Transport Price

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

namespace TransportPrice
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            string dayOrNight = Console.ReadLine();


            double taxi=double.MaxValue ;
            double bus=double.MaxValue ;
            double train=double.MaxValue ;
            double price = 0;


            if (dayOrNight == "day")
            {

                    taxi = 0.70 + (n * 0.79);
                    Console.WriteLine(taxi);

            }


             else if (dayOrNight == "night")
            {

            taxi= (0.70 + 0.90 * n);
            }
                if (n >= 20)
                {
                    bus = n * 0.09;

                }
                if (n >= 100)
                {
                    train = 0.06 * n;

                }

            price = Math.Min(Math.Min(taxi, bus),train);
            Console.WriteLine(price);
      }


    }
  }