using System;
using System.Collections.Generic;
using System.Linq;

namespace lecture
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            int L = int.Parse(Console.ReadLine());
            int N = int.Parse(Console.ReadLine());
            int[] W = Console.ReadLine().Trim().Split(' ').Select(x => int.Parse(x)).ToArray();


            int kazu = 0;
            int count = 0;
            Array.Sort(W);
            for (int i = 0; i < N; i++)
            {
               
                if (L <= kazu)
                {
                    count--;
                    break;
                }
                kazu += W[i];
                count++;

                
              
          }

            Console.WriteLine(count);

         


        }
    }
}