import java.util.Scanner;

public class hom3 {


    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("Podaj liczbe produktów: ");
        int quantity = sc.nextInt();
        if (quantity ==0){
            System.out.println("Podaj liczbe produktów: ");
            int quantity1 = sc.nextInt();
        }
        int quantity=quantity1;
        System.out.println(quantity);
    }
}