Zver

using System;
using System.Collections;
using System.Text;
using System.Collections.Generic;

namespace TouristAgency
{
    class Client
    {
        private string name;
        private string surename;
        private int age;
        private string destination;
        private int frontDeskNumber;

        public string Name { get { return name; } set { name = value; } }
        public string Surename { get { return surename; } set { surename = value; } }
        public int Age { get { return age; } set { age = value; } }
        public string Destination { get { return destination; } set { destination = value; } }
        public int FrontDeskNumber { get { return frontDeskNumber; } set { frontDeskNumber = value; } }

        public Client(string name, string surename, int age, string destination, int frontDeskNumber)
        {
            this.name = name;
            this.surename = surename;
            this.age = age;
            this.destination = destination;
            this.frontDeskNumber = frontDeskNumber;
        }

        public int getPrice()
        {
            return destination.Length * 2000;
        }
    }

    class FrontDesk
    {
        private int number;
        public List<Client> deskClients;

        public int Number { get { return number; } set { number = value; } }

        public FrontDesk(int number)
        {
            this.number = number;
            deskClients = new List<Client>();
        }

        public void addClient(Client client)
        {
            deskClients.Add(client);
        }

        public int GetClientLength()
        {
            return deskClients.Count;
        }

        public int calculatePrice()
        {
            int suma = 0;
            foreach (Client c in deskClients)
            {
                suma += c.getPrice();
            }
            return suma;
        }

        public string toString()
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("Salter ").Append(number+" :").Append("\n");
            sb.Append(GetClientLength()).Append(" karti").Append("\n");
            return sb.ToString();
        }
    }

    class TouristAgency
    {
        private string name;
        private int numberOfDesks;
        List<Client> clients;
        List<FrontDesk> frontDesks;
        List<String> destinations;

        public TouristAgency(string name, int numberOfDesks)
        {
            this.name = name;
            this.numberOfDesks = numberOfDesks;
            clients = new List<Client>();
            frontDesks = new List<FrontDesk>(numberOfDesks);
            destinations = new List<string>();
            createDestinations();
        }

        public void createDestinations()
        {
            destinations.Add("Rim");
            destinations.Add("London");
            destinations.Add("Tokio");
            destinations.Add("Sofija");
            destinations.Add("Istanbul");
            destinations.Add("Toronto");
            destinations.Add("Majami");
            destinations.Add("Zagreb");
            destinations.Add("Belgrad");
            destinations.Add("Moskva");
        }

        public void ClientService(Client client)
        {
            clients.Add(client);
            if (destinations.Contains(client.Destination))
            {
                if (CheckForDesks(client) == true)
                {
                    FrontDesk fd = CheckIfDeskExists(client.FrontDeskNumber);
                    if (fd == null)
                    {
                        fd = new FrontDesk(client.FrontDeskNumber);
                        fd.addClient(client);
                        frontDesks.Add(fd);
                    }
                    else
                    {
                        fd.addClient(client);
                    }
                }

            }
        }

        public void GetNumberOfClients(int frontDeskNumber)
        {
            FrontDesk fd = CheckIfDeskExists(frontDeskNumber);
            if(fd!=null)
               Console.Write(fd.GetClientLength());
        }

        public void GetPriceFromDesk(int frontDeskNumber)
        {
            FrontDesk fd = CheckIfDeskExists(frontDeskNumber);
            if (fd != null)
                Console.Write(fd.calculatePrice());
        }

        public string toString()
        {
            StringBuilder sb = new StringBuilder();
            foreach (FrontDesk fd in frontDesks)
            {
                sb.Append(fd.toString()).Append("\n");
            }
            return sb.ToString();
        }

        public bool CheckForDesks(Client client)
        {
            if (client.FrontDeskNumber < 0 || client.FrontDeskNumber >= numberOfDesks)
                return false;
            return true;
        }

        public int CalculatePrice()
        {
            int sum = 0;
            foreach(FrontDesk fd in frontDesks)
            {
                sum += fd.calculatePrice();
            }
            return sum;
        }

        public FrontDesk CheckIfDeskExists(int FrontDeskNumber)
        {
            foreach (FrontDesk fd in frontDesks)
            {
                if (fd.Number ==FrontDeskNumber)
                    return fd;
            }
            return null;
        }

        public double success()
        {
            int numDeskClients = 0;

            foreach(FrontDesk fd in frontDesks)
            {
                numDeskClients += fd.GetClientLength();
            }
            return (double)(numDeskClients / clients.Count);
        }

    }

    class Program
    {
        public static void Start(TouristAgency touristAgency)
        {
            while (true)
            {
                int n = int.Parse(Console.ReadLine());

                switch (n)
                {
                    case 1:
                        Client client = ClientParser();
                        touristAgency.ClientService(client);
                        break;
                    case 2:
                        int frontDeskNumber = int.Parse(Console.ReadLine());
                        touristAgency.GetNumberOfClients(frontDeskNumber);
                        break;
                    case 3:
                        int frontDeskNumber1 = int.Parse(Console.ReadLine());
                        touristAgency.GetPriceFromDesk(frontDeskNumber1);
                        break;
                    case 4:
                        Console.Write(touristAgency.toString());
                        break;
                    case 5:
                        Console.Write(touristAgency.CalculatePrice());
                        break;
                    case 6:
                        Console.Write(touristAgency.success());
                        break;
                    case 7:
                        return;
                }
            }
        }

        public static Client ClientParser()
        {
            string name = Console.ReadLine();
            string surename = Console.ReadLine();
            int age = int.Parse(Console.ReadLine());
            string destination = Console.ReadLine();
            int frontDeskNumber = int.Parse(Console.ReadLine());
            Client client = new Client(name, surename, age, destination, frontDeskNumber);
            return client;
        }

        static void Main(string[] args)
        {
            TouristAgency touristAgency = new TouristAgency("World", 5);
            Start(touristAgency);
        }
    }

}