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

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int L = scan.nextInt();
		int N = scan.nextInt();
		int list[] = new int[N];
		for(int i=0; i<N; i++) {
			list[i] = scan.nextInt();
		}
		scan.close();
		
		Arrays.sort(list);
		
		int ans = 0;
		int rem = L;
		for(int i=0; i<N; i++) {
			rem = rem - list[i];
			if(rem >= 0) {
				ans++;
			} else {
				break;
			}
		}
		System.out.println(ans);
	}
}