#include <bits/stdc++.h>

using namespace std;
 
#define DEBUG(x) cout<<#x<<": "<<x<<endl;
#define DEBUG_VEC(v) cout<<#v<<":";for(int i=0;i<v.size();i++) cout<<" "<<v[i]; cout<<endl
 
typedef long long ll;
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
#define pll pair<ll,ll>
#define fi first
#define se second
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define rep1(i,n) for(int i=1;i<=(int)(n);i++)
#define all(c) c.begin(),c.end()
#define in(x, a, b) a <= x && x < b
const int inf = 1000000001;
const ll INF = 2e18;
const ll MOD = 1000000007;
//const ll mod = 1000000009;
const double pi = 3.14159265358979323846;
#define Sp(p) cout<<setprecision(15)<< fixed<<p <<endl;
int dx[4] = { 1,0, -1,0 }, dy[4] = { 0,1,0,-1 };
int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };


int main() {
  int n, m;
  cin >> n >> m;
  vector<set<int> > st(n);
  vector<bool> used(n, true);
  set<int> unused;
  rep (i, m) {
    int g, r;
    cin >> g >> r;
    g--;
    used[g] = false;
    unused.insert(g);
    rep (i, r) {
      int h;
      cin >> h;
      h--;
      st[g].insert(h);
    }
  }
  rep (i, n) {
    if (used[i]) {
      for (auto itr = unused.begin(); itr != unused.end(); itr++) {
	int j = *itr;
	st[j].erase(i);
      }
    }
  }
  bool flag = true;
  while (flag) {
    flag = false;
    vi del;
    for (auto itr = unused.begin(); itr != unused.end(); itr++) {
      int j = *itr;
      if (st[j].size() == 0) {
	flag = true;
	used[j] = true;
	del.push_back(j);
      }
    }
    rep (i, del.size()) {
      unused.erase(del[i]);
    }
    for (auto itr = unused.begin(); itr != unused.end(); itr++) {
      rep (i, del.size()) {
	int j = *itr;
	st[j].erase(del[i]);
      }
    }
  }
  int ans = 0;
  rep (i, n) {
    if (used[i]) {
      ans++;
    }
  }
  cout << ans << endl;
  return 0;
}