print("Hello!")

number = int(input("Please enter a number (-1 to exit).... "))
print("{0}" .format (number))

total = 0 + number

 


while number > -1 :
    number = int(input("Please enter a number (-1 to exit).... "))
    print("{0}" .format (number))

    total = total + number
    
    if number < -1 :
        print("You cannot enter a negative number")
        total = total - number
        number = int(input("Please enter a number (-1 to exit).... "))
        total = total - number
        print("{0}" .format (number))
        
        
    
    if number == -1 :
            total = total - 1
            print("Your total is {0}" .format (total))
            print("Goodbye")