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: Accepted)

using System;
using System.Linq;
using System.Collections.Generic;
public class Hello{
    public static void Main(){
        var input = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
        var a = input[0];
        var b = input[1];
        var ans = "";
        if(1 <= b){
            if(1 <= a){
                ans = "Positive";
            }else{
                ans = "Zero";
            }
        }else if(b == 0){
            ans = "Zero";
        }else{
            if((Math.Abs(a - b) + 1)% 2 == 0){
                ans = "Positive";
            }else{
                ans = "Negative";
            }
        }
        Console.WriteLine(ans);
    }
}