using System;

​

public class Program

{

    public static void Main()

    {

​

​

​

        Random rand = new Random();

        Console.WriteLine("Класс А\n");

        for(int i  = 0; i < 20; i++){

        int first = 10;

        int second = rand.Next(256);

        int third = rand.Next(256);

        int four = rand.Next(256);

        Console.WriteLine("10."+ second  + "." + third + "." + four  );

​

        Console.WriteLine(convert(Convert.ToString(first, 2)) +  "." + convert(Convert.ToString(second, 2)) + "." + convert(Convert.ToString(third, 2)) + "." +convert(Convert.ToString(four, 2)) );

        }

        Console.WriteLine("\nКласс В\n");   

        for(int i  = 0; i < 20; i++){

                int first = rand.Next(63) + 128;

            int second = rand.Next(256);

        int third = rand.Next(256);

        int four = rand.Next(256);

            Console.WriteLine(first + "." + second  + "." + third + "." + four  );

            Console.WriteLine(convert(Convert.ToString(first, 2)) +  "." + convert(Convert.ToString(second, 2)) + "." + convert(Convert.ToString(third, 2)) + "." +convert(Convert.ToString(four, 2)) );

        }

            Console.WriteLine("\nКласс C\n");   

        for(int i  = 0; i < 20; i++){

                int first = rand.Next(31) + 193;

            int second = rand.Next(256);

        int third = rand.Next(256);

        int four = rand.Next(256);

            Console.WriteLine(first + "." + second  + "." + third + "." + four  );

            Console.WriteLine(convert(Convert.ToString(first, 2)) +  "." + convert(Convert.ToString(second, 2)) + "." + convert(Convert.ToString(third, 2)) + "." +convert(Convert.ToString(four, 2)) );

        }

    }

    public static string convert(string value){

            if(value.Length == 0){

            value = "00000000";

            }

            else if(value.Length == 1){

            value = "0000000" + value;

            }

            else if(value.Length == 2){

                value = "000000" + value;

            }

            else if(value.Length == 3){

            value = "00000" + value;

            }

            else if(value.Length == 4){

            value = "0000" + value;

            }

            else if(value.Length == 5){

            value= "000" + value;

            }

            else if(value.Length == 6){

            value = "00" + value;

            }

            else if(value.Length == 7){

            value = "0" + value;

            }

        return value;

    }

}

​