import java.util.Scanner;
import java.util.List;
import java.util.ArrayList;
import java.util.Collections;

class Main {
    
    public static void main(String[] args) {
        
        No0005 no = new No0005();

        System.out.println(no.result());
        
    }
    
}

class No0005 {
    private int l;
    private int n;
    private List<Integer> w;
    private int result;
    
    public No0005() {
        Scanner sc = new Scanner(System.in);
        this.l = sc.nextInt();
        this.n = sc.nextInt();
        this.w = new ArrayList<>(this.n);
        String[] w = sc.next().split(" ");
        for (String str : w) {
            this.w.add(Integer.parseInt(str));
        }
        Collections.sort(this.w);
        int totalW = 0;
        for (Integer i : this.w) {
            totalW += i;
            if (totalW > this.l) {
                break;
            }
            this.result++;
        }
    }
    
    public String result() {
        return String.valueOf(this.result);
    }
}