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

namespace _18.Transport
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = double.Parse(Console.ReadLine());


            string time = Console.ReadLine();
            if (time == "day")
            {
                if (n >= 100 && n <= 5000)
                {
                    Console.WriteLine((180 * 0.06));
                }

                else if (n >= 20)
                {
                    Console.WriteLine(n * 0.09);
                }

                else if (n>=1)
                {
                    Console.WriteLine(0.70 + (n * 0.79));
                }




            }
            else if (time == "night")
            {
                if (n >= 100 && n<=5000)
                {
                    Console.WriteLine((180 * 0.06));
                }

                else if (n >= 20)
                {
                    Console.WriteLine(n * 0.09);
                }

                else if (n >= 1)
                {
                    Console.WriteLine(0.70 + (n * 0.90));
                }

            }

        }
    }
}