import java.util.Scanner;
public class Ssd{
public static void main(String[] args) {
Scanner s=new Scanner(System.in);
int aaa=s.nextInt();
System.out.println(aaa*aaa);
}
}
public class Ssd{
public static void main(String[] args) {
Scanner s=new Scanner(System.in);
int aaa=s.nextInt();
System.out.println(aaa*aaa);
}
}