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 (GCC 5.4.1) (judge verdict: Accepted)

#include<stdio.h>

int main(void)
{
  int a,b,many=0;
  scanf("%d %d",&a,&b);
  if(a<=0 && b>=0)
    {
      printf("Zero\n");
      return 0;
    }
  else if(a>0 && b>0)
    {
      printf("Positive\n");
      return 0;
    }
  else
    {
      many = b-a+1;
      if(many%2 == 0)
	{
	  printf("Positive\n");
	  return 0;
	}
      else
	{
	  printf("Negative\n");
	  return 0;
	}
    }
}