#include "bits/stdc++.h"
using namespace std;
using i64 = long long;
using u64 = unsigned long long;
using i32 = int;
using u32 = unsigned;
using i16 = short;
using u16 = unsigned short;
using ld = long double;
using ii = pair<int, int>;
void solve() {
int n;
cin >> n;
vector<vector<int>> g(n);
vector<int> dist(n);
i64 ans = LLONG_MAX;
for(int i = 0; i < n; ++i) {
int deg;
cin >> deg;
while(deg--) {
int p;
cin >> p;
g[p - 1].push_back(i);
}
}
for(int v = 0; v < n; ++v) {
fill(dist.begin(), dist.end(), -1);
queue<int> q;
i64 sum_dist = 0;
int vis = 0;
q.push(v);
dist[v] = 1;
while(!q.empty()) {
int v = q.front();
q.pop();
++vis;
sum_dist += dist[v];
for(int u : g[v]) {
if(dist[u] != -1) continue;
dist[u] = 1 + dist[v];
q.push(u);
}
}
if(vis == n) ans = min(ans, sum_dist);
}
cout << ans << '\n';
}
int main() {
ios_base :: sync_with_stdio(false);
cin.tie(0);
int t = 1;
//cin >> t;
while(t--) solve();
return 0;
}
