Problem C
Left Beehind — Problem Statistics

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Submissions	14157
Accepted submissions	5836
Submission ratio	41.22%
Authors	5622
Accepted authors	5284
Author ratio	93.99%

#	User	Runtime	Language	Date
1	Michael Wichlinski	0.00 s	Ada	2025-03-31 22:31:59

#	User	Runtime	Language	Date
1	Danny Robinson	0.01 s	Bash	2023-09-12 15:08:34
2	Thomas Feld	0.01 s	Bash	2023-09-13 12:49:09

#	User	Runtime	Language	Date
1	Robert Low	0.01 s	C#	2016-08-03 22:34:12
2	Ugnius Skučas	0.01 s	C#	2016-10-16 13:57:20
3	Max Nylander	0.01 s	C#	2017-07-07 20:20:27
4	Johan Pettersson	0.01 s	C#	2017-10-02 01:05:18
5	Faisal Rahman	0.01 s	C#	2017-11-01 16:00:32
6	Ron Harper	0.01 s	C#	2018-01-08 18:59:45
7	Duelene Olson	0.02 s	C#	2016-08-06 23:28:14
8	Jens Mossig	0.02 s	C#	2017-02-18 12:48:57
9	Rasmus Brants	0.02 s	C#	2017-04-12 09:14:29
10	Þorsteinn Þorvaldsson	0.02 s	C#	2017-05-30 02:34:06

#	User	Runtime	Language	Date
1	Brandon Mitchell	0.00 s	COBOL	2020-04-09 06:31:47

#	User	Runtime	Language	Date
1	David Cawthon	0.02 s	Common Lisp	2019-04-20 18:31:05

#	User	Runtime	Language	Date
1	Patrick Bahr	0.03 s	F#	2021-02-21 22:34:29
2	Jacob Harris Cryer Kragh	0.03 s	F#	2022-06-25 21:42:59
3	Mads Jespersen	0.07 s	F#	2020-02-27 16:20:31

#	User	Runtime	Language	Date
1	Husain Satan	0.00 s	Go	2023-11-19 10:21:29
2	Hidden user	0.00 s	Go	2024-04-28 06:36:40
3	n k	0.00 s	Go	2025-01-13 15:49:03
4	Jimmy Nejtron	0.00 s	Go	2025-01-18 14:06:02
5	Zakki Baldani	0.00 s	Go	2025-03-10 05:31:25
6	Alejandro Germain	0.01 s	Go	2018-10-19 20:50:37
7	Hidden user	0.02 s	Go	2018-10-16 19:21:02
8	Krzysztof Gibuła	0.02 s	Go	2019-03-15 23:01:37
9	Conrad Parker	0.02 s	Go	2020-08-14 03:00:02
10	Nicholas Lian	0.02 s	Go	2020-09-27 06:14:28

#	User	Runtime	Language	Date
1	Ranjith M	0.04 s	Java	2024-08-02 22:49:44
2	CUX "INDIO" PRADA	0.04 s	Java	2024-08-10 06:17:59
3	timot	0.04 s	Java	2024-08-12 10:17:47
4	Vashista Basava	0.04 s	Java	2024-08-13 12:15:11
5	Goh Zhixuan Jeremiah	0.04 s	Java	2025-02-08 09:12:46
6	Terrence Park	0.05 s	Java	2016-07-07 05:56:17
7	Micah Stairs	0.05 s	Java	2016-07-08 06:26:39
8	Omar Brome	0.05 s	Java	2016-07-30 11:13:06
9	Nick Wu	0.05 s	Java	2016-08-06 05:13:25
10	Erik Baalhuis	0.05 s	Java	2016-08-12 19:37:26

#	User	Runtime	Language	Date
1	Hidden user	0.04 s	JavaScript (Node.js)	2024-10-17 06:42:45
2	Sander Hellesø	0.05 s	JavaScript (Node.js)	2019-04-14 02:34:53
3	Ricardo Velasco Guachalla	0.09 s	JavaScript (Node.js)	2023-02-25 00:25:55
4	Joe Walbran	0.41 s	JavaScript (Node.js)	2019-12-27 17:56:48
5	Chris Wong	0.41 s	JavaScript (Node.js)	2021-02-07 18:44:02
6	Emma Högberg	0.41 s	JavaScript (Node.js)	2022-05-21 17:16:26
7	Hovhannes Kantuni	0.42 s	JavaScript (Node.js)	2020-09-02 20:44:40
8	Michael Zetterholm	0.42 s	JavaScript (Node.js)	2020-09-25 11:24:45
9	Andoko Chandra	0.42 s	JavaScript (Node.js)	2020-10-08 17:47:54
10	neil	0.42 s	JavaScript (Node.js)	2020-12-01 06:46:10

#	User	Runtime	Language	Date
1	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2016-07-10 09:47:15
2	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-07-25 14:32:25
3	Ionel Hindorean	0.01 s	JavaScript (SpiderMonkey)	2016-12-02 15:30:18
4	Peter Menyes	0.01 s	JavaScript (SpiderMonkey)	2017-08-27 22:40:43
5	Dilawar Mahmood	0.01 s	JavaScript (SpiderMonkey)	2018-01-20 18:32:11
6	Omar Al-Khashab	0.01 s	JavaScript (SpiderMonkey)	2018-04-25 09:13:07
7	Goran Sherko Jawdat	0.01 s	JavaScript (SpiderMonkey)	2018-04-25 17:00:13
8	Nicklas Utgaard	0.02 s	JavaScript (SpiderMonkey)	2021-04-18 13:36:38
9	Christian Cederquist	0.02 s	JavaScript (SpiderMonkey)	2022-12-29 00:25:58
10	Zach Tschetter	0.02 s	JavaScript (SpiderMonkey)	2023-09-19 19:53:17

#	User	Runtime	Language	Date
1	Danny Robinson	0.52 s	Julia	2023-06-21 17:16:00
2	Timothy Gaede	0.55 s	Julia	2024-03-27 06:18:49

#	User	Runtime	Language	Date
1	Dayan Ruben Gonzalez	0.14 s	Kotlin	2020-09-28 02:38:02
2	Antony Mwangi	0.15 s	Kotlin	2019-07-07 22:09:08
3	James WIlliams	0.15 s	Kotlin	2020-09-02 00:24:05
4	Ahmed Waseem Saeed	0.16 s	Kotlin	2021-12-19 22:01:26
5	Zaw Myat	0.18 s	Kotlin	2023-12-18 15:27:08
6	Neil Harmon	0.19 s	Kotlin	2019-04-09 16:25:41
7	Adam Koprowski	0.19 s	Kotlin	2020-08-11 11:28:59
8	Merih Bora Poçan	0.19 s	Kotlin	2020-08-14 15:16:00
9	Johnny Baloney	0.19 s	Kotlin	2021-09-05 12:34:34
10	Dmitry Shostak	0.20 s	Kotlin	2019-08-18 18:19:25

#	User	Runtime	Language	Date
1	Sander de Haan	0.00 s	Lua	2025-04-09 12:10:07

#	User	Runtime	Language	Date
1	Angela Li	0.00 s	Objective-C	2017-08-03 19:53:22

#	User	Runtime	Language	Date
1	Lars Åström	0.00 s	OCaml	2020-03-18 12:18:31
2	Philip Pham	0.00 s	OCaml	2020-10-07 03:16:08
3	Danil Braun	0.00 s	OCaml	2021-05-07 14:28:42
4	Rafał Gwoździński	0.00 s	OCaml	2021-05-26 21:46:02
5	Xiu-Heng Hua	0.00 s	OCaml	2024-12-14 16:27:36

#	User	Runtime	Language	Date
1	David Connolly	0.00 s	Pascal	2017-08-23 17:27:33
2	Vova Podkorytov	0.00 s	Pascal	2017-12-11 19:37:41
3	Ingemar Ragnemalm	0.00 s	Pascal	2018-02-22 08:33:07
4	林達炘4D20 Lam Tat Yan	0.00 s	Pascal	2020-02-19 05:52:11

#	User	Runtime	Language	Date
1	Steven D. Wilson	0.01 s	PHP	2016-11-28 03:25:18
2	Henry Kiame	0.01 s	PHP	2019-07-08 11:40:34
3	cojonas1	0.01 s	PHP	2021-03-24 11:55:40
4	Renate	0.01 s	PHP	2021-04-13 03:22:00
5	陳建宏	0.01 s	PHP	2021-05-06 18:18:00
6	Andre Wahyudi	0.01 s	PHP	2023-03-16 02:51:53

#	User	Runtime	Language	Date
1	Hadi Qovaizi	0.01 s	Prolog	2016-11-25 19:08:16
2	Andriy Zyevakov	0.01 s	Prolog	2017-12-16 00:04:05
3	Hakan Kjellerstrand	0.02 s	Prolog	2023-02-08 10:14:07

#	User	Runtime	Language	Date
1	Christofer Ohlsson	0.02 s	Python 2	2016-07-07 00:22:20
2	Erik Sillén	0.02 s	Python 2	2016-07-10 21:59:55
3	Marko Lazic	0.02 s	Python 2	2016-07-23 16:18:00
4	Meme Maestro	0.02 s	Python 2	2016-07-24 13:52:36
5	Love Engman	0.02 s	Python 2	2016-08-19 09:59:57
6	Maksym Bendeberia	0.02 s	Python 2	2016-09-22 12:55:28
7	Bernhard Kartefla	0.02 s	Python 2	2016-09-23 18:37:57
8	Hidden user	0.02 s	Python 2	2016-09-26 20:38:20
9	Frederik Højholt	0.02 s	Python 2	2016-09-27 12:18:35
10	Hasan Ramezani	0.02 s	Python 2	2016-10-14 19:34:07

#	User	Runtime	Language	Date
1	Wayne	0.02 s	Python 3	2016-07-09 10:38:48
2	Patrik Lilja	0.02 s	Python 3	2016-07-25 10:16:33
3	Hans Fotsing	0.02 s	Python 3	2016-08-03 12:17:30
4	Shane Grogan	0.02 s	Python 3	2016-08-04 16:55:23
5	Nathan Collins	0.02 s	Python 3	2016-08-24 02:08:52
6	Tom Biju	0.02 s	Python 3	2016-09-17 00:01:55
7	Spencer M	0.02 s	Python 3	2016-09-29 08:25:47
8	Lucia Pál (Simanová)	0.02 s	Python 3	2016-10-11 23:45:25
9	Anton Smith	0.02 s	Python 3	2016-10-12 18:54:00
10	Cristian Baba	0.02 s	Python 3	2016-10-13 22:50:47

#	User	Runtime	Language	Date
1	Jinwoo Lee	0.22 s	Racket	2025-02-02 01:08:22

#	User	Runtime	Language	Date
1	Erik Rydbert	0.03 s	Ruby	2016-08-04 13:40:01
2	Chris Weston	0.03 s	Ruby	2016-09-28 00:15:54
3	Kellen Watt	0.03 s	Ruby	2016-10-29 19:35:40
4	Joy Cantimbuhan	0.03 s	Ruby	2017-06-08 02:08:24
5	Lee Tze Han	0.04 s	Ruby	2018-06-16 16:19:56
6	Hidden user	0.04 s	Ruby	2018-10-16 19:04:04
7	Uğurcan Eser	0.04 s	Ruby	2018-11-09 19:22:54
8	Lim Ming Yean	0.04 s	Ruby	2018-11-23 13:15:27
9	Savvas Alexandrou	0.04 s	Ruby	2018-12-07 21:10:28
10	Hidden user	0.04 s	Ruby	2019-02-27 17:56:29

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Swift	2024-09-04 20:51:54

#	User	Length	Language	Date
1	Michael Wichlinski	613	Ada	2025-03-31 22:31:59

#	User	Length	Language	Date
1	Thomas Feld	105	Bash	2023-09-13 12:50:30
2	Danny Robinson	109	Bash	2023-09-12 15:08:34

#	User	Length	Language	Date
1	Eduardo Núñez	136	C	2024-02-25 21:14:16
2	Emil Wihlander	304	C	2020-11-30 01:39:21
3	Ethan Ou	305	C	2021-02-26 12:10:10
4	Lee Geng Yu	307	C	2018-02-06 08:57:01
5	Elston Aw	313	C	2018-02-15 06:44:01
6	Matthew Weston	322	C	2022-01-17 21:50:05
7	Ibrahim Abdellaoui	325	C	2017-10-25 21:35:59
8	Hidden user	329	C	2016-08-03 22:00:30
9	Juan Andres Osorio Escobar	330	C	2021-03-12 20:47:57
10	Hidden user	331	C	2018-10-31 20:34:59

#	User	Length	Language	Date
1	Mikael Palokangas	287	C#	2023-01-16 08:53:55
2	Hidden user	592	C#	2024-07-30 20:32:49
3	florist swe	603	C#	2024-12-07 01:02:53
4	Göran Andersson	604	C#	2022-05-11 18:26:15
5	Esty Crow	628	C#	2024-10-11 13:43:46
6	Benjamin Iserman	638	C#	2021-10-18 20:32:22
7	clarence chen	651	C#	2024-10-11 18:40:06
8	Anthony Ye	651	C#	2024-10-24 22:43:05
9	Nicke Nyfiken	652	C#	2025-02-19 11:14:47
10	Benjamin Bilbeau	670	C#	2024-09-18 22:40:32

#	User	Length	Language	Date
1	Oisín Mac Fhearaí	152	C++	2025-02-17 21:25:50
2	Hakan Kjellerstrand	167	C++	2025-02-17 19:31:03
3	Oliver Ruste Jahren	177	C++	2023-10-30 11:31:50
4	Tyler Fernando	179	C++	2022-11-05 13:26:24
5	Hidden user	204	C++	2025-01-22 18:39:18
6	Dominic Sagen	217	C++	2022-10-07 00:31:17
7	Himanshu Saini	266	C++	2022-06-01 12:51:55
8	Hidden user	273	C++	2022-12-20 16:21:24
9	Mohammad Sadeghi	275	C++	2019-07-10 18:31:14
10	妹様万歳	286	C++	2020-03-31 03:50:47

#	User	Length	Language	Date
1	Brandon Mitchell	899	COBOL	2020-04-09 06:31:47

#	User	Length	Language	Date
1	David Cawthon	283	Common Lisp	2019-04-20 18:31:05

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	461	F#	2022-06-25 21:42:59
2	Mads Jespersen	691	F#	2020-02-27 16:20:31
3	Patrick Bahr	2096	F#	2021-02-21 22:34:29

#	User	Length	Language	Date
1	Hidden user	344	Go	2018-10-16 19:21:02
2	Jimmy Nejtron	349	Go	2025-01-18 14:06:02
3	Hidden user	352	Go	2023-04-12 22:00:45
4	Hidden user	372	Go	2016-08-09 15:21:52
5	Conrad Parker	376	Go	2020-08-14 03:00:02
6	n k	412	Go	2025-01-13 15:49:03
7	Zakki Baldani	413	Go	2025-03-10 05:31:25
8	Brandon Ibbotson	414	Go	2017-03-17 22:58:40
9	Hidden user	428	Go	2024-04-28 06:36:40
10	Marcin Dudek	468	Go	2020-11-25 22:19:01

#	User	Length	Language	Date
1	Rudy Matela	164	Haskell	2025-02-06 10:22:30
2	Zach Tschetter	240	Haskell	2023-03-23 20:54:40
3	Sebastian Banert	258	Haskell	2023-10-24 23:21:45
4	Li Jun	275	Haskell	2023-06-20 18:25:21
5	Brent Yorgey	276	Haskell	2017-10-08 02:34:17
6	David Zacek	313	Haskell	2021-05-03 23:47:29
7	Matthew Gvasalia	318	Haskell	2023-04-17 15:45:32
8	Md Akif Chowdhury	319	Haskell	2022-09-24 09:07:09
9	Ramesh baskaran	325	Haskell	2024-10-11 05:19:47
10	Nicholas Marsh	330	Haskell	2022-09-17 19:14:46

#	User	Length	Language	Date
1	Jason Liu	396	Java	2023-05-14 23:30:59
2	Frankie Chen	421	Java	2019-02-07 02:36:44
3	Doug Goodman	424	Java	2018-02-01 22:44:03
4	Nathaniel Lukas Christianto	436	Java	2023-12-26 11:02:53
5	Natalie Longtin	451	Java	2017-12-06 00:51:23
6	Paul Boddington	454	Java	2017-01-01 02:46:57
7	Anoja	460	Java	2022-11-10 06:38:57
8	hicham chatir	461	Java	2022-11-08 20:39:37
9	Koosha	465	Java	2022-11-12 15:44:14
10	Sergio Baguena	466	Java	2024-04-22 04:18:52

#	User	Length	Language	Date
1	Hidden user	517	JavaScript (Node.js)	2022-04-18 16:58:14
2	Chris Wong	536	JavaScript (Node.js)	2021-02-07 18:44:02
3	Greg Gorlen	536	JavaScript (Node.js)	2022-05-20 19:58:37
4	lennart chua	548	JavaScript (Node.js)	2022-04-23 08:08:34
5	derrick lee	548	JavaScript (Node.js)	2022-04-24 13:58:35
6	caden cheong	549	JavaScript (Node.js)	2022-04-23 11:03:43
7	Muhd Hifzur Rahman	572	JavaScript (Node.js)	2022-04-18 06:04:55
8	Kai Joon Leong	575	JavaScript (Node.js)	2022-04-18 09:00:47
9	Md Syauqi	577	JavaScript (Node.js)	2022-04-20 08:34:29
10	addamove	580	JavaScript (Node.js)	2022-02-20 18:46:42

#	User	Length	Language	Date
1	Jimmy Gustafsson	156	JavaScript (SpiderMonkey)	2024-07-13 17:36:11
2	Bjørn Chr. Soltvedt	268	JavaScript (SpiderMonkey)	2016-07-25 14:32:25
3	Christian Cederquist	309	JavaScript (SpiderMonkey)	2022-12-29 00:25:58
4	Evan Magill	309	JavaScript (SpiderMonkey)	2024-09-16 19:59:50
5	Peter Kedemo	377	JavaScript (SpiderMonkey)	2016-07-10 09:47:15
6	Trey	404	JavaScript (SpiderMonkey)	2023-09-19 19:53:49
7	Dilawar Mahmood	412	JavaScript (SpiderMonkey)	2018-01-20 18:32:11
8	Pranjal Paneru	417	JavaScript (SpiderMonkey)	2023-10-21 20:07:13
9	Drake Farrokhi	436	JavaScript (SpiderMonkey)	2023-09-22 23:18:29
10	Tejas Budharamu	436	JavaScript (SpiderMonkey)	2024-01-21 04:20:26

#	User	Length	Language	Date
1	Danny Robinson	165	Julia	2023-06-21 17:18:20
2	Timothy Gaede	1020	Julia	2024-03-27 06:18:49

#	User	Length	Language	Date
1	Hamdanil Rasyid	339	Kotlin	2025-03-31 03:45:09
2	Dmitry Shostak	385	Kotlin	2019-08-18 18:19:25
3	Adam Koprowski	453	Kotlin	2020-08-11 11:28:59
4	Dayan Ruben Gonzalez	468	Kotlin	2020-09-28 02:38:02
5	Ahmed Waseem Saeed	509	Kotlin	2021-12-19 22:01:26
6	Johnny Baloney	538	Kotlin	2021-09-05 12:34:34
7	Troy Warmboe	549	Kotlin	2020-02-10 21:15:43
8	Merih Bora Poçan	580	Kotlin	2020-08-14 15:16:00
9	Adam Rankin	651	Kotlin	2023-04-22 00:59:41
10	Zaw Myat	718	Kotlin	2023-12-18 15:27:08

#	User	Length	Language	Date
1	Sander de Haan	542	Lua	2025-04-09 12:10:07

#	User	Length	Language	Date
1	Angela Li	3296	Objective-C	2017-08-03 19:53:22

#	User	Length	Language	Date
1	Lars Åström	366	OCaml	2020-03-18 12:18:31
2	Xiu-Heng Hua	426	OCaml	2024-12-14 16:27:36
3	Philip Pham	445	OCaml	2020-10-07 03:16:08
4	Danil Braun	448	OCaml	2021-05-07 14:28:42
5	Rafał Gwoździński	450	OCaml	2021-05-26 21:46:02

#	User	Length	Language	Date
1	林達炘4D20 Lam Tat Yan	399	Pascal	2020-02-19 05:52:11
2	Ingemar Ragnemalm	486	Pascal	2018-02-22 08:33:07
3	Vova Podkorytov	550	Pascal	2017-12-11 19:37:41
4	David Connolly	898	Pascal	2017-08-23 17:27:33

#	User	Length	Language	Date
1	陳建宏	408	PHP	2021-05-06 18:18:00
2	Steven D. Wilson	474	PHP	2016-11-28 03:25:18
3	cojonas1	495	PHP	2021-03-24 11:55:40
4	Renate	509	PHP	2021-04-13 03:22:00
5	Henry Kiame	554	PHP	2019-07-08 11:40:34
6	Andre Wahyudi	794	PHP	2023-03-16 02:59:26

#	User	Length	Language	Date
1	Andriy Zyevakov	268	Prolog	2017-12-16 00:04:05
2	Hakan Kjellerstrand	396	Prolog	2023-02-08 10:14:07
3	Hadi Qovaizi	3018	Prolog	2016-11-25 19:08:16

#	User	Length	Language	Date
1	Thomas Feld	195	Python 2	2019-08-19 15:43:39
2	Justin Su	243	Python 2	2017-09-22 14:09:48
3	Haggai Liu	251	Python 2	2017-01-13 07:27:05
4	Andreas Eisele	256	Python 2	2018-10-07 19:50:16
5	Lars Åström	256	Python 2	2018-10-09 14:49:55
6	Jesper Öqvist	258	Python 2	2018-10-20 11:30:06
7	Muzakhir Amanzholov	265	Python 2	2017-02-07 23:33:28
8	Johan Wind	267	Python 2	2018-03-20 18:09:26
9	Mustafa Serdar Şanlı	268	Python 2	2017-10-15 20:33:32
10	Johan Lyts	269	Python 2	2019-03-08 22:24:07

#	User	Length	Language	Date
1	Morten Clausen	153	Python 3	2022-10-21 15:34:07
2	Lawry Sorenson	164	Python 3	2023-07-05 18:33:56
3	I Coello	186	Python 3	2025-02-10 17:45:36
4	Thibault Raffaillac	191	Python 3	2020-01-23 21:49:12
5	Nguyên Khôi Đỗ	192	Python 3	2024-12-19 22:38:06
6	Tai Tze Kin	193	Python 3	2024-05-05 11:33:32
7	Ahmed Chamseddine	193	Python 3	2024-07-08 16:33:54
8	Sidharth Sundar	206	Python 3	2021-06-20 00:13:02
9	a_b__c	208	Python 3	2021-03-21 18:20:23
10	Christian Blumenthal	217	Python 3	2020-07-09 19:49:49

#	User	Length	Language	Date
1	Jinwoo Lee	536	Racket	2025-02-02 01:08:22

#	User	Length	Language	Date
1	Thomas Feld	131	Ruby	2022-11-15 10:42:05
2	Hidden user	242	Ruby	2018-10-16 19:04:04
3	Hidden user	242	Ruby	2019-02-27 17:56:29
4	Kellen Watt	277	Ruby	2016-10-29 19:35:40
5	Macdara mac an tSionnaigh	295	Ruby	2019-10-06 22:13:53
6	Erik Rydbert	300	Ruby	2016-08-04 13:40:01
7	Lim Ming Yean	306	Ruby	2018-11-23 13:15:27
8	Drew Wilson	307	Ruby	2023-05-30 17:21:57
9	Savvas Alexandrou	314	Ruby	2018-12-07 21:10:28
10	Joy Cantimbuhan	341	Ruby	2017-06-08 02:08:24

#	User	Length	Language	Date
1	Vincent Lagerros	367	Rust	2024-12-03 23:06:44
2	Thobias Larsen	620	Rust	2023-01-28 12:50:56
3	Hidden user	643	Rust	2018-11-05 14:17:37
4	Constantin Buruiana	661	Rust	2024-09-07 02:52:31
5	Laura Parkes	664	Rust	2022-08-26 20:57:35
6	Pizza Hut	677	Rust	2025-01-26 23:29:41
7	Hidden user	713	Rust	2022-11-30 22:18:16
8	Alexandr Last	716	Rust	2023-08-15 17:51:44
9	Pankajkumar Patro	726	Rust	2024-08-07 22:26:16
10	Kok Dith	734	Rust	2021-08-04 03:13:42

#	User	Length	Language	Date
1	Hidden user	442	Swift	2024-09-04 20:51:54

Solution running time distribution