/* 
 * Problem: POI1999 gro
 * Author: Guo Jiabao
 * Time: 2008.12.14 10:00:32
 * State: Solved
*/
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <cstring>

using namespace std;

const int MAX=201;
const int INF=0x7FFFFFFF;

struct edge
{
	int c,t;
	edge *next,*op;
};

struct adjl
{
	edge *f,*l;
};

edge E[MAX*MAX];
adjl A[MAX];
edge *P[MAX],*Stae[MAX];
int N,S,T,Ec,Maxflow;
int Lv[MAX],Que[MAX],Stap[MAX];

edge* adjl_ins(adjl &L,int t,int c)
{
	if (!L.f)
		L.f=L.l=&E[Ec];
	else
		L.l=L.l->next=&E[Ec];
	E[Ec].c=c;
	E[Ec].t=t;
	E[Ec].next=0;
	return &E[Ec++];
}

void addedge(int a,int b,int v)
{
	edge *pa,*pb;
	pa=adjl_ins(A[a],b,v);
	pb=adjl_ins(A[b],a,0);
	pa->op=pb;
	pb->op=pa;
}

void init()
{
	int i,j,p,t,v;
	freopen("gro.in","r",stdin);
	freopen("gro.out","w",stdout);
	scanf("%d",&N);
	S=1;T=N;
	for (i=1;i<=N;i++)
	{
		A[i].f=0;
	}
	for (i=1;i<=N;i++)
	{
		scanf("%d",&p);
		for (j=1;j<=p;j++)
		{
			scanf("%d",&t);
			v=1;
			if (i!=S && i!=T && t!=S && t!=T)
				v=INF;
			addedge(i,t,v);
		}
	}
	
}

bool Dinic_Level()
{
	int Head,Tail,i,j,c;
	edge *k;
	memset(Lv,0,sizeof(Lv));
	Lv[S]=1;
	Que[Head=0,Tail=0]=S;
	while (Head<=Tail)
	{
		i=Que[Head++];
		for (k=A[i].f;k;k=k->next)
		{
			j=k->t; c=k->c;
			if (Lv[j]==0 && c>0)
			{
				Lv[j]=Lv[i]+1;
				Que[++Tail]=j;
			}
		}
	}
	return Lv[T]!=0;
}

int Dinic_Flow()
{
	int i,u,v,top=0,flow=0,delta,rtn;
	for (i=S;i<=T;i++)
		P[i]=A[i].f;
	Stap[++top]=S;
	while (top)
	{
		u=Stap[top];
		if (u!=T)
		{
			while (P[u] && (P[u]->c<=0 || Lv[u]+1!=Lv[ v=P[u]->t ]) )
				P[u]=P[u]->next;
			if (P[u])
			{
				v=P[u]->t;
				Stap[++top]=v;
				Stae[top]=P[u];
				P[u]=P[u]->next;
			}
			else
				top--;
		}
		else
		{
			delta=INF;
			for (i=top;i>=2;i--)
				if (Stae[i]->c < delta)
					delta=Stae[i]->c;
			flow+=delta;
			for (i=top;i>=2;i--)
			{
				Stae[i]->c-=delta;
				Stae[i]->op->c+=delta;
				if (Stae[i]->c==0)
					rtn=i-1;
			}
			top=rtn;
		}
	}
	return flow;
}

void Dinic()
{
	while (Dinic_Level())
		Maxflow+=Dinic_Flow();
}

int main()
{
	init();
	Dinic();
	printf("%d",Maxflow);
	return 0;
}