@[black_trees](/user/304550) RE可能是WA了,因为强制在线异或错误的答案后产生了大于 $n$ 的询问吧
by ღꦿ࿐ @ 2022-09-25 15:00:05
你"f[si][20]"开小了。
by grass8cow @ 2022-09-25 18:15:41
@[Apollo13](/user/223624) 卧槽,我是shaber
by black_trees @ 2022-09-25 21:48:29