# Page Not Found

The URL `1_program_basic/3_algorithm/8-hui-su` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [回溯问题](https://embedded.xym.work/01-ji-suan-shi-shen-me/1_1program_basic/3_algorithm/8-hui-su.md)
- [数组](https://embedded.xym.work/01-ji-suan-shi-shen-me/1_1program_basic/3_algorithm/1-shu-zu.md)
- [排序](https://embedded.xym.work/01-ji-suan-shi-shen-me/1_1program_basic/3_algorithm/2-pai-xu.md)
- [递归](https://embedded.xym.work/01-ji-suan-shi-shen-me/1_1program_basic/3_algorithm/7-di-gui.md)
- [哈希表](https://embedded.xym.work/01-ji-suan-shi-shen-me/1_1program_basic/3_algorithm/3-ha-xi-biao.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://embedded.xym.work/01-ji-suan-shi-shen-me/1_1program_basic/3_algorithm/8-hui-su.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://embedded.xym.work/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://embedded.xym.work/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/01-ji-suan-shi-shen-me/1_1program_basic/3_algorithm/8-hui-su.md`).

You may also use `Accept: text/markdown` header for content negotiation.