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 = 0;
            double bus = 0;
            double train = 0;

            switch (dayOrNight)
            {
                case "day":
                    if (n >= 20 && n <= 99)
                    {
                        Console.WriteLine(bus += 0.09 * n);
                    }
                    else if (n >= 100)
                    {
                        Console.WriteLine(train += 0.06 * n);
                    }
                    else
                    {
                        Console.WriteLine(taxi += 0.7 + 0.79 * n);
                    }
                    break;

                case "night":
                    if (n >= 20 && n <= 99)
                    {
                        Console.WriteLine(bus += 0.09 * n);
                    }
                    else if (n >= 100)
                    {
                        Console.WriteLine(train += 0.06 * n);
                    }
                    else
                    {
                        Console.WriteLine(taxi += 0.7 + 0.90 * n);
                    }
                    break;
            }
        }
    }
}