#include<stdio.h>

int father[30001],i,j;

void init(int n)
{
	for(i=0;i<n;i++)father[i]=i;
}

int find(int p)
{
	if(father[p]!=p) father[p]=find(father[p]);
	return father[p];
}

int main()
{
	int n,m;
	
	while(1)
	{
		scanf("%d",&n);
		if(!n) break;
		scanf("%d",&m);
		init(n);
		int k,tmp1,tmp2;
		for(i=0;i<m;i++)
		{
			scanf("%d",&k);
			scanf("%d",&tmp1);
			for(j=1;j<k;j++)
			{
				scanf("%d",&tmp2);
				father[find(tmp2)]=tmp1;
			}
		}
		father[find(0)]=0;
		father[0]=0;
		int ans=1;
		for(i=1;i<n;i++)
			if(find(i)==0) ans++;
		printf("%d\n",ans);	
	}
	return 0;
}

• Re:哪位能给看看阿？怎么老RE呢？！ (717) lironghua 2007-09-24 20:52:00
• Re:哪位能给看看阿？怎么老RE呢？！ (11) lironghua 2007-09-24 20:52:39