From 96c620e88ef419d2dd3e19fb4ea9c1807585a4b9 Mon Sep 17 00:00:00 2001
From: songyc macbook <gitea@gitea>
Date: Fri, 20 Mar 2026 22:40:39 +0900
Subject: [PATCH] baekjoon 20260320

---
 code_study/Baekjoon/python/1005.py   | 33 +++++++++++---------
 code_study/Baekjoon/python/1005_2.py | 46 +++++++++++++++-------------
 code_study/Baekjoon/python/2902.py   |  1 +
 3 files changed, 43 insertions(+), 37 deletions(-)
 create mode 100644 code_study/Baekjoon/python/2902.py

diff --git a/code_study/Baekjoon/python/1005.py b/code_study/Baekjoon/python/1005.py
index 188666c..7ea583a 100644
--- a/code_study/Baekjoon/python/1005.py
+++ b/code_study/Baekjoon/python/1005.py
@@ -2,28 +2,31 @@ import sys
 sys.setrecursionlimit(10**6)
 input = sys.stdin.readline
 
+ans = []
+
 for _ in range(int(input())) :
     N, K = map(int, input().split())
+    bt = [0] + list(map(int, input().split()))
     
-    build_time = [0] + list(map(int, input().split()))
-    
-    build_info = [[] for _ in range(N+1)]
+    prev_build = [[] for _ in range(N+1)]
     for _ in range(K) :
         x, y = map(int, input().split())
-        build_info[y].append(x)
-        
-    W = int(input())
+        prev_build[y].append(x)
     
+    W = int(input())
     dp = [-1]*(N+1)
     
-    def solve(target) :
-        if dp[target] == -1 :
-            max_build_time = 0
-            for prev in build_info[target] :
-                max_build_time = max(max_build_time, solve(prev))
+    def build(n) :
+        if dp[n] == -1 :
+            prev_time = 0
+            
+            for prev in prev_build[n] :
+                prev_time = max(prev_time, build(prev))
+            
+            dp[n] = prev_time + bt[n]
         
-            dp[target] = max_build_time + build_time[target]
-        
-        return dp[target]
+        return dp[n]
     
-    print(solve(W))
\ No newline at end of file
+    ans.append(build(W))
+
+print("\n".join(map(str, ans)))
\ No newline at end of file
diff --git a/code_study/Baekjoon/python/1005_2.py b/code_study/Baekjoon/python/1005_2.py
index 1919849..9d0befd 100644
--- a/code_study/Baekjoon/python/1005_2.py
+++ b/code_study/Baekjoon/python/1005_2.py
@@ -2,43 +2,45 @@ from collections import deque
 import sys
 input = sys.stdin.readline
 
-ans = []
-T = int(input())
-
-for _ in range(T) :
+def solve() :
     N, K = map(int, input().split())
-    
-    build_info = [[] for _ in range(N+1)]
-    dp = [-1]*(N+1)
     build_time = [0] + list(map(int, input().split()))
+    
+    graph = [[] for _ in range(N+1)]
     indegree = [0]*(N+1)
-    
     for _ in range(K) :
-        u, v = map(int, input().split())
-        build_info[u].append(v)
-        indegree[v] += 1
-    
-    W = int(input())
+        x, y = map(int, input().split())
+        graph[x].append(y)
+        indegree[y] += 1
     
     qu = deque()
+    dp = [0]*(N+1)
     
     for i in range(1, N+1) :
         if indegree[i] == 0 :
             qu.append(i)
             dp[i] = build_time[i]
     
+    W = int(input())
+    
     while qu :
         now = qu.popleft()
+        
         if now == W :
             break
-
-        for next in build_info[now] :
-            dp[next] = max(dp[next], dp[now] + build_time[next])
+        
+        for nxt in graph[now] :
+            dp[nxt] = max(dp[nxt], dp[now] + build_time[nxt])
             
-            indegree[next] -= 1
-            if indegree[next] == 0 :
-                qu.append(next)
-    
-    ans.append(str(dp[W]))
+            indegree[nxt] -= 1
+            if indegree[nxt] == 0 :
+                qu.append(nxt)
+                
+    return dp[W]
 
-print('\n'.join(ans))
\ No newline at end of file
+ans = []
+
+for _ in range(int(input())) :
+    ans.append(solve())
+
+print("\n".join(map(str, ans)))
\ No newline at end of file
diff --git a/code_study/Baekjoon/python/2902.py b/code_study/Baekjoon/python/2902.py
new file mode 100644
index 0000000..7690b1e
--- /dev/null
+++ b/code_study/Baekjoon/python/2902.py
@@ -0,0 +1 @@
+print("".join(s[0] for s in input().split("-")))
\ No newline at end of file