Codeforces Round #676 (Div. 2) Editorial

Revision en14, by stefdasca, 2020-10-18 14:07:27

1421A — XORwice

Idea and solution: flaviu2001

Hint
Solution

1421B — Putting Bricks in the Wall

Idea: flaviu2001, solution: flaviu2001 and stefdasca

Hint
Solution

1421C — Palindromifier

Idea and solution: flaviu2001

Hint
Solution

1421D — Hexagons

Idea: flaviu2001, solution: flaviu2001 and koala_bear00

Hint
Solution

1421E — Swedish Heroes

Idea and solution: flaviu2001

Hint
Sneaky corner case
Solution
Proof for the pattern

You can also see the video solutions on stefdasca's Youtube channel

#### History

Revisions

Rev. Lang. By When Δ Comment
en14 stefdasca 2020-10-18 14:07:27 163
en13 flaviu2001 2020-10-18 14:05:36 0 (published)
en12 flaviu2001 2020-10-18 14:05:15 379
en11 stefdasca 2020-10-17 19:41:06 703 Tiny change: '$)) =$a$\oplus$b$:)\n<' -> '$)) = $a$ $\oplus$ $b$ :)\n<'
en10 flaviu2001 2020-10-17 17:56:25 19
en9 flaviu2001 2020-10-17 17:54:50 1131
en8 flaviu2001 2020-10-17 17:43:18 2233
en7 flaviu2001 2020-10-17 02:38:44 10
en6 flaviu2001 2020-10-17 02:37:51 314
en5 flaviu2001 2020-10-17 02:14:39 1205
en4 flaviu2001 2020-10-17 01:46:17 1
en3 flaviu2001 2020-10-17 01:45:44 828 Tiny change: 'printing\nR n-1\nL n\nL 2\nworks!\n' -> 'printing\n\nR n-1\n\nL n\n\nL 2\n\nworks!\n'
en2 flaviu2001 2020-10-17 01:35:19 782
en1 flaviu2001 2020-10-17 01:27:41 702 Initial revision (saved to drafts)