#include <bits/stdc++.h>
using namespace std;

int main() {
  ios::sync_with_stdio(false);

  int N, M; {
    cin >> N >> M;
  }

  vector<int> G(M);
  vector<vector<int>> H(M); {
    for (int i = 0; i < M; ++i) {
      int n;
      cin >> G[i] >> n;
      --G[i];
      H[i].resize(n);
      for (int j = 0; j < n; ++j) {
        cin >> H[i][j];
        --H[i][j];
      }
    }
  }

  vector<int> taken(N); {
    vector<int> cnt(N); {
      for (int g : G) ++cnt[g];
    }
    for (int i = 0; i < N; ++i) if (cnt[i] == 0) taken[i] = 1;
  }

  vector<int> cnt(M); {
    auto update = [&](int u) {
      for (int i = 0; i < M; ++i) {
        for (int h : H[i]) if (h == u) cnt[i] += 1;
      }
    };
    for (int i = 0; i < N; ++i) if (taken[i]) update(i);
    while (true) {
      bool flag = false;
      for (int i = 0; i < M; ++i) if (cnt[i] == H[i].size() && !taken[G[i]]) {
        flag = true;
        taken[G[i]] = 1;
        update(G[i]);
      }
      if (!flag) break;
    }
  }

  int res = count(taken.begin(), taken.end(), 1);
  cout << res << endl;
}