import java.util.Arrays;
import java.util.Scanner;
	

public class Main{
	
	
	public static void main(String args[])throws Exception{
		
		Scanner sc = new Scanner(System.in);
	
		int L = sc.nextInt();
		int N = sc.nextInt();
		int[] W = new int[N];
		for(int i=0;i<N;i++){
			W[i] = sc.nextInt();
		}
		Arrays.sort(W);
		int ans = 0;
		for(int i=0;i<N;i++){
			L -= W[i];
			if(L>=0){
				ans++;
			}
		}
		System.out.println(ans);
	}
	
}