Educational Codeforces Round 3

Revision en4, by Edvard, 2015-12-20 20:32:01

Hi, Codeforces!

Educational Codeforces Round 3 will take place on 19 December 2015 at 18:00 MSK for the first and second divisions. You can read about educational rounds here and here. A lot of time have passed since the previous round. I hope that the next rounds will be more regular.

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The round will be unrated for all users and it will be held with extented ACM ICPC rules. You will have two hours to solve six problems. After that you will have one day to hack any solution you want. You will have access to copy any solution and test it locally.

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This time the round was prepared not only by me, Edvard Davtyan. Firstly, thanks a lot to Alexey Dergunov dalex who shared one of his problems with well-known idea. Also thanks a lot to Alexandr Frolov fcspartakm, Vitaliy Kudasov kuviman and Arthur Svechnikov ikar for their help in preparing problems. MikeMirzayanov helped us to invent the problems. Also thanks a lot to Maria Belova Delinur for translating the problems from my RussianEnglish to English :-)

I hope you will enjoy the problems.

Good luck and have fun!

UPD1: The first part of competition is over. I hope that you enjoyed the problems. Now you let's hack other solutions :-)

UPD2: The editorial is ready.

UPD3: The round is over. All solutions are rejudged on full testset. The results are final.

Tags education round 3, announcement


  Rev. Lang. By When Δ Comment
en5 English Edvard 2015-12-20 22:34:38 32 Tiny change: 'are final.' -> 'are final.\n\nUPD4: 6725 rows affected :-)'
ru12 Russian Edvard 2015-12-20 22:34:22 32 Мелкая правка: 'чательные.' -> 'чательные.\n\nUPD4: 6725 rows affected :-)'
ru11 Russian Edvard 2015-12-20 21:30:27 71
ru10 Russian Edvard 2015-12-20 21:27:01 2
ru9 Russian Edvard 2015-12-20 21:26:13 69
en4 English Edvard 2015-12-20 20:32:01 95
ru8 Russian Edvard 2015-12-20 20:31:39 106
en3 English Edvard 2015-12-20 03:55:03 6 Tiny change: 'torial is about [ready](h' -> 'torial is [ready](h'
en2 English Edvard 2015-12-20 02:56:11 206
ru7 Russian Edvard 2015-12-20 02:54:35 180
ru6 Russian Edvard 2015-12-19 01:41:56 6
en1 English Edvard 2015-12-19 01:06:29 1488 Initial revision for English translation
ru5 Russian Edvard 2015-12-19 00:49:06 21 Мелкая правка: 'вой [user:mbelova], которая' -> 'вой [user:Delinur], которая'
ru4 Russian Edvard 2015-12-19 00:48:24 90
ru3 Russian Edvard 2015-12-19 00:46:26 2
ru2 Russian Edvard 2015-12-19 00:45:49 0 (опубликовано)
ru1 Russian Edvard 2015-12-19 00:44:25 1983 Первая редакция (сохранено в черновиках)