// Meow :3
#include <bits/stdc++.h>
#define int long long int
using namespace std;
const int MAXN = 5e3 + 5;
queue <int> q;
bool mark[MAXN];
vector <int> adj[MAXN];
int h[MAXN];
int ans = 0;
int cnt = 0;
void bfs(){
while(!q.empty()){
int v = q.front();
q.pop();
ans += h[v];
cnt++;
for(auto u : adj[v]){
if(!mark[u]){
h[u] = h[v] + 1;
mark[u] = true;
q.push(u);
}
}
}
}
signed main(){
int n;
cin>>n;
for(int i = 1 ; i <= n ; i++){
int k;
cin>>k;
for(int j = 1 ; j <= k ; j++){
int x;
cin>>x;
adj[x].push_back(i);
}
}
int ANS = 1e18;
for(int i = 1 ; i <= n ; i++){
mark[i] = 1;
q.push(i);
h[i] = 1;
bfs();
memset(mark , 0 , sizeof mark);
fill(h + 1 , h + n + 1 , 0);
if(cnt == n) ANS = min(ans , ANS);
ans = 0;
cnt = 0;
}
cout<<ANS<<endl;
}
