using System;
using System.Linq;
using System.Collections.Generic;
using System.Text;
using static System.Console;
using static System.Math;

class Program
{
    static void Main(string[] args)
    {
        int L = ReadLineParseInt();
        int N = ReadLineParseInt();
        int[] W = ReadLine().Split(" ").Select(int.Parse).ToArray();
        Array.Sort(W);
        int count = 0;
        for(int i = 0; i < W.Length; i++)
        {
            count += W[i];
            if(count > L)
            {
                WriteLine(i);
                return;
            }
        }
        WriteLine(N);
    }
    static int ReadLineParseInt() => int.Parse(ReadLine());
}