
    Design a function for an automated assessment system that identifies and marks as complete the first unmarked writing criterion in a student's assignment evaluation record. Given a binary status record where each position represents a writing criterion (1 for met, 0 for unmet), the function should update the status by changing the leftmost 0 to 1, effectively marking the next incomplete criterion as complete.
    

    
def set_left_most_unset_bit(n):
    """
    Design a function for an automated assessment system that identifies and marks as complete the first unmarked writing criterion in a student's assignment evaluation record. Given a binary status record where each position represents a writing criterion (1 for met, 0 for unmet), the function should update the status by changing the leftmost 0 to 1, effectively marking the next incomplete criterion as complete.
    

    """
def set_left_most_unset_bit(n):
    """
    Design a function for an automated assessment system that identifies and marks as complete the first unmarked writing criterion in a student's assignment evaluation record. Given a binary status record where each position represents a writing criterion (1 for met, 0 for unmet), the function should update the status by changing the leftmost 0 to 1, effectively marking the next incomplete criterion as complete.
    

    """
    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