#include "bits/stdc++.h"
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define rrep(i,n) for( int i = n; i >= 0; i-- )
#define REP(i,s,t) for( int i = s; i <= t; i++ )
#define RREP(i,s,t) for( int i = s; i >= t; i-- )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000


int main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);

	int n, m;
	cin >> n >> m;

	vector<int> item[n];
	vector<int> get;

	rep(i, m) {
		int g, r;
		cin >> g >> r;
		g--;
		rep(j, r) {
			int h;
			cin >> h;
			h--;
			item[g].push_back(h);
		}
	}
	rep(i, n) {
		if (item[i].size() == 0) get.push_back(i);
	}
	int prevsize = -1;
	while (prevsize != get.size()) {
		prevsize = get.size();
		rep(i, n) {
			if (item[i].size() == 0) continue;
			int flag = 1;
			rep(j, item[i].size()) {
				auto itr = find(get.begin(), get.end(), item[i][j]);
				if (itr == get.end()) {
					flag = 0;
					break;
				}
			}
			if (flag) {
				auto itr = find(get.begin(), get.end(), i);
				if (itr == get.end()) {
					get.push_back(i);
				}
			}
		}
		// dump(get.size());
		//rep(i, get.size()) cout << get[i] << " ";
		//cout << endl;
	}
	cout << get.size() << endl;





    return 0;
}