using System;
public class Program{
    public static void Main(){
                   int width = int.Parse(Console.ReadLine() ?? string.Empty);
            int block = int.Parse(Console.ReadLine() ?? string.Empty);
            string[] blockWidth = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');

            for (int i = 0; i < block; i++)
            {
                for (int j = 0; j < block - 1; j++)
                {
                    if (int.Parse(blockWidth[j]) > int.Parse(blockWidth[j + 1]))
                    {
                        string box = blockWidth[j];
                        blockWidth[j] = blockWidth[j + 1];
                        blockWidth[j + 1] = box;
                    }
                }
            }
            int count = 0;
            for (int i = 0; i < block; i++)
            {
                width = width - int.Parse(blockWidth[i]);
                if (width < 0)
                {

                    break;
                }
                count++;
            }
            Console.WriteLine("{0}", count);

    }
}