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.Collections.Generic;
using System.Linq;
using System.Text;

namespace AGC002
{
    public class A
    {
        private void Run()
        {
            var input = Console.ReadLine().Trim().Split();
            var A = long.Parse(input[0]);
            var B = long.Parse(input[1]);
            if (A <= 0 && 0 <= B) { Console.WriteLine("Zero "); }
            else if (0 < A) { Console.WriteLine("Positive"); }
            else { Console.WriteLine((B - A) % 2 == 0 ? "Negative" : "Positive"); }
        }

        public static void Main()
        {
            var old = Console.Out;
            using (var writer = new System.IO.StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false })
            {
                Console.SetOut(writer);
                new A().Run();
                Console.Out.Flush();
                Console.SetOut(old);
            }
        }
    }
}