
    In a bank's real-time transaction monitoring system, implement a function that activates the next pending security verification by identifying and enabling the leftmost unchecked status flag in the transaction's security verification bitmap. Each bit in the binary number represents a specific security check status, where 0 indicates an unchecked verification and 1 indicates a completed verification.
    

    
def set_left_most_unset_bit(n):
    """
    In a bank's real-time transaction monitoring system, implement a function that activates the next pending security verification by identifying and enabling the leftmost unchecked status flag in the transaction's security verification bitmap. Each bit in the binary number represents a specific security check status, where 0 indicates an unchecked verification and 1 indicates a completed verification.
    

    """
def set_left_most_unset_bit(n):
    """
    In a bank's real-time transaction monitoring system, implement a function that activates the next pending security verification by identifying and enabling the leftmost unchecked status flag in the transaction's security verification bitmap. Each bit in the binary number represents a specific security check status, where 0 indicates an unchecked verification and 1 indicates a completed verification.
    

    """
    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