
    Given a binary risk assessment profile where each bit represents a specific credit risk factor, develop a function that identifies and flags the leftmost unassessed risk criterion (leftmost 0 bit) by setting it to 1. The resulting binary number should reflect an updated risk assessment profile where the most significant previously unchecked risk factor has been evaluated, while maintaining all other existing risk evaluations.
    

    
def set_left_most_unset_bit(n):
    """
    Given a binary risk assessment profile where each bit represents a specific credit risk factor, develop a function that identifies and flags the leftmost unassessed risk criterion (leftmost 0 bit) by setting it to 1. The resulting binary number should reflect an updated risk assessment profile where the most significant previously unchecked risk factor has been evaluated, while maintaining all other existing risk evaluations.
    

    """
def set_left_most_unset_bit(n):
    """
    Given a binary risk assessment profile where each bit represents a specific credit risk factor, develop a function that identifies and flags the leftmost unassessed risk criterion (leftmost 0 bit) by setting it to 1. The resulting binary number should reflect an updated risk assessment profile where the most significant previously unchecked risk factor has been evaluated, while maintaining all other existing risk evaluations.
    

    """
    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