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 Scala (2.11.7) (judge verdict: Accepted)

object Main extends App {
	val Array(a, b) = scala.io.StdIn.readLine.split(" ").map(_.toLong)

	if(a > 0L){
		println("Positive")
	}else if(a<=0L && b>=0L){
		println("Zero")
	}else{

		if( (b-a+1L) % 2L == 0L){
			println("Positive")
		}else{
			println("Negative")
		}
	}
	
}