#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;
  int i = 0;
  while ( sum <= l ){
  	sum = sum + a[i];
  	i = i + 1;
  }
  
  cout << i - 1 << endl;
}