using System;

namespace nestedConstructions
{
    class Program
    {
        static void Main(string[] args)
        {
            int days = int.Parse(Console.ReadLine());
            string typeRoom = Console.ReadLine();
            string feedback = Console.ReadLine();



            double total = 0;


            if (typeRoom == "room for one person")
            {
                total = days * 18;


            }
            else if (typeRoom == "apartment")
            {
                total = days * 25;
                if (days < 10)
                {

                    total -= total * 0.30;
                }
                else if (days >= 10 && days <= 15)
                {
                    total -= total * 0.35;

                }
                else if (days > 15)
                {
                    total -= total * 0.50;
                }

            }
            else if (typeRoom == "president apartment")
            {
                total = days * 35;
                if (days < 10)
                {
                    total -= total * 0.10;
                }
                else if (days >= 10 && days <= 15)
                {
                    total -= total * 0.15;

                }
                else if (days > 15)
                {
                    total -= total * 0.20;
                }
            }

            if (feedback == "positive")
            {
                total += total * 0.25;
            }
            else if (feedback == "negative")
            {
                total -= total * 0.10;
            }



            Console.WriteLine("{0:f2}", total);



        }
    }
}