tourist shop

using System;

namespace exampreparation
{
    class exam
    {
        static void Main(string[] args)
        {
            double budget = double.Parse(Console.ReadLine());
            string command = Console.ReadLine();
            int count = 0;
            double productSum = 0.0;

            while (command != "Stop")
            {
                double price = double.Parse(Console.ReadLine());

                count++;

                if (count % 3 == 0)
                {
                    price *= 0.50;
                }

                if (price > budget)
                {
                    Console.WriteLine("You don't have enough money!");
                    Console.WriteLine($"You need {price - budget:f2} leva!");
                    break;
                }

                budget -= price;
                productSum += price;

                command = Console.ReadLine();
            }

            if (command == "Stop")
            {
                Console.WriteLine($"You bought {count} products for {productSum:f2} leva.");
            }
        }
    }
}