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ContestId |
Name |
Phase |
Frozen |
Duration (Seconds) |
Relative Time |
Start Time |
|---|---|---|---|---|---|---|
| 2171 | Codeforces Round 1065 (Div. 3) | FINISHED | False | 9000 | 12756323 | Nov. 20, 2025, 2:35 p.m. |
Solved |
Index |
Name |
Type |
Tags |
Community Tag |
Rating |
|---|---|---|---|---|---|---|
| ( 3605 ) | E | Anisphia Wynn Palettia and Good Permutations | PROGRAMMING | constructive algorithms greedy number theory |
Anis and her new assistant Euphie are improving the Witch's Broom! Magicology requires great precision and care — in order to fly, the construction of the broom must have sufficiently few imperfections. For an arbitrary array (a) of length (m), call an index (i) ((1\leq i\leq m-2)) bad if (a_i), (a_{i+1}), and (a_{i+2}) are all pairwise coprime. More formally, (i) is a bad index if and only if (\gcd(a_i, a_{i+1}) = \gcd(a_i, a_{i+2}) = \gcd(a_{i+1}, a_{i+2}) = 1)(^{\text{∗}}). Furthermore, call (a) good if it has at most (6) bad indices. You are given an integer (n). Construct a good permutation(^{\text{†}}) (p) of length (n). It can be shown that such a permutation always exists. Note that you do not have to minimize the number of bad indices. (^{\text{∗}})(\gcd(x, y)) denotes the greatest common divisor of (x) and (y) (^{\text{†}}) A permutation of length (n) is an array that contains every integer from (1) to (n) exactly once, in any order. The first line contains a single integer (t) ((1 \leq t \leq 10^4)) — the number of test cases. The only line of each test case contains a single integer (n) ((3\leq n \leq 2\cdot 10^5)). It is guaranteed that the sum of (n) over all test cases does not exceed (2\cdot 10^5). For each test case, output on a single line (n) integers (p_1, p_2, \dots, p_n), an example of a good permutation of length (n). If there are multiple good permutations, you may output any of them. For (n=9), we have (i) (p_i) (p_{i+1}) (p_{i+2}) (\gcd(p_i, p_{i+1})) (\gcd(p_i, p_{i+2})) (\gcd(p_{i+1}, p_{i+2})) (1) (5) (4) (8) (1) (1) (4) (2) (4) (8) (1) (4) (1) (1) (3) (8) (1) (9) (1) (1) (1) (4) (1) (9) (3) (1) (1) (3) (5) (9) (3) (6) (3) (3) $$$3$$ |
| Codeforces Round 1065 (Div. 3) Editorial |
Submission Id |
Author(s) |
Index |
Submitted |
Verdict |
Language |
Test Set |
Tests Passed |
Time taken (ms) |
Memory Consumed (bytes) |
Tags |
Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 350004420 | Neron | E | Nov. 21, 2025, 12:26 a.m. | OK | C# 13 | TESTS | 20 | 374 | 5222400 | ||
| 350148227 | bro_wtf | E | Nov. 22, 2025, 4:47 a.m. | OK | C++17 (GCC 7-32) | TESTS | 20 | 62 | 0 | ||
| 350133607 | CJor_feg | E | Nov. 21, 2025, 11:08 p.m. | OK | C++17 (GCC 7-32) | TESTS | 20 | 62 | 0 | ||
| 350054549 | lesnik496 | E | Nov. 21, 2025, 11:09 a.m. | OK | C++17 (GCC 7-32) | TESTS | 20 | 62 | 0 | ||
| 350015331 | duka100 | E | Nov. 21, 2025, 3:59 a.m. | OK | C++17 (GCC 7-32) | TESTS | 20 | 62 | 0 | ||
| 350004355 | 1v9fiora | E | Nov. 21, 2025, 12:24 a.m. | OK | C++17 (GCC 7-32) | TESTS | 20 | 62 | 0 | ||
| 350016948 | ankitsingh1221 | E | Nov. 21, 2025, 4:28 a.m. | OK | C++17 (GCC 7-32) | TESTS | 20 | 62 | 3174400 | ||
| 350149214 | qaquwub | E | Nov. 22, 2025, 5:02 a.m. | OK | C++17 (GCC 7-32) | TESTS | 20 | 77 | 0 | ||
| 350147729 | hs.xx | E | Nov. 22, 2025, 4:40 a.m. | OK | C++17 (GCC 7-32) | TESTS | 20 | 77 | 0 | ||
| 350142220 | dzl049 | E | Nov. 22, 2025, 2:57 a.m. | OK | C++17 (GCC 7-32) | TESTS | 20 | 77 | 0 | ||
| 350138171 | ItzsleepyXD | E | Nov. 22, 2025, 1:29 a.m. | OK | C++17 (GCC 7-32) | TESTS | 20 | 77 | 0 | ||
| 350136913 | Mantlemoose | E | Nov. 22, 2025, 12:57 a.m. | OK | C++20 (GCC 13-64) | TESTS | 20 | 61 | 0 | ||
| 350018406 | Warinchai_s | E | Nov. 21, 2025, 4:54 a.m. | OK | C++20 (GCC 13-64) | TESTS | 20 | 61 | 0 | ||
| 350015432 | Jache | E | Nov. 21, 2025, 4 a.m. | OK | C++20 (GCC 13-64) | TESTS | 20 | 61 | 0 | ||
| 350006168 | Muschuang123 | E | Nov. 21, 2025, 1:13 a.m. | OK | C++20 (GCC 13-64) | TESTS | 20 | 61 | 0 | ||
| 350154210 | fizaaaaaaaa | E | Nov. 22, 2025, 6:05 a.m. | OK | C++20 (GCC 13-64) | TESTS | 20 | 62 | 0 | ||
| 350153986 | fizaaaaaaaa | E | Nov. 22, 2025, 6:03 a.m. | OK | C++20 (GCC 13-64) | TESTS | 20 | 62 | 0 | ||
| 350150780 | yuanmouren | E | Nov. 22, 2025, 5:24 a.m. | OK | C++20 (GCC 13-64) | TESTS | 20 | 62 | 0 | ||
| 350136812 | Geothermal | E | Nov. 22, 2025, 12:54 a.m. | OK | C++20 (GCC 13-64) | TESTS | 20 | 62 | 0 | ||
| 350115007 | christopherbitti9 | E | Nov. 21, 2025, 6:52 p.m. | OK | C++20 (GCC 13-64) | TESTS | 20 | 62 | 0 | ||
| 350103483 | VasuBhakt | E | Nov. 21, 2025, 5:20 p.m. | OK | C++20 (GCC 13-64) | TESTS | 20 | 62 | 0 | ||
| 350144987 | Orz12345 | E | Nov. 22, 2025, 3:51 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 20 | 61 | 0 | ||
| 350011784 | CNDYD | E | Nov. 21, 2025, 3:03 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 20 | 61 | 102400 | ||
| 350152050 | NQBH | E | Nov. 22, 2025, 5:40 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 20 | 62 | 0 | ||
| 350146536 | wtwt0101 | E | Nov. 22, 2025, 4:19 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 20 | 62 | 0 | ||
| 350142603 | Tang888 | E | Nov. 22, 2025, 3:05 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 20 | 62 | 0 | ||
| 350138441 | Continue90666 | E | Nov. 22, 2025, 1:36 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 20 | 62 | 0 | ||
| 350138201 | Bramer_x | E | Nov. 22, 2025, 1:30 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 20 | 62 | 0 | ||
| 350134119 | sccccc | E | Nov. 21, 2025, 11:24 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 20 | 62 | 0 | ||
| 350106537 | Abhinav___1024 | E | Nov. 21, 2025, 5:44 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 20 | 62 | 0 | ||
| 350105797 | Starrism0203 | E | Nov. 21, 2025, 5:38 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 20 | 62 | 0 | ||
| 350035278 | gxlois | E | Nov. 21, 2025, 8:28 a.m. | OK | D | TESTS | 20 | 187 | 2764800 | ||
| 350008295 | ruban | E | Nov. 21, 2025, 2 a.m. | OK | FPC | TESTS | 20 | 296 | 70041600 | ||
| 350014974 | MainAgain | E | Nov. 21, 2025, 3:53 a.m. | OK | Go | TESTS | 20 | 62 | 6451200 | ||
| 350015866 | uffhottie | E | Nov. 21, 2025, 4:09 a.m. | OK | Go | TESTS | 20 | 108 | 7065600 | ||
| 350035200 | owi8270 | E | Nov. 21, 2025, 8:27 a.m. | OK | Go | TESTS | 20 | 124 | 9932800 | ||
| 350129880 | Spencer1s | E | Nov. 21, 2025, 9:41 p.m. | OK | Java 21 | TESTS | 20 | 312 | 2048000 | ||
| 350016431 | code.breaker23 | E | Nov. 21, 2025, 4:19 a.m. | OK | Java 21 | TESTS | 20 | 327 | 2150400 | ||
| 350058921 | Balu2907 | E | Nov. 21, 2025, 11:45 a.m. | OK | Java 21 | TESTS | 20 | 343 | 1024000 | ||
| 350083312 | vineetiwari | E | Nov. 21, 2025, 2:51 p.m. | OK | Java 21 | TESTS | 20 | 389 | 13619200 | ||
| 350034792 | arthkj0911 | E | Nov. 21, 2025, 8:23 a.m. | OK | Java 21 | TESTS | 20 | 405 | 3174400 | ||
| 350018660 | rutul21 | E | Nov. 21, 2025, 4:59 a.m. | OK | Java 21 | TESTS | 20 | 687 | 6144000 | ||
| 350004872 | dzhi | E | Nov. 21, 2025, 12:40 a.m. | OK | Java 21 | TESTS | 20 | 765 | 41779200 | ||
| 350151162 | pri_singh | E | Nov. 22, 2025, 5:29 a.m. | OK | Java 21 | TESTS | 20 | 1484 | 716800 | ||
| 350115220 | ronwonwon | E | Nov. 21, 2025, 6:55 p.m. | OK | Java 8 | TESTS | 20 | 280 | 3686400 | ||
| 350011110 | xmjlove | E | Nov. 21, 2025, 2:52 a.m. | OK | Java 8 | TESTS | 20 | 296 | 4198400 | ||
| 350051137 | kevin_0911 | E | Nov. 21, 2025, 10:38 a.m. | OK | Java 8 | TESTS | 20 | 514 | 0 | ||
| 350116389 | testtest111ksjfrdvn | E | Nov. 21, 2025, 7:05 p.m. | OK | Java 8 | TESTS | 20 | 640 | 32358400 | ||
| 350082653 | SoleProprietor | E | Nov. 21, 2025, 2:47 p.m. | OK | PyPy 3-64 | TESTS | 20 | 140 | 14233600 | ||
| 350036969 | clonecuantan | E | Nov. 21, 2025, 8:42 a.m. | OK | PyPy 3-64 | TESTS | 20 | 140 | 17817600 | ||
| 350016723 | MinValgen | E | Nov. 21, 2025, 4:24 a.m. | OK | PyPy 3-64 | TESTS | 20 | 155 | 15462400 | ||
| 350004463 | eugenekoran | E | Nov. 21, 2025, 12:27 a.m. | OK | PyPy 3-64 | TESTS | 20 | 156 | 16896000 | ||
| 349991627 | RanjanV_1 | E | Nov. 20, 2025, 8:06 p.m. | OK | PyPy 3-64 | TESTS | 20 | 171 | 15360000 | ||
| 350057178 | ibraheemkureshi | E | Nov. 21, 2025, 11:32 a.m. | OK | PyPy 3-64 | TESTS | 20 | 171 | 18227200 | ||
| 350062110 | youngdp | E | Nov. 21, 2025, 12:10 p.m. | OK | PyPy 3-64 | TESTS | 20 | 186 | 15872000 | ||
| 349993789 | RobinFromTheHood | E | Nov. 20, 2025, 8:33 p.m. | OK | PyPy 3-64 | TESTS | 20 | 186 | 15974400 | ||
| 350034057 | smilences | E | Nov. 21, 2025, 8:17 a.m. | OK | PyPy 3-64 | TESTS | 20 | 187 | 17510400 | ||
| 350040459 | Aravind | E | Nov. 21, 2025, 9:10 a.m. | OK | PyPy 3-64 | TESTS | 20 | 187 | 18022400 | ||
| 350099199 | 3star | E | Nov. 21, 2025, 4:45 p.m. | OK | Python 3 | TESTS | 20 | 265 | 12697600 | ||
| 350036618 | eshanahmed108 | E | Nov. 21, 2025, 8:39 a.m. | OK | Python 3 | TESTS | 20 | 358 | 14438400 | ||
| 350040193 | skyoceanland | E | Nov. 21, 2025, 9:08 a.m. | OK | Python 3 | TESTS | 20 | 359 | 12902400 | ||
| 350011967 | skyoceanland | E | Nov. 21, 2025, 3:06 a.m. | OK | Python 3 | TESTS | 20 | 374 | 16179200 | ||
| 350011171 | skyoceanland | E | Nov. 21, 2025, 2:53 a.m. | OK | Python 3 | TESTS | 20 | 390 | 16179200 | ||
| 350062545 | NagisaF | E | Nov. 21, 2025, 12:13 p.m. | OK | Rust 2021 | TESTS | 20 | 77 | 0 | ||
| 350062214 | macaroni5708 | E | Nov. 21, 2025, 12:11 p.m. | OK | Rust 2024 | TESTS | 20 | 77 | 0 | ||
| 350125236 | Monster027 | E | Nov. 21, 2025, 8:31 p.m. | OK | Rust 2024 | TESTS | 20 | 77 | 1536000 | ||
| 350062822 | macaroni5708 | E | Nov. 21, 2025, 12:16 p.m. | OK | Rust 2024 | TESTS | 20 | 92 | 0 |
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