import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner keyboard = new Scanner(System.in);
        System.out.println("x        y");
        System.out.println("----------------");

double y;
        for ( double x = -10 ; x <= 10 ; x = x+0.5 ) {
            y = x * x;
            System.out.println(x + " \t" + y);
        }






    }
}