Transport price

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

namespace ConsoleApp10
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            string dayTime = Console.ReadLine();
            double taxiBegin = 0.70;
            double taxiDay = 0.79;
            double taxiNight = 0.90;
            double bus = 0.09;
            double train = 0.06;

            if (n < 20 && dayTime == "day")
            {
                Console.WriteLine($"{taxiBegin + (taxiDay * n):f2}");
            }
            else if (n < 20 && dayTime == "night")
            {
                Console.WriteLine($"{taxiBegin + (taxiNight * n):f2}");
            }
            else if (n >= 20 && n < 100)
            {
                Console.WriteLine($"{n * bus:f2}");
            }
            else if (n >= 100)
            {
                Console.WriteLine($"{n * train:f2}");
            }
        }
    }
}