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 (2.7.6) (judge verdict: Time Limit Exceeded)

# -*- coding: utf-8 -*-

# スペース区切りの整数の入力
a, b = map(int, raw_input().split())
list1=[]
d=b-a
for i in xrange(d+1):
    list1.append(a+i)
s=1
for i in list1:
    s=s*i
if s<0:
    print "Negative"
elif s==0:
    print "Zero"
else:
    print "Positive"