using System;


namespace App
{
    class Program
    {
        static void Main(string[] args)
        {
            double host;

            String mascara;

            Console.Write("Digita a mascara:  \n ");
            mascara = Console.ReadLine();
            String[] listaOctetosTexto = mascara.Split('.');

            if (listaOctetosTexto[0] == "255" && listaOctetosTexto[1] == "255" && listaOctetosTexto[2] == "255")
            {
                Console.WriteLine("Mascara Classe C");
                host = Math.Pow(2, 8) - 2;
                Console.WriteLine("Host  " + host);
            }
            else if (listaOctetosTexto[0] == "255" && listaOctetosTexto[1] == "255" && listaOctetosTexto[2] != "255")
            {
                Console.WriteLine("Mascara Classe B");
                host = Math.Pow(2, 16) - 2;
                Console.WriteLine("  Host   " + host);
            }
            else if (listaOctetosTexto[0] == "255" && listaOctetosTexto[1] != "255" && listaOctetosTexto[2] != "255")
            {
                Console.WriteLine("Mascara Classe A");
                host = Math.Pow(2, 24) - 2;
                Console.WriteLine("Host   " + host);
            }


            //a = primeirocteto % 2;
            //aux = primeirocteto / 2;
            //b = aux % 2;
            //aux = aux / 2;
            //c = aux % 2;
            //aux = aux / 2;
            //d = aux % 2;
            //aux = aux / 2;
            //e = aux % 2;
            //aux = aux / 2;
            //f = aux % 2;
            //aux = aux / 2;
            //g = aux % 2;
            //aux = aux / 2;
            //h = aux % 2;
            //i = segunocteto % 2;
            //aux = segunocteto / 2;
            //j = aux % 2;
            //aux = aux / 2;
            //k = aux % 2;
            //aux = aux / 2;
            //l = aux % 2;
            //aux = aux / 2;
            //m = aux % 2;
            //aux = aux / 2;
            //n = aux % 2;
            //aux = aux / 2;
            //o = aux % 2;
            //aux = aux / 2;
            //p = aux % 2;


            //q = terceirocteto % 2;
            //aux = terceirocteto / 2;
            //r = aux % 2;
            //aux = aux / 2;
            //s = aux % 2;
            //aux = aux / 2;
            //t = aux % 2;
            //aux = aux / 2;
            //u = aux % 2;
            //aux = aux / 2;
            //v = aux % 2;
            //aux = aux / 2;
            //w = aux % 2;
            //aux = aux / 2;
            //x = aux % 2;


            //ab = quartocteto % 2;
            //aux = quartocteto / 2;
            //ac = aux % 2;
            //aux = aux / 2;
            //ad = aux % 2;
            //aux = aux / 2;
            //ae = aux % 2;
            //aux = aux / 2;
            //af = aux % 2;
            //aux = aux / 2;
            //ag = aux % 2;
            //aux = aux / 2;
            //ah = aux % 2;
            //aux = aux / 2;
            //ai = aux % 2;


            //Console.WriteLine("mascara  " + h + g + f + e + d + c + b + a + "." + p + o + n + m + l + k + j + i + "." + x + w + v + u + t + s + r + q + "." + ai + ah + ag + af + ae + ad + ac + ab);







            Console.ReadKey();




        }
    }
}