> 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/basic-knowledge.md).

# Basic Knowledge

- [Binary Tree](https://wentao-shao.gitbook.io/leetcode/basic-knowledge/binary-tree.md)
- [Bit Operation](https://wentao-shao.gitbook.io/leetcode/basic-knowledge/bit-operation.md)
- [Heapify](https://wentao-shao.gitbook.io/leetcode/basic-knowledge/heapify.md)
- [Java Syntax](https://wentao-shao.gitbook.io/leetcode/basic-knowledge/java-syntax.md)
- [Monotonous Stack](https://wentao-shao.gitbook.io/leetcode/basic-knowledge/monotonous-stack.md)
- [Trie Tree](https://wentao-shao.gitbook.io/leetcode/basic-knowledge/trie-tree.md)