#include <bits/stdc++.h>
using namespace std;
int main(){
  int x, n;
  cin >> x >> n;
  vector <int> arr(n);
  for(auto &ele: arr) cin >> ele;

  sort(arr.begin(), arr.end());
  int ans = 0, tot = 0;
  for(auto ele: arr){
    if(tot + ele <= x){
      tot += ele;
      ans++;
    }
  }

  cout << ans << "\n";

  return 0;
}