//#pragma GCC optomize ("Ofast")
//#pragma GCC optomize ("unroll-loops")
//#pragma GCC target ("avx,avx2,fma")
#include <bits/stdc++.h>
#define F first
#define S second
#define ll long long
#define all(x) (x.begin(), x.end());
#define uint unsigned int
#define pb push_back
using namespace std;
const ll N = 2e5+1, INF = 1e18 , inf = 1e9 , mod = 1e9+7;
int n, m, cnt = 0, mn = inf, mx = -inf, mxsum, mnsum;
char a[2002][2002];
bool used[2002][2002];
int di[4]{-1, 0, 1, 0};
int dj[4]{0, -1, 0, 1};
bool ok = 0;
void dfs(int vi, int vj){
used[vi][vj] = 1;
cnt++;
mx = max(mx, abs(vi-vj));
mn = min(mn, abs(vi-vj));
mxsum = max(mxsum, vi+vj);
mnsum = min(mnsum, vi+vj);
for(int i = 0; i < 4; i++){
int toi = vi+di[i], toj = vj+dj[i];
if(toi >= 1 && toi <= n && toj >= 1 && toj <= m){
if(!used[toi][toj] && a[toi][toj] == '.'){
dfs(toi, toj);
}
}
else{
ok = 1;
return;
}
}
}
int main(){
// freopen("points.in", "r", stdin);
// freopen("points.out", "w", stdout);
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
cin >> n >> m;
for(int i = 1; i <= n; i++){
for(int j = 1; j <= m; j++){
cin >> a[i][j];
}
}
int ans = 0;
for(int i = 1; i <= n; i++){
for(int j = 1; j <= m; j++){
if(used[i][j] || a[i][j] == '#') continue;
else{
cnt = 0;
mx = -inf;
mn = inf;
mxsum = -inf;
mnsum = inf;
ok = 0;
dfs(i, j);
if(mxsum-mnsum == mx-mn && (mxsum-mnsum)%2 == 0 && !ok){
int q = (mxsum-mnsum)/2+1;
if(2*q*q-2*q+1 == cnt) ans++;
}
}
}
}
cout << ans;
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 2 |
Correct |
1 ms |
468 KB |
Output is correct |
| 3 |
Incorrect |
1 ms |
596 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
1 ms |
1236 KB |
Output is correct |
| 2 |
Correct |
1 ms |
468 KB |
Output is correct |
| 3 |
Incorrect |
1 ms |
596 KB |
Output isn't correct |
| 4 |
Halted |
0 ms |
0 KB |
- |
