import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;

public class Main {

	void run() {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int m = sc.nextInt();
		int[] deg = new int[n];
		ArrayList<Integer>[] g = new ArrayList[n];
		for (int i = 0; i < g.length; ++i)
			g[i] = new ArrayList<>();
		for (int i = 0; i < m; ++i) {
			int a = sc.nextInt();
			int b = sc.nextInt();
			--a;
			for (int j = 0; j < b; ++j) {
				int h = sc.nextInt();
				--h;
				g[h].add(a);
				++deg[a];
			}
		}
		int INF = 99999;
		int ans = 0;
		out:for (int i = 0; i < n; ++i) {
			int mi = INF;
			for (int d : deg)
				mi = Math.min(mi, d);
			for (int j = 0; j < n; ++j) {
				if (deg[j] == mi) {
					if (deg[j] == 0)
						++ans;
					else
						break out;
					deg[j] = INF;
					for (int dst : g[j])
						--deg[dst];
				}
			}
		}
		System.out.println(ans);
	}

	public static void main(String[] args) {
		new Main().run();
	}

	void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

}