import java.util.*;
class InvalidStockQuantityException extends Exception
 {
        public InvalidStockQuantityException() 
        {
            System.out.print("0");
        }
 }
public class Throw
{
    public static void main(String[] args)
    {
        Scanner sc=new Scanner(System.in);
        try
        {
            int n=sc.nextInt();
            if(n>0)
            {
                System.out.print("1");
            }
            else
            {
                InvalidStockQuantityException in=new InvalidStockQuantityException();
                throw in;
                return;
            }
        }
        catch(Exception e)
        {
            System.out.print("-1");
            return;
        }
    }
}