# [Jelly], 16 [bytes] ‘ŒPŒcIQLƲÐṀLÐṂṬṚ A monadic Link that accepts the ruler length, \$N\$, and yields all perfect rulers of length \$N\$ as lists of binary marks ordered numerically. **[Try it online!][TIO-m3etrb7l]** Or see the [test-suite]. [Jelly]: https://github.com/DennisMitchell/jelly [bytes]: https://github.com/DennisMitchell/jelly/wiki/Code-page [TIO-m3etrb7l]: https://tio.run/##y0rNyan8//9Rw4yjkwKOTkr2DPQ5tunwhIc7G3xAZNPDnWse7pz1//9/MwA "Jelly – Try It Online" [test-suite]: https://tio.run/##AT8AwP9qZWxsef//4oCYxZJQxZJjSVFMxrLDkOG5gEzDkOG5guG5rOG5mv/Dh8WS4bmY4oG4LGrigb46wrYpWf//MTI "Jelly – Try It Online"