[Prizes RF Only / Statements EN & RU] Prizes from Sirius Educational Centre: IOI-format Contest!
⚠️ NOTICE FOR INTERNATIONAL USERS
Good news: All problem statements will be fully available in both English and Russian! You are more than welcome to participate and solve the problems. Please note that physical prize delivery is strictly limited to the Russian Federation via Ozon, but everyone can compete for fun and practice!
Good day, dear Codeforces users!
We are glad to present you a contest that is fully identical to the selection process for the computer science educational program at the Sirius Educational Centre. Over the course of three weeks, exciting problem sets await you. The top participants will receive prizes personally from me and the Sirius Educational Centre!
IMPORTANT: Participation Restriction
We kindly request those who have already participated in the official selection for the "Informatics. Regions" program at Sirius: please do not participate in this contest. The problems will be completely identical!
Schedule and Registration Links
- Round 1 (General Selection):
- Date and Time: 03.10.2026 at 17:35 (Moscow time, UTC+3).
- Duration: 3 hours.
- Who can participate: Everyone is welcome!
- Registration Link: Qualification Stage
- Results publication: No later than 10.10.2026.
Round 2 (Finals by Tracks):
- Date and Time: 18.10.2026 at 17:35 (Moscow time, UTC+3).
- Duration: 1 hour.
- Who can participate: Everyone is welcome (however, only those who passed Round 1 are eligible for prizes).
- Registration Links:
- Final results publication: No later than 23.10.2026.
Round 1 Rules and Scoring System
- Format: You will be given 7 problems, with a maximum score of 100 points for each.
- Testing System: The contest uses IOI rules. Each problem contains subtasks with a fixed number of points (details can be found in the problem notes).
- Grading details: WA, TLE, MLE, or any other verdicts on individual tests do not stop the grading process — your solution will be tested on all test cases in the set.
- Standings ranking: Participants are sorted by the number of problems solved with a score of 80+ points. In case of a tie, the total number of points is used.
- Advancement criterion: At least 30% of all participants are guaranteed to advance to the second stage. Passing scores and lists will be published no later than 10.10.2026.
Round 2: Tracks and Distribution
The final round is split into two parallel competitions: 1. DSA-Basic (Algorithms and Data Structures: basic level). 2. DSA-Advanced (Algorithms and Data Structures: advanced level).
Please note: In the second round, the problems on both tracks will also be evaluated using the IOI system with a maximum score of 100 points per problem.
Access to solving problems will be open to all users, but only those who successfully passed Round 1 can compete for prizes. Based on the results of the first stage, you may be assigned one of three statuses:
- Choice — you scored a high mark and can officially participate in either of the two tracks in Round 2 with a chance to win a prize.
- DSA-Basic — you passed the selection, but you can only claim prizes if you participate in the basic track.
- DSA-Advanced — a mandatory status for participants who have ever had a rating of 1600+ and scored enough points to pass. You can only participate in the advanced track.
Based on the results of Round 2, the Top-1 among official participants in each track will receive prizes!
Prize Delivery Information
- Prizes are shipped exclusively via the Ozon delivery service and only within the Russian Federation (no shipping outside the RF).
- If you win a prize, you need to contact me personally and provide the address of the specific Ozon pickup point (PVZ) where the package should be sent.
- If there is no Ozon pickup point in your city, but you live within the RF, the delivery will be handled individually — in this case, you must also contact me to arrange it.
Important Restrictions and Fair Play Rules
- Rating restrictions: We do not recommend participating for users with a rating above 1800. Users with a rating above 1900 are not eligible for prizes.
- Anti-cheat: A strict fair play policy applies to this contest. The use of AI (ChatGPT, etc.), assistance from third parties, and plagiarism are strictly prohibited. Violators will be disqualified, and their accounts will be banned.
Acknowledgments
We express our deepest gratitude to the Sirius Educational Centre for providing the educational materials and problems! Special thanks to my friend and tester — zeyd1234.
If you have any questions regarding the rules, scoring system, or advancement criteria, feel free to ask them in the comments below, and I will surely reply!
Good luck to everyone!
