#include<bits/stdc++.h>
using namespace std;
const int N = 1e5+9;
vector<int> g[N];
bool visit[N]={0};
int dfs(int u){
visit[u] = true;
int nub = 1;
for(auto v : g[u]){
if(!visit[v]){
nub+=dfs(v);
}
}
return nub;
}
int main(){
cin.tie(0)->sync_with_stdio(false);
int n,m;
cin>>n;
for(int i=1;i<=n;i++){
int k;
cin>>k;
for(int j=1;j<=k;j++){
cin>>m;
g[i].push_back(m);
}
}
int sum = 0;
for(int i=1;i<=n;i++){
if(!visit[i]) {
int res = dfs(i);
// cout<<res<<" ";
sum += 1<<(res-1);
}
}
cout<<sum;
return 0;
}
/*
4
1 4
3 1 3 4
2 1 2
1 3
*/
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2904 KB |
Output is correct |
2 |
Incorrect |
1 ms |
2648 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2904 KB |
Output is correct |
2 |
Incorrect |
1 ms |
2648 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2904 KB |
Output is correct |
2 |
Incorrect |
1 ms |
2648 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |