import java.util.*;
class main{
    public static void main(String[] args){
        Scanner s=new Scanner (System.in);
        if(!s.hasNextInt()){
            System.out.println("-1");
            return;
        int n=s.nextInt();
        
        if(n>0){
            System.out.println("1");
            return;
        }
        if(n<0){
            System.out.println("0");
            return;
        }
        
        }
    }
}