#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int main() {
  int L, N, sum=0, cnt=0;
  cin >> L >> N;
  vector<int> v(N);
  for (int i=0; i<N; i++) {
    cin >> v[i];
  }

  sort(v.begin(), v.end());

  for (int i=0; i<N; i++) {
    if (sum+v[i]<=L) {
      sum+=v[i];
      cnt++;
    }
    else break;
  }

  cout << cnt << endl;
  return 0;
}