(student_info)
:param student_info: list of [<student name>, <score>] lists
    :return: first `[<student name>, 100]` or `[]` if no student score of 100 is found.
:param student_info: list of [<student name>, <score>] lists
    :return: first `[<student name>, 100]` or `[]` if no student score of 100 is found.
: param student_info : list of [ <student name > <score > ] lists : return : first [ <student name > 100 ] or [] if no student score of 100 is found .
def perfect_score(student_info):
    """
    :param student_info: list of [<student name>, <score>] lists
    :return: first `[<student name>, 100]` or `[]` if no student score of 100 is found.
    """
    pass
def perfect_score ( student_info ) : pass