Exam 4. Catch The Bits

namespace _5.CatchTheBits
{
    using System;

    public class CatchTheBits
    {
        public static void Main(string[] args)
        {
            checked
            {
                int count = int.Parse(Console.ReadLine());
                int step = int.Parse(Console.ReadLine());

                int bitCounter = 0;
                int positionInSequence = 0;
                int bitSequence = 0;
                for (int i = 0; i < count; i++)
                {
                    byte numBytes = byte.Parse(Console.ReadLine());
                    for (int currentBit = 7; currentBit >= 0; currentBit--)
                    {
                        if ((step == 1 && positionInSequence > 0) || (positionInSequence % step) == 1)
                        {
                            int bitMask = 1 << currentBit;
                            int bitValue = (numBytes & bitMask) >> currentBit;
                            bitSequence <<= 1;
                            bitSequence |= (byte)bitValue;
                            bitCounter++;
                            if (bitCounter == 8)
                            {
                                Console.WriteLine(bitSequence);
                                bitSequence = 0;
                                bitCounter = 0;
                            }
                        }

                        positionInSequence++;
                    }
                }

                if (bitCounter > 0)
                {
                    bitSequence <<= 8 - bitCounter;
                    Console.WriteLine(bitSequence);
                }
            }
        }
    }
}