using System;
using System.Collections;

class Class1
{
    static void Main()
    {
        //パターンのカウント
        int count = 0;
        int max = 0;

        //値の入力
        int bigbox = int.Parse(Console.ReadLine());
        int smallbox_height = int.Parse(Console.ReadLine());
        string[] small_boxs = Console.ReadLine().Split(' ');

        ArrayList List = new ArrayList();
        for(int i = 0;i<small_boxs.Length;i++) List.Add(int.Parse(small_boxs[i]));
        List.Sort();

        foreach(int i in List)
        {
            if(bigbox > max){
                max += (int)i;
                count++;
            }else{
                break;
            }
        }

        Console.WriteLine(count-1);
    }
}