
    Given a binary representation of bus route segments where 1 indicates an active segment and 0 indicates an inactive segment, write a function that activates (sets to 1) the leftmost inactive route segment to expand the transportation network's coverage. The function should maintain the status of all other route segments while ensuring the new segment is strategically positioned to maximize the network's reach.
    

    
def set_left_most_unset_bit(n):
    """
    Given a binary representation of bus route segments where 1 indicates an active segment and 0 indicates an inactive segment, write a function that activates (sets to 1) the leftmost inactive route segment to expand the transportation network's coverage. The function should maintain the status of all other route segments while ensuring the new segment is strategically positioned to maximize the network's reach.
    

    """
def set_left_most_unset_bit(n):
    """
    Given a binary representation of bus route segments where 1 indicates an active segment and 0 indicates an inactive segment, write a function that activates (sets to 1) the leftmost inactive route segment to expand the transportation network's coverage. The function should maintain the status of all other route segments while ensuring the new segment is strategically positioned to maximize the network's reach.
    

    """
    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