
    Write a function that identifies and activates the most significant inactive credit factor in a customer's credit profile binary flags, where each bit represents a specific credit behavior indicator. The function should locate the leftmost unset flag (0) in the customer's profile and set it to 1, effectively acknowledging a new positive credit factor in their assessment. The modified profile should maintain all previously set credit indicators while only updating the single most impactful available improvement opportunity.
    

    
def set_left_most_unset_bit(n):
    """
    Write a function that identifies and activates the most significant inactive credit factor in a customer's credit profile binary flags, where each bit represents a specific credit behavior indicator. The function should locate the leftmost unset flag (0) in the customer's profile and set it to 1, effectively acknowledging a new positive credit factor in their assessment. The modified profile should maintain all previously set credit indicators while only updating the single most impactful available improvement opportunity.
    

    """
def set_left_most_unset_bit(n):
    """
    Write a function that identifies and activates the most significant inactive credit factor in a customer's credit profile binary flags, where each bit represents a specific credit behavior indicator. The function should locate the leftmost unset flag (0) in the customer's profile and set it to 1, effectively acknowledging a new positive credit factor in their assessment. The modified profile should maintain all previously set credit indicators while only updating the single most impactful available improvement opportunity.
    

    """
    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