using System;

public class Hello
    {
        public static void Main()
        {
            string line = System.Console.ReadLine().Trim();
            int L = int.Parse(line);
            line = System.Console.ReadLine().Trim();
            int N = int.Parse(line);
            line = System.Console.ReadLine().Trim();
            string[] Data = line.Split(' ');
            int[] block = new int[N];

            for (int i = 0; i < N; i++)
            {
                block[i] = int.Parse(Data[i]);
            }

            Array.Sort(block);

            for (int i = 0; i < N; i++)
            {
                L = L - block[i];

                if(L <0)
                {
                    System.Console.WriteLine(i);
                    return;
                }
            }

            System.Console.WriteLine(N);
            return;
        }
    }