#include<bits/stdc++.h>
#pragma GCC optimize("unroll-loops,no-stack-protector")
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<ll,ll> pll;
const ll MOD=1e9+7;
const ll MOD2=998244353;
const ll N=5e3+5;
const ld pi=3.14159265359;
const ll INF=(1LL<<60);
#define SQ(i) ((i)*(i))
#define REP(i,n) for(ll i=0;i<n;i++)
#define REP1(i,n) for(ll i=1;i<=n;i++)
#define pb push_back
#define mp make_pair
#define X first
#define Y second
#define setp setprecision
#define lwb lower_bound
#define SZ(_a) (ll)_a.size()
ll n,x,ans=INF,tmp,d[N],t;
queue<ll> q;
vector<ll> v[N];
ll f(ll id){
memset(d,-1,sizeof(d));
d[id]=tmp=0;
q.push(id);
while(SZ(q)){
x=q.front();
q.pop();
tmp+=d[x];
for(ll i:v[x]){
if(d[i]==-1){
d[i]=d[x]+1;
q.push(i);
}
}
}
REP1(i,n)if(d[i]==-1)return INF;
return tmp+n;
}
int main(){
ios_base::sync_with_stdio(0);cin.tie(0);
cin>>n;
REP1(i,n){
cin>>t;
while(t--)cin>>x,v[x].pb(i);
}
REP1(i,n)ans=min(ans,f(i));
cout<<ans<<"\n";
return 0;
}
