What if they think you might have cheated, so they cancel the entire entrance exam for everyone because your potential, unproven, cheating would have given you an unfair advantage over the other students?
In this case, one person suspected of cheating (only suspected, he is not convicted or even charged with anything at all!) has led to the annulment of the entire exam. Only one of the candidates was found to have cheated, during their campaign. The voting process was found to be perfectly secure and to accurately reflect the intention of the people who voted. And yet, the entire election, starting not just from the vote, but from the moment that all candidates registered and started their campaign, has been annulled and started from scratch.
Any party who wishes to participate in the elections will have to start from step 0, from collecting 200k signatures of people who support their candidacy.
This is not fraud. Voting fraud is when you manipulate ballots. It's amazing how well intentioned people here tend to believe that voters are influenced toddlers who can't be trusted. Why even have elections?
Bad analogy, a student is not being evaluated for a position where he controls the lives of millions.
10 people were competing for president, a position with significant power. Whoever you elect will have powers immediately so you cannot afford to kick cheaters out after the fact, only before.
This election game is played in two rounds. If you find a cheater before the first round, what happens if you remove him? There's 9 left. What about in the second round where it's 1v1? You just gave away the presidency to last candidate.
Romania acted too late in kicking the cheater out. Maybe there were reasons for that, but this means re-running the elections without the cheater might be the lesser evil.