C++ :

#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
int map[210][210], father[210];
int main()
{
//    freopen("a.txt","r",stdin);
    int n, i, j, k, x;
    while(cin >> n)
    {
        memset(map,0,sizeof(map));
        for(i = 1; i <= n; ++ i)
            while(scanf("%d",&x),x)
               map[i][x] = 1;
        for(k = 1; k <= n; ++ k)
        for(i = 1; i <= n; ++ i)
        for(j = 1; j <= n; ++ j)
                if(map[i][k] && map[k][j])
                    map[i][j] = 1;
       for(i = 1; i <= n; ++ i)
           father[i] = i;
       for(i = 1; i <= n; ++ i)
       for(j = 1; j <= n; ++ j)
           if(map[i][j]) father[j] = father[i];
       int cnt = 0;
       for(i = 1; i <= n; ++ i)
           if(father[i] == i) cnt ++;
        cout << cnt << endl;
    }
    return 0;
}