20250714 baekjoon

code_study/Baekjoon/java/_2579.java

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+import java.util.*;
+
+public class _2579{
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int N = sc.nextInt();
+        int[] stair = new int[N+1];
+        for(int i=1; i<=N; i++){
+            stair[i] = sc.nextInt();
+        }
+
+        int[] dp = new int[N+1];
+        
+        switch (N) {
+            case 1:
+                System.out.println(stair[1]);
+                break;
+
+            case 2:
+                System.out.println(stair[1]+stair[2]);
+                break;
+
+            case 3:
+                System.out.println(Math.max(stair[1] + stair[3], stair[2] + stair[3]));
+                break;
+        
+            default:
+                dp[1] = stair[1];
+                dp[2] = stair[1] + stair[2];
+                dp[3] = Math.max(stair[1] + stair[3], stair[2] + stair[3]);
+                for(int i=4; i<=N; i++){
+                    dp[i] = Math.max(dp[i-2] + stair[i], dp[i-3] + stair[i-1] + stair[i]);
+                }
+                System.out.println(dp[N]);
+                break;
+        }
+
+        sc.close();
+    }
+}

code_study/Baekjoon/python/1463.py

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+maxValue = 10**6
+N = int(input())
+dp = [0]*(N+1)
+for i in range(2,N+1):
+    dp[i] = min(
+        dp[i-1]+1,
+        dp[i//2]+1 if i%2==0 else maxValue,
+        dp[i//3]+1 if i%3==0 else maxValue
+    )
+print(dp[N])

code_study/Baekjoon/ts/2579.ts

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+export {};
+
+const input: number[] = require("fs").readFileSync(0,"utf8").toString().trim().split('\n').map(Number);
+const N:number = input[0];
+if(N<=3){
+    console.log(N===1 ? input[1] : N===2 ? input[1]+input[2] : Math.max(input[1]+input[3], input[2]+input[3]));
+}
+else{
+    let score: number[] = new Array(N+1).fill(0);
+    score[1] = input[1];
+    score[2] = input[1]+input[2];
+    score[3] = Math.max(input[1]+input[3], input[2]+input[3]);
+    score.forEach((_,i,arr) => {
+        if(i>3){
+            arr[i] = Math.max(arr[i-2]+input[i], arr[i-3] + input[i-1] + input[i]);
+        }
+    });
+    console.log(score[N]);
+}