#include <cstdio>
#include <vector>
using namespace std;

int main(void) {
    int n, m, g, r, x;
    vector<int> h[550];
    scanf("%d %d", &n, &m);
    for (int i = 0; i < m; i++) {
        scanf("%d %d", &g, &r);
        for (int j = 0; j < r; j++) {
            scanf("%d", &x);
            h[g - 1].push_back(x - 1);
        }
    }
    bool ch[550] = {};
    for (int i = 0; i < n; i++) {
        if (h[i].empty()) ch[i] = true;
    }
    bool rp = true, f;
    while (rp) {
        rp = false;
        for (int i = 0; i < n; i++) {
            f = true;
            if (h[i].empty()) continue;
            for (int j = 0; j < h[i].size(); j++) {
                if (!ch[h[i][j]]) f = false;
                if (!f) break;
            }
            if (f) {
                ch[i] = true;
                h[i].clear();
                rp = true;
            }
        }
    }
    int ans = 0;
    for (int i = 0; i < n; i++) if (ch[i]) ans++;
    printf("%d\n", ans);
    return 0;
}