Submission #344754

#	Time	Username	Problem	Language	Result	Execution time	Memory
344754		tata666	Bigger segments (IZhO19_segments)	C++17	13 / 100	780 ms	262148 KiB

segments

#include <bits/stdc++.h>

#define pb push_back
#define F first
#define S second

using namespace std;

typedef long long llong;

const int MOD = 1e9 + 7;
const int MXN = 4e5 + 7;
const llong INF = 1e18 + 7;

int n, dp[5011][5011], ans;
llong a[MXN], pref[MXN];
vector <int> pos[5011];

int main(){
  ios_base::sync_with_stdio(0);
  //freopen("input.txt", "r", stdin);
  //freopen("output.txt", "w", stdout);
  cin >> n;
  for(int i = 1; i <= n; i++){
    cin >> a[i];
    pref[i] = pref[i - 1] + a[i];
    dp[1][i] = 1;
    pos[i].pb(1);
  }
  for(int i = 1; i <= n; i++){
    for(int j : pos[i]){
      for(int k = 1; k <= n; k++){
        if(pref[i] - pref[j - 1] <= pref[k] - pref[i]){
          dp[i + 1][k] = max(dp[i + 1][k], dp[j][i] + 1);
          if(k < n) pos[k].pb(i + 1);
        }
      }
    }
    pos[i].clear();
  }
  for(int i = 1; i <= n; i++){
    ans = max(ans, dp[i][n]);
  }
  cout << ans;
  return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 0 / 14
• Subtask 3: 0 / 10
• Subtask 4: 0 / 36
• Subtask 5: 0 / 27