Solutions are presented as using the least memory and the fastest execution time. It also takes the top 10 most recent solutions from each language. If you want to limit to a specific index, click the "Solved" button and go to that problem.
ContestId |
Name |
Phase |
Frozen |
Duration (Seconds) |
Relative Time |
Start Time |
|---|---|---|---|---|---|---|
| 2195 | Codeforces Round 1080 (Div. 3) | FINISHED | False | 9000 | 5238923 | Feb. 15, 2026, 2:45 p.m. |
Solved |
Index |
Name |
Type |
Tags |
Community Tag |
Rating |
|---|---|---|---|---|---|---|
| ( 24398 ) | B | Heapify 1 | PROGRAMMING | implementation |
You are given a permutation (a) of length (n)(^{\text{∗}}). You can perform the following operation any number of times (possibly zero): Select an index (i) ((1 \le i \le \frac{n}{2})), and swap (a_i) and (a_{2i}). For example, when (a=1,4,2,3,5), you can swap (a_2) and (a_4) to make it (1,3,2,4,5), but you cannot swap (a_2) and (a_3). Please determine if the sequence (a) can be sorted in increasing order. (^{\text{∗}})A permutation of length (n) is an array consisting of (n) distinct integers from (1) to (n) in arbitrary order. For example, (2,3,1,5,4) is a permutation, but (1,2,2) is not a permutation ((2) appears twice in the array), and (1,3,4) is also not a permutation ((n=3) but there is (4) in the array). Each test contains multiple test cases. The first line contains the number of test cases (t) ((1 \le t \le 10^4)). The description of the test cases follows. The first line of each test case contains a single integer (n) ((1 \le n \le 2 \cdot 10^5)). The second line of each test case contains (n) distinct integers (a_1,a_2,\ldots,a_n) ((1 \le a_i \le n)). It is guaranteed that the sum of (n) over all test cases does not exceed (2 \cdot 10^5). If (a) can be sorted in increasing order, output " YES " on a separate line. Otherwise, output " NO " on a separate line. You can output the answer in any case. For example, the strings " yEs ", " yes ", and " Yes " will also be recognized as positive responses. In the first test case, (a) is (1,4,3,2,5). You can sort (a) in increasing order by swapping (a_2) and (a_4). Therefore, the answer is " YES ". In the second test case, (a) is (1,4,2,3,5). It is impossible to sort (a) in increasing order. Therefore, the answer is " NO ". |
| Codeforces Round 1080 (Div. 3) Editorial |
Submission Id |
Author(s) |
Index |
Submitted |
Verdict |
Language |
Test Set |
Tests Passed |
Time taken (ms) |
Memory Consumed (bytes) |
Tags |
Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 363185877 | dsasdsaa | B | Feb. 15, 2026, 5:02 p.m. | OK | C# 10 | TESTS | 5 | 62 | 12492800 | ||
| 363201948 | sumitmondal2003 | B | Feb. 15, 2026, 6:27 p.m. | OK | C# 13 | TESTS | 5 | 93 | 34508800 | ||
| 363239976 | ZynImran | B | Feb. 16, 2026, 6:03 a.m. | OK | C++17 (GCC 7-32) | TESTS | 5 | 46 | 0 | ||
| 363239310 | Zeta_Slayer | B | Feb. 16, 2026, 5:53 a.m. | OK | C++17 (GCC 7-32) | TESTS | 5 | 46 | 0 | ||
| 363237833 | A_P_17_s | B | Feb. 16, 2026, 5:32 a.m. | OK | C++17 (GCC 7-32) | TESTS | 5 | 46 | 0 | ||
| 363235055 | selfjaraut | B | Feb. 16, 2026, 4:53 a.m. | OK | C++17 (GCC 7-32) | TESTS | 5 | 46 | 0 | ||
| 363233520 | Forest5326 | B | Feb. 16, 2026, 4:32 a.m. | OK | C++17 (GCC 7-32) | TESTS | 5 | 46 | 0 | ||
| 363233509 | imtiazfarhad12345 | B | Feb. 16, 2026, 4:31 a.m. | OK | C++17 (GCC 7-32) | TESTS | 5 | 46 | 0 | ||
| 363229086 | AdarshIITBHU | B | Feb. 16, 2026, 3:02 a.m. | OK | C++17 (GCC 7-32) | TESTS | 5 | 46 | 0 | ||
| 363224939 | ashikullah | B | Feb. 16, 2026, 1:02 a.m. | OK | C++17 (GCC 7-32) | TESTS | 5 | 46 | 0 | ||
| 363224919 | SergiiGolovko | B | Feb. 16, 2026, 1:01 a.m. | OK | C++17 (GCC 7-32) | TESTS | 5 | 46 | 0 | ||
| 363224180 | qccpc | B | Feb. 16, 2026, 12:34 a.m. | OK | C++17 (GCC 7-32) | TESTS | 5 | 46 | 0 | ||
| 363223456 | Mirror1001 | B | Feb. 16, 2026, 12:17 a.m. | OK | C++20 (GCC 13-64) | TESTS | 5 | 31 | 0 | ||
| 363193325 | Veloci_Raptor | B | Feb. 15, 2026, 5:26 p.m. | OK | C++20 (GCC 13-64) | TESTS | 5 | 31 | 102400 | ||
| 363231897 | NS_navneet_001 | B | Feb. 16, 2026, 4:02 a.m. | OK | C++20 (GCC 13-64) | TESTS | 5 | 46 | 0 | ||
| 363231790 | the_iitianmaverick | B | Feb. 16, 2026, 4 a.m. | OK | C++20 (GCC 13-64) | TESTS | 5 | 46 | 0 | ||
| 363226720 | porzlck | B | Feb. 16, 2026, 2:04 a.m. | OK | C++20 (GCC 13-64) | TESTS | 5 | 46 | 0 | ||
| 363214874 | kartiksingh3285 | B | Feb. 15, 2026, 8:47 p.m. | OK | C++20 (GCC 13-64) | TESTS | 5 | 46 | 0 | ||
| 363212819 | arshjeet | B | Feb. 15, 2026, 8:25 p.m. | OK | C++20 (GCC 13-64) | TESTS | 5 | 46 | 0 | ||
| 363212273 | dextrox1608 | B | Feb. 15, 2026, 8:18 p.m. | OK | C++20 (GCC 13-64) | TESTS | 5 | 46 | 0 | ||
| 363211792 | Demigod07 | B | Feb. 15, 2026, 8:12 p.m. | OK | C++20 (GCC 13-64) | TESTS | 5 | 46 | 0 | ||
| 363210621 | _sergio_ | B | Feb. 15, 2026, 8 p.m. | OK | C++20 (GCC 13-64) | TESTS | 5 | 46 | 0 | ||
| 363222922 | Shiva_Reddy_54 | B | Feb. 15, 2026, 11:58 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 5 | 31 | 0 | ||
| 363207618 | Avaya_09 | B | Feb. 15, 2026, 7:23 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 5 | 31 | 0 | ||
| 363197703 | sadmansafinneloy678 | B | Feb. 15, 2026, 5:55 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 5 | 31 | 0 | ||
| 363189013 | ThEntity | B | Feb. 15, 2026, 5:10 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 5 | 31 | 0 | ||
| 363184796 | Daniil41 | B | Feb. 15, 2026, 5 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 5 | 31 | 0 | ||
| 363216279 | vikas_kumar_01 | B | Feb. 15, 2026, 9:10 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 5 | 31 | 102400 | ||
| 363230474 | sun2snow | B | Feb. 16, 2026, 3:33 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 5 | 31 | 65228800 | ||
| 363240173 | zoroooo | B | Feb. 16, 2026, 6:05 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 5 | 46 | 0 | ||
| 363239209 | mere_papa | B | Feb. 16, 2026, 5:52 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 5 | 46 | 0 | ||
| 363238822 | _Mr_Afifi | B | Feb. 16, 2026, 5:47 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 5 | 46 | 0 | ||
| 363186739 | Atromitos | B | Feb. 15, 2026, 5:04 p.m. | OK | GNU C11 | TESTS | 5 | 46 | 716800 | ||
| 363233261 | Shashidhar.j | B | Feb. 16, 2026, 4:27 a.m. | OK | GNU C11 | TESTS | 5 | 62 | 716800 | ||
| 363231075 | Shashi14708 | B | Feb. 16, 2026, 3:45 a.m. | OK | GNU C11 | TESTS | 5 | 62 | 819200 | ||
| 363184202 | Atromitos | B | Feb. 15, 2026, 4:58 p.m. | OK | GNU C11 | TESTS | 5 | 62 | 819200 | ||
| 363190241 | abhishek_09f | B | Feb. 15, 2026, 5:12 p.m. | OK | GNU C11 | TESTS | 5 | 62 | 1536000 | ||
| 363187147 | piggy_poopa | B | Feb. 15, 2026, 5:05 p.m. | OK | GNU C11 | TESTS | 5 | 78 | 614400 | ||
| 363186119 | CandyFloss | B | Feb. 15, 2026, 5:03 p.m. | OK | GNU C11 | TESTS | 5 | 78 | 819200 | ||
| 363190546 | RIGZ | B | Feb. 15, 2026, 5:13 p.m. | OK | GNU C11 | TESTS | 5 | 78 | 921600 | ||
| 363185903 | pixel8ed | B | Feb. 15, 2026, 5:02 p.m. | OK | GNU C11 | TESTS | 5 | 78 | 2457600 | ||
| 363208484 | Nafis24fuad | B | Feb. 15, 2026, 7:34 p.m. | OK | GNU C11 | TESTS | 5 | 93 | 819200 | ||
| 363238368 | EndlessZheng | B | Feb. 16, 2026, 5:40 a.m. | OK | Go | TESTS | 5 | 78 | 4505600 | ||
| 363231001 | HarhsSoni | B | Feb. 16, 2026, 3:44 a.m. | OK | Java 21 | TESTS | 5 | 187 | 409600 | ||
| 363220606 | jade_rabbit01 | B | Feb. 15, 2026, 10:39 p.m. | OK | Java 21 | TESTS | 5 | 187 | 819200 | ||
| 363204851 | hg_2005 | B | Feb. 15, 2026, 6:54 p.m. | OK | Java 21 | TESTS | 5 | 203 | 614400 | ||
| 363202618 | vin_contra | B | Feb. 15, 2026, 6:33 p.m. | OK | Java 21 | TESTS | 5 | 218 | 614400 | ||
| 363213323 | I_AM_SPEED | B | Feb. 15, 2026, 8:30 p.m. | OK | Java 21 | TESTS | 5 | 218 | 10035200 | ||
| 363238179 | vineetiwari | B | Feb. 16, 2026, 5:38 a.m. | OK | Java 21 | TESTS | 5 | 234 | 819200 | ||
| 363205614 | balvantchaudhary | B | Feb. 15, 2026, 7:02 p.m. | OK | Java 21 | TESTS | 5 | 234 | 1331200 | ||
| 363191128 | sumanmaharana5555 | B | Feb. 15, 2026, 5:14 p.m. | OK | Java 21 | TESTS | 5 | 234 | 9011200 | ||
| 363201742 | sulabhambule | B | Feb. 15, 2026, 6:26 p.m. | OK | Java 21 | TESTS | 5 | 250 | 204800 | ||
| 363224852 | Ningzhuo | B | Feb. 16, 2026, 12:59 a.m. | OK | Java 21 | TESTS | 5 | 250 | 307200 | ||
| 363234682 | Chiffin | B | Feb. 16, 2026, 4:47 a.m. | OK | Java 8 | TESTS | 5 | 140 | 2969600 | ||
| 363237515 | abdmas | B | Feb. 16, 2026, 5:28 a.m. | OK | Java 8 | TESTS | 5 | 140 | 3686400 | ||
| 363187650 | Dharsh0507 | B | Feb. 15, 2026, 5:06 p.m. | OK | Java 8 | TESTS | 5 | 187 | 409600 | ||
| 363231522 | ashishprajapat | B | Feb. 16, 2026, 3:54 a.m. | OK | Java 8 | TESTS | 5 | 312 | 0 | ||
| 363190409 | siddharth_singh_0_7 | B | Feb. 15, 2026, 5:13 p.m. | OK | Java 8 | TESTS | 5 | 312 | 0 | ||
| 363200763 | hey_prateek__ | B | Feb. 15, 2026, 6:18 p.m. | OK | Java 8 | TESTS | 5 | 328 | 0 | ||
| 363230772 | ashishprajapat | B | Feb. 16, 2026, 3:39 a.m. | OK | Java 8 | TESTS | 5 | 343 | 0 | ||
| 363226031 | NeelmaniPandey09 | B | Feb. 16, 2026, 1:40 a.m. | OK | Java 8 | TESTS | 5 | 343 | 0 | ||
| 363188074 | Prakhya_Chaturvedi | B | Feb. 15, 2026, 5:07 p.m. | OK | Java 8 | TESTS | 5 | 343 | 0 | ||
| 363187702 | PranjaySrivastava | B | Feb. 15, 2026, 5:06 p.m. | OK | Java 8 | TESTS | 5 | 343 | 0 | ||
| 363196649 | gerogeVT | B | Feb. 15, 2026, 5:47 p.m. | OK | Kotlin 2.2 | TESTS | 5 | 281 | 10956800 | ||
| 363209140 | mazaryan | B | Feb. 15, 2026, 7:42 p.m. | OK | PyPy 3 | TESTS | 5 | 187 | 13107200 | ||
| 363194279 | rabeysin | B | Feb. 15, 2026, 5:32 p.m. | OK | PyPy 3 | TESTS | 5 | 250 | 13414400 | ||
| 363233871 | ramni9 | B | Feb. 16, 2026, 4:36 a.m. | OK | PyPy 3 | TESTS | 5 | 296 | 13107200 | ||
| 363189192 | lightningskipper | B | Feb. 15, 2026, 5:10 p.m. | OK | PyPy 3 | TESTS | 5 | 312 | 12595200 | ||
| 363225357 | Sheikah | B | Feb. 16, 2026, 1:16 a.m. | OK | PyPy 3-64 | TESTS | 5 | 78 | 20582400 | ||
| 363209775 | lattermatter | B | Feb. 15, 2026, 7:50 p.m. | OK | PyPy 3-64 | TESTS | 5 | 93 | 17408000 | ||
| 363208145 | flamingdot | B | Feb. 15, 2026, 7:30 p.m. | OK | PyPy 3-64 | TESTS | 5 | 93 | 18227200 | ||
| 363207470 | flamingdot | B | Feb. 15, 2026, 7:22 p.m. | OK | PyPy 3-64 | TESTS | 5 | 93 | 18227200 | ||
| 363203839 | flamingdot | B | Feb. 15, 2026, 6:43 p.m. | OK | PyPy 3-64 | TESTS | 5 | 93 | 18227200 | ||
| 363219951 | weii2000 | B | Feb. 15, 2026, 10:23 p.m. | OK | PyPy 3-64 | TESTS | 5 | 93 | 18841600 | ||
| 363198573 | U.. | B | Feb. 15, 2026, 6:01 p.m. | OK | PyPy 3-64 | TESTS | 5 | 93 | 19148800 | ||
| 363189432 | gun7ya | B | Feb. 15, 2026, 5:11 p.m. | OK | PyPy 3-64 | TESTS | 5 | 93 | 20787200 | ||
| 363205851 | gardengnome | B | Feb. 15, 2026, 7:04 p.m. | OK | PyPy 3-64 | TESTS | 5 | 109 | 20684800 | ||
| 363231857 | pulakbagaria | B | Feb. 16, 2026, 4:01 a.m. | OK | PyPy 3-64 | TESTS | 5 | 109 | 20889600 | ||
| 363184366 | alok_chandra01 | B | Feb. 15, 2026, 4:59 p.m. | OK | Python 3 | TESTS | 5 | 109 | 13312000 | ||
| 363222882 | eugalt | B | Feb. 15, 2026, 11:56 p.m. | OK | Python 3 | TESTS | 5 | 109 | 14950400 | ||
| 363223116 | eugalt | B | Feb. 16, 2026, 12:05 a.m. | OK | Python 3 | TESTS | 5 | 125 | 14950400 | ||
| 363204512 | BenignSaw | B | Feb. 15, 2026, 6:51 p.m. | OK | Python 3 | TESTS | 5 | 125 | 15769600 | ||
| 363201432 | BenignSaw | B | Feb. 15, 2026, 6:23 p.m. | OK | Python 3 | TESTS | 5 | 125 | 21094400 | ||
| 363187204 | devkeshwani | B | Feb. 15, 2026, 5:05 p.m. | OK | Python 3 | TESTS | 5 | 125 | 24576000 | ||
| 363189015 | pavanprasad700 | B | Feb. 15, 2026, 5:10 p.m. | OK | Python 3 | TESTS | 5 | 140 | 15155200 | ||
| 363203015 | amod_24 | B | Feb. 15, 2026, 6:36 p.m. | OK | Python 3 | TESTS | 5 | 140 | 20684800 | ||
| 363200305 | BenignSaw | B | Feb. 15, 2026, 6:14 p.m. | OK | Python 3 | TESTS | 5 | 140 | 22016000 | ||
| 363222809 | eugalt | B | Feb. 15, 2026, 11:52 p.m. | OK | Python 3 | TESTS | 5 | 156 | 14950400 | ||
| 363215457 | emoreira | B | Feb. 15, 2026, 8:56 p.m. | OK | Rust 2024 | TESTS | 5 | 31 | 204800 | ||
| 363197970 | patacca | B | Feb. 15, 2026, 5:56 p.m. | OK | Rust 2024 | TESTS | 5 | 46 | 204800 | ||
| 363235020 | vanshit | B | Feb. 16, 2026, 4:52 a.m. | OK | Rust 2024 | TESTS | 5 | 46 | 11776000 | ||
| 363199698 | CoHHa9_MyXa | B | Feb. 15, 2026, 6:09 p.m. | OK | Rust 2024 | TESTS | 5 | 62 | 11161600 |
Back to search problems