Contest Introduction
We are pleased to invite you to participate in Codeforces Round 1103 (Div. 3) on Jun/12/2026 17:35 (Moscow time). This round will feature 7-8 problems aimed at creating an interesting competition for participants rated 1599 or lower. Those rated 1600 or higher can register for the round unrated.
Contest Rules
The round will be hosted under educational round rules (extended ICPC). All solutions will be judged on preliminary tests during the round, and after the round, there will be a 12-hour phase of open hacks. After this phase, all accepted solutions will be rejudged based on successful hacks. We have made every effort to ensure reliable tests — just like you, we will be very disappointed if many participants' solutions are hacked after the contest ends.
You will have 2 hours and 30 minutes to complete 7-8 tasks. Note that the penalty for a wrong submission in this round is 10 minutes. Only trusted participants of the third division will be included in the official standings table.
Participation Criteria
To qualify as a trusted participant of the third division, you must:
- Participate in at least five rated rounds (and solve at least one problem in each of them)
- Not have a rating of 1900 or higher.
Regardless of whether you are a trusted participant or not, if your rating is less than 1600, then the round will be rated for you.
Special Thanks
The problems have been created and written by arsen1y, dvb1r, and me. Special thanks to Vladosiya for excellent coordination, and to Friendiks and Treks for red testing, among many others.
We look forward to your participation!
Conclusion
P.S. Try to match the authors in the following photo!
Blogger's Review: The organizers have made tremendous efforts to ensure fairness and engagement in this contest, particularly with the design of the open hack phase which will provide participants with more challenges and opportunities. It's definitely worth looking forward to!