> For the complete documentation index, see [llms.txt](https://mnunknown.gitbook.io/algorithm-notes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mnunknown.gitbook.io/algorithm-notes/segment_and_fenwick_tree.md).

# Segment & Fenwick Tree，区间树

## 这组问题的分类上基本延续了九章高级算法班的大纲，加了些听课时候的笔记，和自己之后查资料的思考。