using System;

public class Program

{

    public static void Main()

    {

Console.WriteLine("Ввести а=");

double a=double.Parse(Console.ReadLine());

Console.WriteLine("Ввести b=");

double b=double.Parse(Console.ReadLine());

double y=((a+b)*(a+b))/b;

Console.WriteLine("y="+y);

Console.ReadLine();

        Console.WriteLine("Hello World");

    }

}