> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/4.md).

# 4

- [4-rings or 4-squares puzzle](https://trizen.gitbook.io/sidef-lang/programming_tasks/4/4-rings_or_4-squares_puzzle.md)