#include<iostream>
using namespace std;

int main(){
  int l,n, i, j, tmp;
  cin >> l >> n;

  int w[n];

  for(i=0;i<n;i++){
    cin >> w[i];
  }
      

  //sort
  for(i=0; i<n;i++){
    for(j=n-1;j>i;j--){
      if(w[i] > w[j]){
	tmp = w[i];
	w[i] = w[j];
	w[j] = tmp;
      }
    }
  }

  int sum = 0;
  i = 0;
  while(1){
    sum += w[i];
    if(l > sum) i++;
    else break;
  }

  cout << i << endl;
  
  return 0;
}