05. Birthday party

using System;

namespace FirstStepsInCodding
{
    class Program
    {
        static void Main(string[] args)
        {
            //вход- наем - double - rent
            double rent = double.Parse(Console.ReadLine());

            //cake  – 20% от наема на залата -  -doble -> rent * 20/100;
            //drinks –  45 % по - малко от cake - double -> cake - cake*45/100
            //animator – 1 / 3 от наема на залата - double -> rent/3;
            double cake = rent * 20 / 100;
            double drinks = cake - cake * 45 / 100;
            double animator = rent / 3;

            //изход: sum от rent+cake+drinks+animator
            double sum = rent + cake + drinks + animator;
            Console.WriteLine(sum);
        }
    }
}