`c[i]` 存下标为 `i-lowbit(i)+1` 到 `i` 的元素和
by Celestial_Scarlet @ 2021-11-22 23:10:30
~~很多树状数组教程都有介绍吧~~
下面是我认为还比较清楚的一张图
by lym12321 @ 2021-11-22 23:13:56
$(i-lowbit(i),i]$
by RyexAwl @ 2021-11-22 23:36:43
就是数组里存二项树
by hly1204 @ 2021-11-23 07:33:09
谢谢大佬，早上起来突然明白了，此贴完结
by _Goodnight @ 2021-11-23 22:26:13