using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace foryuki
{
    class Program
    {
        static void Main(string[] args)
        {
            int L = int.Parse(Console.ReadLine());
            int N = int.Parse(Console.ReadLine());
            var W = ConvertStringArrayToIntArray(Console.ReadLine().Split());
            Array.Sort(W);
            int i = 0;
            int width = 0;

            while (width < L && i < N)
            {
                width += W[i];
                i++;
            }

            if (width > L) i -= 1;
            Console.WriteLine(i);
        }

        //-------------------------------------------------------------

        static int[] ConvertStringArrayToIntArray(string[] array)
        {
            return Array.ConvertAll(array, str => int.Parse(str));
        }

        static List<int> ConvertStringArrayToIntList(string[] str)
        {
            var list = new List<int>();
            foreach (var c in str)
            {
                list.Add(int.Parse(c));
            }
            return list;
        }
    }
}