@[noip](/space/show?uid=3296) @[zcysky](/space/show?uid=2978) @[krydom](/space/show?uid=24611)
by icy @ 2018-02-02 12:44:55
emmm，我K-Dtree $O(n\sqrt n)$过了
by Mingoal @ 2018-07-21 21:47:02