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>
#include<math.h>
 
int main(){
  long long a,b;

  scanf("%lld%lld",&a,&b);

  if(a*b<=0){printf("Zero\n");}
  
  else if(a==b){
    if(a>0){printf("Positive\n");}
    else{printf("Negative\n");}
  }

  else if(a>0){printf("Positive\n");}

  else{
    if((b-a)%2==1){printf("Positive\n");}
    else{printf("Negative\n");}
  }

  return 0;
}