01.PoolDay

using System;

namespace _01.PoolDay
{
    class Program
    {
        static void Main(string[] args)
        {
            int people = int.Parse(Console.ReadLine());
            double entryTax = double.Parse(Console.ReadLine());
            double bedTax = double.Parse(Console.ReadLine());
            double umbrellaTax = double.Parse(Console.ReadLine());

            double totalTax = people * entryTax;
            double totalBedTax = (Math.Ceiling(people * 0.75)) * bedTax;
            double totalUmbrellaTax = (Math.Ceiling(people * 0.50)) * umbrellaTax;

            double endPrice = totalTax + totalBedTax + totalUmbrellaTax;

            Console.WriteLine($"{endPrice:f2} lv.");
        }
    }
}