using System;
using System.IO;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Numerics;
using System.Diagnostics;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using static System.Math;
using static System.Console;


namespace yukicoder
{
    class Program
    {
        static void Main()
        {
            int L = int.Parse(Console.ReadLine());
            int N = int.Parse(Console.ReadLine());
            int[] W = Console.ReadLine().Split().Select(int.Parse).ToArray();
            Array.Sort(W);
            int n = 0;
            int cnt = 0;

            for (int i = 0; i < N; i++)
            {
                n += W[i];

                if (n > L)
                {
                    Console.WriteLine(cnt);
                    return;
                }

                cnt++;
            }

            Console.WriteLine(cnt);
        }
    }
}