vector<int> swapBitGroups(vector<int> arr, int digit1, int digit2, int size)
{
    vector<int> arr2(arr);
    int temp;
    for (int i = 0; i < size; i++)
    {
        temp = arr2[digit1 - i];
        arr2[digit1 - i] = arr2[digit2 - i];
        arr2[digit2 - i] = temp;
    }
    return arr2;
}