#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("Ofast,unroll-loops")
#pragma GCC target("avx2,tune=native")
const int MAX = 5e3 + 10;
const int INF = 0x3f3f3f3f;
int n;
vector<int> adj[MAX];
inline int get(void)
{
char c = getchar();
while (c < '0' || c > '9')
c = getchar();
int ret = 0;
while (c >= '0' && c <= '9')
ret = ret * 10 + (c - '0'), c = getchar();
return ret;
}
inline int testRoot(int root)
{
vector<int> salary(n + 1);
queue<int> q; q.push(root);
int totalCost = 0;
salary[root] = 1;
while(q.size())
{
int u = q.front(); q.pop();
totalCost += salary[u];
for(auto v : adj[u])
{
if(salary[v]) continue;
salary[v] = salary[u] + 1;
q.push(v);
}
}
for(int i = 1; i <= n; i++)
if(!salary[i]) return INF;
return totalCost;
}
int32_t main(void)
{
n = get();
for(int i = 1; i <= n; i++)
{
int k = get();
while(k--)
{
int u = get();
adj[u].push_back(i);
}
}
int ans = INF;
for(int i = 1; i <= n; i++)
ans = min(ans, testRoot(i));
cout << ans << '\n';
}
