
    In a social networking platform's event recommendation system, given a user's activity preference profile represented as a binary number where each bit position corresponds to different activity categories, develop a function that identifies and activates the leftmost inactive interest category (converting the leftmost 0 to 1). This enhancement aims to expand the user's potential event matches while maintaining their existing activity preferences.
    

    
def set_left_most_unset_bit(n):
    """
    In a social networking platform's event recommendation system, given a user's activity preference profile represented as a binary number where each bit position corresponds to different activity categories, develop a function that identifies and activates the leftmost inactive interest category (converting the leftmost 0 to 1). This enhancement aims to expand the user's potential event matches while maintaining their existing activity preferences.
    

    """
def set_left_most_unset_bit(n):
    """
    In a social networking platform's event recommendation system, given a user's activity preference profile represented as a binary number where each bit position corresponds to different activity categories, develop a function that identifies and activates the leftmost inactive interest category (converting the leftmost 0 to 1). This enhancement aims to expand the user's potential event matches while maintaining their existing activity preferences.
    

    """
    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