03. Santas Holiday

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace exam
{
    class Program
    {
        static void Main(string[] args)
        {
            int days = int.Parse(Console.ReadLine());
            string room = Console.ReadLine();
            string grade = Console.ReadLine();
            double roomOne = 18.00;
            double apartment = 25.00;
            double president = 35.00;
            double discount = 0;
            double all = 0;
            int nights = days - 1;

            if (room== "room for one person")
            {

                if ((days < 10) || (days >= 10 && days <= 15) || (days > 15))
                {
                     discount = nights * roomOne;
                }

            }
            if (room == "apartment")
            {
                if (days<10)
                {
                    double priceNights = nights * apartment;
                     discount = priceNights * 0.7;
                }
                else if (days>=10 && days<=15)
                {
                    double priceNights = nights * apartment;
                   double  discount2 = priceNights * 0.35;
                    discount = priceNights - discount2;
                }
                else if (days>15)
                {
                    double priceNights = nights * apartment;
                    double discount2 = priceNights * 0.5;
                    discount = priceNights -discount2;
                }

            }
            if (room == "president apartment")
            {
                if (days < 10)
                {
                    double priceNights = nights * president;
                    double discount2 = priceNights * 0.9;
                    discount = priceNights - discount2;
                }
                else if (days >= 10 && days <= 15)
                {
                    double priceNights = nights * president;

                    double discount2 = priceNights * 0.85;
                    discount = priceNights - discount2;
                }
                else if (days > 15)
                {
                    double priceNights = nights * president;

                    double discount2 = priceNights * 0.2;
                    discount = priceNights - discount2;
                }

            }
            if (grade == "positive")
            {
                 all = discount + (discount * 0.25);
            }
            else if (grade == "negative")
            {
                 all = discount - (discount * 0.10);
            }
            Console.WriteLine("{0:F2}",all);
        }

    }
}