using System;

public class Program

{

    public static void Main()

    {

       double eps = 0.001;

       Console.WriteLine("eps ={0}", eps);

       Console.Write("a=");

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

        double x = a/2.0;

        double xs;

        do

        {

        xs=x;

        Console.WriteLine("x={0}",x);

        }

        while (xs - x >= eps);

        Console.WriteLine("Корен квадратен е: {0}",x);

    }

}