Submission #297788

#	Time	Username	Problem	Language	Result	Execution time	Memory
297788		eriksuenderhauf	Furniture (JOI20_furniture)	C++17	100 / 100	396 ms	23928 KiB

furniture

#include <bits/stdc++.h>
using namespace std;
int in[1005][1005], out[1005][1005], a[1005][1005], cnt[2005];

void remove(int i, int j) {
  if (a[i][j]) return;
  a[i][j] = 1, cnt[i + j]--;
  if (--in[i+1][j] == 0) remove(i+1, j);
  if (--in[i][j+1] == 0) remove(i, j+1);
  if (--out[i-1][j] == 0) remove(i-1, j);
  if (--out[i][j-1] == 0) remove(i, j-1);
}

int main() {
  ios_base::sync_with_stdio(false); cin.tie(0);
  int n, m; cin >> n >> m;
  for (int i = 1; i <= n; a[i][0] = a[i][m+1] = 1, i++) {
    for (int j = 1; j <= m; a[0][j] = a[n+1][j] = 1, j++) {
      cnt[i+j]++;
      in[i+1][j]++, in[i][j+1]++;
      out[i-1][j]++, out[i][j-1]++;
    }
  }
  for (int i = 1; i <= n; i++) {
    for (int j = 1; j <= m; j++) {
      int x; cin >> x;
      if (x) remove(i, j);
    }
  }
  int q; cin >> q;
  while (q--) {
    int i, j, ans = 0; cin >> i >> j;
    if (cnt[i + j] != 1 || a[i][j] == 1)
      remove(i, j), ans = 1;
    cout << ans << "\n";
  }
}

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