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;

class Program {
  static void Main() {
    var arr = Console.ReadLine().Split().Select(int.Parse).ToArray();
    int a = arr[0];
    int b = arr[1];
    string[] s = { "Positive", "Zero", "Negative" };
    int t = 0;
    if (0 < a && 0 < b) t = 0;
    else if (a <= 0 && 0 <= b) t = 1;
    else if (((b - a + 1) % 2) == 1) t = 2;
    Console.WriteLine(s[t]);
  }
}