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

public class No5 {

    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int length = s.nextInt();
        int count = s.nextInt();
        int[] arr = new int[count];
        for (int i = 0; i < count; i++) {
            arr[i] = s.nextInt();
        }
        Arrays.sort(arr);
        int sum = 0;
        for (int i = 0; i < count; i++) {
            sum += arr[i];
            if (sum > length) {
                System.out.println(i);
                return;
            }
        }
        System.out.println(count);
    }
}