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++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<bits/stdc++.h>
#define ll long long
#define reg register
using namespace std;
ll a,b;
inline void read(ll &x)
{
    x=0;
    reg char ch=getchar();
    while(ch>'9'||ch<'0')ch=getchar();
    while(ch>='0'&&ch<='9')x=x*10+ch-'0',ch=getchar();
}
int main()
{
    read(a);read(b);
    if(a>0)puts("Positive");
    else if(b>=0)puts("Zero");
    else if((a&1)^(b&1))puts("Positive");
    else puts("Negative");
//    puts(a>0?"Positive":(b>=0?"Zero":((a&1)^(b&1)?"Positive":"Negative")));
    return 0;
}//会收到回复i还是对八年