#include <bits/stdc++.h>
#define int long long
#define ff first
#define ss second
using namespace std;
signed main() {
ios_base::sync_with_stdio(0);
cin.tie(NULL);
int n;
cin >> n;
vector <vector <int>> adj1;
adj1.assign(n + 1, {});
for (int i = 1;i <= n;i++) {
int k;
cin >> k;
for (int j = 0;j < k;j++) {
int x;
cin >> x;
adj1[x].push_back(i);
}
}
// for (int i = 1;i <= n;i++) {
// cout << i << ": ";
// for (auto x : adj1[i]) {
// cout << x << " ";
// }
// cout << endl;
// }
int ans = INT_MAX;
for (int i = 1;i <= n;i++) {
queue <int> q;
int sum = 0;
q.push(i);
vector <bool> vis(n + 1, 0);
vector <int> salar(n + 1, 0);
salar[i] = 1;
vis[i] = 1;
while (!q.empty()) {
auto u = q.front();
q.pop();
for (auto v : adj1[u]) {
if (!vis[v]) {
salar[v] = salar[u] + 1;
vis[v] = true;
q.push(v);
}
}
}
for (int i = 1;i <= n;i++) sum += salar[i];
for (int i = 1;i <= n;i++)
if (vis[i] == false) sum = INT_MAX;
ans = min(ans, sum);
// cout << i << " " << sum << endl;
}
cout << ans << endl;
// cout << ans << endl;
}
