Merge remote-tracking branch 'origin/main'

Author: jihostudy

박예진/2주차/260107.cpp

@@ -0,0 +1,49 @@
+//https://www.acmicpc.net/submit/2240/97116669
+
+#include <iostream>
+#include <vector>
+#include <algorithm>
+#include <cstring>
+using namespace std;
+
+int T, W;
+int dp[1001][31][2]; // 시간, 움직인 횟수, idx
+vector<int> tree;
+
+int dfs(int depth, int cnt, int idx) {
+  // 기저 조건
+  if (depth == T) return 0;
+  if (cnt < 0) return -1e9; // 불가능한 조건
+
+  // 메모이제이션
+  int &res = dp[depth][cnt][idx];
+  if (res != -1) return res;
+
+  // 로직
+  int move = dfs(depth + 1, cnt - 1, idx ^ 1); // 움직
+  int nomove = dfs(depth + 1, cnt, idx); // 안움직
+  res = max(move, nomove) + (idx == tree[depth] - 1);
+
+  return res;
+}
+
+int main() {
+  ios::sync_with_stdio(false);
+  cin.tie(0); cout.tie(0);
+
+  cin >> T >> W;
+  tree.resize(T);
+  for(int i = 0; i < T; i++){
+    cin >> tree[i];
+  }
+  // 초기화
+  memset(dp, -1, sizeof(dp));
+
+  // 움직, 안 움직
+  int move = dfs(0, W - 1, 1);
+  int nomove = dfs(0, W, 0);
+
+  cout << max(move, nomove);
+  
+  return 0;
+}