似乎是Sparse Table来着
by Kalista @ 2018-05-31 20:48:09
楼上正解
by かなで @ 2018-05-31 20:51:42
谢谢大佬
by gzw2005 @ 2018-05-31 21:01:23
@[突然颓废](/user/53118) 稀疏表
by tzc_wk @ 2020-05-04 18:55:17