using System;

namespace SkiTrip
{
internal class Program
{
    static void Main(string[] args)
    {
        int stayDays = int.Parse(Console.ReadLine());
        string placeType = Console.ReadLine();
        string rating = Console.ReadLine();

        double pricePerNight = 0.00;
        stayDays = stayDays - 1; // Minus one (1) because it's per night

        // The price discount for each room type
        if (placeType == "room for one person")
        {
            pricePerNight = stayDays * 18.00;

        }
        else if (placeType == "apartment")
        {
            pricePerNight = stayDays * 25.00;

            if (stayDays > 15)
            {
                pricePerNight -= pricePerNight * 0.50;
            }
            else if (stayDays >= 10 && stayDays <= 15)
            {
                pricePerNight -= pricePerNight * 0.35;
            }
            else if (stayDays < 10)
            {
                pricePerNight -= pricePerNight * 0.30;
            }
        }
        else if (placeType == "president apartment")
        {
            pricePerNight = stayDays * 35.00;

            if (stayDays > 15)
            {
                pricePerNight -= pricePerNight * 0.20;
            }
            else if (stayDays >= 10 && stayDays <= 15)
            {
                pricePerNight -= pricePerNight * 0.15;
            }
            else if (stayDays < 10)
            {
                pricePerNight -= pricePerNight * 0.10;
            }
        }

        // The rise and fall depends by the user's rating
        if (rating == "positive")
        {
            pricePerNight += pricePerNight * 0.25;
        }
        else if (rating == "negative")
        {
            pricePerNight -= pricePerNight * 0.10;
        }

        Console.WriteLine($"{pricePerNight:F2}");
    }
}
}