Codeforces Round #818 (Div. 2) Editorial.

Правка en6, от purplesyringa, 2022-09-03 12:30:18

Problem A. Idea by Igorbunov

Hint 1
Solution

Problem B. Idea by FairyWinx

Hint 1
Hint 2
Hint 3
Hint 4
Solution

Problem C. Idea by FairyWinx

Hint 1
Hint 2
Hint 3
Solution

Problem D. Idea by FairyWinx

Hint 1
Hint 2
Solution

Problem E. Idea by FairyWinx

Hint 1
Hint 2
Hint 3
Solution

Problem F. Idea by TeaTime, tutorial by purplesyringa

Editorialist's note: I didn't submit the solution myself, but I proved it theoretically, aggregated solutions of problemsetters as well as participants, so I'm fairly sure it's correct, but you might want to treat it with more suspicion.

Hint 1
Hint 2
Hint 3
Solution

История

 
 
 
 
Правки
 
 
  Rev. Язык Кто Когда Δ Комментарий
ru7 Русский purplesyringa 2022-09-05 00:03:30 93
en10 Английский purplesyringa 2022-09-04 20:19:39 7 Tiny change: 'ities in two cases:\n\' -> 'ities in three cases:\n\'
en9 Английский purplesyringa 2022-09-04 20:17:18 876 Add a note on Edmonds-Karp's algorithm usage in F
en8 Английский purplesyringa 2022-09-04 20:10:19 1391 Fix invalid complexity proof in F
en7 Английский purplesyringa 2022-09-03 22:16:18 1 Tiny change: 'Programmer aren't ma' -> 'Programmers aren't ma'
en6 Английский purplesyringa 2022-09-03 12:30:18 1213
ru6 Русский purplesyringa 2022-09-03 02:25:30 44 Fix a bug in A and a typo in C hint
en5 Английский purplesyringa 2022-09-03 02:24:45 132 Fix a bug in A and a typo in C hint
en4 Английский purplesyringa 2022-09-03 02:20:53 3540 Add problem F tutorial
en3 Английский FairyWinx 2022-09-03 01:20:53 2 Tiny change: 'es in $\bimom{n}{i}$ ' -> 'es in $\binom{n}{i}$ '
en2 Английский FairyWinx 2022-09-03 01:03:05 15
en1 Английский purplesyringa 2022-09-03 01:01:01 6610 Add English translation
ru5 Русский FairyWinx 2022-09-02 22:27:39 1717 (опубликовано)
ru4 Русский FairyWinx 2022-09-02 17:22:43 0 Мелкая правка: '\n\n<spoiler' -> '\n<spoiler'
ru3 Русский FairyWinx 2022-09-02 14:11:01 0 Мелкая правка: '\n\n<spoiler' -> '\n<spoiler'
ru2 Русский FairyWinx 2022-09-02 12:18:37 3 Мелкая правка: '\n\n<spoiler' -> '\n<spoiler'
ru1 Русский FairyWinx 2022-09-02 12:17:57 4008 Первая редакция (сохранено в черновиках)