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

int main(void){
  int w, n;
    cin >> w >> n;
    vector<int> vc(n);
    for(auto &x : vc){
        cin >> x;
    }
    
    sort(vc.begin(),vc.end());

    int count{0}, res{0};
    for(auto x : vc){
        res += x;
        if(res <= w){
            count++;
        }
    }
  
    cout << count << endl;
    
    return 0;
}