Submission #1198439

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198439		aykhn	Bigger segments (IZhO19_segments)	C++20	0 / 100	0 ms	584 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;

int dp[MXN][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);
  };
  for (int i = 0; i <= n; i++) for (int j = 0; j <= n; j++) dp[i][j] = inf;
  dp[0][0] = 0;
  for (int i = 1; i <= n; i++)
  {
    for (int j = 1; j <= i; j++)
    {
      for (int k = 1; k <= i; k++)
      {
        if (dp[k - 1][j - 1] <= sum(k, i)) dp[i][j] = min(dp[i][j], sum(k, i));
      }
      if (dp[i][j] < inf && j > 2) 
      {
        assert(dp[i][j] - dp[i][j - 1] >= dp[i][j - 1] - dp[i][j - 2]);
      }
    }
  }
  for (int i = n; i >= 1; i--)
  {
    if (dp[n][i] < inf) 
    {
      cout << i << '\n';
      return;
    }
  }
}

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

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