Allow different kind of question/contest

[hallucinogen]

Currently our questions are stdin -> stdout based. This is no longer common and not used for professional setup. If we want to work with professional (and not just students) we need to implement function -> output question sets (a'la Topcoder/LeetCode)

[AVM-Martin]

This kind of questions already available on TLX. Those problems are categorized under functional problem type (see https://tlx.toki.id/problems?tags=engine-functional) and being implemented on APIO (since 2020, cmiiw) and IOI. You can check it there

[hallucinogen]

NICE!! Lemme check them out! This is good

[hallucinogen]

I've checked it out - I think it's not quite what is expected.

The reason is while this "feels" functional, the barrier of entry to do this is still quite high (compare it with LeetCode online editor or Hackerrank)

I think LeetCode is a good comparison

The success metric is how many professional who want to use this platform contest (either as a way to practice, or finding job through contest sponsorship)