using System;
using System.Collections.Generic;
public class Hello{
    static void Sort(int[] a){
       
        for(int x = 0;x < a.Length - 1;x++){
            for(int y = x + 1;y < a.Length;y++){
                int temp = 0;
                if(a[x] > a[y]){
                    temp = a[x];
                    a[x] = a[y];
                    a[y] = temp;
                }
            }
        }
     
    }
    public static void Main(){
        int L = int.Parse(Console.ReadLine());
        int N = int.Parse(Console.ReadLine());
        
        string[] input = Console.ReadLine().Split(' ');
        int[] width = new int[N];
        for(int i = 0;i < N;i++){
            width[i] = int.Parse(input[i]);
        }
        Sort(width);
        
        int cap = 0;
        int count = 0;
        while(cap < L){
            cap += width[count];
            count++;
        }
        Console.WriteLine(count - 1);
        
    }
}