Submission #1198445

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198445		aykhn	Bigger segments (IZhO19_segments)	C++20	37 / 100	95 ms	2196 KiB

segments

#include <bits/stdc++.h>

using namespace std;

#define int long long
#define inf 0x3F3F3F3F3F3F3F3F

const int MXN = 3e3 + 5;
const int mod = 1e9 + 7;

array<int, 2> dp[MXN];

void _()
{
  int n;
  cin >> n;
  int a[n + 1], p[n + 1];
  for (int i = 1; i <= n; i++) cin >> a[i];
  p[0] = 0;
  for (int i = 1; i <= n; i++) p[i] = (i ? p[i - 1] : 0) + a[i];
  auto sum = [&](int l, int r)
  {
    if (l > r) return 0LL;
    return p[r] - (l ? p[l - 1] : 0LL);
  };
  dp[0] = {0, 0};
  for (int i = 1; i <= n; i++)
  {
    for (int j = 1; j <= i; j++)
    {
      if (dp[j - 1][1] <= sum(j, i) && dp[j - 1][0] + 1 >= dp[i][0]) dp[i] = {dp[j - 1][0] + 1, sum(j, i)};
    }
  }
  cout << dp[n][0] << '\n';
}

signed main()
{
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int t = 1;
  // cin >> t;
  while (t--) _();
}

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