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

int main(){
    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 count = 0;
    for(int i = 0; i < n; ++i){
        if(l - v[i] > 0){
            ++count;
            l -= v[i];
        }else{
            break;
        }
    }
    
    cout << count << endl;
    
    
    return 0;
}