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

int main()
{

  int l, n;
  cin >> l >> n;
  int a[n];
  for(int i = 0 ; i < n; i++) cin >> a[i];

  sort(a, a+n);

  int sum = 0;
  int i = 0;
  int cnt = 0;
  do{
    sum = sum + a[i];
    if (sum > l) break;
    i++;
    cnt++;
    if (i==n) break;
  }while (sum <= l);
  cout << cnt << endl;
}