multiplication_sign_without_multiplying

def multipl_sign(num1, num2, num3):
    num_list = [num1, num2, num3]
    if len(list(filter(lambda x: x == 0, num_list))) >= 1:
        return "zero"
    elif len(list(filter(lambda x: x < 0, num_list))) == 1 or len(list(filter(lambda x: x < 0, num_list))) == 3:
        return "negative"
    elif len(list(filter(lambda x: x > 0, num_list))) == 1 or len(list(filter(lambda x: x > 0, num_list))) == 3:
        return "positive"


number1 = int(input())
number2 = int(input())
number3 = int(input())

print(multipl_sign(number1, number2, number3))