
    In a content moderation system where each bit in a binary number represents a specific content flag (1 for reviewed, 0 for pending review), implement a function that identifies and sets the leftmost pending review flag to reviewed status. The function should take a binary number representing the current moderation status and return the updated status with the leftmost unset bit (0) changed to set (1), helping moderators track which content categories still need review.
    

    
def set_left_most_unset_bit(n):
    """
    In a content moderation system where each bit in a binary number represents a specific content flag (1 for reviewed, 0 for pending review), implement a function that identifies and sets the leftmost pending review flag to reviewed status. The function should take a binary number representing the current moderation status and return the updated status with the leftmost unset bit (0) changed to set (1), helping moderators track which content categories still need review.
    

    """
def set_left_most_unset_bit(n):
    """
    In a content moderation system where each bit in a binary number represents a specific content flag (1 for reviewed, 0 for pending review), implement a function that identifies and sets the leftmost pending review flag to reviewed status. The function should take a binary number representing the current moderation status and return the updated status with the leftmost unset bit (0) changed to set (1), helping moderators track which content categories still need review.
    

    """
    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