sun所在学校的教室座位每天都是可以预占的。
一个人可以去占多个座位，而且一定是要连续的座位，如果占不到他所要求的这么多座位，那么他就一个座位也不要了。为了降低难度，每次分配座位按座位号从小到大查找，采用最先适配法分配座位。(The classroom seats at sun are available every day.　　　　　 A person can go to more than one seat, and must be a continuous seat, if you can not account for so many seats he requested, then he would not have a seat. In order to reduce the difficulty, each seat is allocated according to seat number from small to large, and the seats are allocated by the first fit method.)