
    Write a function to analyze a student's writing sample and find the section with the greatest imbalance between complete sentences and sentence fragments, where the imbalance is calculated as the absolute difference between the number of complete sentences and fragments in any continuous portion of the text. The input is a sequence where '1' represents a complete sentence and '0' represents a sentence fragment.
    

    
def find_length(string):
    """
    Write a function to analyze a student's writing sample and find the section with the greatest imbalance between complete sentences and sentence fragments, where the imbalance is calculated as the absolute difference between the number of complete sentences and fragments in any continuous portion of the text. The input is a sequence where '1' represents a complete sentence and '0' represents a sentence fragment.
    

    """
def find_length(string):
    """
    Write a function to analyze a student's writing sample and find the section with the greatest imbalance between complete sentences and sentence fragments, where the imbalance is calculated as the absolute difference between the number of complete sentences and fragments in any continuous portion of the text. The input is a sequence where '1' represents a complete sentence and '0' represents a sentence fragment.
    

    """
    n = len(string)
    current_sum = 0
    max_sum = 0
    for i in range(n):
        current_sum += 1 if string[i] == '0' else -1
        if current_sum < 0:
            current_sum = 0
        max_sum = max(current_sum, max_sum)
    return max_sum if max_sum else 0