#include <bits/stdc++.h> using namespace std; #define int long long signed main(){ ios_base::sync_with_stdio(0); cin.tie(0); int n; cin >> n; vector<vector<int>> g(n+1); for(int i = 1; i <= n; i++){ int k; cin >> k; for(int y = 0; y < k; y++){ int a; cin >> a; g[a].push_back(i); } } int mn = 1e18; for(int i = 1; i <= n; i++){ queue<pair<int, int>> q; vector<bool> d(n+1); q.push({i, 1}); int ns = 0; int co = 0; while(q.size() > 0){ co++; auto [k, time] = q.front(); if(d[k]) continue; d[k] = true; q.pop(); ns += time; for(int i = 0; i < g[k].size(); i++){ if(d[g[k][i]]) continue; q.push({g[k][i], time+1}); } } if(co != n) continue; mn = min(mn, ns); } cout << mn << "\n"; return 0; }