@[lin_toto](/space/show?uid=256)
by qianfujia @ 2018-04-21 21:29:43
看这个数据范围好像是有$O(2^{\frac{n}{2}})$的解法……
by AThousandSuns @ 2018-04-21 21:55:47
@[AThousandSuns](/space/show?uid=72118) 话说这提保不保证有唯一解
by FCBM71 @ 2018-05-30 21:05:15
@[FCBM71](/space/show?uid=45176)
显然保证有唯一解啊qwq
by misinclair @ 2018-06-06 18:16:56