Family Trip

using System;

namespace FamilyTrip
{
    class Program
    {
        static void Main(string[] args)
        {
            double budget = double.Parse(Console.ReadLine());
            int overnight = int.Parse(Console.ReadLine());
            double overnightPrice = double.Parse(Console.ReadLine());
            double additionalCosts = double.Parse(Console.ReadLine());
            double totalPrice = 0;

            if (overnight > 7)
            {
                totalPrice = overnight*(overnightPrice * 0.95) + (additionalCosts * budget / 100);
            }
            else
            {
                totalPrice = overnight * overnightPrice + additionalCosts * budget / 100;
            }
            if (totalPrice <= budget)
            {
                Console.WriteLine($"Ivanovi will be left with {budget - totalPrice:F2} leva after vacation.");
            }
            else
            {
                Console.WriteLine($"{totalPrice - budget:F2} leva needed.");
            }
        }
    }
}