Transport Price

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

namespace TransportCena
{
    class Program
    {
        static void Main(string[] args)
        {
            double nKilometri = int.Parse(Console.ReadLine());
            string daynight = Console.ReadLine();

            double taxiSumaday = 0.70 + nKilometri * 0.79;
            double taxiSumanight = 0.70 + nKilometri * 0.90;
            double avtobus = 0.09 * nKilometri;
            double vlak = 0.06 * nKilometri;

            //Kogato km sa pod 20 transporta moje da bude samo taxi;
            if (nKilometri < 20)
            {
                if (daynight == "day")
                {
                    Console.WriteLine($"{taxiSumaday:f2}");
                }
                else if (daynight == "night")
                {
                    Console.WriteLine($"{taxiSumanight:f2}");
                }
            }

            //Kogato km sa nad 20 transporta shte e taxi ili avtobus;
            if (nKilometri < 100 && nKilometri > 20)
            {
                if (daynight == "day")
                {
                    if (avtobus < taxiSumaday)
                    {
                        Console.WriteLine($"{avtobus:f2}");
                    }
                    else
                    {
                        Console.WriteLine($"{taxiSumaday:f2}");
                    }

                }
                else if (daynight == "night")
                {
                    if (avtobus < taxiSumaday)
                    {
                        Console.WriteLine($"{avtobus:f2}");
                    }
                    else
                    {
                        Console.WriteLine($"{taxiSumaday:f2}");
                    }
                }

            }

            //Kogato km sa nad 100 transportut moje da e i ot trite tipa;
            if (nKilometri > 100 )
            {
                if (daynight == "day")
                {
                    if (vlak < taxiSumaday && vlak < avtobus)
                    {
                        Console.WriteLine($"{vlak:f2}");
                    }
                    else if (avtobus < taxiSumaday && avtobus < vlak)
                    {
                        Console.WriteLine($"{avtobus:f2}");
                    }
                    else
                    {
                        Console.WriteLine($"{taxiSumaday:f2}");
                    }

                }
                else if (daynight == "night")
                {
                    if (vlak < taxiSumaday && vlak < avtobus)
                    {
                        Console.WriteLine($"{vlak:f2}");
                    }
                    else if (avtobus < taxiSumaday && avtobus < vlak)
                    {
                        Console.WriteLine($"{avtobus:f2}");
                    }
                    else
                    {
                        Console.WriteLine($"{taxiSumaday:f2}");
                    }
                }
            }
        }
    }
}