#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
int n; cin >> n;
vector<vector<int>> g(n+1);
for(int i = 1; i <= n; i++){
int k; cin >> k;
for(int y = 0; y < k; y++){
int a; cin >> a;
g[a].push_back(i);
}
}
int mn = 1e18;
for(int i = 1; i <= n; i++){
queue<pair<int, int>> q;
vector<bool> d(n+1);
q.push({i, 1});
int ns = 0;
int co = 0;
while(q.size() > 0){
co++;
auto [k, time] = q.front();
if(d[k]) continue;
d[k] = true;
q.pop();
ns += time;
for(int i = 0; i < g[k].size(); i++){
if(d[g[k][i]]) continue;
q.push({g[k][i], time+1});
}
}
if(co != n) continue;
mn = min(mn, ns);
}
cout << mn << "\n";
return 0;
}
