using System;
using System.Collections.Generic;
using System.Linq;

class MainClass
{
	public static void Main(string[] args)
	{
	    long x = 0;
	    long i = 0;
	    
	    string stdin = Console.ReadLine();
	    long L = long.Parse(stdin);
	    
	    stdin = Console.ReadLine();
	    long N = long.Parse(stdin);
	    
        stdin = Console.ReadLine();
		string[] c = stdin.Split(' ');
		long[] w = new long[N];
		for(i = 0; i < N; i++){
    		w[i] = long.Parse(c[i]);
		}
		
		Array.Sort(w);
		i = 0;
		while((x <= L) && i < N){
		    x += w[i];
		    i++;
		}
		
		Console.WriteLine(i);
	}
}