Transport_Price

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

namespace test
{
    class Program
    {
        static void Main(string[] args)
        {

            int km = int.Parse(Console.ReadLine());
            string dayNight = Console.ReadLine();
            decimal bestPrice = 0;
            decimal priceTaxi=decimal.MaxValue;
            decimal priceBus=decimal.MaxValue;
            decimal priceTrain=decimal.MaxValue;
            if (dayNight=="day")
            {
                priceTaxi = (decimal)(0.70 + 0.79 * km);

            }
            else if (dayNight=="night")
            {
                priceTaxi= (decimal)(0.70 + 0.90 * km);
            }
            if (km >= 20)
            {
                priceBus = (decimal)(0.09 * km);
            }
            if (km >= 100)
            {
                priceTrain = (decimal)(0.06 * km);
            }

            bestPrice = Math.Min(Math.Min(priceTaxi, priceBus),priceTrain);
            Console.WriteLine(bestPrice);
        }
    }
}