03. MobileOperator

using System;

namespace _03._Mobile_operator
{
    class Program
    {
        static void Main(string[] args)
        {
            string contractExpire = Console.ReadLine();
            string contractType = Console.ReadLine();
            string mobileInternet = Console.ReadLine();
            int months = int.Parse(Console.ReadLine());
            double price = 0;

            switch (contractType)
            {
                case "Small":
                    if (contractExpire == "one")
                    {
                        price = 9.98;
                    }
                    else
                    {
                        price = 8.58;
                    }
                        break;
                case "Middle":
                    if (contractExpire == "one")
                    {
                        price = 18.99;
                    }
                    else
                    {
                        price = 17.09;
                    }
                    break;
                case "Large":
                    if (contractExpire == "one")
                    {
                        price = 25.98;
                    }
                    else
                    {
                        price = 23.59;
                    }
                    break;
                case "ExtraLarge":
                    if (contractExpire == "one")
                    {
                        price = 35.99;
                    }
                    else
                    {
                        price = 31.79;
                    }
                    break;
            }

            switch (mobileInternet)
            {
                case "yes":
                if (price <= 10)
                {
                    price += 5.50;
                }
                else if (price > 10 && price <= 30)
                {
                    price += 4.35;
                }
                else
                {
                    price += 3.85;
                }
                break;
            }

            double totalPrice = price * months;

            if (contractExpire == "two" )
            {
                totalPrice *= 0.9625;
                Console.WriteLine($"{totalPrice:f2} lv.");
            }
            else
            {
                Console.WriteLine($"{totalPrice:f2} lv.");
            }
        }
    }
}