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<iostream>
using namespace std;

long long a1,b,a=1;

int main(){
	cin>>a1>>b;
	for(int i=a1;i<=b;i++) a*=i;
	if(a<0) cout<<"Negative"<<endl;
	else if(a==0) cout<<"Zero"<<endl;
	else if(a>0) cout<<"Positive"<<endl;
	return 0;
}