using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int L = int.Parse(Console.ReadLine());
            int N = int.Parse(Console.ReadLine());
            int count = 0;
            string[] strW = Console.ReadLine().Split(' ');
            int[] W = new int[N];
            for (int i = 0; i < N; i++)
            {
                W[i] = int.Parse(strW[i]);
            }
            Array.Sort(W);
            while (count < N)
            {
                L = L - W[count];
                if (L < 0)
                {
                    break;
                }
                count++;
            }
            Console.WriteLine(count);
        }
    }
}