没加换行无法AC！
by 此店不售此书 @ 2019-02-02 23:48:41
幸好读题了，PDF里的样例换行了
by Maktub @ 2019-02-06 20:51:58
感谢大佬提醒 @[此店不售此书](/space/show?uid=103434)
by sel_fish @ 2019-07-18 19:27:57