using System;
using System.Linq;

namespace yukicoder
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var L = int.Parse(Console.ReadLine());
            var N = int.Parse(Console.ReadLine());
            var inputs = Console.ReadLine().Split().Select(int.Parse).ToArray();

            var sorted = inputs.OrderBy(x => x).ToArray();

            int sum = 0;
            int count = 0;
            foreach (var item in sorted)
            {
                sum += item;

                if(sum > L)
                {
                    break;
                }

                count++;
            }

            Console.WriteLine(count);
        }
    }
}