Problem A
Snapper Chain (Hard) — Problem Statistics

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Submissions	2756
Accepted submissions	1412
Submission ratio	51.23%
Authors	1228
Accepted authors	1146
Author ratio	93.32%

#	User	Runtime	Language	Date
1	Chenzhang Hu	0.10 s	Bash	2024-04-16 15:20:19

#	User	Runtime	Language	Date
1	Fredrik Lygre Bergesen	0.04 s	C#	2019-04-11 22:10:20
2	Henrik Hallbert	0.04 s	C#	2022-01-13 08:46:12
3	Mustafa Dinler	0.05 s	C#	2016-07-07 00:23:00
4	Klas af Geijerstam	0.05 s	C#	2017-05-04 16:50:30
5	Pontus Eriksson	0.05 s	C#	2017-07-17 20:17:58
6	Doug Goodman	0.05 s	C#	2018-05-11 22:47:13
7	Jonathan Ibrahim	0.05 s	C#	2020-12-08 12:27:48
8	Mads Storm Hansen	0.06 s	C#	2015-07-19 19:38:13
9	Nils Lenart	0.06 s	C#	2020-03-20 14:29:33
10	traxex	0.06 s	C#	2024-05-15 15:38:23

#	User	Runtime	Language	Date
1	Hidden user	0.03 s	Common Lisp	2019-07-22 07:24:45
2	David Cawthon	0.05 s	Common Lisp	2020-11-27 23:40:58

#	User	Runtime	Language	Date
1	Husain Satan	0.03 s	Go	2023-11-14 11:39:33
2	Krzysztof Gibuła	0.04 s	Go	2019-01-20 13:32:07
3	Norbert Voelker	0.11 s	Go	2021-06-16 23:16:37
4	Hidden user	0.15 s	Go	2024-10-04 00:53:44
5	Ian Howell	0.18 s	Go	2019-03-26 22:05:09

#	User	Runtime	Language	Date
1	Jan Hrček	0.01 s	Haskell	2021-04-08 13:15:58
2	Steinar Simonnes	0.01 s	Haskell	2024-03-31 17:06:37
3	Esther Chong	0.04 s	Haskell	2018-01-25 06:38:55
4	Chase Hinesman	0.04 s	Haskell	2018-05-11 04:30:55
5	Hidden user	0.04 s	Haskell	2019-10-26 16:30:42
6	Juan Miguel Vilar	0.04 s	Haskell	2020-10-21 17:45:01
7	Sergio Martín Sempere	0.04 s	Haskell	2020-10-26 19:28:20
8	Johan Meier	0.05 s	Haskell	2016-12-30 21:53:51
9	Brent Yorgey	0.05 s	Haskell	2017-11-26 07:52:56
10	Qi Ji	0.05 s	Haskell	2018-07-06 17:41:10

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.05 s	Java	2024-09-08 16:28:02
2	William Fiset	0.08 s	Java	2016-07-11 03:10:16
3	Jan Štola	0.09 s	Java	2015-05-12 15:29:19
4	Kristoffer Borgstrøm	0.10 s	Java	2021-01-19 21:48:40
5	Paul Boddington	0.11 s	Java	2016-05-02 16:42:54
6	Jimmy Mårdell	0.12 s	Java	2015-01-03 14:38:22
7	Erik Nyström	0.12 s	Java	2016-03-29 16:37:08
8	Martijn Muijsers	0.12 s	Java	2016-10-12 23:18:18
9	Hidden user	0.12 s	Java	2016-12-02 23:08:19
10	Nguyệt Nguyễn	0.12 s	Java	2016-12-16 17:05:06

#	User	Runtime	Language	Date
1	Khin Nyunt	0.61 s	JavaScript (Node.js)	2021-12-01 15:38:16

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.02 s	JavaScript (SpiderMonkey)	2016-08-03 12:27:40
2	Christian Cederquist	0.05 s	JavaScript (SpiderMonkey)	2023-02-18 09:01:21
3	Jimmy Gustafsson	0.05 s	JavaScript (SpiderMonkey)	2024-08-21 16:32:17

#	User	Runtime	Language	Date
1	Timothy Gaede	0.64 s	Julia	2024-09-09 07:28:08

#	User	Runtime	Language	Date
1	Johnny Baloney	0.22 s	Kotlin	2022-01-07 01:34:16
2	Hidden user	0.24 s	Kotlin	2020-01-10 00:21:29
3	Terairk	0.24 s	Kotlin	2024-03-14 17:19:41
4	Adam Rankin	0.36 s	Kotlin	2023-08-25 23:09:38
5	Sergey Jakobsen	0.44 s	Kotlin	2021-07-28 02:40:47
6	Stephen Atwood	0.44 s	Kotlin	2024-09-13 18:38:07
7	Adam Koprowski	0.46 s	Kotlin	2020-08-21 09:51:47
8	Colin Gay	0.49 s	Kotlin	2019-05-25 20:02:29
9	Neil Harmon	0.49 s	Kotlin	2019-07-29 10:30:59
10	Troy Warmboe	0.50 s	Kotlin	2020-02-20 05:07:29

#	User	Runtime	Language	Date
1	Adrian Borup	0.01 s	Perl	2024-10-27 19:04:27

#	User	Runtime	Language	Date
1	Silvena Lam	0.03 s	PHP	2016-06-06 16:49:27

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.17 s	Prolog	2016-11-23 18:05:26

#	User	Runtime	Language	Date
1	Siri Dovner	0.05 s	Python 2	2016-10-15 14:10:33
2	Lukas Polacek	0.06 s	Python 2	2014-11-24 16:01:37
3	David Bundgaard	0.06 s	Python 2	2016-02-07 17:56:58
4	Alvaro Silvino	0.06 s	Python 2	2016-03-29 00:24:43
5	James Lawson	0.06 s	Python 2	2019-03-01 14:06:37
6	Ocram Esah	0.06 s	Python 2	2022-04-12 17:14:41
7	Christofer Ohlsson	0.07 s	Python 2	2015-05-03 09:20:19
8	Nick Wu	0.07 s	Python 2	2015-10-07 22:48:38
9	Frederik Højholt	0.07 s	Python 2	2015-12-22 16:34:12
10	Hermon Mulat	0.07 s	Python 2	2016-11-09 15:28:56

#	User	Runtime	Language	Date
1	Joshua Coward	0.03 s	Python 3	2019-11-20 21:16:00
2	Wayne	0.04 s	Python 3	2016-02-15 16:50:00
3	Tore Norderud	0.04 s	Python 3	2016-04-20 02:31:09
4	Hidden user	0.04 s	Python 3	2016-08-20 17:34:30
5	Josenildo Silva	0.04 s	Python 3	2016-11-15 16:47:15
6	Ram Basnet	0.04 s	Python 3	2017-05-18 18:32:19
7	Herman Appelgren	0.04 s	Python 3	2017-12-23 00:42:41
8	Wyatt Praharenka	0.04 s	Python 3	2018-01-12 09:49:24
9	Hidden user	0.04 s	Python 3	2018-04-19 11:48:36
10	Andri Rafn	0.04 s	Python 3	2018-05-10 18:30:45

#	User	Runtime	Language	Date
1	Taiju Yamada	0.04 s	Ruby	2016-05-20 13:54:03
2	Erik Rydbert	0.04 s	Ruby	2016-08-09 10:23:50
3	Casper Christensen	0.05 s	Ruby	2016-03-31 14:58:04
4	Adam Hellberg	0.06 s	Ruby	2019-09-26 11:48:27
5	Hidden user	0.06 s	Ruby	2019-10-14 01:34:17
6	Thomas Feld	0.07 s	Ruby	2023-02-13 12:10:37

#	User	Runtime	Language	Date
1	Pahlevi Fikri Auliya	0.00 s	Rust	2020-10-28 23:05:03
2	Vincent Lagerros	0.00 s	Rust	2025-02-17 13:56:03
3	Hidden user	0.00 s	Rust	2025-02-23 23:55:25
4	Artur Khuziakhmetov	0.01 s	Rust	2022-08-09 15:25:15
5	Hidden user	0.01 s	Rust	2022-11-27 18:14:33
6	Eric Pinter	0.02 s	Rust	2021-06-27 18:34:22
7	Bas Dirks	0.02 s	Rust	2022-01-09 10:38:48
8	Reis Faar	0.02 s	Rust	2023-05-31 21:57:01

#	User	Length	Language	Date
1	Chenzhang Hu	5	Bash	2024-04-16 15:20:19

#	User	Length	Language	Date
1	Martin Andronikos	161	C	2024-11-11 22:17:54
2	Dan Rubery	244	C	2015-04-11 17:11:49
3	Wayne	254	C	2016-02-15 17:26:41
4	Nguyen Dang Hai	269	C	2016-05-03 04:37:14
5	Leslie Yip	348	C	2022-10-09 14:42:16
6	Rabbani Islam Refat	356	C	2024-02-15 13:27:17
7	Hidden user	364	C	2017-05-03 07:58:45
8	Samuel Wrååk	366	C	2016-11-28 19:14:59
9	Sambit Palit	379	C	2020-10-01 00:46:28
10	Andrew Roberts	383	C	2017-10-07 01:19:35

#	User	Length	Language	Date
1	traxex	321	C#	2024-05-15 15:38:23
2	Pontus Eriksson	433	C#	2017-07-17 20:17:58
3	Klas af Geijerstam	530	C#	2017-05-04 16:50:30
4	Doug Goodman	731	C#	2018-05-11 22:47:13
5	Mustafa Dinler	918	C#	2016-07-07 00:23:00
6	Henrik Hallbert	929	C#	2022-01-13 08:46:12
7	Fredrik Lygre Bergesen	1045	C#	2019-04-11 22:10:20
8	samvid mistry	1104	C#	2024-12-28 21:24:28
9	Mads Storm Hansen	1155	C#	2015-07-19 19:38:13
10	Mikael Fiala-Lundström	3307	C#	2021-06-14 11:55:32

#	User	Length	Language	Date
1	Francisco Carvajal	215	C++	2023-06-17 06:13:08
2	Herman Karlsson	218	C++	2015-11-02 21:46:02
3	Ryan Chew	221	C++	2019-07-29 12:07:11
4	Jun Yan	221	C++	2024-07-30 06:37:51
5	William Gan	222	C++	2017-02-23 14:20:49
6	David Wärn	226	C++	2015-02-17 17:50:35
7	Leonardo Blanger	227	C++	2020-10-03 23:59:58
8	Matthew Joseph Schallenkamp	228	C++	2018-10-03 03:56:51
9	Syx Pek	230	C++	2016-01-28 18:09:55
10	Way Tan	233	C++	2018-12-05 19:31:15

#	User	Length	Language	Date
1	Hidden user	242	Common Lisp	2019-07-22 07:18:37
2	David Cawthon	458	Common Lisp	2020-11-27 23:40:58

#	User	Length	Language	Date
1	Ian Howell	313	Go	2019-03-26 22:05:09
2	Husain Satan	475	Go	2023-11-14 11:39:33
3	Krzysztof Gibuła	589	Go	2019-01-20 13:32:07
4	Hidden user	732	Go	2024-10-04 00:53:44
5	Norbert Voelker	2292	Go	2021-06-16 23:16:37

#	User	Length	Language	Date
1	Chase Hinesman	240	Haskell	2018-05-11 04:30:55
2	Brent Yorgey	389	Haskell	2017-11-26 07:52:56
3	Qi Ji	413	Haskell	2018-07-06 17:41:10
4	Johan Meier	458	Haskell	2016-12-30 21:53:51
5	Juan Miguel Vilar	471	Haskell	2020-10-21 17:45:01
6	Esther Chong	639	Haskell	2018-01-25 06:38:55
7	Andrés Marzal Varó	695	Haskell	2020-10-26 14:44:26
8	Jan Hrček	722	Haskell	2021-04-08 13:15:58
9	Sergio Martín Sempere	738	Haskell	2020-10-26 19:28:20
10	Steinar Simonnes	785	Haskell	2024-03-31 17:08:05

#	User	Length	Language	Date
1	Ada Clevinger	372	Java	2018-06-07 03:44:58
2	Marcus Der	379	Java	2020-11-02 06:07:32
3	Thailsson Clementino	385	Java	2020-12-28 18:44:50
4	Orio Wu	414	Java	2015-10-17 07:31:05
5	Nils Olsson	416	Java	2021-04-06 12:04:57
6	Luke Craig	417	Java	2016-02-17 23:06:08
7	Zach Westover	420	Java	2019-01-30 09:55:56
8	Caeden Whitaker	424	Java	2020-10-18 05:22:57
9	Daniel West	424	Java	2018-04-01 09:56:09
10	Wang Zhi Jian	428	Java	2018-08-16 12:32:40

#	User	Length	Language	Date
1	Khin Nyunt	762	JavaScript (Node.js)	2021-12-01 15:38:16

#	User	Length	Language	Date
1	Christian Cederquist	96	JavaScript (SpiderMonkey)	2023-02-18 09:01:21
2	Jimmy Gustafsson	101	JavaScript (SpiderMonkey)	2024-08-21 16:32:17
3	Bjørn Chr. Soltvedt	220	JavaScript (SpiderMonkey)	2016-08-03 12:27:40

#	User	Length	Language	Date
1	Timothy Gaede	381	Julia	2024-09-09 07:28:08

#	User	Length	Language	Date
1	Sergey Jakobsen	253	Kotlin	2021-07-28 02:40:47
2	Stephen Atwood	316	Kotlin	2024-09-13 18:38:07
3	Adam Koprowski	357	Kotlin	2020-08-21 09:51:47
4	Troy Warmboe	384	Kotlin	2020-02-20 05:07:29
5	Adam Rankin	388	Kotlin	2023-08-25 23:09:38
6	Colin Gay	392	Kotlin	2019-05-25 20:02:29
7	Johnny Baloney	727	Kotlin	2022-01-07 01:34:16
8	Neil Harmon	750	Kotlin	2019-07-29 10:30:59
9	Hidden user	1220	Kotlin	2020-01-10 00:21:29
10	Terairk	2533	Kotlin	2024-03-14 17:19:41

#	User	Length	Language	Date
1	Adrian Borup	205	Perl	2024-10-27 19:06:17

#	User	Length	Language	Date
1	Silvena Lam	609	PHP	2016-06-06 16:49:27

#	User	Length	Language	Date
1	Andriy Zyevakov	1502	Prolog	2016-11-23 18:05:26

#	User	Length	Language	Date
1	Thomas Feld	131	Python 2	2019-09-12 11:35:22
2	Erik Odenman	149	Python 2	2015-05-15 02:25:22
3	Jesper Öqvist	175	Python 2	2018-10-28 16:20:32
4	Izzati Al Vandiar	176	Python 2	2015-11-09 03:27:43
5	Andreas Björklund	189	Python 2	2019-03-13 19:43:03
6	Guan Yang Ze	190	Python 2	2019-09-06 16:27:07
7	Justin Su	191	Python 2	2017-09-24 22:17:47
8	Paulo Bu	192	Python 2	2015-03-30 15:58:16
9	Johan Lyts	213	Python 2	2020-01-19 15:20:00
10	Lim Hong Hui Eugene	232	Python 2	2019-04-26 09:29:30

#	User	Length	Language	Date
1	Noah Hessen Bjerke	109	Python 3	2024-05-05 14:13:39
2	Lee Isaac	111	Python 3	2023-01-23 23:14:41
3	Frans Meulenbroeks	120	Python 3	2024-10-30 12:27:48
4	David Aldenbro	127	Python 3	2025-02-28 11:30:28
5	Jason Clarke	127	Python 3	2024-07-20 11:55:56
6	Michael Goldwasser	129	Python 3	2024-09-05 05:14:56
7	Tai Tze Kin	133	Python 3	2024-05-04 18:29:54
8	Clement Oh	135	Python 3	2023-10-12 13:38:31
9	Hidden user	135	Python 3	2021-06-10 12:49:21
10	Thomas Draper	136	Python 3	2022-10-14 04:12:54

#	User	Length	Language	Date
1	Thomas Feld	75	Ruby	2023-02-13 12:15:22
2	Taiju Yamada	115	Ruby	2016-05-20 13:54:03
3	Erik Rydbert	186	Ruby	2016-08-09 10:23:50
4	Adam Hellberg	201	Ruby	2019-09-26 11:48:27
5	Casper Christensen	202	Ruby	2016-03-31 14:58:04
6	Hidden user	269	Ruby	2019-10-14 01:34:17

#	User	Length	Language	Date
1	Bas Dirks	481	Rust	2022-01-09 10:38:48
2	Vincent Lagerros	551	Rust	2025-02-17 13:56:03
3	Artur Khuziakhmetov	592	Rust	2022-08-09 15:25:15
4	Reis Faar	905	Rust	2023-05-31 21:57:01
5	Eric Pinter	947	Rust	2021-06-27 18:34:22
6	Hidden user	1178	Rust	2022-11-27 18:14:33
7	Pahlevi Fikri Auliya	1768	Rust	2020-10-28 23:05:03
8	Hidden user	3492	Rust	2025-02-23 23:55:25

Solution running time distribution