import java.util.*;
public class NewProgram {
static Scanner scanner = new Scanner(System.in);
public static void main(String args[]) {
int x = 0;
x = scanner.nextInt();
System.out.println(x * x);
}
}
import java.util.*;
public class NewProgram {
static Scanner scanner = new Scanner(System.in);
public static void main(String args[]) {
int x = 0;
x = scanner.nextInt();
System.out.println(x * x);
}
}