using System;
using System.Dynamic;
using System.Globalization;

namespace SoftUniExercises
{
    class Program
    {
        static void Main(string[] args)
        {
            int days = int.Parse(Console.ReadLine()) - 1;
            string type = Console.ReadLine();
            string grade = Console.ReadLine();
            double cost;
            double discount;
            double addOrSub;
            switch (type)
            {
                case "room for one person":
                        cost = days * 18.00;
                    if (grade == "positive")
                    {
                        addOrSub = cost * 0.25;
                        Console.WriteLine("{0:F2}", cost + addOrSub);
                    }
                    else
                    {
                        addOrSub = cost * 0.1;
                        Console.WriteLine("{0:F2}", cost - addOrSub);
                    }
                    break;
                case "apartment":
                    cost = days * 25.00;
                    if (days < 10)
                    {
                        discount = cost * 0.30;
                        cost -= discount;
                        if (grade == "positive")
                        {
                            addOrSub = cost * 0.25;
                            Console.WriteLine("{0:F2}", cost + addOrSub);
                        }
                        else
                        {
                            addOrSub = cost * 0.1;
                            Console.WriteLine("{0:F2}", cost - addOrSub);
                        }
                    }
                    else if (days >= 10 && days <= 15)
                    {
                        discount = cost * 0.35;
                        cost -= discount;
                        if (grade == "positive")
                        {
                            addOrSub = cost * 0.25;
                            Console.WriteLine("{0:F2}", cost + addOrSub);
                        }
                        else
                        {
                            addOrSub = cost * 0.1;
                            Console.WriteLine("{0:F2}", cost - addOrSub);
                        }
                    }
                    else
                    {
                        discount = cost * 0.50;
                        cost -= discount;
                        if (grade == "positive")
                        {
                            addOrSub = cost * 0.25;
                            Console.WriteLine("{0:F2}", cost + addOrSub);
                        }
                        else
                        {
                            addOrSub = cost * 0.1;
                            Console.WriteLine("{0:F2}", cost - addOrSub);
                        }
                    }
                    break;
                case "president apartment":
                    cost = days * 35.00;
                    if (days < 10)
                    {
                        discount = cost * 0.10;
                        cost -= discount;
                        if (grade == "positive")
                        {
                            addOrSub = cost * 0.25;
                            Console.WriteLine("{0:F2}", cost + addOrSub);
                        }
                        else
                        {
                            addOrSub = cost * 0.1;
                            Console.WriteLine("{0:F2}", cost - addOrSub);
                        }
                    }
                    else if (days >= 10 && days <= 15)
                    {
                        discount = cost * 0.15;
                        cost -= discount;
                        if (grade == "positive")
                        {
                            addOrSub = cost * 0.25;
                            Console.WriteLine("{0:F2}", cost + addOrSub);
                        }
                        else
                        {
                            addOrSub = cost * 0.1;
                            Console.WriteLine("{0:F2}", cost - addOrSub);
                        }
                    }
                    else
                    {
                        discount = cost * 0.20;
                        cost -= discount;
                        if (grade == "positive")
                        {
                            addOrSub = cost * 0.25;
                            Console.WriteLine("{0:F2}", cost + addOrSub);
                        }
                        else
                        {
                            addOrSub = cost * 0.1;
                            Console.WriteLine("{0:F2}", cost - addOrSub);
                        }
                    }
                    break;
            }
        }
    }
}