
    Write a function that enhances a transaction's fraud detection pattern by activating the first inactive security rule, represented by the leftmost unset bit in the binary pattern, where each bit corresponds to a specific fraud detection measure. The function should take a binary number representing the current active fraud detection rules and return a new binary number with the leftmost unset bit now activated, strengthening the overall fraud monitoring system.
    

    
def set_left_most_unset_bit(n):
    """
    Write a function that enhances a transaction's fraud detection pattern by activating the first inactive security rule, represented by the leftmost unset bit in the binary pattern, where each bit corresponds to a specific fraud detection measure. The function should take a binary number representing the current active fraud detection rules and return a new binary number with the leftmost unset bit now activated, strengthening the overall fraud monitoring system.
    

    """
def set_left_most_unset_bit(n):
    """
    Write a function that enhances a transaction's fraud detection pattern by activating the first inactive security rule, represented by the leftmost unset bit in the binary pattern, where each bit corresponds to a specific fraud detection measure. The function should take a binary number representing the current active fraud detection rules and return a new binary number with the leftmost unset bit now activated, strengthening the overall fraud monitoring system.
    

    """
    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