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 Ruby (2.3.3) (judge verdict: Wrong Answer)

a,b = gets.split(' ').map(&:to_i)
ans = 1
count = 0

if (a < 0)&&(b > 0)
	puts 'Zero'
elsif(a > 0)&&(b > 0)
	puts 'Positive'
elsif(b < 0)
	count = 0
	while(b > 0)
		b -= 1
		count += 1
	end
	if count.even?
		puts 'Positive'
	else
		puts 'Negative'
	end
end