import java.util.Scanner;

public class MathFunctions $\{$

public static void main $($String $[]$ args$)\{$

Scanner scnr $=$ new Scanner$($System$.$in$)$;

double x;

double y;

double z;

x $=$ scnr$.$nextDouble$()$;

y $=$ scnr$.$nextDouble$()$;

z $=$ Math.sqrt$(4\mathrm{.}0/3\mathrm{.}0)$;

System.out.printf$("\%\mathrm{.}1$f

$",$ z$)$; $//$ This will output z with $1$ decimal place.

$\}$

$\}$