#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n;
cin >> n;
vector<vector<int>> a(n);
for (int i = 0; i < n; i++) {
int m;
cin >> m;
while (m--) {
int k;
cin >> k;
k--;
a[k].push_back(i);
}
}
int ans = 1e18;
for (int r = 0; r < n; r++) {
vector<vector<int>> g(n);
vector<int> d(n, -1);
queue<int> q;
q.push(r);
d[r] = 1;
vector<bool> vis(n);
vis[r] = 1;
while (!q.empty()) {
int i = q.front(); q.pop();
vis[i] = 1;
for (auto j : a[i]) {
if (!vis[j]) {
d[j] = d[i] + 1;
vis[j] = 1;
q.push(j);
}
}
}
int res = accumulate(d.begin(), d.end(), 0LL);
ans = min(ans, res);
}
cout << ans << '\n';
return 0;
}
