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

namespace YukiCoderNo6
{
    class Program
    {
        static void Main()
        {
            int maxLength = int.Parse(Console.ReadLine());
            int blockCount = int.Parse(Console.ReadLine());
            var blockLength = (Console.ReadLine()).Split(' ').Select(value => int.Parse(value)).OrderBy(value => value);
            int nowBlockLength = 0;
            int maxBlockCount = 0;

            foreach (int buffer in blockLength)
            {
                nowBlockLength += buffer;
                if (nowBlockLength <= maxLength)
                {
                    maxBlockCount++;
                }
                else
                {
                    break;
                }
            }
            Console.WriteLine("{0}", maxBlockCount);
        }
    }
}