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Also many thanks to fcspartakm, Tommyr7 for their help in preparation and Pavel Kunyavskiy, winger, Alex Fetisov, Errichto, epifanov, immortal CO and qwerty787788 for testing the problems! Division 1 is welcome aswell :)My gratitude to Grisha (gritukan) for round coordination, Ildar (300iq), Nikita (neckbosov), Azat (ismagilov.code), Eugene (rek) and Oleg (x3n) for testing and Mike (Mike Mirzayanov) for awesome Codeforces and Polygon. When you open talk with the person, all messages sent to you by the corresponding person automatically become read. Series of Educational Rounds continue being held as Harbour. You can read the details about the cooperation between Harbour. The problems were prepared by Roman Ajosteen Glazov, Adilbek adedalic Dalabaev and me.We'd like to thank Mikhail Pik Mike Piklayev and Ivan Bled Dest Androsov for the help in preparing the round. UPD Editorial UPD2Congratulations to the winners: Hello codeforces!Previously, Codeforces blog posts can either be published together with the translation, or both versions can be hidden in drafts.Now a blog post can be published or hidden in drafts separately from its translation.I'm glad to announce that codeforces round #473 for the second division will take place on Tuesday April 3rd UTC.