Number Generator

            int M = int.Parse(Console.ReadLine());
            int N = int.Parse(Console.ReadLine());
            int L = int.Parse(Console.ReadLine());
            int special = int.Parse(Console.ReadLine());
            int control = int.Parse(Console.ReadLine());

            for (int i = M; i >= 1; i--)
            {
                for (int j = N; j >= 1; j--)
                {
                    for (int k = L; k >= 1; k--)
                    {
                        int num = int.Parse($"{i}{j}{k}");

                        if (num % 3 == 0) special += 5;
                        else if (num % 10 == 5) special -= 2;
                        else if (num % 2 == 0) special *= 2;

                        if (special >= control)
                        {
                            Console.WriteLine($"Yes! Control number was reached! Current special number is {special}.");
                            return;
                        }
                    }
                }
            }

            Console.WriteLine($"No! {special} is the last reached special number.");