import java.util.Scanner;
public class Main {

    public static void main(String[] args) {

        Scanner keyboard = new Scanner(System.in);

        double from = -10;
        double to = 10;
        double by = 0.5;


        System.out.println("\n X:        Y: ");
        System.out.println("--------------");


        for (double n = from; n <= to; n = n + by){
            System.out.println( n +  "     "    + n*n);

        }

    }
}