using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(Math.Floor(4.9999 * 100) / 100);      

        Console.WriteLine(Math.Floor(-4.9999 * 100) / 100);

        Console.WriteLine(Math.Floor(Math.Abs(-4.9999) * 100) / 100 * Math.Sign(-4.9999));

​

    }

}