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Codeforces Round #804 (Div. 2) Editorial reupload
B — Almost Ternary Matrix
Author: Gheal
Solution
The general construction consists of a $$$2 \times 2$$$ checkerboard with a $$$1$$$-thick border. Here is the intended solution for $$$n=6$$$ and $$$m=8$$$:
https://codeforces.me/predownloaded/75/c4/75c46e19cc3cf6f890139b0e74774c3a6fc387db.png
Time complexity per testcase: $$$O(nm)$$$.
| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en42 |
|
tibinyte | 2022-11-06 21:29:15 | 0 | (published) | |
| en41 |
|
tibinyte | 2022-11-06 19:15:16 | 0 | (saved to drafts) | |
| en40 |
|
Gheal | 2022-10-31 22:14:25 | 0 | (published) | |
| en39 |
|
Gheal | 2022-10-31 22:12:04 | 16 | ||
| en38 |
|
Gheal | 2022-10-31 22:11:13 | 13 | Tiny change: 'er authors of round 804. We are v' -> 'er authors. We are v' | |
| en37 |
|
Gheal | 2022-10-31 22:10:53 | 211 | ||
| en36 |
|
Gheal | 2022-10-31 22:04:25 | 26 | ||
| en35 |
|
Gheal | 2022-10-31 22:03:40 | 39 | ||
| en34 |
|
Gheal | 2022-10-31 22:01:52 | 74 | ||
| en33 |
|
Gheal | 2022-10-31 21:57:17 | 200 | ||
| en32 |
|
Gheal | 2022-10-31 21:57:01 | 747 | ||
| en31 |
|
Gheal | 2022-10-31 21:48:53 | 629 | ||
| en30 |
|
tibinyte | 2022-10-31 21:41:38 | 7 | ||
| en29 |
|
tibinyte | 2022-10-31 21:41:03 | 38 | ||
| en28 |
|
Gheal | 2022-10-31 21:38:59 | 40 | ||
| en27 |
|
tibinyte | 2022-10-31 21:37:09 | 17 | ||
| en26 |
|
Gheal | 2022-10-31 21:34:15 | 81 | ||
| en25 |
|
Gheal | 2022-10-31 21:33:19 | 2311 | ||
| en24 |
|
tibinyte | 2022-10-31 21:33:02 | 34 | ||
| en23 |
|
tibinyte | 2022-10-31 21:32:50 | 340 | ||
| en22 |
|
tibinyte | 2022-10-31 21:31:52 | 3999 | ||
| en21 |
|
tibinyte | 2022-10-31 21:29:21 | 303 | ||
| en20 |
|
tibinyte | 2022-10-31 21:29:00 | 18 | Tiny change: 'anks to \ncadmiumky\n ):\n\nT' -> 'anks to \n[user:cadmiumky]\n ):\n\nT' | |
| en19 |
|
tibinyte | 2022-10-31 21:28:31 | 4797 | ||
| en18 |
|
Gheal | 2022-10-31 21:27:42 | 924 | ||
| en17 |
|
Gheal | 2022-10-31 21:18:46 | 409 | ||
| en16 |
|
Gheal | 2022-10-31 21:16:45 | 519 | ||
| en15 |
|
Gheal | 2022-10-31 21:13:59 | 46 | ||
| en14 |
|
Gheal | 2022-10-31 21:12:58 | 48 | ||
| en13 |
|
Gheal | 2022-10-31 21:11:37 | 1405 | ||
| en12 |
|
tibinyte | 2022-10-31 00:18:26 | 7 | ||
| en11 |
|
tibinyte | 2022-10-31 00:18:18 | 79 | ||
| en10 |
|
tibinyte | 2022-10-31 00:18:10 | 73 | ||
| en9 |
|
tibinyte | 2022-10-31 00:18:00 | 3259 | ||
| en8 |
|
tibinyte | 2022-10-31 00:16:45 | 3531 | ||
| en7 |
|
tibinyte | 2022-10-31 00:15:55 | 2754 | ||
| en6 |
|
tibinyte | 2022-10-31 00:15:29 | 2047 | ||
| en5 |
|
tibinyte | 2022-10-31 00:14:20 | 1085 | ||
| en4 |
|
tibinyte | 2022-10-31 00:12:33 | 2468 | ||
| en3 |
|
tibinyte | 2022-10-31 00:08:20 | 10 | ||
| en2 |
|
tibinyte | 2022-10-31 00:07:58 | 2606 | ||
| en1 |
|
Gheal | 2022-10-30 23:34:08 | 50 | Initial revision (saved to drafts) |
