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;
public class AGC002
{
  public static void Main()
  {
    bool zeroexists=false;
    long minuscount=0;
    long[]ab=Console.ReadLine().Split(' ').Select(long.Parse).ToArray();
    if(ab[0]<=0&&ab[1]>=0)zeroexists=true;
    else if(ab[0]<0&&ab[1]<0)minuscount=(ab[1]-ab[0]+1);
    if(zeroexists)Console.WriteLine("Zero");
    else if(minuscount%2==0)Console.WriteLine("Positive");
    else Console.WriteLine("Negative");
  }
}