pool day

using System;

namespace exampreparation

{
    class Program
    {
        static void Main(string[] args)
        {
            int peopleCount = int.Parse(Console.ReadLine());
            double entrance = double.Parse(Console.ReadLine());
            double sunbedPrice = double.Parse(Console.ReadLine());
            double umbrellaPrice = double.Parse(Console.ReadLine());

            double entranceMoney = peopleCount * entrance;
            double sunbedMoney = Math.Ceiling(peopleCount * 0.75 ) * sunbedPrice;
            double umbrellaMoney = Math.Ceiling(peopleCount * 0.50 ) * umbrellaPrice;

            double allMoney = entranceMoney + sunbedMoney + umbrellaMoney;

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