说明：  会场安排，使用了3个向量存储开始时间和结束时间和两个时间的合并，并且排好了序。 用一个栈模拟活动的进行，压栈代表需要新开一个活动，出栈表示有一个活动结束
(The venue arrangements, the use of three vectors stored start time and end time and the time the merger of the two, and lined up the sequence. With a stack simulation activities, push open a representative of the need for new activities, a stack that there is a conclusion of the event)