@[nth_element](/space/show?uid=77131) 不要全开long long，块的大小应为 $n^{2/3}$
by NaCly_Fish @ 2019-07-06 00:55:57
@[nth_element](/space/show?uid=77131) 帮您改好后AC了：[R20345267](https://www.luogu.org/recordnew/show/20345267)
by NaCly_Fish @ 2019-07-06 00:58:56
thank you.%%%@[NaCly_Fish](/space/show?uid=115864)
by nth_element @ 2019-07-06 13:10:59