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

class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int l = scan.nextInt();
        int n = scan.nextInt();
        int[] w = new int[n];
        for (int i = 0; i < n; i++) {
            w[i] = scan.nextInt();
        }
        Arrays.sort(w);
        int cnt = 0;
        for (int v : w) {
            l -= v;
            if (l < 0) {
                break;
            } else {
                cnt++;
            }
        }
        System.out.println(cnt);
        scan.close();
    }
}