import java.util.*;

class InvalidStockQuantityException extends Exception {
    public InvalidStockQuantityException(String message) {
        super(message);
    }
}

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        try {
            while (sc.hasNext()) {
                String input = sc.next();
                long stockQuantity = Long.parseLong(input);

                if (stockQuantity < 0) {
                    throw new InvalidStockQuantityException("Negative stock");
                }
            }
            // if no errors → all inputs are valid and non-negative
            System.out.println("Payment success");

        } catch (NumberFormatException e) {
            System.out.println(-1);
        } catch (InvalidStockQuantityException e) {
            System.out.println(0);
        } finally {
            sc.close();
        }
    }
}