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 C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System; using System.Linq;

class A {
	static void Main() {
		var n = Console.ReadLine().Split().Select(int.Parse).ToArray();
		if(n[0] > 0) {
			Console.WriteLine("Positive");
		} else if(n[0] <= 0 && n[0] + n[1] >= 0) {
			Console.WriteLine("Zero");
		} else if(n[1] % 2 == 0) {
			Console.WriteLine("Positive");
		} else {
			Console.WriteLine("Negative");
		}
	}
}