using System;

class Yukicoder005{
	public static void Main(string[] args){
		int L = int.Parse(Console.ReadLine());
		int N = int.Parse(Console.ReadLine());
		string[] W = Console.ReadLine().Split(' ');
		int[] sort = new int[N];
		int Eva;
		int count = 0;
		int a;

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

		for(int j = 0; j < N; j++){
			for(int K = N-1; K > 0; K--){
				if(sort[K] < sort[K-1]){
					Eva = sort[K];
					sort[K] = sort[K-1];
					sort[K-1] = Eva;
				}
			}
		}
		for(a = 0; a < N; a++){
			count += sort[a];
			if(count > L){
				break;			
			}
		}

		Console.WriteLine(a);


	}
}