// #pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pii>
#define db long double
#define vll vector<pll>
#define endl '\n'
#define all(x) x.begin(), x.end()
#define fastio ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define int long long
const int sz = 5e3 + 5;
vi g[sz];
int n, m, x, res = 1e18;
void fmain(){
cin >> n;
for(int i = 1; i <= n; i++){
cin >> m;
for(int j = 1; j <= m; j++){
cin >> x;
g[x].push_back(i);
}
}
for(int root = 1; root <= n; root++){
int ans = 0;
queue<pii> q;
vi used(n + 5, 0);
q.push({root, 1});
int cnt = 0;
while(!q.empty()){
int cur = q.front().first, w = q.front().second;
q.pop();
cnt++;
ans += w;
used[cur] = 1;
for(int i : g[cur]){
if(used[i]) continue;
used[i] = true;
q.push({i, w + 1});
}
}
if(cnt == n) res = min(res, ans);
}
cout << res;
}
signed main(){
int tmr = 1;
// cin >> tmr;
while(tmr--){
fmain();
}
}
