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#include<bits/stdc++.h>
using namespace std;
vector<int> g[102];
vector<int> wiel[102];
int w[102], wch[102], indeksy[102], tr[102];
int n;
void wypisz(){
	for(int i = 1; i <= n; i++){
		cout << i <<" : ";
		for(int j = 0; j < wiel[i].size(); j++) {
			cout << wiel[i][j] <<" ";
		}
		cout << endl;
	}
}
int main()
{
	ios_base::sync_with_stdio(0);	
	int i, j, k, a, trasy = 0, ost=0;
	cin >> n;
	for(i = 1; i <= n; i++){
		cin >> k;	
		for(j = 1; j <= k; j++) {
			cin >> a;
			wch[a]++;
			g[i].push_back(a);
			//wiel[i].push_back(0);
		}
	}
	//wypisz();
	if(g[1].size() == 0 ) {
		cout << 1 ;
		return 0;
	}
	int il = 0,dl_trasy;
	i = 1;
	while(g[i].size() >  0){		
			int ind = 0;
			dl_trasy++;
			//wiel[i][ind]++;
			if (g[i].size()>0 )indeksy[i] = (indeksy[i] + 1) % g[i].size();
			tr[g[i][ind]]=1;
			i = g[i][ind];		
		}
	//cout << "dl "<<dl_trasy << endl;
	while(il < dl_trasy){
		i = 1;
		il = 0;
		while(g[i].size() >  0){			
			int ind = indeksy[i];
			//cout << "indeks " << ind << endl;
			if(tr[g[i][ind]] == 1) il++;
			//wiel[i][ind]++;
			if (g[i].size()>0 )indeksy[i] = (indeksy[i] + 1) % g[i].size();
			i = g[i][ind];
			//cout <<"il " << " ";		
		}
		trasy++;
	}
	cout << trasy;


	
return 0;
}