
    Given a student's learning progress represented as a binary number where 1 indicates mastered skills and 0 indicates unmastered skills, create a function that identifies and activates the leftmost unmastered skill (converting the leftmost 0 to 1). This operation helps determine the next most significant learning objective in the student's educational pathway based on their current mastery pattern.
    

    
def set_left_most_unset_bit(n):
    """
    Given a student's learning progress represented as a binary number where 1 indicates mastered skills and 0 indicates unmastered skills, create a function that identifies and activates the leftmost unmastered skill (converting the leftmost 0 to 1). This operation helps determine the next most significant learning objective in the student's educational pathway based on their current mastery pattern.
    

    """
def set_left_most_unset_bit(n):
    """
    Given a student's learning progress represented as a binary number where 1 indicates mastered skills and 0 indicates unmastered skills, create a function that identifies and activates the leftmost unmastered skill (converting the leftmost 0 to 1). This operation helps determine the next most significant learning objective in the student's educational pathway based on their current mastery pattern.
    

    """
    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