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

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int l = sc.nextInt();
		int n = sc.nextInt();
		int w[] = new int[n];

		for (int i = 0; i < w.length; i++) {
			w[i] = sc.nextInt();
		}
		Arrays.sort(w);
		for (int i = 0; i < n; i++) {
			l -= w[i];
			if (l < 0) {
				System.out.println(i);
				break;
			}
		}
	}
}