#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main(void){
  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 sum = 0,cnt = 0;
  for(int i=0;i<n;i++){
    sum += v[i];
    if(sum <= l) cnt++;
    else break;
  }
  cout << cnt << endl;
}