import java.util.*;

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

    }
}