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();
        }

        int h = w.length;
        while (h >= 1) {
            h >>= 1;
            for (int i = 0; i < w.length - h; i++) {
                if (w[i] > w[i + h]) {
                    int tmp = w[i];
                    w[i] = w[i + h];
                    w[i + h] = tmp;
                }
            }
        }

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