We gladly invite you to participate in the Three Quarterfinals Tournament – a team-based online programming competition parallel to the ACM ICPC Subregionals in Moscow, Minsk and Saint-Petersburg. The tournament will be organized by the team of Yandex.Contest, Oleg Hristenko (snarknews) and the jury of the Subregionals. The online rounds will be held on the Yandex.Contest system. The dates and start times of subregionals are: Moscow (registration) – October 21st, 14:00 MSK, Minsk (registration) – October 28th, 11:00 MSK, Saint-Petersburg (registration) – November 3rd, 12:00 MSK.

Teams that participate in the onsite version of one of the three quarterfinals will be able to participate in the online versions of the other two quarterfinals via Yandex.Contest. Teams that don’t participate in any of the three quarterfinals onsite will be able to participate in all of them online via Yandex.Contest. The results achieved by a team in all of the rounds, online and onsite, will be summed up, and there will be a combined scoreboard based on the Grand Prix 30 scoring system.

You can register for the online rounds at any time since the appropriate link is posted until the start of the competition. To create a team in the Yandex.Contest system, please follow the link «My teams». Each invited team member has to confirm his participation in the team. After you have successfully created your team, you should register it for the competition by specifying the team.

The rules of the online rounds are the same as the rules of the onsite quarterfinals.

You can try out the system and practice submitting problems using the test contest A + B virtual.

Several people may answer your questions and comments to this post, including Vladimir Ten (vtenity), Lev Tolmachev (lev.tolmachev), Vitaly Goldstein (goldvitaly), Oleg Hristenko (snarknews).

Check for updates!

UPD. Moscow subregional online version will start at 14:00 MSK on October 21st, so that everybody has a chance to participate in the Codeforces Round 146 and CodeChef cook-off.

UPD.2 We've added the registration links and the exact start times for all three contests :

1. Moscow QF — October 21st, 14:00 MSK.
2. Minsk QF — October 28th, 11:00 MSK.
3. Saint-Petersburg QF — November 3rd, 12:00 MSK.

UPD.3 Both the official results and the online round results for the ACM ICPC subregional in Moscow are available in the monitor. Teams which participated in the ACM ICPC subregional in Moscow and want to participate in the tournament should register to the other two rounds and set their team nickname in the Yandex.Contest system to be the same or almost the same as their official team name. Teams which participated in the online round of the subregional and which will participate in the ACM ICPC subregionals in Minsk or Saint-Petersburg should set their team nickname in the Yandex.Contest system to be the same as their official team name.

UPD.4 We've published the joined monitor of the two completed rounds. In the case of equal scores for two teams according to the Grand Prix 30 scoring system, ties are broken using the sum of IFMO ratings for all rounds as in the OpenCup. We apologize that the rules for breaking ties were not announced beforehand. We pay your attention to the fact that the join is made using the nicknames of the teams in the Yandex.Contest system. If your team participated in both rounds but didn't get the results summed up, please comment. Please set up your nickname for the third round exactly the same as the nickname of your team in the joined monitor. We're going to add the third round to the joined monitor as soon as the first submission is made. We hope that the current joined monitor will be updated regularly during the third round according to the standings. Some discrepancy may exist as the teams which participate in the official subregional may have different nicknames there, and it will take some time to join their results in.