gistfile1.cs

using System;
using System.Text;

class Program
{
    static void Main(string[] args)
    {
        int roomSize = int.Parse(Console.ReadLine());
        string roomFilter = Console.ReadLine();

        StringBuilder room = new StringBuilder();

        for (int i = 0; i < roomSize; i++)
        {
            room.Append(roomFilter[i % roomFilter.Length]);
        }

        string currentCommand = Console.ReadLine();

        int currentPriestPosition = roomSize / 2;
        int darkRoomsCount = 0;

        while (currentCommand != "END")
        {
            int lastPriestPosition = currentPriestPosition;

            switch (currentCommand.Split(' ')[0])
            {
                case "LEFT":
                    int stepLeft = int.Parse(currentCommand.Split(' ')[1]);

                    for (int i = 1; i <= stepLeft + 1; i++)
                    {
                        if (lastPriestPosition - 1 >= 0)
                        {
                            lastPriestPosition--;
                        }
                        else
                        {
                            break;
                        }
                    }

                    if (currentPriestPosition != lastPriestPosition)
                    {
                        currentPriestPosition = lastPriestPosition;
                        ChangeRoomState(currentPriestPosition, ref room);
                    }

                    break;

                case "RIGHT":
                    int stepRight = int.Parse(currentCommand.Split(' ')[1]);

                    for (int i = 1; i <= stepRight + 1; i++)
                    {
                        if (lastPriestPosition + 1 < roomSize)
                        {
                            lastPriestPosition++;
                        }
                        else
                        {
                            break;
                        }
                    }

                    if (currentPriestPosition != lastPriestPosition)
                    {
                        currentPriestPosition = lastPriestPosition;
                        ChangeRoomState(currentPriestPosition, ref room);
                    }

                    break;

                default:
                    break;
            }

            currentCommand = Console.ReadLine();
        }

        for (int i = 0; i < room.Length; i++)
        {
            if (room[i] == 'D')
            {
                darkRoomsCount++;
            }
        }

        Console.WriteLine(darkRoomsCount * 68);
    }

    private static void ChangeRoomState(int currentPriestPosition, ref StringBuilder room)
    {
        if (room[currentPriestPosition] == 'L')
        {
            room[currentPriestPosition] = 'D';
        }
        else
        {
            room[currentPriestPosition] = 'L';
        }
    }
}