Each solution file must be entirely self-contained (i.e., should not import code from any other adjacent files in your submission directory).  In addition, all imports are restricted to those in the [Python Standard Library](https://docs.python.org/3/library/index.html) — programs that do not adhere to these restrictions will fail ~~be disqualified~~.

~~Note: *Some of these constraints are not (yet) fully enforced, but all will be imposed for teams seeking prize eligibility.*~~ The security constraints have been deployed.

(Updated August 19th).