Welcome all to the next Codeforces Format round!
In this round I will replace Artem Rakhov in his usual role of contest administrator: Artem have set out to America to take part in TopCoder Open Algorithm onsite. Good luck, Artem!
The contest has ended, results.
All tests to the contest problems:
Thanks to Michael Mirzayanov and Julia Satushina who helped to prepare this round.