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

namespace seg
{
    class Program
    {
        static void Main(string[] args)
        {
            var days = int.Parse(Console.ReadLine());
            string Kindroom = Console.ReadLine();
            string rating = Console.ReadLine();
            double price = 0;
            if (days <= 10)
            {
                if (Kindroom == "room for one person")
                {
                    price = 18 * (days - 1);
                }
                else if (Kindroom == "apartment")
                {
                    price = (days - 1) * 25 * 0.70;
                }
                else if (Kindroom == "president apartment")
                {
                    price = (days - 1) * 35 * 0.90;
                }
            }
            else if (days >= 11 && days <= 15)
            {
                if (Kindroom == "room for one person")
                {
                    price = (days - 1) * 18;
                }
                else if (Kindroom == "apartment")
                {
                    price = (days - 1) * 25 * 0.65;

                }
                else if (Kindroom == "president apartment")
                {
                    price = (days - 1) * 35 * 0.85;
                }
            }
            else if (days > 15)
            {
                if (Kindroom == "room for one person")
                {
                    price = (days - 1) * 18;
                }
                else if (Kindroom == "apartment")
                {
                    price = (days - 1) * 25 * 0.50;
                }
                else if (Kindroom == "president apartment")
                {
                    price = (days - 1) * 35 * 0.80;
                }
            }

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