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)

from sys import stdin

def main():
	a,b = [int(x) for x in stdin.readline().strip().split()]
	if a == 0 or b == 0 or ( a < 0 and b > 0):
		print("Zero")
	elif a > 0 and b > 0 or (a == b):
		print("Positive")
	else:
		val = abs(abs(b)-abs(a))
		if val%2 == 0 :
			print("Negative")
		else:
			print("Positive")
main()