//#pragma GCC optimize("O3")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,tune=native")
//#pragma GCC optimize ("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
const int mod = 1e9 + 7;
const int N = 5e3 + 1;
vector<int> kids[N];
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int n;
cin >> n;
for (int i = 1; i <= n; i++) {
int k;
cin >> k;
while (k--) {
int a;
cin >> a;
kids[a].push_back(i);
}
}
int ans = INT32_MAX;
for (int i = 1; i <= n; i++) {
int sum = 1;
vector<int> h(n + 1);
h[i] = 1;
queue<int> q;
q.push(i);
while (!q.empty()) {
int v = q.front();
q.pop();
for (int u : kids[v]) {
if (!h[u]) {
sum += (h[u] = h[v] + 1);
q.push(u);
}
}
}
if (*min_element(h.begin() + 1, h.end())) {
ans = min(ans, sum);
}
}
cout << ans;
return 0;
}
