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;

namespace agc002A
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            string[] str = Console.ReadLine().Split();
            int[] A = new int[2];
            A[0] = int.Parse(str[0]);
            A[1] = int.Parse(str[1]);
            Array.Sort(A);
            if (A[0] > 0 && A[1] > 0)
                Console.WriteLine("Positive");
            else if (A[0] == 0 || A[1] == 0)
                Console.WriteLine("Zero");
            else if ((A[0] < 0 && A[1] > 0) || (A[0] > 0 && A[1] < 0))
                Console.WriteLine("Zero");
            else if (A[1] < 0 && (A[1] - A[0]) % 2 == 0)
                Console.WriteLine("Negative");
            else if (A[1] < 0 && (A[1] - A[0]) % 2 == 1)
                Console.WriteLine("Positive");
        }
    }
}