#include <bits/stdc++.h>
using namespace std;
int pizzas(int n, vector<vector<int>>& mixing) {
priority_queue<int> pq;
vector<int> visited(1<<n, 0);
pq.push(0);
int ans = 1;
while (!pq.empty()) {
int mask = pq.top();
pq.pop();
for (int i = 0; i < n; ++i) {
if (mask & (1<<i) || visited[mask | (1<<i)]) continue;
bool control = true;
for (int j = 0; j < n; ++j) {
if ((mask & (1<<j)) && mixing[i][j]) control = false;
}
int new_mask = mask | (1<<i);
if (control) {
++ans;
pq.push(new_mask);
}
visited[new_mask] = 1;
}
}
return ans;
}
int main() {
int n, m;
cin >> n >> m;
vector<vector<int>> mixing(n, vector<int>(n, 0));
while (m--) {
int a, b;
cin >> a >> b;
--a; --b;
mixing[a][b] = mixing[b][a] = 1;
}
cout << pizzas(n, mixing) << '\n';
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
600 KB |
Output is correct |
2 |
Correct |
1 ms |
348 KB |
Output is correct |
3 |
Correct |
2 ms |
4440 KB |
Output is correct |
4 |
Correct |
2 ms |
4440 KB |
Output is correct |
5 |
Correct |
2 ms |
4444 KB |
Output is correct |
6 |
Correct |
2 ms |
4444 KB |
Output is correct |
7 |
Correct |
3 ms |
4444 KB |
Output is correct |
8 |
Correct |
3 ms |
4444 KB |
Output is correct |
9 |
Correct |
26 ms |
4544 KB |
Output is correct |
10 |
Correct |
89 ms |
4444 KB |
Output is correct |