Codeforces Round #770 (Div. 2) editorial

Revision en8, by sevlll777, 2022-02-06 20:55:45

Thank you for participating, we hope you enjoyed the problems! We kindly ask you to rate each of the round's problems in the corresponding spoiler in order to improve the quality of future contests.

You can also check video editorials of problems B and C on ak2006 Youtube channel.

All problems were prepared by Alexdat2000 with the help of coauthors.

Why didn't AI participate

1634A - Reverse and Concatenate
Idea: sevlll777

Hint 1
Hint 2
Tutorial
Solution
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1634B - Fortune Telling
Idea: crazyilian and antontrygubO_o

Hint 1
Hint 2
Hint 3
Tutorial
Solution
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1634C - OKEA
Idea: sevlll777

Hint 1
Hint 1.1
Hint 2
Tutorial
Solution
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1634D - Finding Zero
Idea: sevlll777

Hint 1
Hint 2
Hint 2.1
Hint 3
Tutorial
Solution
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1634E - Fair Share
Idea: sevlll777

Hint 1
Hint 2
Hint 3
Hint 4
Tutorial
Solution
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1634F - Fibonacci Additions
Idea: Mangooste

Hint 1
Hint 2
Hint 3
Tutorial
Solution
Rate the problem
Tags 179 contest, editorial

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en8 English sevlll777 2022-02-06 20:55:45 355
ru15 Russian sevlll777 2022-02-06 20:53:10 345 Мелкая правка: 'l:1634A]\n</div><' -> 'l:1634A]\n[submission:145468383]\n</div><'
en7 English purplesyringa 2022-02-06 20:08:26 17
en6 English sevlll777 2022-02-06 20:07:45 0 (published)
ru14 Russian sevlll777 2022-02-06 20:06:41 0 (опубликовано)
en5 English sevlll777 2022-02-06 19:55:15 88
ru13 Russian sevlll777 2022-02-06 19:54:03 86
en4 English sevlll777 2022-02-06 19:30:23 164
ru12 Russian purplesyringa 2022-02-05 14:15:31 539
en3 English purplesyringa 2022-02-05 14:07:19 23
en2 English purplesyringa 2022-02-05 14:02:38 659
en1 English Alexdat2000 2022-02-05 11:44:18 13619 Initial revision for English translation (saved to drafts)
ru11 Russian Alexdat2000 2022-02-05 11:17:13 62 Мелкая правка: ' число $y$>>. Тогда ' -> ' число $y$?>>. Тогда '
ru10 Russian sevlll777 2022-02-04 23:16:46 2 Мелкая правка: 'orial:1634С]\n</div><' -> 'orial:1634C]\n</div><'
ru9 Russian sevlll777 2022-02-04 23:13:25 2 Мелкая правка: 'orial:1634B]\n</div><' -> 'orial:1634С]\n</div><'
ru8 Russian sevlll777 2022-02-04 23:08:26 153
ru7 Russian Alexdat2000 2022-02-04 22:35:37 21 Мелкая правка: '022-02-02].\n\n[prob' -> '022-02-02] при помощи соавторов.\n\n[prob'
ru6 Russian sevlll777 2022-02-03 12:49:33 60
ru5 Russian sevlll777 2022-02-03 12:48:13 1176
ru4 Russian sevlll777 2022-02-02 17:45:18 6 Мелкая правка: 'problem:1634A]<br>\nИд' -> 'problem:1600A]<br>\nИд'
ru3 Russian Alexdat2000 2022-02-02 17:38:09 1 Мелкая правка: 'произойдет если прим' -> 'произойдет, если прим'
ru2 Russian sevlll777 2022-02-02 16:51:47 12299 Мелкая правка: 'у чисел $a^b$ и $a+b$, для лю' -> 'у чисел $a \oplus b$ и $a + b$, для лю'
ru1 Russian sevlll777 2022-02-02 15:31:32 8 Первая редакция (сохранено в черновиках)