说明：  排课算法描述 在描述算法之前我们把一些概念先讲清楚。在这里我们把从行政角度分的班叫自然班，把在同一个教室上课的班叫做排课班。在大学里有些公共课是几个排课班通过多媒体来一起上的，我们把这个排课班的总和叫做公共班。班级、教室、教师、课程都维护着自己的一张课表。对课表的每个表元（如星期一的第一节课）在这里称做时间片。
(Course Scheduling algorithm description in describing the algorithm to some of the concepts before we talk about clear. Here we divided the classes from the administrative point of view is called the natural class to class in the same class is called arranging classes. Some public courses in the university is arranging a few classes together through the media to the, we call this the sum of arranging class public class. Classes, classrooms, teachers, curriculum maintains a schedule of their own. Each table element of the curriculum (such as Monday' s first class) here called time slots.)