using System;

​

public class Program

{

    static private double hyp(double a, double b)

    {

        double a2 = a * a;

        double b2 = b * b;

        return Math.Sqrt(a2 + b2);

    }

​

    static private double leg(double a, double c)

    {

        double a2 = a * a;

        double c2 = c * c;

        return Math.Sqrt(c2 - a2);

    }

​

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}