I think there should be a way to resubmit small after marked correct,
because if you send correct output but wrong source you will get it marked
as correct, but it will be marked incorrect later, and even if you realize
such a mistake during competition (usually while sending large) you are
unable to recover from it.

With current behavior you can't resubmit the small, so this scenario is
worse than having a bad algorithm, because you can still fix it. And I know,
contestants should be careful about their submissions, but I don't think
anybody prefers to penalize someone who solved the problem but attached the
incorrect source over someone who carelessly wrote a buggy or slow code.

If the contest ends, and whoever submitted a wrong source code didn't fix it
during competition, marking it as incorrect is the right approach, or else
there could be many cheating involved. But allowing resubmission to those
who realize their mistake on time, puts them at least on the same position
as someone who didn't check the limits or corner cases during their first
attempts.

Personally, I would like to have a way to resubmit the small in such a case,
you would of course get a wrong submission, the 4 minute penalty that
implies and your submission time is worse than before. But at least you
don't lose all points having the correct solution all along.

Maybe instead of disabling small after correct submissions, have a dialog
saying "you already solved this, attempting it again will increase your
penalty" or something along the lines. Or enabling a "mark as incorrect" on
"my submissions" view, after which you can resubmit, although this approach
seems more risky and easier to make mistakes.

Thanks,
Carlos Guía

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