FixedCode

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

namespace _01.TransportPrice
{
    class Program
    {
        static void Main(string[] args)
        {
            int kilometers = int.Parse(Console.ReadLine());
            string dayOrNight = Console.ReadLine();
            double result = 0;

            if (dayOrNight == "day")
            {
                //таксито е за 19 км и по-малко
                if (kilometers < 20)
                {
                    result = 0.70 + kilometers * 0.79;
                }
                else if (kilometers >= 20 && kilometers < 100)
                {
                    result = kilometers * 0.09;
                }
                //100 км включително трябва да е
                else if (kilometers >= 100)
                {
                    result = kilometers * 0.06;
                }
            }

            else if (dayOrNight == "night")
            {
                if (kilometers < 20)
                {
                    result = 0.70 + kilometers * 0.90;
                }
                else if (kilometers >= 20 && kilometers < 100)
                {
                    result = kilometers * 0.09;
                }
                else if (kilometers >= 100)
                {
                    result = kilometers * 0.06;
                }
            }
            Console.WriteLine(Math.Round(result, 2));


        }
    }
}