#include<bits/stdc++.h>
using namespace std;
#define fast ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define ll long long int
const ll N = 100+5 , INF = 1e18 , MOD = 1e9+7;
void solve(){
ll n;
cin >> n;
vector<ll> adj[n+5];
for(ll i = 1; i <= n; i++){
ll x;
cin >> x;
for(ll j = 1; j <= x; j++){
ll a;
cin >> a;
adj[a].push_back(i);
}
}
ll ans = INF;
for(ll root = 1; root <= n; root++){
vector<ll> depth(n+5,-1);
queue<ll> q;
depth[root] = 1;
q.push(root);
while(q.size()){
ll a = q.front();
q.pop();
for(auto u : adj[a]){
if(depth[u] == -1){
depth[u] = depth[a]+1;
q.push(u);
}
}
}
ll cost = 0;
for(ll i = 1; i <= n; i++) cost += depth[i];
ans = min(ans,cost);
}
cout << ans;
}
int main(){
fast;
ll tc = 1;
// cin >> tc;
while(tc--) solve();
return 0;
}
