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

namespace LogicalOperators
{
    class Program
    {
        static void Main()
        {
            double n = double.Parse(Console.ReadLine());
            string dayornight = Console.ReadLine();

            if (dayornight == "day")
            {
                double taksi = 0.70 + (0.79 * n);
                double reis = 0.09 * n;
                double vlak = 0.06 * n;
                if (n < 20)
                {
                    Console.WriteLine("{0:F2}", taksi);
                } else if (n < 100)
                {
                    Console.WriteLine("{0:F2}", reis);
                } else
                {
                    Console.WriteLine("{0:F2}", vlak);
                }
            }


            if (dayornight == "night")
            {
                double taksi = 0.70 + (0.90 * n);
                double reis = 0.09 * n;
                double vlak = 0.06 * n;
                if (n < 20)
                {
                    Console.WriteLine("{0:F2}", taksi);
                }
                else if (n < 100)
                {
                    Console.WriteLine("{0:F2}", reis);
                }
                else
                {
                    Console.WriteLine("{0:F2}", vlak);
                }
            }
        }
    }
}