(student_scores)
:param student_scores: list of integer student scores.
    :return: integer count of student scores at or below 40.
:param student_scores: list of integer student scores.
    :return: integer count of student scores at or below 40.
: param student_scores : list of integer student scores . : return : integer count of student scores at or below 40 .
def count_failed_students(student_scores):
    """
    :param student_scores: list of integer student scores.
    :return: integer count of student scores at or below 40.
    """

    pass
def count_failed_students ( student_scores ) : pass