// Page 064

import java.util.Scanner;

class Prog_5_4
{
	public static void main(String[] args)
	{

			Scanner input = new Scanner (System.in);
			double x = input.nextDouble();
			if ( x > 0 )
				System.out.println("Positive.");
			else if ( x < 0 )
				System.out.println("Negative.");
			else
				System.out.println("Zero.");



	}
}