/*
* author : Apiram
* created: 27.06.2023 03:25:28
*/
#include<bits/stdc++.h>
using namespace std;
int main(){
ios_base::sync_with_stdio(false);
cin.tie(0);
int n;cin>>n;
vector<vector<int>>adj(n);
for (int i = 0;i<n;++i){
int k;cin>>k;
for (int j = 0;j<k;++j){
int x;cin>>x;
--x;
adj[x].push_back(i);
}
}
int pos = 1e9;
function<pair<int,int>(int,vector<vector<int>>&)>dfs = [&](int u,vector<vector<int>>&nx){
pair<int,int> v = {1,0};
for (auto x:nx[u]){
auto vv = dfs(x,nx);
v.first+=vv.first;
v.second+=vv.second;
}
v.second+=v.first;
return v;
};
for (int i = 0;i<n;++i){
queue<int>q;
int curv = 1;
vector<int>visited(n,false);
visited[i] = true;
vector<vector<int>>nx(n);
q.push(i);
while(!q.empty()){
auto u = q.front();
q.pop();
for (const int &x:adj[u]){
if (!visited[x]){
visited[x] = true;
nx[u].push_back(x);
q.push(x);
curv++;
}
}
}
if (curv == n){
pos = min(pos,dfs(i,nx).second);
}
}
cout<<pos<<'\n';
return 0;
}
