제출 #586070

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
586070		MilosMilutinovic	Cigle (COI21_cigle)	C++14	48 / 100	1085 ms	98692 KiB

cigle

/**
 *    author:  wxhtzdy
 *    created: 29.06.2022 21:43:16
**/
#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);  
  int n;
  cin >> n;
  vector<int> a(n);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  vector<long long> pref(n + 1);
  for (int i = 0; i < n; i++) {
    pref[i + 1] = pref[i] + a[i];
  }
  vector<vector<int>> dp(n + 1, vector<int>(n + 1));
  for (int l = 1; l <= n; l++) {
    map<long long, int> cnt;
    for (int r = l; r <= n; r++) {
      int ft = 0;
      for (int i = l - 1; i >= 1; i--) {
        dp[l][r] = max(dp[l][r], dp[i][l - 1] + ft);
        if (cnt.count(pref[l - 1] - pref[i - 1])) {
          ft += 1;  
        }
      }
      cnt[pref[r] - pref[l - 1]]++;
    }
  }
  int ans = 0;
  for (int i = 1; i <= n; i++) {
    ans = max(ans, dp[i][n]);
  }              
  cout << ans << '\n';
  return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 11 / 11
• Subtask 3: 13 / 13
• Subtask 4: 15 / 15
• Subtask 5: 0 / 52