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

namespace test20190423
{
    class Program
    {
        static void Main(string[] args)
        {
            var width = int.Parse(Console.ReadLine());
            _ = Console.ReadLine();
            var ss = Console.ReadLine().Split(new String[] { " " }, StringSplitOptions.RemoveEmptyEntries).Select(x => int.Parse(x)).ToList();
            ss.Sort();
            int i = 0;
            for (i = 0; i < ss.Count; i++)
            {
                if (width - ss[i] < 0) break;
                width -= ss[i];
            }
            Console.WriteLine(i);
            Console.ReadLine();
        }
    }
}