Почивката на Дядо Коледа: Santas Holiday

using System;

namespace tESt
{
    class Program
    {
        static void Main(string[] args)
        {
            var days = double.Parse(Console.ReadLine());
            var type = Console.ReadLine().ToLower();
            var evaluation = Console.ReadLine().ToLower();

            double price = 0;

            if (days < 10)
            {
                if (type == "room for one person")
                {
                    price = days * 18;
                }
                else if (type == "apartment")
                {
                    price = (days - 1) * 25  * 0.70;
                }
                else if (type == "president apartment")
                {
                    price = (days - 1) * 35  * 0.90;
                }
            }
            else if (days >= 10  && days <= 15)
            {
                if (type == "room for one person")
                {
                    price = (days - 1) * 18;
                }
                else if (type == "apartment")
                {
                    price = (days - 1) * 25 * 0.65;
                }
                else if (type == "president apartment")
                {
                    price = (days - 1) * 35 * 0.85;
                }
            }
            else if (days >= 15)
            {
                if (type == "room for one person")
                {
                    price = (days-1) * 18;
                }
                else if (type == "apartment")
                {
                    price = (days - 1) * 25  * 0.50;
                }
                else if (type == "president apartment")
                {
                    price = (days - 1) * 35 * 0.80;
                }
            }

            if (evaluation == "positive")
            {
                price = price + (price * 0.25);
            }
            if (evaluation == "negative")
            {
                price = price - (price * 0.10);
            }
            Console.WriteLine($"{price:f2}");
        }
    }
}