Light The Torches

using System;
using System.Collections.Generic;
using System.Linq;

class LightTheTorches
{
    public static List<int> torchedRooms = new List<int>();
    public static int nextReturnPosition = 0;

    static void Main()
    {
        int roomNumber = int.Parse(Console.ReadLine());
        string roomsInfo = Console.ReadLine();
        Rooms(roomNumber, roomsInfo);
        string command = Console.ReadLine();
        while (command != "END")
        {
            string[] monitoring = command.Split(' ');
            MonitoringMovement(monitoring, nextReturnPosition);
            command = Console.ReadLine();
        }
       Console.WriteLine(torchedRooms.Sum() * Convert.ToInt32('D'));
    }

    private static void Rooms(int num, string lightDark)
    {
        int updateRooms = 0;
        for (int i = 0; i < num; i++)
        {
            if (updateRooms > lightDark.Length - 1)
            {
                updateRooms = 0;
            }
            torchedRooms.Add(lightDark[updateRooms] == 'L' ? 0 : 1);
            updateRooms++;
        }
        nextReturnPosition = num / 2;
    }

    private static void MonitoringMovement(string[] arr, int startIndex)
    {
        int roomsToMonitor = Convert.ToInt32(arr[1]);
        if (arr[0] == "LEFT")
        {
            roomsToMonitor = startIndex - roomsToMonitor - 1;
            if (roomsToMonitor < 0)
            {
                roomsToMonitor = 0;
            }
            if (roomsToMonitor != startIndex)
            {
                torchedRooms[roomsToMonitor] = torchedRooms[roomsToMonitor] == 0 ? 1 : 0;
            }
        }

        if (arr[0] == "RIGHT")
        {
            roomsToMonitor = startIndex + roomsToMonitor + 1;
            if (roomsToMonitor >= torchedRooms.Count)
            {
                roomsToMonitor = torchedRooms.Count - 1;
            }
            if (roomsToMonitor != startIndex)
            {
                torchedRooms[roomsToMonitor] = torchedRooms[roomsToMonitor] == 0 ? 1 : 0;
            }
        }
        nextReturnPosition = roomsToMonitor;
    }
}