
    Given a binary representation of parking space occupancy where 1 indicates an occupied spot and 0 indicates a vacant spot, write a function that identifies and marks the leftmost vacant parking space as occupied (converting the leftmost 0 to 1) to update the dynamic pricing system. If all parking spaces are occupied (all bits are 1), the function should return the original occupancy status unchanged.
    

    
def set_left_most_unset_bit(n):
    """
    Given a binary representation of parking space occupancy where 1 indicates an occupied spot and 0 indicates a vacant spot, write a function that identifies and marks the leftmost vacant parking space as occupied (converting the leftmost 0 to 1) to update the dynamic pricing system. If all parking spaces are occupied (all bits are 1), the function should return the original occupancy status unchanged.
    

    """
def set_left_most_unset_bit(n):
    """
    Given a binary representation of parking space occupancy where 1 indicates an occupied spot and 0 indicates a vacant spot, write a function that identifies and marks the leftmost vacant parking space as occupied (converting the leftmost 0 to 1) to update the dynamic pricing system. If all parking spaces are occupied (all bits are 1), the function should return the original occupancy status unchanged.
    

    """
    if not n & n + 1:
        return n
    (pos, temp, count) = (0, n, 0)
    while temp:
        if not temp & 1:
            pos = count
        count += 1
        temp >>= 1
    return n | 1 << pos