+++ b/IOS/ViewModels/TaskViewModel.swift
@ -1,157 +0,0 @@
-import Foundation
-import Observation
-import SwiftData
-#if os(iOS)
-import ActivityKit
-#endif
-
-@MainActor
-@Observable
-final class TaskViewModel {
-    private(set) var tasks: [TaskItem] = []
-    private(set) var activeTimerStartDates: [UUID: Date] = [:]
-    private(set) var elapsedSeconds: [UUID: Int] = [:]
-
-    private var context: ModelContext?
-    private var timerTasks: [UUID: Task<Void, Never>] = [:]
-#if os(iOS)
-    private var liveActivities: [UUID: Activity<TimerActivityAttributes>] = [:]
-#endif
-
-    func setup(context: ModelContext) {
-        self.context = context
-        fetchTasks()
-    }
-
-    func fetchTasks() {
-        guard let context else { return }
-        let descriptor = FetchDescriptor<TaskItem>(sortBy: [SortDescriptor(\.name)])
-        tasks = (try? context.fetch(descriptor)) ?? []
-    }
-
-    func addTask(name: String, icon: String, type: TaskType, category: Category? = nil) {
-        guard let context else { return }
-        let item = TaskItem(name: name, icon: icon, type: type, category: category)
-        context.insert(item)
-        try? context.save()
-        fetchTasks()
-    }
-
-    func deleteTask(_ task: TaskItem) {
-        stopTimer(for: task)
-        guard let context else { return }
-        context.delete(task)
-        try? context.save()
-        fetchTasks()
-    }
-
-    func addCount(to task: TaskItem) {
-        guard let context else { return }
-        let log = TaskLog(date: .now, duration: 0, count: 1)
-        log.task = task
-        context.insert(log)
-        try? context.save()
-    }
-
-    func toggleTimer(for task: TaskItem) {
-        if activeTimerStartDates[task.id] != nil {
-            stopTimer(for: task)
-        } else {
-            startTimer(for: task)
-        }
-    }
-
-    func isTimerRunning(for taskID: UUID) -> Bool {
-        activeTimerStartDates[taskID] != nil
-    }
-
-    func formattedElapsed(for taskID: UUID) -> String {
-        let s = elapsedSeconds[taskID] ?? 0
-        let h = s / 3600
-        let m = (s % 3600) / 60
-        let sec = s % 60
-        return h > 0
-            ? String(format: "%d:%02d:%02d", h, m, sec)
-            : String(format: "%02d:%02d", m, sec)
-    }
-
-    func todayCount(for task: TaskItem) -> Int {
-        task.logs
-            .filter { Calendar.current.isDateInToday($0.date) }
-            .reduce(0) { $0 + $1.count }
-    }
-
-    // MARK: - Timer
-
-    private func startTimer(for task: TaskItem) {
-        let startDate = Date.now
-        activeTimerStartDates[task.id] = startDate
-        elapsedSeconds[task.id] = 0
-        startLiveActivity(for: task, startDate: startDate)
-
-        let taskID = task.id
-        timerTasks[taskID] = Task { [weak self] in
-            while !Task.isCancelled {
-                try? await Task.sleep(for: .seconds(1))
-                guard !Task.isCancelled, let self else { break }
-                let elapsed = Int(Date.now.timeIntervalSince(startDate))
-                self.elapsedSeconds[taskID] = elapsed
-                await self.updateLiveActivity(taskID: taskID, elapsed: elapsed, startDate: startDate)
-            }
-        }
-    }
-
-    private func stopTimer(for task: TaskItem) {
-        guard let startDate = activeTimerStartDates[task.id] else { return }
-
-        timerTasks[task.id]?.cancel()
-        timerTasks.removeValue(forKey: task.id)
-
-        let duration = Date.now.timeIntervalSince(startDate)
-        activeTimerStartDates.removeValue(forKey: task.id)
-        elapsedSeconds.removeValue(forKey: task.id)
-
-        endLiveActivity(for: task)
-
-        guard let context else { return }
-        let log = TaskLog(date: .now, duration: duration, count: 0)
-        log.task = task
-        context.insert(log)
-        try? context.save()
-    }
-
-    // MARK: - ActivityKit
-
-    private func startLiveActivity(for task: TaskItem, startDate: Date) {
-#if os(iOS)
-        guard ActivityAuthorizationInfo().areActivitiesEnabled else { return }
-        let attrs = TimerActivityAttributes(taskName: task.name, taskIcon: task.icon)
-        let state = TimerActivityAttributes.ContentState(startDate: startDate, elapsedSeconds: 0)
-        let content = ActivityContent(state: state, staleDate: nil)
-        do {
-            let activity = try Activity.request(attributes: attrs, content: content)
-            liveActivities[task.id] = activity
-        } catch {
-            // Live Activity unavailable (simulator, denied, or OS < 16.2)
-        }
-#endif
-    }
-
-    private func updateLiveActivity(taskID: UUID, elapsed: Int, startDate: Date) async {
-#if os(iOS)
-        guard let activity = liveActivities[taskID] else { return }
-        let state = TimerActivityAttributes.ContentState(startDate: startDate, elapsedSeconds: elapsed)
-        await activity.update(ActivityContent(state: state, staleDate: nil))
-#endif
-    }
-
-    private func endLiveActivity(for task: TaskItem) {
-#if os(iOS)
-        guard let activity = liveActivities[task.id] else { return }
-        liveActivities.removeValue(forKey: task.id)
-        Task {
-            await activity.end(nil, dismissalPolicy: .immediate)
-        }
-#endif
-    }
-}
--- a/IOS/Views/CategoryView.swift
+++ b/IOS/Views/CategoryView.swift
@ -1,177 +0,0 @@
-import SwiftUI
-import SwiftData
-
-struct CategoryView: View {
-    @Environment(\.modelContext) private var modelContext
-    @State private var viewModel = CategoryViewModel()
-    @State private var showAddSheet = false
-
-    var body: some View {
-        ZStack {
-            Theme.background.ignoresSafeArea()
-            Group {
-                if viewModel.categories.isEmpty {
-                    emptyState
-                } else {
-                    categoryList
-                }
-            }
-        }
-        .navigationTitle(String(localized: "tab.category"))
-        .toolbar {
-            ToolbarItem(placement: .navigationBarTrailing) {
-                Button { showAddSheet = true } label: {
-                    Image(systemName: "plus")
-                        .foregroundStyle(Theme.green)
-                }
-            }
-        }
-        .sheet(isPresented: $showAddSheet) {
-            AddCategorySheet { name, colorHex in
-                viewModel.addCategory(name: name, colorHex: colorHex)
-            }
-        }
-        .onAppear { viewModel.setup(context: modelContext) }
-    }
-
-    private var emptyState: some View {
-        VStack(spacing: 16) {
-            Image(systemName: "folder.badge.plus")
-                .font(.system(size: 56))
-                .foregroundStyle(Theme.green.opacity(0.6))
-            Text(String(localized: "category.empty"))
-                .foregroundStyle(Theme.primaryText.opacity(0.6))
-        }
-    }
-
-    private var categoryList: some View {
-        List {
-            ForEach(viewModel.categories) { category in
-                CategoryRow(category: category, taskCount: viewModel.taskCount(for: category))
-                    .listRowBackground(Theme.surface)
-                    .swipeActions(edge: .trailing, allowsFullSwipe: false) {
-                        Button(role: .destructive) {
-                            viewModel.deleteCategory(category)
-                        } label: {
-                            Label(String(localized: "category.delete"), systemImage: "trash")
-                        }
-                    }
-            }
-        }
-        .listStyle(.plain)
-        .scrollContentBackground(.hidden)
-    }
-}
-
-// MARK: - Category Row
-
-private struct CategoryRow: View {
-    let category: Category
-    let taskCount: Int
-
-    var body: some View {
-        HStack(spacing: 12) {
-            Circle()
-                .fill(Color(hex: category.colorHex))
-                .frame(width: 14, height: 14)
-
-            Text(category.name)
-                .font(.body)
-                .fontWeight(.medium)
-                .foregroundStyle(Theme.primaryText)
-
-            Spacer()
-
-            Text("\(taskCount) \(String(localized: "category.task.count"))")
-                .font(.caption)
-                .foregroundStyle(Theme.primaryText.opacity(0.5))
-                .padding(.horizontal, 8)
-                .padding(.vertical, 4)
-                .background(Theme.green.opacity(0.12), in: Capsule())
-        }
-        .padding(.vertical, 6)
-    }
-}
-
-// MARK: - Add Category Sheet
-
-private struct AddCategorySheet: View {
-    @Environment(\.dismiss) private var dismiss
-    @State private var name = ""
-    @State private var selectedColor = CategoryViewModel.presetColors[0]
-
-    let onAdd: (String, String) -> Void
-
-    var body: some View {
-        NavigationStack {
-            Form {
-                Section {
-                    TextField(String(localized: "category.name"), text: $name)
-                }
-
-                Section(String(localized: "category.color")) {
-                    LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: 4), spacing: 16) {
-                        ForEach(CategoryViewModel.presetColors, id: \.self) { colorHex in
-                            Circle()
-                                .fill(Color(hex: colorHex))
-                                .frame(width: 42, height: 42)
-                                .overlay(alignment: .center) {
-                                    if selectedColor == colorHex {
-                                        Image(systemName: "checkmark")
-                                            .font(.caption)
-                                            .fontWeight(.bold)
-                                            .foregroundStyle(.white)
-                                    }
-                                }
-                                .overlay(
-                                    Circle()
-                                        .strokeBorder(
-                                            selectedColor == colorHex ? Theme.primaryText.opacity(0.4) : Color.clear,
-                                            lineWidth: 2
-                                        )
-                                )
-                                .onTapGesture { selectedColor = colorHex }
-                        }
-                    }
-                    .padding(.vertical, 8)
-                }
-            }
-            .navigationTitle(String(localized: "category.add"))
-            .navigationBarTitleDisplayMode(.inline)
-            .toolbar {
-                ToolbarItem(placement: .cancellationAction) {
-                    Button(String(localized: "button.cancel")) { dismiss() }
-                }
-                ToolbarItem(placement: .confirmationAction) {
-                    Button(String(localized: "button.add")) {
-                        let trimmed = name.trimmingCharacters(in: .whitespaces)
-                        guard !trimmed.isEmpty else { return }
-                        onAdd(trimmed, selectedColor)
-                        dismiss()
-                    }
-                    .disabled(name.trimmingCharacters(in: .whitespaces).isEmpty)
-                }
-            }
-        }
-    }
-}
-
-// MARK: - Color Hex Extension
-
-extension Color {
-    init(hex: String) {
-        let hex = hex.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
-        var int: UInt64 = 0
-        Scanner(string: hex).scanHexInt64(&int)
-        let r = Double((int >> 16) & 0xFF) / 255
-        let g = Double((int >> 8) & 0xFF) / 255
-        let b = Double(int & 0xFF) / 255
-        self.init(red: r, green: g, blue: b)
-    }
-}
-
-#Preview {
-    NavigationStack {
-        CategoryView()
-    }
-}
--- a/IOS/Views/DashboardView.swift
+++ b/IOS/Views/DashboardView.swift
@ -1,17 +0,0 @@
-import SwiftUI
-
-struct DashboardView: View {
-    var body: some View {
-        ZStack {
-            Theme.background.ignoresSafeArea()
-            Text(String(localized: "tab.dashboard"))
-                .font(.title)
-                .foregroundStyle(Theme.primaryText)
-        }
-        .navigationTitle(String(localized: "tab.dashboard"))
-    }
-}
-
-#Preview {
-    DashboardView()
-}
--- a/IOS/Views/GoalView.swift
+++ b/IOS/Views/GoalView.swift
@ -1,306 +0,0 @@
-import SwiftUI
-import SwiftData
-import Charts
-
-struct GoalView: View {
-    @Environment(\.modelContext) private var modelContext
-    @State private var viewModel = GoalViewModel()
-    @State private var showAddSheet = false
-
-    var body: some View {
-        ZStack {
-            Theme.background.ignoresSafeArea()
-            Group {
-                if viewModel.goals.isEmpty {
-                    emptyState
-                } else {
-                    goalContent
-                }
-            }
-        }
-        .navigationTitle(String(localized: "tab.goals"))
-        .toolbar {
-            ToolbarItem(placement: .navigationBarTrailing) {
-                Button { showAddSheet = true } label: {
-                    Image(systemName: "plus")
-                        .foregroundStyle(Theme.green)
-                }
-            }
-        }
-        .sheet(isPresented: $showAddSheet) {
-            AddGoalSheet { targetType, conditions, frequency, task, category in
-                viewModel.addGoal(targetType: targetType, conditions: conditions, frequency: frequency, task: task, category: category)
-            }
-        }
-        .onAppear { viewModel.setup(context: modelContext) }
-    }
-
-    private var emptyState: some View {
-        VStack(spacing: 16) {
-            Image(systemName: "flag.badge.ellipsis")
-                .font(.system(size: 56))
-                .foregroundStyle(Theme.green.opacity(0.6))
-            Text(String(localized: "goal.empty"))
-                .foregroundStyle(Theme.primaryText.opacity(0.6))
-        }
-    }
-
-    private var goalContent: some View {
-        ScrollView {
-            VStack(spacing: 16) {
-                progressChart
-                    .padding(.horizontal)
-                goalCards
-                    .padding(.horizontal)
-            }
-            .padding(.vertical)
-        }
-    }
-
-    // MARK: - Chart
-
-    private var progressChart: some View {
-        VStack(alignment: .leading, spacing: 10) {
-            Text(String(localized: "goal.chart.title"))
-                .font(.headline)
-                .foregroundStyle(Theme.primaryText)
-
-            Chart(viewModel.goalProgress) { progress in
-                BarMark(
-                    x: .value(String(localized: "goal.progress"), progress.ratio * 100),
-                    y: .value("", progress.displayName)
-                )
-                .foregroundStyle(progress.isCompleted ? Theme.green : Theme.yellow)
-                .cornerRadius(4)
-            }
-            .chartXScale(domain: 0.0...100.0)
-            .chartXAxis {
-                AxisMarks(values: [0.0, 25.0, 50.0, 75.0, 100.0]) { value in
-                    AxisGridLine()
-                    AxisValueLabel {
-                        if let v = value.as(Double.self) {
-                            Text("\(Int(v))%")
-                                .font(.caption2)
-                                .foregroundStyle(Theme.primaryText.opacity(0.5))
-                        }
-                    }
-                }
-            }
-            .chartYAxis {
-                AxisMarks { _ in
-                    AxisValueLabel()
-                }
-            }
-            .frame(height: CGFloat(viewModel.goalProgress.count) * 48 + 20)
-        }
-        .padding()
-        .background(Theme.surface, in: RoundedRectangle(cornerRadius: 12))
-    }
-
-    // MARK: - Goal Cards
-
-    private var goalCards: some View {
-        VStack(spacing: 12) {
-            ForEach(viewModel.goalProgress) { progress in
-                GoalCard(progress: progress) {
-                    viewModel.deleteGoal(progress.goal)
-                }
-            }
-        }
-    }
-}
-
-// MARK: - Goal Card
-
-private struct GoalCard: View {
-    let progress: GoalProgress
-    let onDelete: () -> Void
-
-    var body: some View {
-        VStack(alignment: .leading, spacing: 10) {
-            HStack(alignment: .top) {
-                VStack(alignment: .leading, spacing: 2) {
-                    Text(progress.displayName)
-                        .font(.body)
-                        .fontWeight(.semibold)
-                        .foregroundStyle(Theme.primaryText)
-                    Text(subtitleText)
-                        .font(.caption)
-                        .foregroundStyle(Theme.primaryText.opacity(0.5))
-                }
-                Spacer()
-                Button(role: .destructive, action: onDelete) {
-                    Image(systemName: "trash")
-                        .font(.caption)
-                        .foregroundStyle(.red.opacity(0.7))
-                }
-                .buttonStyle(.plain)
-            }
-
-            ProgressView(value: progress.ratio)
-                .tint(progress.isCompleted ? Theme.green : Theme.yellow)
-
-            HStack {
-                Text(currentText)
-                    .font(.caption)
-                    .foregroundStyle(Theme.primaryText.opacity(0.6))
-                Spacer()
-                Text(progress.percentText)
-                    .font(.caption)
-                    .fontWeight(.bold)
-                    .foregroundStyle(progress.isCompleted ? Theme.green : Theme.yellow)
-            }
-        }
-        .padding()
-        .background(Theme.surface, in: RoundedRectangle(cornerRadius: 12))
-    }
-
-    private var subtitleText: String {
-        let cond = progress.goal.targetType == "count"
-            ? String(localized: "goal.condition.count")
-            : String(localized: "goal.condition.time")
-        let freq: String
-        switch progress.goal.frequency {
-        case .daily:   freq = String(localized: "goal.frequency.daily")
-        case .weekly:  freq = String(localized: "goal.frequency.weekly")
-        case .monthly: freq = String(localized: "goal.frequency.monthly")
-        }
-        return "\(cond) · \(freq)"
-    }
-
-    private var currentText: String {
-        if progress.goal.targetType == "count" {
-            return "\(Int(progress.current)) / \(Int(progress.target)) \(String(localized: "goal.condition.count"))"
-        } else {
-            let currentMins = Int(progress.current) / 60
-            let targetMins = Int(progress.target) / 60
-            return "\(currentMins)m / \(targetMins)m"
-        }
-    }
-}
-
-// MARK: - Add Goal Sheet
-
-private struct AddGoalSheet: View {
-    @Environment(\.dismiss) private var dismiss
-    @Query(sort: \TaskItem.name) private var tasks: [TaskItem]
-    @Query(sort: \Category.name) private var categories: [Category]
-
-    @State private var targetType: GoalTargetType = .task
-    @State private var selectedTask: TaskItem?
-    @State private var selectedCategory: Category?
-    @State private var conditionType: String = "count"
-    @State private var threshold: Double = 5
-    @State private var frequency: GoalFrequency = .daily
-
-    let onAdd: (String, Double, GoalFrequency, TaskItem?, Category?) -> Void
-
-    var body: some View {
-        NavigationStack {
-            Form {
-                Section(header: Text(String(localized: "goal.target"))) {
-                    Picker(String(localized: "goal.target"), selection: $targetType) {
-                        Text(String(localized: "goal.target.task")).tag(GoalTargetType.task)
-                        Text(String(localized: "goal.target.category")).tag(GoalTargetType.category)
-                    }
-                    .pickerStyle(.segmented)
-                    .onChange(of: targetType) { _, _ in
-                        selectedTask = nil
-                        selectedCategory = nil
-                    }
-
-                    if targetType == .task {
-                        Picker(String(localized: "goal.target.task"), selection: $selectedTask) {
-                            Text(String(localized: "goal.no.target")).tag(Optional<TaskItem>.none)
-                            ForEach(tasks) { task in
-                                Text("\(task.icon) \(task.name)").tag(Optional(task))
-                            }
-                        }
-                    } else {
-                        Picker(String(localized: "goal.target.category"), selection: $selectedCategory) {
-                            Text(String(localized: "goal.no.target")).tag(Optional<Category>.none)
-                            ForEach(categories) { cat in
-                                Text(cat.name).tag(Optional(cat))
-                            }
-                        }
-                    }
-                }
-
-                Section(header: Text(String(localized: "goal.condition"))) {
-                    Picker(String(localized: "goal.condition"), selection: $conditionType) {
-                        Text(String(localized: "goal.condition.count")).tag("count")
-                        Text(String(localized: "goal.condition.time")).tag("duration")
-                    }
-                    .pickerStyle(.segmented)
-                    .onChange(of: conditionType) { _, _ in threshold = 5 }
-                }
-
-                Section(header: Text(String(localized: "goal.threshold"))) {
-                    HStack {
-                        Slider(
-                            value: $threshold,
-                            in: conditionType == "count" ? 1.0...100.0 : 5.0...240.0,
-                            step: conditionType == "count" ? 1.0 : 5.0
-                        )
-                        .tint(Theme.green)
-                        Text(thresholdText)
-                            .font(.body)
-                            .monospacedDigit()
-                            .foregroundStyle(Theme.green)
-                            .frame(width: 52, alignment: .trailing)
-                    }
-                }
-
-                Section(header: Text(String(localized: "goal.frequency"))) {
-                    Picker(String(localized: "goal.frequency"), selection: $frequency) {
-                        Text(String(localized: "goal.frequency.daily")).tag(GoalFrequency.daily)
-                        Text(String(localized: "goal.frequency.weekly")).tag(GoalFrequency.weekly)
-                        Text(String(localized: "goal.frequency.monthly")).tag(GoalFrequency.monthly)
-                    }
-                    .pickerStyle(.segmented)
-                }
-            }
-            .navigationTitle(String(localized: "goal.add"))
-            .navigationBarTitleDisplayMode(.inline)
-            .toolbar {
-                ToolbarItem(placement: .cancellationAction) {
-                    Button(String(localized: "button.cancel")) { dismiss() }
-                }
-                ToolbarItem(placement: .confirmationAction) {
-                    Button(String(localized: "button.add")) {
-                        let storedConditions = conditionType == "duration" ? threshold * 60.0 : threshold
-                        onAdd(
-                            conditionType,
-                            storedConditions,
-                            frequency,
-                            targetType == .task ? selectedTask : nil,
-                            targetType == .category ? selectedCategory : nil
-                        )
-                        dismiss()
-                    }
-                    .disabled(!canAdd)
-                }
-            }
-        }
-    }
-
-    private var thresholdText: String {
-        if conditionType == "count" {
-            return "\(Int(threshold))"
-        } else {
-            let h = Int(threshold) / 60
-            let m = Int(threshold) % 60
-            return h > 0 ? "\(h)h\(m)m" : "\(Int(threshold))m"
-        }
-    }
-
-    private var canAdd: Bool {
-        targetType == .task ? selectedTask != nil : selectedCategory != nil
-    }
-}
-
-#Preview {
-    NavigationStack {
-        GoalView()
-    }
-}
--- a/IOS/Views/LaunchScreenView.swift
+++ b/IOS/Views/LaunchScreenView.swift
@ -1,22 +0,0 @@
-import SwiftUI
-
-struct LaunchScreenView: View {
-    var body: some View {
-        ZStack {
-            Theme.background
-                .ignoresSafeArea()
-            VStack(spacing: 12) {
-                Text("🍋🍈")
-                    .font(.system(size: 60))
-                Text("LemonLimeTracker")
-                    .font(.largeTitle)
-                    .fontWeight(.bold)
-                    .foregroundStyle(Theme.green)
-            }
-        }
-    }
-}
-
-#Preview {
-    LaunchScreenView()
-}
--- a/IOS/Views/MainTabView.swift
+++ b/IOS/Views/MainTabView.swift
@ -1,47 +0,0 @@
-import SwiftUI
-
-struct MainTabView: View {
-    var body: some View {
-        TabView {
-            NavigationStack {
-                DashboardView()
-            }
-            .tabItem {
-                Label(String(localized: "tab.dashboard"), systemImage: "chart.bar.fill")
-            }
-
-            NavigationStack {
-                CategoryView()
-            }
-            .tabItem {
-                Label(String(localized: "tab.category"), systemImage: "folder.fill")
-            }
-
-            NavigationStack {
-                TaskTrackerView()
-            }
-            .tabItem {
-                Label(String(localized: "tab.tasks"), systemImage: "checkmark.circle.fill")
-            }
-
-            NavigationStack {
-                GoalView()
-            }
-            .tabItem {
-                Label(String(localized: "tab.goals"), systemImage: "flag.fill")
-            }
-
-            NavigationStack {
-                SettingsView()
-            }
-            .tabItem {
-                Label(String(localized: "tab.settings"), systemImage: "gearshape.fill")
-            }
-        }
-        .tint(Theme.green)
-    }
-}
-
-#Preview {
-    MainTabView()
-}
--- a/IOS/Views/RootView.swift
+++ b/IOS/Views/RootView.swift
@ -1,24 +0,0 @@
-import SwiftUI
-
-struct RootView: View {
-    @State private var isLaunching = true
-
-    var body: some View {
-        if isLaunching {
-            LaunchScreenView()
-                .onAppear {
-                    DispatchQueue.main.asyncAfter(deadline: .now() + 1.5) {
-                        withAnimation(.easeInOut(duration: 0.4)) {
-                            isLaunching = false
-                        }
-                    }
-                }
-        } else {
-            MainTabView()
-        }
-    }
-}
-
-#Preview {
-    RootView()
-}
--- a/IOS/Views/SettingsView.swift
+++ b/IOS/Views/SettingsView.swift
@ -1,17 +0,0 @@
-import SwiftUI
-
-struct SettingsView: View {
-    var body: some View {
-        ZStack {
-            Theme.background.ignoresSafeArea()
-            Text(String(localized: "tab.settings"))
-                .font(.title)
-                .foregroundStyle(Theme.primaryText)
-        }
-        .navigationTitle(String(localized: "tab.settings"))
-    }
-}
-
-#Preview {
-    SettingsView()
-}
--- a/IOS/Views/TaskTrackerView.swift
+++ b/IOS/Views/TaskTrackerView.swift
@ -1,212 +0,0 @@
-import SwiftUI
-import SwiftData
-
-struct TaskTrackerView: View {
-    @Environment(\.modelContext) private var modelContext
-    @State private var viewModel = TaskViewModel()
-    @State private var showAddSheet = false
-
-    var body: some View {
-        ZStack {
-            Theme.background.ignoresSafeArea()
-            Group {
-                if viewModel.tasks.isEmpty {
-                    emptyState
-                } else {
-                    taskList
-                }
-            }
-        }
-        .navigationTitle(String(localized: "tab.tasks"))
-        .toolbar {
-            ToolbarItem(placement: .navigationBarTrailing) {
-                Button {
-                    showAddSheet = true
-                } label: {
-                    Image(systemName: "plus")
-                        .foregroundStyle(Theme.green)
-                }
-            }
-        }
-        .sheet(isPresented: $showAddSheet) {
-            AddTaskSheet { name, icon, type, category in
-                viewModel.addTask(name: name, icon: icon, type: type, category: category)
-            }
-        }
-        .onAppear {
-            viewModel.setup(context: modelContext)
-        }
-    }
-
-    private var emptyState: some View {
-        VStack(spacing: 16) {
-            Image(systemName: "checkmark.circle.badge.plus")
-                .font(.system(size: 56))
-                .foregroundStyle(Theme.green.opacity(0.6))
-            Text(String(localized: "task.empty"))
-                .foregroundStyle(Theme.primaryText.opacity(0.6))
-        }
-    }
-
-    private var taskList: some View {
-        List {
-            ForEach(viewModel.tasks) { task in
-                TaskRow(task: task, viewModel: viewModel)
-                    .listRowBackground(Theme.surface)
-                    .swipeActions(edge: .trailing, allowsFullSwipe: false) {
-                        Button(role: .destructive) {
-                            viewModel.deleteTask(task)
-                        } label: {
-                            Label(String(localized: "task.delete"), systemImage: "trash")
-                        }
-                    }
-                    .swipeActions(edge: .leading, allowsFullSwipe: true) {
-                        if task.type == .count {
-                            Button {
-                                viewModel.addCount(to: task)
-                            } label: {
-                                Label(String(localized: "task.add.count"), systemImage: "plus")
-                            }
-                            .tint(Theme.green)
-                        }
-                    }
-            }
-        }
-        .listStyle(.plain)
-        .scrollContentBackground(.hidden)
-    }
-}
-
-// MARK: - Task Row
-
-private struct TaskRow: View {
-    let task: TaskItem
-    let viewModel: TaskViewModel
-
-    private var isRunning: Bool { viewModel.isTimerRunning(for: task.id) }
-
-    var body: some View {
-        HStack(spacing: 12) {
-            Text(task.icon)
-                .font(.title2)
-                .frame(width: 36)
-
-            VStack(alignment: .leading, spacing: 2) {
-                Text(task.name)
-                    .font(.body)
-                    .fontWeight(.medium)
-                    .foregroundStyle(Theme.primaryText)
-                if let category = task.category {
-                    Text(category.name)
-                        .font(.caption2)
-                        .foregroundStyle(Theme.green)
-                }
-            }
-
-            Spacer()
-
-            if task.type == .time {
-                timeControls
-            } else {
-                countBadge
-            }
-        }
-        .padding(.vertical, 4)
-    }
-
-    private var timeControls: some View {
-        HStack(spacing: 8) {
-            if isRunning {
-                Text(viewModel.formattedElapsed(for: task.id))
-                    .font(.system(.subheadline, design: .monospaced))
-                    .foregroundStyle(Theme.green)
-                    .contentTransition(.numericText())
-                    .animation(.linear(duration: 0.3), value: viewModel.elapsedSeconds[task.id])
-            }
-            Button {
-                viewModel.toggleTimer(for: task)
-            } label: {
-                Image(systemName: isRunning ? "stop.fill" : "play.fill")
-                    .font(.title3)
-                    .foregroundStyle(isRunning ? Theme.yellow : Theme.green)
-                    .frame(width: 36, height: 36)
-                    .background(
-                        Circle()
-                            .fill(isRunning ? Theme.yellow.opacity(0.15) : Theme.green.opacity(0.15))
-                    )
-            }
-            .buttonStyle(.plain)
-        }
-    }
-
-    private var countBadge: some View {
-        let count = viewModel.todayCount(for: task)
-        return Text("×\(count)")
-            .font(.headline)
-            .monospacedDigit()
-            .foregroundStyle(count > 0 ? Theme.green : Theme.primaryText.opacity(0.3))
-    }
-}
-
-// MARK: - Add Task Sheet
-
-private struct AddTaskSheet: View {
-    @Environment(\.dismiss) private var dismiss
-    @Query private var categories: [Category]
-
-    @State private var name = ""
-    @State private var icon = "⭐"
-    @State private var type: TaskType = .count
-    @State private var selectedCategory: Category?
-
-    let onAdd: (String, String, TaskType, Category?) -> Void
-
-    var body: some View {
-        NavigationStack {
-            Form {
-                Section {
-                    TextField(String(localized: "task.name"), text: $name)
-                    TextField(String(localized: "task.icon"), text: $icon)
-                }
-                Section {
-                    Picker(String(localized: "task.type"), selection: $type) {
-                        Text(String(localized: "task.type.count")).tag(TaskType.count)
-                        Text(String(localized: "task.type.time")).tag(TaskType.time)
-                    }
-                    .pickerStyle(.segmented)
-                }
-                if !categories.isEmpty {
-                    Section {
-                        Picker(String(localized: "task.category"), selection: $selectedCategory) {
-                            Text(String(localized: "task.category.none")).tag(Optional<Category>.none)
-                            ForEach(categories) { cat in
-                                Text(cat.name).tag(Optional(cat))
-                            }
-                        }
-                    }
-                }
-            }
-            .navigationTitle(String(localized: "task.add"))
-            .navigationBarTitleDisplayMode(.inline)
-            .toolbar {
-                ToolbarItem(placement: .cancellationAction) {
-                    Button(String(localized: "button.cancel")) { dismiss() }
-                }
-                ToolbarItem(placement: .confirmationAction) {
-                    Button(String(localized: "button.add")) {
-                        let trimmed = name.trimmingCharacters(in: .whitespaces)
-                        guard !trimmed.isEmpty else { return }
-                        let resolvedIcon = icon.trimmingCharacters(in: .whitespaces).isEmpty ? "⭐" : icon
-                        onAdd(trimmed, resolvedIcon, type, selectedCategory)
-                        dismiss()
-                    }
-                    .disabled(name.trimmingCharacters(in: .whitespaces).isEmpty)
-                }
-            }
-        }
-    }
-}
-
-#Preview {
-    TaskTrackerView()
-}
--- a/LemonLimeTracker-Info.plist
+++ b/LemonLimeTracker-Info.plist
@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>CFBundleLocalizations</key>
-	<array>
-		<string>ko</string>
-		<string>en</string>
-	</array>
-	<key>NSSupportsLiveActivities</key>
-	<true/>
-</dict>
-</plist>
--- a/LemonLimeTracker.xcodeproj/project.pbxproj
+++ b/LemonLimeTracker.xcodeproj/project.pbxproj
@ -1,543 +0,0 @@
-// !$*UTF8*$!
-{
-	archiveVersion = 1;
-	classes = {
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-	objects = {
-
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-/* End PBXBuildFile section */
-
-/* Begin PBXContainerItemProxy section */
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-			proxyType = 1;
-			remoteGlobalIDString = 7280EB3C2FE41F10006B83D9;
-			remoteInfo = LemonLimeWidgetExtension;
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-/* End PBXContainerItemProxy section */
-
-/* Begin PBXCopyFilesBuildPhase section */
-		7280EB542FE41F12006B83D9 /* Embed Foundation Extensions */ = {
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-			buildActionMask = 2147483647;
-			dstPath = "";
-			dstSubfolderSpec = 13;
-			files = (
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-			);
-			name = "Embed Foundation Extensions";
-			runOnlyForDeploymentPostprocessing = 0;
-		};
-/* End PBXCopyFilesBuildPhase section */
-
-/* Begin PBXFileReference section */
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-/* End PBXFileReference section */
-
-/* Begin PBXFileSystemSynchronizedBuildFileExceptionSet section */
-		7280EB502FE41F12006B83D9 /* Exceptions for "LemonLimeWidget" folder in "LemonLimeWidgetExtension" target */ = {
-			isa = PBXFileSystemSynchronizedBuildFileExceptionSet;
-			membershipExceptions = (
-				Info.plist,
-			);
-			target = 7280EB3C2FE41F10006B83D9 /* LemonLimeWidgetExtension */;
-		};
-		7280EB5A2FE42219006B83D9 /* Exceptions for "IOS" folder in "LemonLimeWidgetExtension" target */ = {
-			isa = PBXFileSystemSynchronizedBuildFileExceptionSet;
-			membershipExceptions = (
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-			);
-			target = 7280EB3C2FE41F10006B83D9 /* LemonLimeWidgetExtension */;
-		};
-/* End PBXFileSystemSynchronizedBuildFileExceptionSet section */
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-/* Begin PBXFileSystemSynchronizedRootGroup section */
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-			isa = PBXFileSystemSynchronizedRootGroup;
-			exceptions = (
-				7280EB5A2FE42219006B83D9 /* Exceptions for "IOS" folder in "LemonLimeWidgetExtension" target */,
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-			path = IOS;
-			sourceTree = "<group>";
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-/* Begin PBXFrameworksBuildPhase section */
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-			);
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-/* Begin PBXGroup section */
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-/* End PBXGroup section */
-
-/* Begin PBXNativeTarget section */
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-				7280EB542FE41F12006B83D9 /* Embed Foundation Extensions */,
-			);
-			buildRules = (
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-			fileSystemSynchronizedGroups = (
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-			name = LemonLimeTracker;
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-				INFOPLIST_KEY_UILaunchScreen_Generation = YES;
-				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				LD_RUNPATH_SEARCH_PATHS = (
-					"$(inherited)",
-					"@executable_path/Frameworks",
-				);
-				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = com.yechan.LemonLimeTracker;
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				STRING_CATALOG_GENERATE_SYMBOLS = YES;
-				SWIFT_APPROACHABLE_CONCURRENCY = YES;
-				SWIFT_DEFAULT_ACTOR_ISOLATION = MainActor;
-				SWIFT_EMIT_LOC_STRINGS = YES;
-				SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
-				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = "1,2";
-			};
-			name = Release;
-		};
-		7280EB522FE41F12006B83D9 /* Debug */ = {
-			isa = XCBuildConfiguration;
-			buildSettings = {
-				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
-				ASSETCATALOG_COMPILER_WIDGET_BACKGROUND_COLOR_NAME = WidgetBackground;
-				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 1;
-				GENERATE_INFOPLIST_FILE = YES;
-				INFOPLIST_FILE = LemonLimeWidget/Info.plist;
-				INFOPLIST_KEY_CFBundleDisplayName = LemonLimeWidget;
-				INFOPLIST_KEY_NSHumanReadableCopyright = "";
-				LD_RUNPATH_SEARCH_PATHS = (
-					"$(inherited)",
-					"@executable_path/Frameworks",
-					"@executable_path/../../Frameworks",
-				);
-				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = com.yechan.LemonLimeTracker.LemonLimeWidget;
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				SKIP_INSTALL = YES;
-				STRING_CATALOG_GENERATE_SYMBOLS = YES;
-				SWIFT_APPROACHABLE_CONCURRENCY = YES;
-				SWIFT_EMIT_LOC_STRINGS = YES;
-				SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
-				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = "1,2";
-			};
-			name = Debug;
-		};
-		7280EB532FE41F12006B83D9 /* Release */ = {
-			isa = XCBuildConfiguration;
-			buildSettings = {
-				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
-				ASSETCATALOG_COMPILER_WIDGET_BACKGROUND_COLOR_NAME = WidgetBackground;
-				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 1;
-				GENERATE_INFOPLIST_FILE = YES;
-				INFOPLIST_FILE = LemonLimeWidget/Info.plist;
-				INFOPLIST_KEY_CFBundleDisplayName = LemonLimeWidget;
-				INFOPLIST_KEY_NSHumanReadableCopyright = "";
-				LD_RUNPATH_SEARCH_PATHS = (
-					"$(inherited)",
-					"@executable_path/Frameworks",
-					"@executable_path/../../Frameworks",
-				);
-				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = com.yechan.LemonLimeTracker.LemonLimeWidget;
-				PRODUCT_NAME = "$(TARGET_NAME)";
-				SKIP_INSTALL = YES;
-				STRING_CATALOG_GENERATE_SYMBOLS = YES;
-				SWIFT_APPROACHABLE_CONCURRENCY = YES;
-				SWIFT_EMIT_LOC_STRINGS = YES;
-				SWIFT_UPCOMING_FEATURE_MEMBER_IMPORT_VISIBILITY = YES;
-				SWIFT_VERSION = 5.0;
-				TARGETED_DEVICE_FAMILY = "1,2";
-			};
-			name = Release;
-		};
-/* End XCBuildConfiguration section */
-
-/* Begin XCConfigurationList section */
-		7280EAF32FE40D38006B83D9 /* Build configuration list for PBXProject "LemonLimeTracker" */ = {
-			isa = XCConfigurationList;
-			buildConfigurations = (
-				7280EB012FE40D39006B83D9 /* Debug */,
-				7280EB022FE40D39006B83D9 /* Release */,
-			);
-			defaultConfigurationIsVisible = 0;
-			defaultConfigurationName = Release;
-		};
-		7280EB032FE40D39006B83D9 /* Build configuration list for PBXNativeTarget "LemonLimeTracker" */ = {
-			isa = XCConfigurationList;
-			buildConfigurations = (
-				7280EB042FE40D39006B83D9 /* Debug */,
-				7280EB052FE40D39006B83D9 /* Release */,
-			);
-			defaultConfigurationIsVisible = 0;
-			defaultConfigurationName = Release;
-		};
-		7280EB512FE41F12006B83D9 /* Build configuration list for PBXNativeTarget "LemonLimeWidgetExtension" */ = {
-			isa = XCConfigurationList;
-			buildConfigurations = (
-				7280EB522FE41F12006B83D9 /* Debug */,
-				7280EB532FE41F12006B83D9 /* Release */,
-			);
-			defaultConfigurationIsVisible = 0;
-			defaultConfigurationName = Release;
-		};
-/* End XCConfigurationList section */
-	};
-	rootObject = 7280EAF02FE40D38006B83D9 /* Project object */;
-}
--- a/LemonLimeTracker.xcodeproj/project.xcworkspace/contents.xcworkspacedata
+++ b/LemonLimeTracker.xcodeproj/project.xcworkspace/contents.xcworkspacedata
@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Workspace
-   version = "1.0">
-   <FileRef
-      location = "self:">
-   </FileRef>
-</Workspace>
--- a/LemonLimeTracker.xcodeproj/xcuserdata/ceuak.xcuserdatad/xcschemes/xcschememanagement.plist
+++ b/LemonLimeTracker.xcodeproj/xcuserdata/ceuak.xcuserdatad/xcschemes/xcschememanagement.plist
@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>SchemeUserState</key>
-	<dict>
-		<key>LemonLimeTracker.xcscheme_^#shared#^_</key>
-		<dict>
-			<key>orderHint</key>
-			<integer>0</integer>
-		</dict>
-		<key>LemonLimeWidgetExtension.xcscheme_^#shared#^_</key>
-		<dict>
-			<key>orderHint</key>
-			<integer>1</integer>
-		</dict>
-	</dict>
-</dict>
-</plist>
--- a/LemonLimeWidget/Assets.xcassets/AccentColor.colorset/Contents.json
+++ b/LemonLimeWidget/Assets.xcassets/AccentColor.colorset/Contents.json
@ -1,11 +0,0 @@
-{
-  "colors" : [
-    {
-      "idiom" : "universal"
-    }
-  ],
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}
--- a/LemonLimeWidget/Assets.xcassets/AppIcon.appiconset/Contents.json
+++ b/LemonLimeWidget/Assets.xcassets/AppIcon.appiconset/Contents.json
@ -1,35 +0,0 @@
-{
-  "images" : [
-    {
-      "idiom" : "universal",
-      "platform" : "ios",
-      "size" : "1024x1024"
-    },
-    {
-      "appearances" : [
-        {
-          "appearance" : "luminosity",
-          "value" : "dark"
-        }
-      ],
-      "idiom" : "universal",
-      "platform" : "ios",
-      "size" : "1024x1024"
-    },
-    {
-      "appearances" : [
-        {
-          "appearance" : "luminosity",
-          "value" : "tinted"
-        }
-      ],
-      "idiom" : "universal",
-      "platform" : "ios",
-      "size" : "1024x1024"
-    }
-  ],
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}
--- a/LemonLimeWidget/Assets.xcassets/Contents.json
+++ b/LemonLimeWidget/Assets.xcassets/Contents.json
@ -1,6 +0,0 @@
-{
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}
--- a/LemonLimeWidget/Assets.xcassets/WidgetBackground.colorset/Contents.json
+++ b/LemonLimeWidget/Assets.xcassets/WidgetBackground.colorset/Contents.json
@ -1,11 +0,0 @@
-{
-  "colors" : [
-    {
-      "idiom" : "universal"
-    }
-  ],
-  "info" : {
-    "author" : "xcode",
-    "version" : 1
-  }
-}
--- a/LemonLimeWidget/Info.plist
+++ b/LemonLimeWidget/Info.plist
@ -1,11 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>NSExtension</key>
-	<dict>
-		<key>NSExtensionPointIdentifier</key>
-		<string>com.apple.widgetkit-extension</string>
-	</dict>
-</dict>
-</plist>
--- a/LemonLimeWidget/LemonLimeWidget.swift
+++ b/LemonLimeWidget/LemonLimeWidget.swift
@ -1,84 +0,0 @@
-//
-//  LemonLimeWidget.swift
-//  LemonLimeWidget
-//
-//  Created by 송예찬 on 6/18/26.
-//
-
-import WidgetKit
-import SwiftUI
-
-struct Provider: TimelineProvider {
-    func placeholder(in context: Context) -> SimpleEntry {
-        SimpleEntry(date: Date(), emoji: "😀")
-    }
-
-    func getSnapshot(in context: Context, completion: @escaping (SimpleEntry) -> ()) {
-        let entry = SimpleEntry(date: Date(), emoji: "😀")
-        completion(entry)
-    }
-
-    func getTimeline(in context: Context, completion: @escaping (Timeline<Entry>) -> ()) {
-        var entries: [SimpleEntry] = []
-
-        // Generate a timeline consisting of five entries an hour apart, starting from the current date.
-        let currentDate = Date()
-        for hourOffset in 0 ..< 5 {
-            let entryDate = Calendar.current.date(byAdding: .hour, value: hourOffset, to: currentDate)!
-            let entry = SimpleEntry(date: entryDate, emoji: "😀")
-            entries.append(entry)
-        }
-
-        let timeline = Timeline(entries: entries, policy: .atEnd)
-        completion(timeline)
-    }
-
-//    func relevances() async -> WidgetRelevances<Void> {
-//        // Generate a list containing the contexts this widget is relevant in.
-//    }
-}
-
-struct SimpleEntry: TimelineEntry {
-    let date: Date
-    let emoji: String
-}
-
-struct LemonLimeWidgetEntryView : View {
-    var entry: Provider.Entry
-
-    var body: some View {
-        VStack {
-            Text("Time:")
-            Text(entry.date, style: .time)
-
-            Text("Emoji:")
-            Text(entry.emoji)
-        }
-    }
-}
-
-struct LemonLimeWidget: Widget {
-    let kind: String = "LemonLimeWidget"
-
-    var body: some WidgetConfiguration {
-        StaticConfiguration(kind: kind, provider: Provider()) { entry in
-            if #available(iOS 17.0, *) {
-                LemonLimeWidgetEntryView(entry: entry)
-                    .containerBackground(.fill.tertiary, for: .widget)
-            } else {
-                LemonLimeWidgetEntryView(entry: entry)
-                    .padding()
-                    .background()
-            }
-        }
-        .configurationDisplayName("My Widget")
-        .description("This is an example widget.")
-    }
-}
-
-#Preview(as: .systemSmall) {
-    LemonLimeWidget()
-} timeline: {
-    SimpleEntry(date: .now, emoji: "😀")
-    SimpleEntry(date: .now, emoji: "🤩")
-}
--- a/LemonLimeWidget/LemonLimeWidgetBundle.swift
+++ b/LemonLimeWidget/LemonLimeWidgetBundle.swift
@ -1,17 +0,0 @@
-//
-//  LemonLimeWidgetBundle.swift
-//  LemonLimeWidget
-//
-//  Created by 송예찬 on 6/18/26.
-//
-
-import WidgetKit
-import SwiftUI
-
-@main
-struct LemonLimeWidgetBundle: WidgetBundle {
-    var body: some Widget {
-        LemonLimeWidget()
-        LemonLimeWidgetLiveActivity()
-    }
-}
--- a/LemonLimeWidget/LemonLimeWidgetLiveActivity.swift
+++ b/LemonLimeWidget/LemonLimeWidgetLiveActivity.swift
@ -1,125 +0,0 @@
-//
-//  LemonLimeWidgetLiveActivity.swift
-//  LemonLimeWidget
-//
-//  Created by 송예찬 on 6/18/26.
-//
-
-import ActivityKit
-import WidgetKit
-import SwiftUI
-
-private let timerEndDate = Date.distantFuture
-
-struct LemonLimeWidgetLiveActivity: Widget {
-    var body: some WidgetConfiguration {
-        ActivityConfiguration(for: TimerActivityAttributes.self) { context in
-            // MARK: Lock Screen / Banner
-            HStack(spacing: 14) {
-                Image(systemName: "timer")
-                    .font(.title2.weight(.semibold))
-                    .foregroundStyle(.yellow)
-
-                VStack(alignment: .leading, spacing: 3) {
-                    Text(context.attributes.taskName)
-                        .font(.subheadline.weight(.semibold))
-                        .foregroundStyle(.white)
-                        .lineLimit(1)
-
-                    Text(timerInterval: context.state.startDate...timerEndDate, countsDown: false)
-                        .font(.caption.monospacedDigit())
-                        .foregroundStyle(.yellow)
-                }
-
-                Spacer()
-
-                Text(context.attributes.taskIcon)
-                    .font(.largeTitle)
-            }
-            .padding(.horizontal, 16)
-            .padding(.vertical, 12)
-            .activityBackgroundTint(Color(red: 0.08, green: 0.30, blue: 0.08))
-            .activitySystemActionForegroundColor(.yellow)
-
-        } dynamicIsland: { context in
-            DynamicIsland {
-                // MARK: Expanded – top row
-                DynamicIslandExpandedRegion(.leading) {
-                    Label {
-                        Text(context.attributes.taskName)
-                            .font(.caption.weight(.semibold))
-                            .lineLimit(1)
-                    } icon: {
-                        Text(context.attributes.taskIcon)
-                            .font(.caption)
-                    }
-                    .foregroundStyle(.green)
-                }
-
-                DynamicIslandExpandedRegion(.trailing) {
-                    Image(systemName: "circle.fill")
-                        .font(.caption)
-                        .foregroundStyle(.green)
-                        .padding(.trailing, 4)
-                }
-
-                // MARK: Expanded – center (large timer)
-                DynamicIslandExpandedRegion(.bottom) {
-                    Text(timerInterval: context.state.startDate...timerEndDate, countsDown: false)
-                        .font(.system(size: 44, weight: .bold, design: .monospaced))
-                        .foregroundStyle(.yellow)
-                        .frame(maxWidth: .infinity, alignment: .center)
-                        .padding(.top, 4)
-                }
-
-            } compactLeading: {
-                Image(systemName: "timer")
-                    .foregroundStyle(.green)
-                    .font(.caption.weight(.semibold))
-
-            } compactTrailing: {
-                Text(timerInterval: context.state.startDate...timerEndDate, countsDown: false)
-                    .monospacedDigit()
-                    .font(.caption2.weight(.medium))
-                    .foregroundStyle(.yellow)
-                    .frame(maxWidth: 52)
-
-            } minimal: {
-                ZStack {
-                    Circle()
-                        .fill(LinearGradient(
-                            colors: [.green, Color(red: 0.8, green: 0.9, blue: 0.0)],
-                            startPoint: .topLeading,
-                            endPoint: .bottomTrailing
-                        ))
-                    Text(context.attributes.taskIcon)
-                        .font(.system(size: 11))
-                }
-            }
-            .keylineTint(.green)
-        }
-    }
-}
-
-// MARK: - Previews
-
-extension TimerActivityAttributes {
-    fileprivate static var preview: TimerActivityAttributes {
-        TimerActivityAttributes(taskName: "운동하기", taskIcon: "🏃")
-    }
-}
-
-extension TimerActivityAttributes.ContentState {
-    fileprivate static var running: TimerActivityAttributes.ContentState {
-        TimerActivityAttributes.ContentState(
-            startDate: Date().addingTimeInterval(-125),
-            elapsedSeconds: 125
-        )
-    }
-}
-
-#Preview("Notification", as: .content, using: TimerActivityAttributes.preview) {
-    LemonLimeWidgetLiveActivity()
-} contentStates: {
-    TimerActivityAttributes.ContentState.running
-}
--- a/code_study/Baekjoon/c/1000.c
+++ b/code_study/Baekjoon/c/1000.c
@ -0,0 +1,11 @@
+#include <stdio.h>
+
+int main() {
+	
+	int a, b, n;
+	scanf("%d %d",&a, &b);
+	n = a + b;
+	printf("%d", n);
+	
+	return 0;
+}
--- a/code_study/Baekjoon/c/1001.c
+++ b/code_study/Baekjoon/c/1001.c
@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int main() {
+	
+	int a, b;
+	
+	scanf("%d %d",&a, &b);
+	printf("%d",a-b);
+	
+	return 0;
+	
+}
--- a/code_study/Baekjoon/c/1003.c
+++ b/code_study/Baekjoon/c/1003.c
@ -0,0 +1,24 @@
+#include <stdio.h>
+
+int main() {
+    int arr[41][2];
+    arr[0][0] = 1;
+    arr[0][1] = 0;
+    arr[1][0] = 0;
+    arr[1][1] = 1;
+    for(int i=2; i<=40; i++){
+        arr[i][0] = arr[i-1][0] + arr[i-2][0];
+        arr[i][1] = arr[i-1][1] + arr[i-2][1];
+    }
+
+    int T;
+    scanf("%d",&T);
+    
+    for(int i=0; i<T; i++){
+        int N;
+        scanf("%d",&N);
+        printf("%d %d\n",arr[N][0],arr[N][1]);
+    }
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/10039.c
+++ b/code_study/Baekjoon/c/10039.c
@ -0,0 +1,13 @@
+#include <stdio.h>
+
+int main() {
+    int ans = 0;
+    for(int i=0; i<5; i++) {
+        int n;
+        scanf("%d",&n);
+        if(n < 40) n = 40;
+        ans += n/5;
+    }
+    printf("%d\n",ans);
+    return 0;
+}
--- a/code_study/Baekjoon/c/1005_1.c
+++ b/code_study/Baekjoon/c/1005_1.c
@ -0,0 +1,58 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int dp[1001];
+int build_info[1001][1001];
+int build_time[1001];
+int T, N, K, W;
+
+int max(int a, int b) {
+    return a > b ? a : b;
+}
+
+int solve(int target);
+
+int main() {
+    scanf("%d", &T);
+
+    int* ans = (int*)malloc(sizeof(int)*T);
+
+    for(int t=0; t<T; t++) {
+        scanf("%d %d",&N, &K);
+
+        for(int i=1; i<=N; i++) {
+            scanf("%d",&build_time[i]);
+            build_info[i][0] = 0;
+            dp[i] = -1;
+        }
+
+        for(int i=0; i<K; i++) {
+            int u, v;
+            scanf("%d %d",&u, &v);
+            build_info[v][++build_info[v][0]] = u;
+        }
+
+        scanf("%d", &W);
+
+        ans[t] = solve(W);
+    }
+
+    for(int t=0; t<T; t++) printf("%d\n", ans[t]);
+    free(ans);
+
+    return 0;
+}
+
+int solve(int target) {
+    if(dp[target] == -1) {
+        int max_built_time = 0;
+        for(int i=1; i<=build_info[target][0]; i++) {
+            int prev = build_info[target][i];
+            max_built_time = max(max_built_time, solve(prev));
+        }
+
+        dp[target] = max_built_time + build_time[target];
+    }
+
+    return dp[target];
+}
--- a/code_study/Baekjoon/c/1005_2.c
+++ b/code_study/Baekjoon/c/1005_2.c
@ -0,0 +1,75 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int T, N, K, W;
+int dp[1001];
+int build_info[1001][1001];
+int build_time[1001];
+int indegree[1001];
+int q[1001];
+
+int max(int a, int b) {
+    return a > b ? a : b;
+}
+
+int solve();
+
+int main() {
+    scanf("%d", &T);
+
+    int* ans = (int*)malloc(sizeof(int)*T);
+
+    for(int t=0; t<T; t++) {
+        scanf("%d %d",&N, &K);
+
+        for(int i=1; i<=N; i++) {
+            scanf("%d",&build_time[i]);
+            build_info[i][0] = 0;
+            indegree[i] = 0;
+            dp[i] = -1;
+        }
+
+        for(int i=0; i<K; i++) {
+            int u, v;
+            scanf("%d %d",&u, &v);
+            build_info[u][++build_info[u][0]] = v;
+            indegree[v]++;
+        }
+
+        scanf("%d", &W);
+
+        ans[t] = solve();
+    }
+
+    for(int t=0; t<T; t++) printf("%d\n", ans[t]);
+    free(ans);
+
+    return 0;
+}
+
+int solve() {
+    int front = 0, rear = 0;
+    for(int i=1; i<=N; i++) {
+        if(indegree[i] == 0) {
+            q[rear++] = i;
+            dp[i] = build_time[i];
+        }
+    }
+
+    while(front != rear) {
+        int now = q[front++];
+
+        if(now == W) break;
+
+        for(int i=1; i<=build_info[now][0]; i++) {
+            int next = build_info[now][i];
+
+            dp[next] = max(dp[next], dp[now] + build_time[next]);
+            
+            indegree[next]--;
+            if(indegree[next] == 0) q[rear++] = next;
+        }
+    }
+
+    return dp[W];
+}
--- a/code_study/Baekjoon/c/1008.c
+++ b/code_study/Baekjoon/c/1008.c
@ -0,0 +1,9 @@
+#include <stdio.h>
+
+int main() {
+	int a, b;
+	scanf("%d %d",&a, &b);
+	printf("%.9f",(double)a/b);
+	return 0;
+	
+}
--- a/code_study/Baekjoon/c/10101.c
+++ b/code_study/Baekjoon/c/10101.c
@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int main() {
+    int a, b, c, sum=0;
+    scanf("%d %d %d",&a,&b,&c);
+    sum = a + b + c;
+    if(sum!=180) {
+        printf("Error\n");
+    }
+    else if(a==b && a==c) {
+        printf("Equilateral\n");
+    }
+    else if(a==b || a==c || b==c) {
+        printf("Isosceles\n");
+    }
+    else {
+        printf("Scalene\n");
+    }
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/10170.c
+++ b/code_study/Baekjoon/c/10170.c
@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main() {
+    printf("NFC West       W   L  T\n-----------------------\nSeattle        13  3  0\nSan Francisco  12  4  0\nArizona        10  6  0\nSt. Louis      7   9  0\n\nNFC North      W   L  T\n-----------------------\nGreen Bay      8   7  1\nChicago        8   8  0\nDetroit        7   9  0\nMinnesota      5  10  1\n");
+    return 0;
+}
--- a/code_study/Baekjoon/c/1018.c
+++ b/code_study/Baekjoon/c/1018.c
@ -0,0 +1,41 @@
+#include <stdio.h>
+
+int main() {
+    char board[51][51];
+    int N, M, cnt1, cnt2, min, res=64;
+    scanf("%d %d",&N,&M);
+    for(int i=0; i<N; i++) {
+        scanf("%s",board[i]);
+    }
+
+    for(int i=0; i<N-7; i++) {
+        for(int j=0; j<M-7; j++) {
+            cnt1 = 0;
+            cnt2 = 0;
+            for(int n=0; n<8; n++) {
+                for(int m=0; m<8; m++) {
+                    if((n+m)%2==0){
+                        if(board[i+n][j+m]!='W') cnt1++;
+                        if(board[i+n][j+m]!='B') cnt2++;
+                    }
+                    else{
+                        if(board[i+n][j+m]!='B') cnt1++;
+                        if(board[i+n][j+m]!='W') cnt2++;
+                    }
+                }
+            }
+            min = cnt1>cnt2 ? cnt2 : cnt1;
+            if(min<res) {
+                if(min==0) {
+                    printf("0\n");
+                    return 0;
+                }
+                res = min;
+            }
+        }
+    }
+
+    printf("%d\n", res);
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/10250.c
+++ b/code_study/Baekjoon/c/10250.c
@ -0,0 +1,17 @@
+#include <stdio.h>
+
+int main() {
+    int T;
+    scanf("%d",&T);
+    while(T--) {
+        int H, W, N, floor, number, isMulti;
+        scanf("%d %d %d",&H, &W, &N);
+        isMulti = N%H;
+        floor = isMulti ? N%H : H;
+        number = isMulti ? N/H + 1 : N/H;
+        if(number<10) printf("%d0%d\n",floor,number);
+        else printf("%d%d\n",floor,number);
+    }
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/10430.c
+++ b/code_study/Baekjoon/c/10430.c
@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main() {
+	int a, b, c;
+	scanf("%d %d %d",&a, &b, &c);
+	printf("%d %d %d %d",(a+b)%c,((a%c)+(b%c))%c,(a*b)%c,((a%c)*(b%c))%c);
+	return 0;
+}
--- a/code_study/Baekjoon/c/10757.c
+++ b/code_study/Baekjoon/c/10757.c
@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+ 
+void reverse(char arr[]) {
+	int len = strlen(arr);
+	for (int i = 0; i < len / 2; i++) {
+		char temp = arr[i];
+		arr[i] = arr[len - i - 1];
+		arr[len - i - 1] = temp;
+	}
+}
+ 
+int main(void) {
+	char A[10002] = { 0 }, B[10002] = { 0 }, res[10003] = { 0 };
+	int carry = 0;
+ 
+	scanf("%s %s", A, B);
+	reverse(A);
+	reverse(B);
+
+	int len = strlen(A) > strlen(B) ? strlen(A) : strlen(B);
+ 
+	for (int i = 0; i < len; i++) {
+		int sum = A[i] - '0' + B[i] - '0' + carry;
+
+		while (sum < 0) sum += '0';
+		if (sum > 9) carry = 1;
+		else carry = 0;
+		res[i] = sum % 10 + '0';
+	}
+
+	if (carry == 1) res[len] = '1';
+	reverse(res);
+	printf("%s", res);
+ 
+	return 0;
+}
--- a/code_study/Baekjoon/c/10775.c
+++ b/code_study/Baekjoon/c/10775.c
@ -0,0 +1,41 @@
+#include <stdio.h>
+
+#define MAX 100000
+
+int G, P, gi, res;
+int parent[MAX+1];
+
+void init_uf();
+int find(int x);
+void Union(int x);
+
+int main() {
+    scanf("%d %d", &G, &P);
+    init_uf();
+
+    for(int i=0; i<P; i++) {
+        scanf("%d",&gi);
+        
+        if(find(gi) == 0) break;
+
+        Union(gi);
+        res++;
+    }
+
+    printf("%d\n", res);
+
+    return 0;
+}
+
+void init_uf() {
+    for(int i=0; i<=G; i++) parent[i] = i;
+}
+
+int find(int x) {
+    if(x != parent[x]) return parent[x] = find(parent[x]);
+    return parent[x];
+}
+
+void Union(int x) {
+    parent[find(x)] = find(x)-1;
+}
--- a/code_study/Baekjoon/c/10798.c
+++ b/code_study/Baekjoon/c/10798.c
@ -0,0 +1,28 @@
+#include <stdio.h>
+
+char arr[5][16];
+
+int main(){
+    int max_len=0, len;
+
+    for(int i=0; i<5; i++){
+        scanf("%s",arr[i]);
+        len=0;
+        for(int j=0; arr[i][j]!='\0'; j++){
+            len++;
+        }
+        if(max_len<len){
+            max_len=len;
+        }
+    }
+
+    for(int j=0; j<max_len; j++){
+        for(int i=0; i<5; i++){
+            if(arr[i][j] != '\0'){
+                printf("%c",arr[i][j]);
+            }
+        }
+    }
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/10807.c
+++ b/code_study/Baekjoon/c/10807.c
@ -0,0 +1,15 @@
+#include <stdio.h>
+int main(){
+    int arr[100];
+    int n, v, cnt=0;
+    scanf("%d",&n);
+    for(int i=0; i<n; i++){
+        scanf("%d",&arr[i]);
+    }
+    scanf("%d",&v);
+    for(int i=0; i<n; i++){
+        if(arr[i]==v) cnt++;
+    }
+    printf("%d",cnt);
+    return 0;
+}
--- a/code_study/Baekjoon/c/10808.c
+++ b/code_study/Baekjoon/c/10808.c
@ -0,0 +1,17 @@
+#include <stdio.h>
+
+int count[26];
+
+int main() {
+    char s[101];
+    scanf("%s", s);
+
+    int i=0;
+    while(s[i] !='\0') {
+        count[s[i++] - 'a']++;
+    }
+
+    for(int j=0; j<26; j++) printf("%d ",count[j]);
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/10809.c
+++ b/code_study/Baekjoon/c/10809.c
@ -0,0 +1,18 @@
+#include <stdio.h>
+int main(){
+    int arr[26] = {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1};
+    int temp=0;
+    char s[101];
+    scanf("%s",s);
+    for(int i=0; s[i]!='\0'; i++){
+        temp = (int)(s[i]-'a');
+        if(arr[temp]==-1) arr[temp]=i;
+    }
+
+    for(int i=0; i<26; i++){
+        printf("%d ",arr[i]);
+    }
+
+    return 0;
+
+}
--- a/code_study/Baekjoon/c/10810.c
+++ b/code_study/Baekjoon/c/10810.c
@ -0,0 +1,18 @@
+#include <stdio.h>
+int main(){
+    int n, m, i, j, k;
+    int arr[100]={0};
+
+    scanf("%d %d",&n, &m);
+    
+    while(m--){
+        scanf("%d %d %d",&i,&j,&k);
+        for(int x =i-1;x<j;x++){
+            arr[x] = k;
+        }
+    }
+
+    for(int t=0; t<n; t++){
+        printf("%d ",arr[t]);
+    }
+}
--- a/code_study/Baekjoon/c/10811.c
+++ b/code_study/Baekjoon/c/10811.c
@ -0,0 +1,21 @@
+#include <stdio.h>
+int main(){
+    int arr[100];
+    int m,n,x,i,j,t;
+    scanf("%d %d",&n, &m);
+
+    for(x=0; x<n; x++) arr[x] = x+1;
+
+    while(m--){
+        scanf("%d %d",&i,&j);
+        for(x=0;x<(j-i+1)/2;x++){
+            t = arr[i+x-1];
+            arr[i+x-1] = arr[j-x-1];
+            arr[j-x-1] = t;
+        }
+    }
+
+    for(x=0; x<n; x++) printf("%d ",arr[x]);
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/10813.c
+++ b/code_study/Baekjoon/c/10813.c
@ -0,0 +1,22 @@
+#include <stdio.h>
+int main(){
+    int n, m, x, y, t;
+    scanf("%d %d",&n, &m);
+
+    int arr[100];
+    for(int i=0; i<n; i++) arr[i] = i+1;
+
+    while(m--){
+        scanf("%d %d",&x, &y);
+        t = arr[x-1];
+        arr[x-1] = arr[y-1];
+        arr[y-1] = t;
+    }
+
+    for(int j=0; j<n; j++){
+        printf("%d ",arr[j]);
+    }
+
+    return 0;
+
+}
--- a/code_study/Baekjoon/c/10818.c
+++ b/code_study/Baekjoon/c/10818.c
@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <stdlib.h>
+int main(){
+    int n;
+    int min, max;
+
+    scanf("%d",&n);
+    int *arr = malloc(sizeof(int)*n);
+    
+    for(int i=0; i<n; i++){
+        scanf("%d",&arr[i]);
+    }
+
+    min = arr[0];
+    max = min;
+
+    for(int j=1; j<n; j++){
+        if (arr[j]<min) min=arr[j];
+        if (arr[j]>max) max=arr[j];
+    }
+    free(arr);
+    printf("%d %d",min, max);
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/10828.c
+++ b/code_study/Baekjoon/c/10828.c
@ -0,0 +1,60 @@
+#define _CRT_SECURE_NO_WARNINGS
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int opcodeToNum(char* opcode){
+    if(!strcmp(opcode, "push")) return 0;
+    if(!strcmp(opcode, "pop")) return 1;
+    if(!strcmp(opcode, "size")) return 2;
+    if(!strcmp(opcode, "empty")) return 3;
+    if(!strcmp(opcode, "top")) return 4;
+    return -1;
+}
+
+int main() {
+    int N;
+    scanf("%d",&N);
+    int* stack = (int*)malloc(sizeof(int)* N);
+    memset(stack,0,sizeof(int)*N);
+
+    int len = 0;
+    while(N--){
+        char str[13];
+        if (fgets(str, sizeof(str), stdin) == NULL) break;
+        if (str[0] == '\n') { N++; continue; }
+        str[strcspn(str, "\n")] = 0;
+        char *opcode = strtok(str, " ");
+        char *operend = strtok(NULL, " ");
+        int opNum = opcodeToNum(opcode);
+        int operendNum = operend ? atoi(operend) : 0;
+        
+        switch (opNum)
+        {
+        case 0:
+            stack[len] = operendNum;
+            len++;
+            break;
+        case 1:
+            if(len==0) {
+                printf("-1\n");
+            }
+            else {
+                printf("%d\n",stack[--len]);
+            }
+            break;
+        case 2:
+            printf("%d\n",len);
+            break;
+        case 3:
+            printf("%d\n", len ? 0 : 1);
+            break;
+        case 4:
+            printf("%d\n", len ? stack[len-1] : -1);
+            break;
+        }
+    }
+
+    free(stack);
+    return 0;
+}
--- a/code_study/Baekjoon/c/10830.c
+++ b/code_study/Baekjoon/c/10830.c
@ -0,0 +1,98 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+int** allocation(int N, bool input);
+void free_memory(int** arr, int N);
+void printArr(int** arr, int N);
+int** multyply(int** A, int** B, int N);
+int** product(int** arr, int N, long long B);
+
+int main() {
+    int N;
+    long long B;
+    scanf("%d %lld", &N, &B);
+    int** arr = allocation(N, true);
+    int** result = product(arr, N, B);
+
+    printArr(result, N);
+
+    free_memory(arr, N);
+    free_memory(result, N);
+
+    return 0;
+}
+
+int** allocation(int N, bool input) {
+    int** arr = (int**)malloc(sizeof(int*)*N);
+
+    for(int i=0; i<N; i++) {
+        arr[i] = (int*)malloc(sizeof(int)*N);
+
+        if(input) {
+            for(int n=0; n<N; n++) scanf("%d", &arr[i][n]);
+        }
+    }
+
+    return arr;
+}
+
+void free_memory(int** arr, int N) {
+    for(int i=0; i<N; i++) free(arr[i]);
+    free(arr);
+}
+
+void printArr(int** arr, int N) {
+    for(int i=0; i<N; i++) {
+        for(int j=0; j<N; j++) {
+            printf("%d ",arr[i][j]);
+        }
+
+        printf("\n");
+    }
+}
+
+int** multyply(int** A, int** B, int N) {
+    int** result = allocation(N, false);
+
+    for(int y=0; y<N; y++) {
+        for(int x=0; x<N; x++) {
+            result[y][x] = 0;
+
+            for(int i=0; i<N; i++) {
+                result[y][x] += A[y][i] * B[i][x];
+            }
+
+            result[y][x] %= 1000;
+        }
+    }
+
+    return result;
+}
+
+int** product(int** arr, int N, long long B) {
+    if (B==1) {
+        int** basedArr = allocation(N, false);
+        for(int y=0; y<N; y++) {
+            for(int x=0; x<N; x++) {
+                basedArr[y][x] = arr[y][x] % 1000;
+            }
+        }
+
+        return basedArr;
+    }
+
+    int** half = product(arr, N, B/2);
+    int** temp = multyply(half, half, N);
+    free_memory(half, N);
+
+    if (B%2 == 1) {
+        int** result = multyply(temp, arr, N);
+        free_memory(temp, N);
+        
+        return result;
+    }
+    else {
+        return temp;
+    }
+}
--- a/code_study/Baekjoon/c/10844.c
+++ b/code_study/Baekjoon/c/10844.c
@ -0,0 +1,39 @@
+#include <stdio.h>
+
+#define MOD 1000000000
+long long dp[101][10];
+
+int main() {
+    for (int i=1; i<10; i++) dp[1][i] = 1;
+    
+    int N;
+    scanf("%d",&N);
+
+    for (int n=1; n<N; n++) {
+        for (int num=0; num<10; num++) {
+
+            if (dp[n][num] == 0) continue;
+
+            int next_num = num - 1;
+            if (0<=next_num && next_num <=9) {
+                dp[n+1][next_num] += dp[n][num];
+                dp[n+1][next_num] %= MOD;
+            }
+
+            next_num = num + 1;
+            if (0<=next_num && next_num <=9) {
+                dp[n+1][next_num] += dp[n][num];
+                dp[n+1][next_num] %= MOD;
+            }
+        }
+    }
+
+    long long result = 0;
+    for(int i=0; i<10; i++) {
+        result += dp[N][i];
+        result %= MOD;
+    }
+    printf("%lld\n",result);
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/10845.c
+++ b/code_study/Baekjoon/c/10845.c
@ -0,0 +1,65 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int opcodeToNum(char* opcode);
+
+int main() {
+    int N;
+    scanf("%d\n",&N);
+    int queue[10000];
+    int front = 0, rear = 0, size = 0;
+
+    while(N--){
+        char opcode[6];
+        int operend;
+        scanf("%s",opcode);
+
+        switch(opcodeToNum(opcode))
+        {
+            case 0:
+            {
+                scanf("%d\n",&operend);
+                queue[rear++] = operend;
+                size++;
+                break;
+            }
+            case 1:
+            {
+                printf("%d\n", size ? queue[front++] : -1);
+                size = size ? size - 1 : 0;
+                break;
+            }
+            case 2:
+            {
+                printf("%d\n",size);
+                break;
+            }
+            case 3:
+            {
+                printf("%d\n", size ? 0 : 1);
+                break;
+            }
+            case 4:
+            {
+                printf("%d\n", size ? queue[front] : -1);
+                break;
+            }
+            case 5:
+            {
+                printf("%d\n", size ? queue[rear-1] : -1);
+            }
+        }
+    }
+    return 0;
+}
+
+int opcodeToNum(char* opcode){
+    if(!strcmp(opcode, "push")) return 0;
+    else if(!strcmp(opcode, "pop")) return 1;
+    else if(!strcmp(opcode, "size")) return 2;
+    else if(!strcmp(opcode, "empty")) return 3;
+    else if(!strcmp(opcode, "front")) return 4;
+    else if(!strcmp(opcode, "back")) return 5;
+    return -1;
+}
--- a/code_study/Baekjoon/c/1085.c
+++ b/code_study/Baekjoon/c/1085.c
@ -0,0 +1,11 @@
+#include <stdio.h>
+
+int main() {
+    int x,y,w,h,i,j;
+    scanf("%d %d %d %d",&x,&y, &w, &h);
+    i = (w-x) < x ? (w-x) : x;
+    j = (h-y) < y ? (h-y) : y;
+    printf("%d\n", i<j ? i : j);
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/10869.c
+++ b/code_study/Baekjoon/c/10869.c
@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main() {
+	int a, b;
+	scanf("%d %d",&a,&b);
+	printf("%d %d %d %d %d",a+b,a-b,a*b,a/b,a%b);
+	return 0;
+}
--- a/code_study/Baekjoon/c/10871.c
+++ b/code_study/Baekjoon/c/10871.c
@ -0,0 +1,13 @@
+#include <stdio.h>
+int main(){
+    int n,x;
+    scanf("%d %d",&n,&x);
+    int arr[10000];
+    for(int i=0; i<n; i++){
+        scanf("%d",&arr[i]);
+    }
+    for(int j=0; j<n; j++){
+        if(arr[j]<x) printf("%d ",arr[j]);
+    }
+    return 0;
+}
--- a/code_study/Baekjoon/c/10926.c
+++ b/code_study/Baekjoon/c/10926.c
@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main() {
+	char a[50];
+	scanf("%s",a);
+	printf("%s??\!",a);
+	return 0;
+}
--- a/code_study/Baekjoon/c/10950.c
+++ b/code_study/Baekjoon/c/10950.c
@ -0,0 +1,10 @@
+#include <stdio.h>
+int main(){
+	int n, a, b;
+	scanf("%d",&n);
+	for(int i=0; i<n; i++){
+		scanf("%d %d",&a, &b);
+		printf("%d\n",a+b);
+	}
+	return 0;
+}
--- a/code_study/Baekjoon/c/10951.c
+++ b/code_study/Baekjoon/c/10951.c
@ -0,0 +1,6 @@
+#include <stdio.h>
+int main(){
+	int a,b;
+	while(scanf("%d %d",&a,&b) != EOF) printf("%d\n",a+b);
+	return 0;
+}
--- a/code_study/Baekjoon/c/10952.c
+++ b/code_study/Baekjoon/c/10952.c
@ -0,0 +1,11 @@
+#include <stdio.h>
+int main(){
+	int a,b;
+	
+	while(1){
+		scanf("%d %d",&a,&b);
+		if(a==b&&a==0) break;
+		printf("%d\n",a+b);
+	}
+	return 0;
+}
--- a/code_study/Baekjoon/c/10988.c
+++ b/code_study/Baekjoon/c/10988.c
@ -0,0 +1,23 @@
+#include <stdio.h>
+
+int main(){
+    char s[101];
+    scanf("%s",s);
+    
+    int l=0;
+    for(int i=0; s[i]!='\0'; i++){
+        l++;
+    }
+
+    int flag = 1;
+    for(int i=0; i<l/2; i++){
+        if(s[i]!=s[l-i-1]){
+            flag = 0;
+            break;
+        }
+    }
+
+    printf("%d",flag);
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/10989.c
+++ b/code_study/Baekjoon/c/10989.c
@ -0,0 +1,24 @@
+#include <stdio.h>
+
+int main() {
+    int count[10000] = {0,};
+    int n, temp;
+    scanf("%d",&n);
+    for(int i=0; i<n; i++) {
+        scanf("%d",&temp);
+        count[temp-1]++;
+    }
+
+    int idx=0, cnt=0;
+    while(cnt!=n) {
+        if(count[idx]!=0) {
+            for(int i=0; i<count[idx]; i++) {
+                printf("%d\n",idx+1);
+            }
+            cnt += count[idx];
+        }
+        idx++;
+    }
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/10998.c
+++ b/code_study/Baekjoon/c/10998.c
@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int main() {
+	
+	int a, b;
+	
+	scanf("%d %d",&a, &b);
+	printf("%d",a*b);
+	
+	return 0;
+	
+}
--- a/code_study/Baekjoon/c/11005.c
+++ b/code_study/Baekjoon/c/11005.c
@ -0,0 +1,27 @@
+#include <stdio.h>
+
+int main(){
+    int B, val, i=0;
+    long int N;
+    char res[31];
+
+    scanf("%ld %d", &N, &B);
+
+    while(N!=0){
+        val = N%B;
+        N/=B;
+        if(val>9){
+            res[i]='A'+val-10;
+        }
+        else{
+            res[i]='0'+val;
+        }
+        i++;
+    }
+
+    while(i--){
+        printf("%c",res[i]);
+    }
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/11021.c
+++ b/code_study/Baekjoon/c/11021.c
@ -0,0 +1,10 @@
+#include <stdio.h>
+int main(){
+	int n, a, b;
+	scanf("%d",&n);
+	for(int i=1; i<=n; i++){
+		scanf("%d %d",&a, &b);
+		printf("Case #%d: %d\n",i,a+b);
+	}
+	return 0;
+}
--- a/code_study/Baekjoon/c/11022.c
+++ b/code_study/Baekjoon/c/11022.c
@ -0,0 +1,10 @@
+#include <stdio.h>
+int main(){
+	int n, a, b;
+	scanf("%d",&n);
+	for(int i=1; i<=n; i++){
+		scanf("%d %d",&a, &b);
+		printf("Case #%d: %d + %d = %d\n",i,a,b,a+b);
+	}
+	return 0;
+}
--- a/code_study/Baekjoon/c/11047.c
+++ b/code_study/Baekjoon/c/11047.c
@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+    int N, K;
+    scanf("%d %d",&N, &K);
+    int* coin = (int*)malloc(sizeof(int)*N);
+    for(int i=0; i<N; i++){
+        scanf("%d",&coin[i]);
+    }
+
+    int k_diff = K, count = 0;
+    for(int i=N-1; i>=0; i--){
+        if(coin[i]<=k_diff){
+            count += k_diff/coin[i];
+            k_diff = k_diff%coin[i];
+        }
+    }
+    printf("%d\n",count);
+
+    free(coin);    
+    return 0;
+}
--- a/code_study/Baekjoon/c/11049.c
+++ b/code_study/Baekjoon/c/11049.c
@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <limits.h>
+
+#define MAX INT_MAX
+
+int size[501][2];
+int dp[501][501];
+
+int min(int a, int b) { return a>b ? b : a; }
+
+int main() {
+    int N;
+    scanf("%d",&N);
+
+    for(int i=1; i<=N; i++) scanf("%d %d",&size[i][0], &size[i][1]);
+
+    for(int len=1; len<N; len++) {
+        for(int i=1; i<=N-len; i++) {
+            int j = i + len;
+            dp[i][j] = MAX;
+
+            for(int k=i; k<j; k++) {
+                int left_times = dp[i][k];
+                int right_times = dp[k+1][j];
+                int operator_count = size[i][0] * size[k][1] * size[j][1];
+                dp[i][j] = min(dp[i][j], left_times + right_times + operator_count);
+            }
+        }
+    }
+
+    printf("%d\n",dp[1][N]);
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/11050.c
+++ b/code_study/Baekjoon/c/11050.c
@ -0,0 +1,15 @@
+#include <stdio.h>
+
+int main() {
+    int n, k, result=1, factR=1;
+    scanf("%d %d", &n, &k);
+    
+    for(int i=1; i<=k; i++) {
+        result *= n-i+1;
+        factR *= i;
+    }
+
+    printf("%d\n",result/factR);
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/11053.c
+++ b/code_study/Baekjoon/c/11053.c
@ -0,0 +1,30 @@
+#include <stdio.h>
+
+#define MAX 1000
+
+int A[MAX], dp[MAX];
+int N, ans;
+
+int max(int a, int b) {
+    return a > b ? a : b;
+}
+
+int main() {
+    scanf("%d", &N);
+    for(int i=0; i<N; i++) {
+        scanf("%d",&A[i]);
+        dp[i] = 1;
+    }
+
+    for(int i=1; i<N; i++) {
+        for(int j=0; j<i; j++) {
+            if(A[i] > A[j]) dp[i] = max(dp[i], dp[j] + 1);
+        }
+    }
+
+    for(int i=0; i<N; i++) ans = max(dp[i], ans);
+
+    printf("%d\n", ans);
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/11054.c
+++ b/code_study/Baekjoon/c/11054.c
@ -0,0 +1,56 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+void freeAll(int* a, int* b, int* c, int* d, int* e) {
+    free(a); free(b); free(c); free(d); free(e);
+}
+
+int max(int a, int b) {
+    return a>b ? a : b;
+}
+
+int maxInArr(int* arr, int N) {
+    int maxNum = 0;
+    for(int i=0; i<N; i++) maxNum = max(maxNum, arr[i]);
+
+    return maxNum;
+}
+
+int main() {
+    int N;
+    scanf("%d",&N);
+
+    int* arr = (int*)malloc(sizeof(int)*N);
+    int* arrR = (int*)malloc(sizeof(int)*N);
+    for(int i=0; i<N; i++) {
+        int num;
+        scanf("%d",&num);
+        arr[i] = num;
+        arrR[N-i-1] = num;
+    }
+
+    int* dp = (int*)malloc(sizeof(int)*N);
+    int* dpR = (int*)malloc(sizeof(int)*N);
+
+    for(int i=0; i<N; i++) {
+        dp[i] = 1;
+        dpR[i] = 1;
+    }
+
+    for(int i=0; i<N; i++) {
+        for(int j=0; j<i; j++) {
+            if(arr[i] > arr[j]) dp[i] = max(dp[i], dp[j]+1);
+            if(arrR[i] > arrR[j]) dpR[i] = max(dpR[i], dpR[j]+1);
+        }
+    }
+
+    int* length = (int*)malloc(sizeof(int)*N);
+
+    for(int i=0; i<N; i++) length[i] = dp[i] + dpR[N-1-i] - 1;
+
+    printf("%d\n", maxInArr(length, N));
+
+    freeAll(arr, arrR, dp, dpR, length);
+    return 0;
+}
--- a/code_study/Baekjoon/c/1106.c
+++ b/code_study/Baekjoon/c/1106.c
@ -0,0 +1,31 @@
+#include <stdio.h>
+
+#define MAX_COST 100000 
+
+int min(int a, int b) {
+    return a > b ? b : a;
+}
+
+int dp[1101];
+
+int main() {
+    int C, N;
+    scanf("%d %d",&C, &N);
+
+    dp[0] = 0;
+    for(int i=1; i<=C+100; i++) dp[i] = MAX_COST;
+
+    while(N--) {
+        int cost, man;
+        scanf("%d %d",&cost, &man);
+
+        for(int c=man; c<C+101; c++) dp[c] = min(dp[c], dp[c-man] + cost);
+    }
+
+    int ans = MAX_COST;
+    for(int i=C; i<C+101; i++) ans = min(ans, dp[i]);
+
+    printf("%d\n",ans);
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/11286.c
+++ b/code_study/Baekjoon/c/11286.c
@ -0,0 +1,73 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void swap(int *a, int *b);
+void insert(int value, int *heap, int* size);
+void delete(int *heap, int* size);
+
+int main(){
+    int N;
+    scanf("%d",&N);
+    int *heap = (int*)malloc(sizeof(int)*(N+1));
+    int heap_size = 0;
+    while(N--){
+        int op;
+        scanf("%d",&op);
+        if(op==0) delete(heap, &heap_size);
+        else insert(op, heap, &heap_size);
+    }
+
+    free(heap);
+    return 0;
+}
+
+void swap(int *a, int *b){
+    int temp = *a;
+    *a = *b;
+    *b = temp;
+}
+
+void insert(int value, int *heap, int* size){
+    heap[++(*size)] = value;
+    int current = *size;
+    while(current != 1){
+        if((abs(heap[current]) < abs(heap[current/2]) ||
+            (abs(heap[current]) == abs(heap[current/2]) && heap[current]<heap[current/2]))){
+            swap(&heap[current], &heap[current/2]);
+            current /= 2;
+        }
+        else {
+            break;
+        }
+    }
+}
+
+void delete(int *heap, int* size){
+    if(*size==0){
+        printf("0\n");
+        return;
+    }
+
+    printf("%d\n",heap[1]);
+    heap[1] = heap[(*size)--];
+
+    int current = 1;
+    while (current * 2 <= *size) {
+        int child = current * 2;
+
+        if (child + 1 <= *size && 
+            ((abs(heap[child + 1]) < abs(heap[child])) || 
+             (abs(heap[child + 1]) == abs(heap[child]) && heap[child + 1] < heap[child]))) {
+            child++;
+        }
+
+        if ((abs(heap[child]) < abs(heap[current])) || 
+            (abs(heap[child]) == abs(heap[current]) && heap[child] < heap[current])) {
+            swap(&heap[current], &heap[child]);
+            current = child;
+        }
+        else {
+            break;
+        }
+    }
+}
--- a/code_study/Baekjoon/c/11382.c
+++ b/code_study/Baekjoon/c/11382.c
@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main() {
+	long int a, b, c;
+	scanf("%ld %ld %ld",&a, &b, &c);
+	printf("%ld",a+b+c);
+	return 0;
+}
--- a/code_study/Baekjoon/c/11444.c
+++ b/code_study/Baekjoon/c/11444.c
@ -0,0 +1,71 @@
+#include <stdio.h>
+// Fn      | 1 1 | ^n-1 F1(1)
+// Fn-1    | 1 0 |      F0(0)
+
+#define MOD 1000000007
+
+typedef long long matrix[2][2];
+
+void multyply_matrix(matrix A, matrix B, matrix result);
+void power_matrix(matrix A, long long exp, matrix result);
+
+int main() {
+    long long n;
+    scanf("%lld", &n);
+
+    if (n <= 1) {
+        printf("%lld\n", n);
+        return 0;
+    }
+
+    matrix A = {{1, 1}, {1, 0}};
+    matrix result_matrix;
+
+    power_matrix(A, n - 1, result_matrix);
+
+    printf("%lld\n", result_matrix[0][0]);
+
+    return 0;
+}
+
+void multyply_matrix(matrix A, matrix B, matrix result) {
+    matrix temp;
+    temp[0][0] = (A[0][0] * B[0][0] + A[0][1] * B[1][0]) % MOD;
+    temp[0][1] = (A[0][0] * B[0][1] + A[0][1] * B[1][1]) % MOD;
+    temp[1][0] = (A[1][0] * B[0][0] + A[1][1] * B[1][0]) % MOD;
+    temp[1][1] = (A[1][0] * B[0][1] + A[1][1] * B[1][1]) % MOD;
+    
+    result[0][0] = temp[0][0];
+    result[0][1] = temp[0][1];
+    result[1][0] = temp[1][0];
+    result[1][1] = temp[1][1];
+}
+
+void power_matrix(matrix A, long long exp, matrix result) {
+    if (exp == 0) {
+        result[0][0] = 1; result[0][1] = 0;
+        result[1][0] = 0; result[1][1] = 1;
+        return;
+    }
+
+    if (exp == 1) {
+        result[0][0] = A[0][0]; result[0][1] = A[0][1];
+        result[1][0] = A[1][0]; result[1][1] = A[1][1];
+        return;
+    }
+
+    matrix half;
+    power_matrix(A, exp / 2, half);
+
+    matrix temp;
+    multyply_matrix(half, half, temp);
+
+    if (exp % 2 == 1) {
+        multyply_matrix(temp, A, result);
+    } else {
+        result[0][0] = temp[0][0];
+        result[0][1] = temp[0][1];
+        result[1][0] = temp[1][0];
+        result[1][1] = temp[1][1];
+    }
+}
--- a/code_study/Baekjoon/c/1152.c
+++ b/code_study/Baekjoon/c/1152.c
@ -0,0 +1,19 @@
+#include <stdio.h>
+
+int main(){
+    char s[1000001];
+    scanf("%[^\n]",s);
+
+    int n=0;
+
+    if(s[0]!=' ') n=1;
+
+    for(int i=0; s[i+1]!='\0'; i++){
+        if((s[i]==' ') && (s[i+1]!=' ')) n++;
+    }
+
+    printf("%d",n);
+
+    return 0;
+
+}
--- a/code_study/Baekjoon/c/1157.c
+++ b/code_study/Baekjoon/c/1157.c
@ -0,0 +1,32 @@
+#include <stdio.h>
+
+int main(){
+    int arr[26] = {};
+    char s[1000001];
+
+    scanf("%s",s);
+
+    for(int i=0; s[i]!='\0'; i++){
+        if(s[i] >= 'a' && s[i] <= 'z'){
+            s[i]=s[i]-32;
+        }
+        arr[s[i]-'A']++;
+    }
+
+    int max_idx=0, max=0, dup;
+
+    for(int i=0; i<26; i++){
+        if(arr[i]>max){
+            max=arr[i];
+            max_idx=i;
+            dup=0;
+        } else if(arr[i]==max && max!=0){
+            dup=1;
+        }
+    }
+
+    printf("%c", !dup ? 'A'+max_idx : '?');
+
+    return 0;
+
+}
--- a/code_study/Baekjoon/c/11653.c
+++ b/code_study/Baekjoon/c/11653.c
@ -0,0 +1,19 @@
+#include <stdio.h>
+
+int main() {
+    int N;
+    scanf("%d",&N);
+
+    int v=2;
+    while(v<=N) {
+        if(N%v==0) {
+            printf("%d\n",v);
+            N/=v;
+        }
+        else {
+            v++;
+        }
+    }
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/11654.c
+++ b/code_study/Baekjoon/c/11654.c
@ -0,0 +1,7 @@
+#include <stdio.h>
+int main(){
+    char c;
+    c = getchar();
+    printf("%d",c);
+    return 0;
+}
--- a/code_study/Baekjoon/c/11659.c
+++ b/code_study/Baekjoon/c/11659.c
@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+    int N, M;
+    scanf("%d %d",&N, &M);
+    int* accSum = (int*)malloc(sizeof(int)*(N+1));
+    accSum[0] = 0;
+    for(int i=1; i<=N; i++){
+        int n;
+        scanf("%d",&n);
+        accSum[i] += accSum[i-1] + n;
+    }
+
+    while(M--){
+        int a, b;
+        scanf("%d %d",&a, &b);
+        printf("%d\n",accSum[b]-accSum[a-1]);
+    }
+
+    free(accSum);
+
+    return 0;
+}
--- a/code_study/Baekjoon/c/11660.c
+++ b/code_study/Baekjoon/c/11660.c
@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+    int N, M;
+    scanf("%d %d",&N, &M);
+    int** dp = (int**)malloc(sizeof(int*)*(N+1));
+    for(int i=0; i<=N; i++) dp[i] = (int*)malloc(sizeof(int)*(N+1));
+
+    for(int x=0; x<=N; x++) {
+        for(int y=0; y<=N; y++) {
+            if (x==0 || y==0) {
+                dp[x][y] = 0;
+                continue;
+            }
+            int num;
+            scanf("%d",&num);
+            dp[x][y] = dp[x-1][y] + dp[x][y-1] - dp[x-1][y-1] + num;
+        }
+    }
+
+    while(M--) {
+        int x1, y1, x2, y2;
+        scanf("%d %d %d %d", &x1, &y1, &x2, &y2);
+        printf("%d\n",dp[x2][y2] - dp[x2][y1-1] - dp[x1-1][y2] + dp[x1-1][y1-1]);
+    }
+
+    for(int i=0; i<=N; i++) free(dp[i]);
+    free(dp);
+    return 0;
+}
--- a/code_study/Baekjoon/c/1167.c
+++ b/code_study/Baekjoon/c/1167.c
@ -0,0 +1,97 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+typedef struct Edge {
+    int to;
+    int weight;
+    struct Edge* next;
+} edge;
+
+typedef struct {
+    int now;
+    int distance;
+} tuple;
+
+void add_edge(edge** graph, int u, int v, int w);
+tuple find_maxLength_node(int start, edge** graph, int v);
+
+int main() {
+    int V;
+    scanf("%d",&V);
+
+    edge** graph = (edge**)malloc(sizeof(edge*)*(V+1));
+
+    for(int i=0; i<V; i++) {
+        int u;
+        scanf("%d",&u);
+        graph[u] = NULL;
+
+        while(1) {
+            int v;
+            scanf("%d",&v);
+            if(v==-1) break;
+
+            int w;
+            scanf("%d",&w);
+
+            add_edge(graph,u,v,w);
+        }
+    }
+
+    int start = find_maxLength_node(1, graph, V).now;
+    int radius = find_maxLength_node(start, graph, V).distance;
+    printf("%d\n",radius);
+
+
+
+    for(int i = 1; i <= V; i++) {
+        edge* ptr = graph[i];
+        while(ptr != NULL) {
+            edge* temp = ptr;
+            ptr = ptr->next;
+            free(temp);
+        }
+    }
+
+    free(graph);
+    return 0;
+}
+
+void add_edge(edge** graph, int u, int v, int w) {
+    edge* new_edge = (edge*)malloc(sizeof(edge));
+    new_edge -> to = v;
+    new_edge -> weight = w;
+    new_edge -> next = graph[u];
+    graph[u] = new_edge;
+}
+
+tuple find_maxLength_node(int start, edge** graph, int v) {
+    tuple result = {start, 0};
+    bool* visited = (bool*)calloc(v+1,sizeof(bool));
+    tuple* stack = (tuple*)malloc(sizeof(tuple)*v);
+    int top = -1;
+
+    stack[++top] = result;
+    visited[start] = true;
+
+    while(top != -1) {
+        tuple current = stack[top--];
+
+        if(result.distance < current.distance) result = current;
+
+        edge* ptr = graph[current.now];
+        while(ptr != NULL) {
+            if(!visited[ptr->to]) {
+                tuple next = {ptr->to, ptr->weight + current.distance};
+                stack[++top] = next;
+                visited[ptr->to] = true;
+            }
+            ptr = ptr -> next;
+        }
+    }
+
+    free(visited);
+    free(stack);
+    return result;
+}
--- a/code_study/Baekjoon/c/11718.c
+++ b/code_study/Baekjoon/c/11718.c
@ -0,0 +1,9 @@
+#include <stdio.h>
+
+int main(){
+    char s;
+    while(scanf("%c",&s)!= EOF){
+        printf("%c",s);
+    }
+    return 0;
+}
--- a/code_study/Baekjoon/c/11720.c
+++ b/code_study/Baekjoon/c/11720.c
@ -0,0 +1,12 @@
+#include <stdio.h>
+int main(){
+    int n, sum=0;
+    char s[101];
+    scanf("%d",&n);
+    scanf("%s",s);
+    for(int i=0; i<n; i++){
+        sum += (int)(s[i]-'0');
+    }
+    printf("%d",sum);
+    return 0;
+}
--- a/code_study/Baekjoon/c/11723.c
+++ b/code_study/Baekjoon/c/11723.c
@ -0,0 +1,34 @@
+#define _CRT_SECURE_NO_WARNINGS
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+int main() {
+    int set = 0;
+    int N;
+    scanf("%d",&N);
+    getchar();
+    while(N--) {
+        char str[20];
+        if (fgets(str, sizeof(str), stdin) == NULL) break;
+        if (str[0] == '\n') { N++; continue; }
+        str[strcspn(str, "\n")] = 0;
+        char *opcode = strtok(str, " ");
+        char *operend = strtok(NULL, " ");
+        
+        if(!strcmp(opcode, "add")) {
+            set |= 1 << (atoi(operend)-1);
+        } else if(!strcmp(opcode, "remove")) {
+            set &= ~(1 << (atoi(operend)-1));
+        } else if(!strcmp(opcode, "check")) {
+            printf("%d\n",set & (1 << (atoi(operend)-1)) ? 1 : 0);
+        } else if(!strcmp(opcode, "toggle")) {
+            set ^= 1 << (atoi(operend)-1);
+        } else if(!strcmp(opcode, "all")) {
+            set = (1<<20) - 1;
+        } else if(!strcmp(opcode, "empty")) {
+            set = 0;
+        }
+    }
+    return 0;
+}
--- a/code_study/Baekjoon/c/11866.c
+++ b/code_study/Baekjoon/c/11866.c
@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int nextIndex(int current_idx, int* arr, int n, int k);
+
+int main() {
+    int n, k;
+    scanf("%d %d",&n, &k);
+    int* list = (int*)malloc(sizeof(int)*(n+1));
+    for(int i=0; i<=n; i++) {
+        list[i] = i;
+    }
+
+    printf("<");
+    int len = n, current_idx=1;
+    while(len!=0) {
+        current_idx = nextIndex(current_idx, list, n, len==n ? k-1 : k);
+        if(len==1) printf("%d>\n", list[current_idx]);
+        else printf("%d, ",list[current_idx]);
+        list[current_idx] = 0;
+        len--;
+    }
+    free(list);
+    return 0;
+}
+
+int nextIndex(int current_idx, int* arr, int n, int k){
+    while(k--){
+        do{
+            if(current_idx==n) current_idx = 1;
+            else current_idx++;
+        }while(arr[current_idx]==0);
+    }
+    return current_idx;
+}
--- a/code_study/Baekjoon/c/1193.c
+++ b/code_study/Baekjoon/c/1193.c
@ -0,0 +1,26 @@
+#include <stdio.h>
+
+int main(){
+    int X;
+    scanf("%d",&X);
+
+    int line=1, line_max=1, denum;
+    do{
+        if(X>line_max){
+            line_max+=line+1;
+        }
+        else{
+            if(line%2){
+                denum = line-(line_max-X);
+            }
+            else{
+                denum = line_max-X+1;
+            }
+            printf("%d/%d",line-denum+1, denum);
+            break;
+        }
+    }while(line++);
+
+    return 0;
+    
+}
--- a/code_study/Baekjoon/c/11945.c
+++ b/code_study/Baekjoon/c/11945.c
@ -0,0 +1,17 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+    int N, M;
+    scanf("%d %d", &N, &M);
+    
+    char* line = (char*)malloc(sizeof(char)*(M+1));
+    while(N--) {
+        scanf("%s",line);
+        for(int i=M-1; i>=0; i--) printf("%c",line[i]);
+        printf("\n");
+    }
+
+    free(line);
+    return 0;
+}
--- a/Show More
+++ b/Show More