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

namespace SkiTrip
{
    class SkiTrip
    {
        static void Main(string[] args)
        {
            double days = double.Parse(Console.ReadLine());
            string room = Console.ReadLine();
            string grade = Console.ReadLine();
            double discount = 0;
            double price = 0;
            double wholeprice = 0;

            if (room == "room for one person")
            {
                if (days < 10)
                {
                    discount = 0;
                    price = 18.00 * days;
                }

                else if (days >= 10 && days <= 15)
                {
                    discount = 0;
                    price = 18.00 * days;
                }

                else if (days > 15)
                {
                    discount = 0;
                    price = 18.00 * days;
                }

                else if (room == "apartament")
                {
                    if (days < 10)
                    {
                        discount = 0.3 * price;
                        price = 25.00 * days;
                    }
                    else if (days >= 10 && days <= 15)
                    {
                        discount = 0.35 * price;
                        price = 25.00 * days;
                    }
                    else if (days > 15)
                    {
                        discount = 0.5 * price;
                        price = 25.00 * days;
                    }
                }
                else if (room == "president apartament")
                {
                    if (days < 10)
                    {
                        discount = 0.1 * price;
                        price = 35.00 * days;
                    }
                    else if (days >= 10 && days <= 15)
                    {
                        discount = 0.15 * price;
                        price = 35.00 * days;
                    }
                    else if (days > 15)
                    {
                        discount = 0.2 * price;
                        price = 35.00 * days;
                    }
                }
                if (grade == "positive")wholeprice = price + (0.25 * price);
                else if (grade == "negative") wholeprice = price - 0.1 * price;
                Console.WriteLine("{0:F2}", wholeprice);
            }
        }
    }
}