//
//  main.cpp
//  yukicoder
//
//  Created by Shuntaro Takahashi on 3/16/16.
//  Copyright © 2016 Kuphony. All rights reserved.
//

#include <iostream>
#include <algorithm>

int main(int argc, const char * argv[]) {
    int l;
    std::cin >> l;
    int n;
    std::cin >> n;
    int w[l];
    //配列の取得
    for (int i = 0; i < n; i++) {
        std::cin >> w[i];
    }
    std::sort(w,w+n);
    int result = 0;
    int tmp = 0;
    for (int i = 0; i < n; i++) {
        tmp += w[i];
        if(tmp <= l){
            result++;
        }
    }
    std::cout << result;
    std::cout << "\n";
    return 0;
}