#include <bits/stdc++.h>
#define rep(i, ss, ee) for (int i = ss; i < ee; ++i)
using namespace std;

int main() {
  int L, N;
  int sum = 0, ans = 0;
  cin >> L >> N;
  vector<int> v(N);
  rep(i, 0, N) { cin >> v[i]; }
  sort(v.begin(), v.end());

  rep(i, 0, N) {
    sum += v[i];
    if (L < sum) {
      break;
    }
    ans++;
  }
  cout << ans << endl;
  getchar();
}