Problem:
Problem Statement

You are given two integers a and b (a≤b). Determine if the product of the integers a, a+1, …, b is positive, negative or zero.

Constraints

a and b are integers.

-10^9≤a≤b≤10^9

Partial Score

In test cases worth 100 points, -10≤a≤b≤10.

Input

The input is given from Standard Input in the following format:

a b

Output

If the product is positive, print Positive. If it is negative, print Negative. If it is zero, print Zero.

Sample Input 1

1 3

Sample Output 1

Positive

1×2×3=6 is positive.

Sample Input 2

-3 -1

Sample Output 2

Negative

(-3)×(-2)×(-1)=-6 is negative.

Sample Input 3

-1 1

Sample Output 3

Zero

(-1)×0×1=0.

Solution in C++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <iostream>
int main() {
	int a, b;
	std::cin >> a >> b;
	if (a <= 0 && 0 <= b)
		std::cout << "Zero" << std::endl;
	else if (a > 0 && b > 0)
		std::cout << "Positive" << std::endl;
	else if (b < 0) {
		int n = -1 * (a - b - 1);
		if (n % 2 == 0)
			std::cout << "Positive" << std::endl;
		else
			std::cout << "Negative" << std::endl;
	}
}