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

# Bit

- [307.Range-Sum-Query---Mutable](https://wentao-shao.gitbook.io/leetcode/bit/307.range-sum-query-mutable.md)
- [308.Range-Sum-Query-2D---Mutable](https://wentao-shao.gitbook.io/leetcode/bit/308.range-sum-query-2d-mutable.md)
- [315.Count-of-Smaller-Numbers-After-Self](https://wentao-shao.gitbook.io/leetcode/bit/315.count-of-smaller-numbers-after-self.md)
- [493.Reverse-Pairs](https://wentao-shao.gitbook.io/leetcode/bit/493.reverse-pairs.md)