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

namespace Program
{
    class Program
    {
        static void Main(string[] args)
        {
            var maxWidth = int.Parse(Console.ReadLine());
            var blockNumber = int.Parse(Console.ReadLine());
            var blocks = Console.ReadLine().Split(' ').Select(s => int.Parse(s)).ToList();
            blocks.Sort();
            int sumWidth = 0, i = 0;
            foreach(int block in blocks) {
                sumWidth += block;
                if(maxWidth < sumWidth)
                    break;
                i++;
            }
            Console.WriteLine(i);
        }
    }
}