using System;

public class Program

{

    public static int[] m_data = new int[8];

    public static int IdToIndex(int bitIndex)

    {

        int bitPosition = 1 << (bitIndex & 0x1F);

        return bitPosition;

    }

    public static void SetFlag(int bitIndex, bool sw)

    {

        if (bitIndex >= 256)

            return;

        if (bitIndex < 0)

            return;

​

        int indexInInteger = IdToIndex(bitIndex);

        int chunkForBit = m_data[bitIndex >> 5];

        int newValue = 0;

        if (sw)

        {

            newValue = indexInInteger | chunkForBit;

        }

        else

        {

            newValue = ~indexInInteger & chunkForBit;

        }

        m_data[bitIndex >> 5] = newValue;

    }

​

    public static void Main()

    {

        Console.WriteLine("Hello World");

        int index = IdToIndex(160);

        Console.WriteLine($"index {index}");

        SetFlag(index, true);

        foreach(var d in m_data){

            Console.Write(d);

        }

        Console.WriteLine($"\n");

    }

}