using System;
namespace csharptest
{
    class Program
    {
        static void Main(string[] args)
        {
            int l = int.Parse(Console.ReadLine());
            int n = int.Parse(Console.ReadLine());
            int[] w = new int[n];
            string[] str = Console.ReadLine().Split(' ');
            if (str.Length == 1)
                Console.WriteLine(1);
            else
            {
                for (int m = 0; m < str.Length; m++)
                {
                    w[m] = int.Parse(str[m]);
                }
                Array.Sort(w);
                int count = -1, box = 0;
                while (l >= box || count == n)
                {
                    count++;
                    box += w[count];
                }
                Console.WriteLine(count);
            }
        }
    }
}