Submission #469047

#	Time	Username	Problem	Language	Result	Execution time	Memory
469047		flashmt	Aliens (IOI16_aliens)	C++17	0 / 100	1 ms	204 KiB

aliens

#include <bits/stdc++.h>
using namespace std;
const long long oo = 1LL << 60;

long long take_photos(int n, int m, int k, vector<int> r, vector<int> c)
{
  vector<int> id(n);
  for (int i = 0; i < n; i++)
  {
    if (r[i] > c[i])
      swap(r[i], c[i]);
    id[i] = i;
  }
  sort(begin(id), end(id), [&](int u, int v) { return r[u] + c[u] < r[v] + c[v]; });

  vector<vector<long long>> f(n + 1, vector<long long>(n + 1, oo));
  f[0][0] = 0;
  for (int i = 1; i <= k; i++)
    for (int j = 1; j <= n; j++)
    {
      f[i][j] = oo;
      int minX = n, maxY = -1;
      for (int jj = j - 1; jj >= 0; jj--)
      {
        minX = min(minX, r[id[jj]]);
        maxY = max(maxY, c[id[jj]]);
        int area = (maxY - minX + 1LL) * (maxY - minX + 1);
        f[i][j] = min(f[i][j], f[i - 1][jj] + area);
      }
    }

  long long ans = oo;
  for (int i = 1; i <= k; i++)
    ans = min(ans, f[i][n]);
  return ans;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 12
• Subtask 3: 0 / 9
• Subtask 4: 0 / 16
• Subtask 5: 0 / 19
• Subtask 6: 0 / 40