02.09.01.05.OneTaskNotEnough

using System;
using System.Collections.Generic;

class OneTaskNotEnough
{
    static void CalculatingLamps(List<int> lampCollection, int step)
    {
        int number = 0;
        if (lampCollection.Count == 1)
        {
            number = lampCollection[0];
            Console.WriteLine(number);

        }

        List<int> newCollection = new List<int>();
        if (lampCollection.Count > 1)
        {
            for (int i = 0; i < lampCollection.Count; i++)
            {
                if (i % step == 0)
                {
                    continue;
                }
                else
                {
                    newCollection.Add(lampCollection[i]);
                }

            }
            CalculatingLamps(newCollection, step + 1);
        }

    }


    static void CheckForBounding(string inputRoute)
    {
        int counterLs = 0;
        int counterRs = 0;
        foreach (char letter in inputRoute)
        {
            if (letter == 'L')
            {
                counterLs++;
            }
            if (letter == 'R')
            {
                counterRs++;
            }
        }

        if (counterLs == counterRs)
        {
            Console.WriteLine("unbounded");
        }
        else
        {
            Console.WriteLine("bounded");
        }
    }

    static void Main()
    {

        // first part
        int lamps = int.Parse(Console.ReadLine()); //12;
        //DateTime start = DateTime.Now;
        List<int> lampCollection = new List<int>();
        int counter = 2;
        for (int i = 2; i <= lamps; i = i + 2)
        {
            counter++;
            if (counter == 3)
            {
                counter = 0;
                continue;
            }
            lampCollection.Add(i);
        }
        int step = 4;
        CalculatingLamps(lampCollection, step);

        //TimeSpan duration = DateTime.Now - start;
        //Console.WriteLine("That took " + duration.TotalMilliseconds + " ms");

        // second part
        string inputRouteOne = Console.ReadLine().ToUpper();        // "L".ToUpper();
        CheckForBounding(inputRouteOne);
        string inputRouteTwo = Console.ReadLine().ToUpper();        //"SRSL".ToUpper();
        CheckForBounding(inputRouteTwo);


    }
}