#include<bits/stdc++.h>
using namespace std;
#define LL long long
const int N = 5005;
vector<LL> g[N];
LL vis[N], lvl[N];
int main() {
ios::sync_with_stdio(0), cin.tie(0);
LL n;
cin >> n;
for(int i = 1; i <= n; i++){
LL k;
cin >> k;
while(k--){
LL x; cin >> x;
g[x].push_back(i);
}
}
LL ans = 1e18;
for(int i = 1; i <= n; i++){
LL mx = 0;
memset(vis, 0, sizeof vis);
memset(lvl, 0, sizeof lvl);
queue<LL> q;
q.push(i);
lvl[i] = vis[i] = 1;
while(!q.empty()){
LL k = q.front();
mx = max(mx, lvl[k]);
q.pop();
for(auto v : g[k]){
if(vis[v] == 0){
lvl[v] = lvl[k] + 1;
q.push(v);
vis[v] = 1;
}
}
}
LL res = 0, ok = 0;
for(int i = 1; i <= n; i++){
if(vis[i] == 0){
ok = 1;
break;
}
res += mx - lvl[i] + 1;
}
if(ok != 1) ans = min(ans, res);
}
cout << ans;
}
