using System;

public class Program

{

    public static void Main()

    {

        string input;

            string answer;

            int inputNumber;

            int diameter;

            int length;

            int width;

            int total;

​

            do

            {

                Console.Clear();

                Console.WriteLine("Cigarette Packing.");

                Console.Write("Enter diameter of cigarette: ");

                input = Console.ReadLine();

                total = 0;

​

                if (Int32.TryParse(input, out inputNumber) == true)

                {

                    diameter = inputNumber;

                    if (diameter <= 2)

                    {

                        if (diameter >= 1)

                        {

                            Console.Write("Enter dimension value one: ");

                            input = Console.ReadLine();

                            if (Int32.TryParse(input, out inputNumber) == true)

                            {

                                length = inputNumber;

                                if (length >= diameter)

                                {

                                    Console.Write("Enter dimension value two:  ");

                                    input = Console.ReadLine();

                                    if (Int32.TryParse(input, out inputNumber) == true)

                                    {

                                        width = inputNumber;

                                        if (width >= diameter)

                                        {

                                                total = (length / diameter) * (width / diameter);

                                                Console.WriteLine("Maximum number of cigarettes to be packed: ", total);       

                                        }

                                        else

                                        {

                                            Console.WriteLine("Invalid dimension two.");

                                        }

                                    }

                                    else

                                    {

                                        Console.WriteLine("Invalid dimension two.");

                                    }

                                }

                                else

                                {

                                    Console.WriteLine("Invalid dimension one.");

                                }

                            }

                            else

                            {

                                Console.WriteLine("Invalid dimension one.");

                            }

                        }

                        else

                        {

                            Console.WriteLine("Invalid diameter.");

                        }

                    }

                    else

                    {

                        Console.WriteLine("Invalid diameter.");

                    }

                }

                else

                {

                    Console.WriteLine("Invalid diameter.");

                }

                Console.Write("\nDo you want to try again? [Y/y]: ");

                answer = Console.ReadLine();

            } while ((answer == "Y") || (answer == "y"));

            Console.WriteLine("End of the program. Press any key to exit.");

        }

    }

​

​