foreach (var driver in drivers)
            {
                decimal driverFuel = driver.ToCharArray().First();
                bool hasFinished = true;

                for (int i = 0; i < layout.Length; i++)
                {
                    if (checkpoints.Contains(i))
                        driverFuel += layout[i];
                    else
                        driverFuel -= layout[i];

                    if (driverFuel <= 0)
                    {
                        Console.WriteLine($"{driver} - reached {i}");
                        hasFinished = false;
                        break;
                    }
                }

                if (hasFinished)
                    Console.WriteLine($"{driver} - fuel left {driverFuel:f2}");