
    In a bank's fraud detection system, given a binary pattern 'n' representing various security checks where 1 indicates triggered alerts and 0 indicates inactive monitoring, implement a function that activates the leftmost inactive security check (converts leftmost 0 to 1). The activation of the leftmost dormant security measure ensures the most significant unmonitored aspect of transaction patterns is brought under surveillance, enhancing the bank's fraud detection capabilities.
    

    
def set_left_most_unset_bit(n):
    """
    In a bank's fraud detection system, given a binary pattern 'n' representing various security checks where 1 indicates triggered alerts and 0 indicates inactive monitoring, implement a function that activates the leftmost inactive security check (converts leftmost 0 to 1). The activation of the leftmost dormant security measure ensures the most significant unmonitored aspect of transaction patterns is brought under surveillance, enhancing the bank's fraud detection capabilities.
    

    """
def set_left_most_unset_bit(n):
    """
    In a bank's fraud detection system, given a binary pattern 'n' representing various security checks where 1 indicates triggered alerts and 0 indicates inactive monitoring, implement a function that activates the leftmost inactive security check (converts leftmost 0 to 1). The activation of the leftmost dormant security measure ensures the most significant unmonitored aspect of transaction patterns is brought under surveillance, enhancing the bank's fraud detection capabilities.
    

    """
    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