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: Wrong Answer)

#include<stdio.h>

int main(void) {
  long int  a, b;
  long int ans;
  scanf("%ld %ld",&a, &b);
  if(b<0){
    ans = (0.5 - ((a - b) % 2)) * (-2);
  } else if(b>=0 && a<=0) {
    ans = 0;
  } else {
    ans = 1;
  }

  switch (ans) {
  case -1:
    printf("Negative\n");
    break;
  case 0:
    printf("Zero\n");
    break;
  case 1:
    printf("Positive\n");
    break;
  }

  return 0;
}