IOI 2025 Crystal Ball 🔮 Contest
According to tradition, we are going to host the IOI 2025 Prediction Game.
Over the next 5 days, you can submit your predictions for the top 10 contestants in the upcoming competition.
You can make your predictions at: https://qoj.ac/voting_game/vote?competition=ioi2025
The deadline to update your prediction is July 30, 2025 at 10 P.M. (UTC +8). That is, the start of the first contest.
Rules:
You need to predict the 1st to 10th place winners. Each contestant can only be nominated once. If the final rankings result in a tie, any position within the tied range will be considered a correct prediction.
- For each contestant you nominate who finishes in the top 10, you earn 3 points.
- For each contestant you nominate who finishes in the top 20 but not top 8, you earn 2 points.
- If you predict the exact rank of a contestant:
- You receive the 3 base points as above.
- Additionally, your first exact prediction earns 10 bonus points, the second earns 20 bonus points, the third earns 30, and so on.
- If you leave a rank blank (i.e., choose not to make a prediction for that rank), you receive 1 point for that empty slot.
If some contestants are tied for places l to r, predicting them as finishing in any position from l to r counts as correct.
Ranking:
Participants in the Prophet Game will be ranked first by their final score, and then by the time of last edit (earlier edits rank higher in case of a tie).
We will post the final leaderboard after the contest is over.
World Finals 2025 Crystal Ball 🔮 Contest
According to tradition, we are going to host the World Finals 2025 Prediction Game.
Before the start of the contest session of The 49th ICPC World Finals, you can submit your predictions for the top 12 contestants in the upcoming competition.
You can make your predictions at: https://qoj.ac/voting_game/vote?competition=wf2025
The deadline to update your prediction is September 4th, 2025 at 3 P.M. (UTC +8). That is, the start of the contest session.
Rules:
You need to predict the 1st to 12th place winners. Each team can only be nominated once.
- For each contestant you nominate who finishes in the top 12, you earn 3 points.
- You receive additional 5 points if you predicted the medal of that team correctly (so 3+5 = 8 points overall).
- You receive additional 7 points if you predicted the place of that team correctly (so 3+5+7 = 15 points overall).
- For each contestant you nominate who finishes in the top 24 but not top 12, you earn 2 points.
- If you leave a rank blank (i.e., choose not to make a prediction for that rank), you receive 1 point for that empty slot.
Ranking:
Participants in the Prophet Game will be ranked first by their final score, and then by the time of last edit (earlier edits rank higher in case of a tie).
We will post the final leaderboard after the contest is over.