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ContestId |
Name |
Phase |
Frozen |
Duration (Seconds) |
Relative Time |
Start Time |
|---|---|---|---|---|---|---|
| 2117 | Codeforces Round 1029 (Div. 3) | FINISHED | False | 8100 | 27012323 | June 8, 2025, 2:35 p.m. |
Solved |
Index |
Name |
Type |
Tags |
Community Tag |
Rating |
|---|---|---|---|---|---|---|
| ( 21985 ) | D | Retaliation | PROGRAMMING | binary search math |
Yousef wants to explode an array (a_1, a_2, \dots, a_n). An array gets exploded when all of its elements become equal to zero. In one operation, Yousef can do exactly one of the following: For every index (i) in (a), decrease (a_i) by (i). For every index (i) in (a), decrease (a_i) by (n - i + 1). Your task is to help Yousef determine if it is possible to explode the array using any number of operations. The first line of the input contains an integer (t) ((1 \le t \le 10^4)) — the number of test cases. The first line of each test case contains an integer (n) ((2 \le n \le 2 \cdot 10^5)) — the size of the array. The second line of each test case contains (n) integers (a_1, a_2, \dots, a_n) ((1 \le a_i \le 10^9)) — the elements of the array. It is guaranteed that the sum of (n) over all test cases doesn't exceed (2 \cdot 10^5). For each test case, print " YES " if Yousef can explode the array, otherwise output " NO ". You can output the answer in any case (upper or lower). For example, the strings " yEs ", " yes ", " Yes ", and " YES " will be recognized as positive responses. In the second test case, we can do the following: Perform (1) operation of the first type. The array becomes (20, 16, 12, 8, 4). Perform (4) operations of the second type. The array becomes (0, 0, 0, 0, 0). In the first, third, fourth, and sixth test cases, it can be proven that it is impossible to make all elements equal to zero using any number of operations. |
| Codeforces Round 1029 (Div. 3) Editorial |
Submission Id |
Author(s) |
Index |
Submitted |
Verdict |
Language |
Test Set |
Tests Passed |
Time taken (ms) |
Memory Consumed (bytes) |
Tags |
Rating |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 323639957 | IRacle | D | June 9, 2025, 1:25 p.m. | OK | C# 10 | TESTS | 12 | 124 | 17920000 | ||
| 323713462 | og.kostya | D | June 10, 2025, 5:12 a.m. | OK | C# 13 | TESTS | 12 | 124 | 1433600 | ||
| 323635872 | Kush_Likhdhari | D | June 9, 2025, 12:56 p.m. | OK | C++17 (GCC 7-32) | TESTS | 12 | 77 | 0 | ||
| 323714131 | ylh_ | D | June 10, 2025, 5:20 a.m. | OK | C++17 (GCC 7-32) | TESTS | 12 | 77 | 0 | ||
| 323682301 | waqar_ahmed_madni | D | June 9, 2025, 7:08 p.m. | OK | C++17 (GCC 7-32) | TESTS | 12 | 77 | 0 | ||
| 323656222 | PradyunT | D | June 9, 2025, 3:28 p.m. | OK | C++17 (GCC 7-32) | TESTS | 12 | 77 | 0 | ||
| 323647387 | darkDeveloper_228 | D | June 9, 2025, 2:20 p.m. | OK | C++17 (GCC 7-32) | TESTS | 12 | 77 | 102400 | ||
| 323626327 | ZUHAYER_ | D | June 9, 2025, 11:45 a.m. | OK | C++17 (GCC 7-32) | TESTS | 12 | 77 | 102400 | ||
| 323618731 | aryank07 | D | June 9, 2025, 10:47 a.m. | OK | C++17 (GCC 7-32) | TESTS | 12 | 78 | 0 | ||
| 323662867 | notmrabhi | D | June 9, 2025, 4:21 p.m. | OK | C++17 (GCC 7-32) | TESTS | 12 | 78 | 0 | ||
| 323619168 | morex3 | D | June 9, 2025, 10:50 a.m. | OK | C++17 (GCC 7-32) | TESTS | 12 | 78 | 0 | ||
| 323672687 | lahoax | D | June 9, 2025, 5:40 p.m. | OK | C++17 (GCC 7-32) | TESTS | 12 | 78 | 102400 | ||
| 323619699 | DuyAnhYeuPTIT | D | June 9, 2025, 10:54 a.m. | OK | C++20 (GCC 13-64) | TESTS | 12 | 62 | 102400 | ||
| 323586444 | One_Wan | D | June 9, 2025, 6:25 a.m. | OK | C++20 (GCC 13-64) | TESTS | 12 | 62 | 1740800 | ||
| 323671460 | Noob_er_Bacca | D | June 9, 2025, 5:29 p.m. | OK | C++20 (GCC 13-64) | TESTS | 12 | 77 | 0 | ||
| 323674869 | becastal | D | June 9, 2025, 5:58 p.m. | OK | C++20 (GCC 13-64) | TESTS | 12 | 77 | 0 | ||
| 323668386 | Kriith | D | June 9, 2025, 5:03 p.m. | OK | C++20 (GCC 13-64) | TESTS | 12 | 77 | 0 | ||
| 323665731 | MohmedGado_255 | D | June 9, 2025, 4:43 p.m. | OK | C++20 (GCC 13-64) | TESTS | 12 | 77 | 0 | ||
| 323664953 | The_Batman99 | D | June 9, 2025, 4:38 p.m. | OK | C++20 (GCC 13-64) | TESTS | 12 | 77 | 0 | ||
| 323655415 | 817 | D | June 9, 2025, 3:21 p.m. | OK | C++20 (GCC 13-64) | TESTS | 12 | 77 | 0 | ||
| 323645715 | CodeAlpha07 | D | June 9, 2025, 2:07 p.m. | OK | C++20 (GCC 13-64) | TESTS | 12 | 77 | 0 | ||
| 323645304 | cse | D | June 9, 2025, 2:04 p.m. | OK | C++20 (GCC 13-64) | TESTS | 12 | 77 | 0 | ||
| 323585375 | 20412014 | D | June 9, 2025, 6:14 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 12 | 62 | 0 | ||
| 323655045 | Subhodip_86 | D | June 9, 2025, 3:18 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 12 | 62 | 102400 | ||
| 323655013 | subho86 | D | June 9, 2025, 3:18 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 12 | 62 | 102400 | ||
| 323642877 | jjwawy999 | D | June 9, 2025, 1:46 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 12 | 62 | 102400 | ||
| 323627529 | aloocoder | D | June 9, 2025, 11:55 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 12 | 62 | 102400 | ||
| 323647560 | Antumbra01 | D | June 9, 2025, 2:21 p.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 12 | 62 | 3174400 | ||
| 323715418 | one_unknown | D | June 10, 2025, 5:35 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 12 | 77 | 0 | ||
| 323713728 | wthutsav | D | June 10, 2025, 5:16 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 12 | 77 | 0 | ||
| 323706481 | ys_26 | D | June 10, 2025, 3:40 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 12 | 77 | 0 | ||
| 323705696 | zombie627 | D | June 10, 2025, 3:27 a.m. | OK | C++23 (GCC 14-64, msys2) | TESTS | 12 | 77 | 0 | ||
| 323609897 | bluemegane | D | June 9, 2025, 9:43 a.m. | OK | C# 8 | TESTS | 12 | 171 | 16588800 | ||
| 323693619 | djad04 | D | June 9, 2025, 10:32 p.m. | OK | GNU C11 | TESTS | 12 | 93 | 819200 | ||
| 323644764 | ShauryaVats | D | June 9, 2025, 2:01 p.m. | OK | GNU C11 | TESTS | 12 | 109 | 819200 | ||
| 323686679 | Adamant18 | D | June 9, 2025, 8:06 p.m. | OK | GNU C11 | TESTS | 12 | 109 | 819200 | ||
| 323642364 | eatyumi | D | June 9, 2025, 1:42 p.m. | OK | GNU C11 | TESTS | 12 | 109 | 921600 | ||
| 323694136 | djad04 | D | June 9, 2025, 10:48 p.m. | OK | GNU C11 | TESTS | 12 | 109 | 921600 | ||
| 323651348 | shubhayandas2004 | D | June 9, 2025, 2:48 p.m. | OK | GNU C11 | TESTS | 12 | 109 | 1740800 | ||
| 323654172 | roy1012 | D | June 9, 2025, 3:11 p.m. | OK | GNU C11 | TESTS | 12 | 124 | 819200 | ||
| 323607183 | RachitSoni | D | June 9, 2025, 9:23 a.m. | OK | GNU C11 | TESTS | 12 | 124 | 819200 | ||
| 323641760 | eatyumi | D | June 9, 2025, 1:38 p.m. | OK | GNU C11 | TESTS | 12 | 139 | 921600 | ||
| 323675301 | abhi23100 | D | June 9, 2025, 6:01 p.m. | OK | GNU C11 | TESTS | 12 | 140 | 1843200 | ||
| 323620463 | HarhsSoni | D | June 9, 2025, 11 a.m. | OK | Java 21 | TESTS | 12 | 281 | 716800 | ||
| 323642750 | sahil_14 | D | June 9, 2025, 1:45 p.m. | OK | Java 21 | TESTS | 12 | 296 | 204800 | ||
| 323677330 | codes411 | D | June 9, 2025, 6:19 p.m. | OK | Java 21 | TESTS | 12 | 296 | 614400 | ||
| 323707615 | flicktoss | D | June 10, 2025, 3:56 a.m. | OK | Java 21 | TESTS | 12 | 296 | 1945600 | ||
| 323583095 | 2manas1 | D | June 9, 2025, 5:49 a.m. | OK | Java 21 | TESTS | 12 | 311 | 921600 | ||
| 323639501 | Pramod_Bhosale67 | D | June 9, 2025, 1:21 p.m. | OK | Java 21 | TESTS | 12 | 312 | 1331200 | ||
| 323658048 | WrongAnswerOnTestCase2 | D | June 9, 2025, 3:43 p.m. | OK | Java 21 | TESTS | 12 | 327 | 204800 | ||
| 323647170 | one_minus_one | D | June 9, 2025, 2:19 p.m. | OK | Java 21 | TESTS | 12 | 327 | 307200 | ||
| 323605118 | amit_roy | D | June 9, 2025, 9:10 a.m. | OK | Java 21 | TESTS | 12 | 327 | 307200 | ||
| 323605018 | priyaroy3370 | D | June 9, 2025, 9:09 a.m. | OK | Java 21 | TESTS | 12 | 327 | 614400 | ||
| 323688650 | Sumitsingh7 | D | June 9, 2025, 8:38 p.m. | OK | Java 8 | TESTS | 12 | 171 | 6860800 | ||
| 323687041 | satyams_9001 | D | June 9, 2025, 8:12 p.m. | OK | Java 8 | TESTS | 12 | 171 | 6860800 | ||
| 323638120 | NischayCodes | D | June 9, 2025, 1:12 p.m. | OK | Java 8 | TESTS | 12 | 218 | 3584000 | ||
| 323607214 | bhishma_v2 | D | June 9, 2025, 9:23 a.m. | OK | Java 8 | TESTS | 12 | 218 | 3891200 | ||
| 323654140 | AchalVishnoi | D | June 9, 2025, 3:11 p.m. | OK | Java 8 | TESTS | 12 | 467 | 0 | ||
| 323668891 | aviral20040 | D | June 9, 2025, 5:08 p.m. | OK | Java 8 | TESTS | 12 | 468 | 0 | ||
| 323637277 | jroy.karnati | D | June 9, 2025, 1:05 p.m. | OK | Java 8 | TESTS | 12 | 468 | 0 | ||
| 323627147 | sunil_singh | D | June 9, 2025, 11:52 a.m. | OK | Java 8 | TESTS | 12 | 468 | 0 | ||
| 323630455 | Divyanshu_Lila | D | June 9, 2025, 12:16 p.m. | OK | Java 8 | TESTS | 12 | 499 | 3481600 | ||
| 323634822 | Ishaan__23 | D | June 9, 2025, 12:48 p.m. | OK | Java 8 | TESTS | 12 | 515 | 0 | ||
| 323657352 | chinesedfan | D | June 9, 2025, 3:37 p.m. | OK | Node.js | TESTS | 12 | 171 | 29286400 | ||
| 323692693 | unknow754389 | D | June 9, 2025, 10:05 p.m. | OK | PyPy 3 | TESTS | 12 | 452 | 18124800 | ||
| 323679343 | sushmanth.dampur8780 | D | June 9, 2025, 6:36 p.m. | OK | PyPy 3-64 | TESTS | 12 | 139 | 27238400 | ||
| 323650632 | Sanoy-si | D | June 9, 2025, 2:43 p.m. | OK | PyPy 3-64 | TESTS | 12 | 140 | 26521600 | ||
| 323608391 | Manish_Jangir | D | June 9, 2025, 9:32 a.m. | OK | PyPy 3-64 | TESTS | 12 | 140 | 27136000 | ||
| 323604861 | Ihateyounow | D | June 9, 2025, 9:08 a.m. | OK | PyPy 3-64 | TESTS | 12 | 140 | 27136000 | ||
| 323674287 | Neem_Ko | D | June 9, 2025, 5:53 p.m. | OK | PyPy 3-64 | TESTS | 12 | 140 | 27238400 | ||
| 323679680 | smz.26 | D | June 9, 2025, 6:39 p.m. | OK | PyPy 3-64 | TESTS | 12 | 140 | 30412800 | ||
| 323662626 | swayampal_2003 | D | June 9, 2025, 4:20 p.m. | OK | PyPy 3-64 | TESTS | 12 | 156 | 27136000 | ||
| 323716829 | Om_Singh_ | D | June 10, 2025, 5:50 a.m. | OK | PyPy 3-64 | TESTS | 12 | 156 | 29184000 | ||
| 323676004 | fawnPersona | D | June 9, 2025, 6:08 p.m. | OK | PyPy 3-64 | TESTS | 12 | 171 | 25804800 | ||
| 323607728 | Haksell | D | June 9, 2025, 9:27 a.m. | OK | PyPy 3-64 | TESTS | 12 | 186 | 27340800 | ||
| 323582988 | denisvlasov | D | June 9, 2025, 5:48 a.m. | OK | Python 3 | TESTS | 12 | 109 | 26316800 | ||
| 323582194 | denisvlasov | D | June 9, 2025, 5:41 a.m. | OK | Python 3 | TESTS | 12 | 140 | 26521600 | ||
| 323592061 | ayushdreams147 | D | June 9, 2025, 7:21 a.m. | OK | Python 3 | TESTS | 12 | 155 | 26726400 | ||
| 323609612 | FyReX_KING635 | D | June 9, 2025, 9:41 a.m. | OK | Python 3 | TESTS | 12 | 155 | 26931200 | ||
| 323682991 | sh.4teen | D | June 9, 2025, 7:16 p.m. | OK | Python 3 | TESTS | 12 | 171 | 25088000 | ||
| 323628868 | mastacoda | D | June 9, 2025, 12:05 p.m. | OK | Python 3 | TESTS | 12 | 171 | 25395200 | ||
| 323678659 | nirupamatiitd | D | June 9, 2025, 6:30 p.m. | OK | Python 3 | TESTS | 12 | 171 | 26726400 | ||
| 323612875 | scorpion | D | June 9, 2025, 10:04 a.m. | OK | Python 3 | TESTS | 12 | 171 | 26931200 | ||
| 323706649 | pundruvarshith17 | D | June 10, 2025, 3:42 a.m. | OK | Python 3 | TESTS | 12 | 187 | 25395200 | ||
| 323610560 | ___a_s_1_2___ | D | June 9, 2025, 9:48 a.m. | OK | Python 3 | TESTS | 12 | 187 | 26726400 | ||
| 323668009 | ramialkawadri | D | June 9, 2025, 5 p.m. | OK | Rust 2021 | TESTS | 12 | 77 | 2560000 | ||
| 323714990 | PlaceOrientedProgrammer | D | June 10, 2025, 5:30 a.m. | OK | Rust 2021 | TESTS | 12 | 77 | 4198400 |
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