# Page Not Found

The URL `code/week-20` does not exist.

You might be looking for one of these pages:
- [Session 20](https://www.computersciencea.com/older/session-20.md)
- [Session 20](https://www.computersciencea.com/group/session-20.md)
- [Session 21](https://www.computersciencea.com/older/session-21.md)
- [Session 22](https://www.computersciencea.com/older/session-22.md)
- [Session 23](https://www.computersciencea.com/older/session-23.md)

## How to find the correct page

1. **Browse the full index**: [/sitemap.md](https://www.computersciencea.com/sitemap.md) - Complete documentation index
2. **View the full content**: [/llms-full.txt](https://www.computersciencea.com/llms-full.txt) - Full content export

## Tips for requesting documentation

- For markdown responses, append `.md` to URLs (e.g., `/older/session-20.md`)
- Use `Accept: text/markdown` header for content negotiation