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 Python (3.4.3) (judge verdict: Accepted)

import sys
input = sys.stdin.buffer.readline

def main():
    A,B = map(int,input().split())
    if A > 0:
        print("Positive")
    elif A == 0:
        print("Zero")
    else:
        if B >= 0:
            print("Zero")
        else:
            n = B-A+1
            if n%2 == 0:
                print("Positive")
            else:
                print("Negative")
    

if __name__ == "__main__":
    main()