#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long ull;
typedef long long ll;
typedef vector<int> vi;
#define MAXI (int)1e5
vector<int> ad[3*MAXI+1];
queue<int> q;
int dist[200001];
int bfs(int x,int n){
vector<bool> visi(n+1,0);
q.push(x);
ll cost = 1;
dist[x] = 1;
int cntr = 1;
while(!q.empty()){
int u = q.front(); q.pop();
if(visi[u]) continue;
visi[u] = true;
for(auto s: ad[u]){
if(!visi[s]){
dist[s] = dist[u]+1;
cost+=dist[s];
q.push(s);
cntr++;
}
}
}
return cntr == n ? cost: 1e9;
}
void solve(){
int n; cin >> n;
for(int i = 1;i<=n;i++){
int x; cin >> x;
for(int j = 0;j<x;j++){
int g; cin >> g;
ad[g].push_back(i);
}
}
int mini = 1e9;
for(int i = 1;i<=n;i++) {
mini = min(mini,bfs(i,n));
}
cout << mini;
}
int main(){
ios::sync_with_stdio(0);
cin.tie(nullptr);
cout << fixed << setprecision(8);
int t = 1;
// cin >> t;
while(t){
solve();
t--;
cout << "\n";
}
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
7252 KB |
Output is correct |
2 |
Incorrect |
4 ms |
7368 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
7252 KB |
Output is correct |
2 |
Incorrect |
4 ms |
7368 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
7252 KB |
Output is correct |
2 |
Incorrect |
4 ms |
7368 KB |
Output isn't correct |
3 |
Halted |
0 ms |
0 KB |
- |