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

using namespace std;

int main(){
  int l,n,i; cin >> l >> n;
  vector<int> w(n);

  for(int &a:w){
    cin >> a;
  }

  sort(w.begin(), w.end());
  for(i=0;i<n;i++){
    l-=w[i];
    if(l<0){break;}
  }
  cout << i << endl;
}