using System;
public class Program
{
    static void Main()
    {
        int l = int.Parse(Console.ReadLine());
        int n = int.Parse(Console.ReadLine());
        int[] w = Array.ConvertAll(Console.ReadLine().Split(' '), s => int.Parse(s));
        Array.Sort(w);
        int sum = 0;
        int count = 0;
        foreach (int a in w)
        {
            if (sum + a > l)
            {
                break;
            }
            count++;
            sum += a;
        }
        Console.WriteLine(count);
    }
}