@[tuxuanming2024](/user/481854) Stop learning 3log tree of tree, go and solve some problems, learn how to use 2log tree of tree.
by Prean @ 2022-04-17 19:46:19
@[Prean](/user/160839) 翻译：用log^2做法(整体二分或主席树,也有人说是树状数组套权值线段树)
by masterhuang @ 2022-05-07 16:53:33