Submission #886344

#	Time	Username	Problem	Language	Result	Execution time	Memory
886344		stefanneagu	Furniture (JOI20_furniture)	C++17	5 / 100	180 ms	13648 KiB

furniture

#include <bits/stdc++.h>
using namespace std;
const int nmax = 1e3 + 5;
int jd[nmax][nmax], ss[nmax][nmax], diag[nmax], n, m;
int f[nmax][nmax];
void remo(int i, int j) {
  if (f[i][j]) return;
  f[i][j] = 1, diag[i + j]--;
  if (--jd[i+1][j] == 0) remo(i+1, j);
  if (--jd[i][j+1] == 0) remo(i, j+1);
  if (--ss[i-1][j] == 0) remo(i-1, j);
  if (--ss[i][j-1] == 0) remo(i, j-1);
}
int main() {
  ios_base::sync_with_stdio(false); cin.tie(0);
  cin >> n >> m;
  for (int i = 1; i <= n; f[i][0] = f[i][m+1] = 1, i++) {
    for (int j = 1; j <= m; f[0][j] = f[n+1][j] = 1, j++) {
      diag[i+j]++;
      jd[i+1][j]++, jd[i][j+1]++;
      ss[i-1][j]++, ss[i][j-1]++;
    }
  }
  for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= m; j++) {
      int x; cin >> x;
      if (x) remo(i, j);
    }
  }
  int q; cin >> q;
  while (q--) {
    int i, j, ans = 0; cin >> i >> j;
    if (diag[i + j] != 1 || f[i][j] == 1)
      remo(i, j), ans = 1;
    cout << ans << "\n";
  }
  return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95