using System;

namespace yukicoder
{
    class Program
    {
        static void Main(string[] args)
        {
            //大きな箱の幅
            int L = int.Parse(Console.ReadLine());
            //箱の数
            int N = int.Parse(Console.ReadLine());

            string[] str = Console.ReadLine().Split(' ');

            int[] a = new int[str.Length];
            //各箱の幅
            for (int i = 0; i < a.Length; i++)
            {
               int W = int.Parse(str[i]);
                a[i] = W;
            }

            //小さい順
            for (int j = 0; j < a.Length; j++)
            {
                if(j==a.Length)
                {
                    a[j] = a.Length;
                }
                for (int i = 0; i < j; i++)
                {
                    if (a[i] > a[i + 1])
                    {
                        int temp = a[i];
                        a[i] = a[i + 1];
                        a[i + 1] = temp;
                    }


                }
            }

            //判定
            int num = L;
            int count = 0;
            for (int i = 0; i < str.Length; i++)
            {
                if (num >= 0 && num >= a[i])
                {
                    num = num - a[i];
                    count++;
                }

            }

            Console.WriteLine(count.ToString());





        }
    }
}