using System;
using System.Linq;

class Program
{
    public void Solve()
    {
        int L = int.Parse(Console.ReadLine());
        int N = int.Parse(Console.ReadLine());
        int[] W = Console.ReadLine().Split(' ').Select(s => int.Parse(s)).ToArray();

        Array.Sort(W);

        int cnt = 0;
        int sum = 0;
        foreach (var w in W)
        {
            sum += w;
            if (sum > L) break;
            cnt++;
        }
        Console.WriteLine(cnt);
    }

    static void Main()
    {
        var solver = new Program();
        solver.Solve();
    }
}