import java.util.*;
class y5 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int i, s = 0, l = sc.nextInt(), n = sc.nextInt();
		int[] w = new int[n];
		for (i=0; i<w.length; i++)	w[i] = sc.nextInt();
		Arrays.sort(w);
		for (i=0; i<w.length; i++) {
			s += w[i];
			if (s>l)	break;
		}
		System.out.println(i);
	}
}