#include <bits/stdc++.h>
using namespace std;
vector <int> adiacenta[5001];
int distanta[5001] , moment[5001];
int main ()
{
ios :: sync_with_stdio(false);
cin.tie(NULL); cout.tie(NULL);
int numar_noduri;
cin >> numar_noduri;
for (int nod = 1 ; nod <= numar_noduri ; nod++)
{
int grad;
cin >> grad;
while (grad--)
{
int sursa; cin >> sursa;
adiacenta[sursa].push_back(nod);
}
}
int minim = INT32_MAX;
for (int radacina = 1 ; radacina <= numar_noduri ; radacina++)
{
int suma = 1;
distanta[radacina] = 1;
moment[radacina] = radacina;
queue <int> candidati; candidati.push(radacina);
while (!candidati.empty())
{
const int nod = candidati.front();
candidati.pop();
for (auto& vecin : adiacenta[nod]) {
if (moment[vecin] != radacina)
{
moment[vecin] = radacina;
distanta[vecin] = distanta[nod] + 1;
suma += distanta[vecin];
candidati.push(vecin);
}
}
}
minim = min(minim , suma);
}
cout << minim;
return 0;
}
