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 Pascal (FPC 2.6.2) (judge verdict: Accepted)

uses math;
var
  i,j,k,n,m,a,b,c,x,y:longint;
begin
     read(a,b);
if (a<=0) and (b>=0) then writeln('Zero')
  else if (a>=0)and(b>=0) then writeln('Positive')
   else if (a<0)and((b-a+1) mod 2=0) then writeln('Positive')
     else writeln('Negative');
  end.