using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    class Client

    {

        private static int counter;

        private static Random rand = new Random();

        public int Number { get; private set; }

​

        public int ServiceTime { get; private set; }

​

        public Client()

        {

            counter++;

            Number = counter;

            ServiceTime = rand.Next(1, 5);

        }

    }

​

    public static void Main()

    {

        Queue<Client> clients = new Queue<Client>();

        int totalTime = 0;

        while (true)

        {

            string input = Console.ReadLine();

            if (input == "exit")

            {

                break;

            }

            else if (input == "add")

            {

                Client client = new Client();

                clients.Enqueue(client);

                Console.WriteLine("Client {0} added to queue, Estimaed wait time {1} minutes", client.Number, client.ServiceTime);

            }

            else if (input == "next")

            {

                if (clients.Count == 0)

                {

                    Console.WriteLine("No clients");

                }

                else

                {

                    Client currentClient = new Client();

                    totalTime += currentClient.ServiceTime;

                    Console.WriteLine("Client {0} serviced time: {1} minutes", currentClient.Number, currentClient.ServiceTime);

                }

            }

            else if(input == "count")

            {

            Console.WriteLine("Count of clients is {0}",clients.Count);

                Console.WriteLine("Total time is {0}", totalTime + "Minutes");

            }

        }

    }

}