@[chen_zhe](https://www.luogu.org/space/show?uid=8457) @[yjjr](https://www.luogu.org/space/show?uid=5088)
by 花千树 @ 2018-04-02 19:43:33
@[chen_zhe](/space/show?uid=8457) @[yjjr](/space/show?uid=5088)
by pufanyi @ 2018-04-23 11:19:35
@[chen_zhe](/space/show?uid=8457) @[yjjr](/space/show?uid=5088)
by 该起什么名字 @ 2018-05-25 09:47:41
@[陶文祥](/space/show?uid=56561) 感谢您的贡献
by chen_zhe @ 2018-05-25 17:59:53
有毒吧，明明是1/k=1/x+1/y
by 卢老爷 @ 2018-06-06 22:03:03
@chen_zen
by 卢老爷 @ 2018-06-06 22:03:32
@[chen_zhe](/space/show?uid=8457)
by 卢老爷 @ 2018-06-06 22:03:49