2016_November_20M Vacation

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

namespace Vacation
{
    class Program
    {
        static void Main(string[] args)
        {
            var adultsCount = double.Parse(Console.ReadLine());
            var studenCount = double.Parse(Console.ReadLine());
            var nights = int.Parse(Console.ReadLine()) * 82.99;
            string transportType = (Console.ReadLine());

            switch (transportType)
            {

                case "train":
                    if (adultsCount + studenCount >= 50)
                    {
                        adultsCount = (adultsCount * 24.99) * 0.5;
                        studenCount = (studenCount * 14.99) * 0.5;
                    }
                    else
                    {
                        adultsCount = adultsCount * 24.99;
                        studenCount = studenCount * 14.99;
                    }
                    break;

                case "bus":
                    adultsCount = adultsCount * 32.50;
                    studenCount = studenCount * 28.50;
                    break;

                case "boat":
                    adultsCount = adultsCount * 42.99;
                    studenCount = studenCount * 39.99;
                    break;
                case "airplane":
                    adultsCount = adultsCount * 70.00;
                    studenCount = studenCount * 50.00;
                    break;
            }

            Console.WriteLine($"{0.1 * (2 * (adultsCount + studenCount) + nights) + (2 * (adultsCount + studenCount) + nights):f2}");


        }
    }
}