using System;

namespace No._5
{
    class Program
    {
        static void Main(string[] args)
        {
            int L = int.Parse(Console.ReadLine());
            int N = int.Parse(Console.ReadLine());
            var width = Array.ConvertAll(Console.ReadLine().Split(' '), int.Parse);
            Array.Sort(width);
            int weight = 0;

            int count = 0;
            for (var i = 0; i < N; i++)
            {
                weight += width[i];
                if (weight <= L) count++;
                else break;
            }
            Console.WriteLine(count);
        }
    }
}