#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main()
{
  int l,n;
  cin >> l >> n;
  vector<int> v(n);
  for(int i=0; i<n; i++) cin >> v[i];
  sort(v.begin(), v.end());
  int i = 0, sum = 0;
  while(i < n){
    sum += v[i];
    if(sum > l) break;
    i++;
  }
  cout << i << endl;
  return 0;
}