update doc according to issues

        PASS_OF_FAIL, HUNDRED_MARK_SCORE

    }

    //A courseId is valid if it has been added to the system with addCourse()

    // do not check whether it is 'CS307' or '307CS'

    public String id;

    public String name;

    public int credit;

    /**

     * List all time conflicting courses' full name, sorted alphabetically.

     * Course full name: String.format("%s[%s]", course.name, section.name)

     *

     *  Course conflict is when multiple sections belong to the same course.

     *  Time conflict is when multiple sections have time-overlapping classes.

     *  Note that a section is both course and time conflicting with itself!

     */

    public List<String> conflictCourseNames;

}

public class CourseSectionClass {

    public int id;// it is the id of course section class

    public Instructor instructor;

    public DayOfWeek dayOfWeek;

    public DayOfWeek dayOfWeek;// We ensure the test semesters begin with Monday.

    // the given elements in weekList are sorted.

    // CourseSectionClasses in same courseSection may have different weeklist.

    public List<Short> weekList;

    //the time quantum of start and end.

    //For example: classStart is 3 while classEnd is 4

import java.sql.Date;

/**

 * In our benchmark, there won't be overlapped semesters.

 */

public class Semester {

    public int id;

    public String name;

    /**

     * If the end date is before the start date, you need give an illegal Argument Error

     * If the date is ridiculous, such as 1900-1-1 or 3000-1-1, it should not give error.

     */

    public Date begin, end;

}

package cn.edu.sustech.cs307.dto;

public abstract class User {

    public int id;

    /**

     * A user's full name is: first_name || ' ' || last_name, if both first name and last name are alphabetical, otherwise first_name || last_name.

     *

     * For example, if a user has first name David and last name Lee then the full name is David Lee; if another user has first name 张 and last name 三, the full name is 张三.

     */

    public String fullName;

}