#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define int long long
const int N = 1069;
int n, m, a[N][N], dp1[N][N], dp2[N][N];
int g[N][N];
signed main() {
ios::sync_with_stdio(false);
cin.tie(0);
int tt = 1;
//cin >> tt;
while (tt--) {
cin >> n >> m;
for (int i = 1;i <= n;i++) {
for (int j = 1;j <= m;j++)
cin >> a[i][j];
}
for (int i = 1;i <= n;i++) {
for (int j = 1;j <= m;j++)
dp1[i][j] = (dp1[i - 1][j] | dp1[i][j - 1] | a[i][j]);
}
for (int i = n;i >= 0;i--) {
for (int j = m;j >= 0;j--)
dp2[i][j] = (dp2[i + 1][j] | dp2[i][j + 1] | a[i][j]);
}
for (int i = 1;i <= n;i++) {
for (int j = 1;j <= m;j++)
g[i][j] = (dp1[i][j] | dp2[i][j]);
}
for (int i = 1;i <= m;i++)
g[0][i] = g[n + 1][i] = 1;
for (int i = 1;i <= n;i++)
g[i][0] = g[i][m + 1] = 1;
g[1][1] = g[n][m] = 0;
int q;
cin >> q;
while (q--) {
int x, y;
cin >> x >> y;
int ok = 0;
queue<pair<int, int>> q;
q.push({x, y});
while (!q.empty()) {
auto v = q.front();
int i = v.f, j = v.s;
g[i][j] = 1;
q.pop();
if (i > 0 && g[i - 1][j + 1] && !g[i - 1][j])
q.push({i - 1, j});
if (j > 0 && g[i + 1][j - 1] && !g[i][j - 1])
q.push({i, j - 1});
}
q.push({x, y});
while (!q.empty()) {
auto v = q.front();
int i = v.f, j = v.s;
g[i][j] = 1;
q.pop();
if (i > 0 && g[i - 1][j + 1] && !g[i][j + 1])
q.push({i, j + 1});
if (j > 0 && g[i + 1][j - 1] && !g[i + 1][j])
q.push({i + 1, j});
}
if (!g[1][2] || !g[2][1])
cout << 1 << '\n';
else {
q.push({x, y});
while (!q.empty()) {
auto v = q.front();
int i = v.f, j = v.s;
g[i][j] = 0;
q.pop();
if (i > 0 && g[i - 1][j + 1] && g[i - 1][j])
q.push({i - 1, j});
if (j > 0 && g[i + 1][j - 1] && g[i][j - 1])
q.push({i, j - 1});
}
q.push({x, y});
while (!q.empty()) {
auto v = q.front();
int i = v.f, j = v.s;
g[i][j] = 0;
q.pop();
if (i > 0 && g[i - 1][j + 1] && g[i][j + 1])
q.push({i, j + 1});
if (j > 0 && g[i + 1][j - 1] && g[i + 1][j])
q.push({i + 1, j});
}
cout << 0 << '\n';
}
}
}
return 0;
}
Compilation message
furniture.cpp: In function 'int main()':
furniture.cpp:42:9: warning: unused variable 'ok' [-Wunused-variable]
42 | int ok = 0;
| ^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
7256 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
1 ms |
7256 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
