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

public class Yukicoder {

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

        int[] arrays = new int[n];
        for (int i = 0; i < n; i++) {
            arrays[i] = sc.nextInt();
        }

        Arrays.sort(arrays);

        int sum = 0;
        int count = 0;

        for (int i = 0; i < n; i++) {
            sum += arrays[i];

            if (sum > l) {
                break;
            } else {
                count++;
            }
        }

        System.out.println(count);

        sc.close();
    }

}