#include <bits/stdc++.h>
#define pb push_back
#define f first
#define sc second
using namespace std;
typedef long long int ll;
typedef string str;
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
int n, m; cin >> n >> m;
bool **s = new bool*[n], **blocked = new bool*[n], **vulnerable = new bool*[n];
for(int i = 0; i < n; i++){
s[i] = new bool[m], blocked[i] = new bool[m], vulnerable[i] = new bool[m];
fill(s[i], s[i]+m, 0);
fill(blocked[i], blocked[i]+m, 0);
fill(vulnerable[i], vulnerable[i]+m, 0);
}
auto valid = [&](int x, int y){
return x >= 0 && x < n && y >= 0 && y < m;
};
auto is_blocked = [&](int x, int y){
return !valid(x, y) || blocked[x][y];
};
auto is_vulnerable = [&](int x, int y){
return valid(x, y) && vulnerable[x][y];
};
function<void(int, int)> make_vulnerable = [&](int x, int y){
if(!valid(x, y)) return;
if(vulnerable[x][y]) return;
vulnerable[x][y] = 1;
if(is_blocked(x-1, y)) make_vulnerable(x, y-1);
if(is_blocked(x, y-1)) make_vulnerable(x-1, y);
};
function<void(int, int)> block = [&](int x, int y){
blocked[x][y] = 1;
if(is_vulnerable(x+1, y) && valid(x+1, y-1)) make_vulnerable(x+1, y-1);
if(is_vulnerable(x, y+1) && valid(x-1, y+1)) make_vulnerable(x-1, y+1);
if(!is_blocked(x+1, y) && is_blocked(x+1, y-1)) block(x+1, y);
if(!is_blocked(x, y+1) && is_blocked(x-1, y+1)) block(x, y+1);
};
auto add = [&](int x, int y){
if(is_vulnerable(x, y)) return 0;
block(x, y);
return 1;
};
make_vulnerable(n-1, m-1);
for(int i = 0; i < n; i++) for(int j = 0; j < m; j++){
bool x; cin >> x;
if(x) add(i, j);
}
int q; cin >> q;
while(q--){
int x, y; cin >> x >> y; x--, y--;
cout << add(x, y) << "\n";
}
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
| 3 |
Halted |
0 ms |
0 KB |
- |
