Submission #1207978

#	Time	Username	Problem	Language	Result	Execution time	Memory
1207978		d4xn	Bigger segments (IZhO19_segments)	C++17	0 / 100	0 ms	320 KiB

segments

#include <bits/stdc++.h>
using namespace std;

#define int long long

const int N = 5e5;

int n, a[N], pre[N];
pair<int, int> dp[N];

signed main() {
  ios::sync_with_stdio(false); cin.tie(nullptr);

  cin >> n;
  a[0] = pre[0] = 0;
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
    pre[i] = a[i] + pre[i-1];
    dp[i] = make_pair(0, 69);
  }

  int r = 0;

  dp[0] = make_pair(1, -a[0]);
  for (int i = 0; i+1 < n; i++) {  
    // no hago grupo nuevo
    dp[i+1] = max(dp[i+1], make_pair(dp[i].first, dp[i].second - a[i+1]));

    // hago grupo nuevo
    while (r < n && pre[r] - pre[i] < -dp[i].second) r++;
    if (r < n) dp[r] = max(dp[r], make_pair(dp[i].first + 1, -(pre[r] - pre[i])));
  }

  cout << dp[n-1].first << "\n";
}

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