Submission #206777

#	Time	Username	Problem	Language	Result	Execution time	Memory
206777		MrDomino	Orchard (NOI14_orchard)	C++14	25 / 25	178 ms	8184 KiB

orchard

#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);

  int n, m, total = 0;
  cin >> n >> m;
  vector<vector<int>> a(n);
  for (int i = 0; i < n; i++) {
    a[i].resize(m);
    for (int j = 0; j < m; j++) {
      int x;
      cin >> x;
      if (x == 0) {
        a[i][j] = +1;
      } else {
        a[i][j] = -1;
        total++;
      }
    }
  }
  int sol = (int) 1e9;
  for (int l = 0; l < n; l++) {
    vector<int> sum(m, 0);
    for (int r = l; r < n; r++) {
      for (int j = 0; j < m; j++) {
        sum[j] += a[r][j];
      }
      int pm = 0, p = 0;
      for (int j = 0; j < m; j++) {
        p += sum[j];
        sol = min(sol, p - pm);
        pm = max(pm, p);
      }
    }
  }
  sol += total;
  cout << sol << "\n";
}

• Subtask 1: 4 / 4
• Subtask 2: 4 / 4
• Subtask 3: 5 / 5
• Subtask 4: 3 / 3
• Subtask 5: 4 / 4
• Subtask 6: 5 / 5