Problem A
Bus Numbers — Problem Statistics

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Submissions	21397
Accepted submissions	8277
Submission ratio	38.68%
Authors	6686
Accepted authors	5858
Author ratio	87.62%

#	User	Runtime	Language	Date
1	Carl Svensson	0.02 s	C#	2013-03-31 15:53:28
2	Ivan Joukov	0.02 s	C#	2013-09-06 22:14:35
3	Adam Czerski	0.02 s	C#	2013-09-24 21:43:17
4	Timur Fayzrakhmanov	0.02 s	C#	2014-07-11 17:50:24
5	grabarz	0.02 s	C#	2014-09-21 11:16:37
6	Bryan Shiffman	0.02 s	C#	2014-09-27 19:32:30
7	Ayk Stepanyan	0.02 s	C#	2014-10-07 21:44:09
8	masosz	0.02 s	C#	2015-01-21 19:38:19
9	Tommy Ivarsson	0.02 s	C#	2015-04-15 14:58:54
10	Bas te Kolste	0.02 s	C#	2015-06-21 00:57:32

#	User	Runtime	Language	Date
1	David Cawthon	0.01 s	Common Lisp	2020-12-03 03:26:29

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.08 s	F#	2023-01-28 10:56:04

#	User	Runtime	Language	Date
1	Arunangshu Biswas	0.01 s	Go	2023-09-17 08:12:23
2	Tim Bergbom	0.01 s	Go	2024-04-23 18:24:52
3	Abhinav Sasikumar	0.02 s	Go	2023-03-25 15:50:14
4	Adam Engsig	0.02 s	Go	2023-05-11 11:04:09
5	Krzysztof Gibuła	0.07 s	Go	2019-03-09 18:34:47
6	Péter Szakszon	0.07 s	Go	2021-12-24 12:17:34
7	Anthony Alves	0.08 s	Go	2017-01-22 05:44:35
8	James Robb	0.08 s	Go	2020-05-12 11:53:45
9	Lucas Dow	0.08 s	Go	2020-09-15 21:06:06
10	Matt Steen	0.08 s	Go	2020-10-27 22:03:45

#	User	Runtime	Language	Date
1	David Wärn	0.00 s	Haskell	2015-10-09 14:05:11
2	Gustav Hedengran	0.00 s	Haskell	2017-02-07 21:36:10
3	César Antonio Carvajal de la Haza	0.00 s	Haskell	2017-03-22 12:39:36
4	Consuelo Gómez Gómez	0.00 s	Haskell	2017-04-22 21:45:26
5	Emil Jonsson	0.00 s	Haskell	2017-05-15 17:17:08
6	Morten Lohne	0.00 s	Haskell	2017-10-21 03:15:00
7	Azeez Daoud	0.00 s	Haskell	2022-07-21 15:08:11
8	Hidden user	0.01 s	Haskell	2014-12-11 00:28:47
9	Hidden user	0.01 s	Haskell	2014-12-29 14:50:50
10	Markus Läll	0.01 s	Haskell	2015-02-12 11:28:12

#	User	Runtime	Language	Date
1	Mohanad Magdi Mohamed	0.04 s	Java	2024-09-17 10:41:36
2	Guangyi Zhou	0.04 s	Java	2024-12-12 13:43:01
3	Samuel Klingström	0.05 s	Java	2017-05-09 19:18:58
4	Jay Prakash Mahto	0.05 s	Java	2017-09-13 18:01:09
5	Bassam Alfarhan	0.05 s	Java	2024-11-01 23:57:09
6	Hidden user	0.05 s	Java	2025-03-11 05:52:11
7	Bougaïeff-Emmanuel Alcéus	0.05 s	Java	2025-03-11 18:57:20
8	Alexander Rudal	0.05 s	Java	2025-04-30 21:29:27
9	Jens Ståhl	0.06 s	Java	2012-02-22 17:20:55
10	Simon Klein	0.06 s	Java	2012-02-22 17:27:22

#	User	Runtime	Language	Date
1	Christoffer Karlsson	0.06 s	JavaScript (Node.js)	2018-07-21 17:54:10
2	Calvin Watford	0.06 s	JavaScript (Node.js)	2018-09-08 08:21:00
3	福井悠希	0.06 s	JavaScript (Node.js)	2018-09-09 11:04:26
4	Jerry Hu	0.06 s	JavaScript (Node.js)	2019-02-01 19:05:37
5	Sander Hellesø	0.06 s	JavaScript (Node.js)	2019-04-16 01:54:18
6	Hidden user	0.08 s	JavaScript (Node.js)	2022-10-13 12:46:44
7	your MOM	0.09 s	JavaScript (Node.js)	2022-12-26 09:48:34
8	Angelou Konstantinos	0.09 s	JavaScript (Node.js)	2023-06-09 14:32:53
9	Ster Sar	0.09 s	JavaScript (Node.js)	2023-06-10 12:12:16

#	User	Runtime	Language	Date
1	Piotr Karpala	0.01 s	JavaScript (SpiderMonkey)	2015-08-08 00:38:38
2	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2015-12-20 21:05:10
3	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-01-29 01:24:24
4	Hà Minh Ngọc	0.01 s	JavaScript (SpiderMonkey)	2016-08-08 17:47:19
5	Tor Nordqvist	0.01 s	JavaScript (SpiderMonkey)	2016-11-16 11:32:51
6	Johannes Tomasson	0.01 s	JavaScript (SpiderMonkey)	2017-02-22 06:31:13
7	Spencer Smith	0.01 s	JavaScript (SpiderMonkey)	2017-06-17 04:24:50
8	Paul Leung	0.01 s	JavaScript (SpiderMonkey)	2017-08-31 18:47:01
9	Christian Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-02-05 09:32:34
10	Zach Tschetter	0.02 s	JavaScript (SpiderMonkey)	2023-06-15 03:25:13

#	User	Runtime	Language	Date
1	Noszály Csaba	0.46 s	Julia	2025-04-12 21:55:51
2	Timothy Gaede	0.56 s	Julia	2024-04-05 04:34:46

#	User	Runtime	Language	Date
1	Benjamin Sølvberg Buan	0.14 s	Kotlin	2020-10-06 20:58:56
2	Thanh Le	0.14 s	Kotlin	2021-07-13 20:39:31
3	Nicholas Johnson	0.15 s	Kotlin	2021-05-07 21:42:20
4	Kasper Ingelvide	0.16 s	Kotlin	2020-10-30 17:22:30
5	Johnny Baloney	0.16 s	Kotlin	2022-01-14 16:01:28
6	Jacob Huebner	0.18 s	Kotlin	2020-03-17 02:04:13
7	Adam Rankin	0.19 s	Kotlin	2023-05-09 18:54:02
8	Aldinata	0.20 s	Kotlin	2020-12-04 11:42:04
9	Jesper Lundholm	0.21 s	Kotlin	2017-10-28 15:36:39
10	Dayan Ruben Gonzalez	0.21 s	Kotlin	2020-09-30 02:35:23

#	User	Runtime	Language	Date
1	Caleb Austin	0.00 s	Lua	2024-08-23 23:09:31

#	User	Runtime	Language	Date
1	Marcel Goh	0.00 s	OCaml	2019-11-01 20:04:27
2	Joel Newman	0.00 s	OCaml	2023-09-06 23:03:45

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2017-08-17 10:39:31
2	Egor Shchetinin	0.00 s	Pascal	2018-02-12 19:11:14
3	Vova Podkorytov	0.00 s	Pascal	2018-02-12 19:12:08
4	Dũ Quốc Huy	0.00 s	Pascal	2019-07-24 10:17:05

#	User	Runtime	Language	Date
1	Johan Li	0.01 s	PHP	2015-03-28 16:49:55
2	Silvena Lam	0.01 s	PHP	2017-07-05 20:32:07
3	Susanne Ragnemalm	0.01 s	PHP	2018-05-23 10:08:05
4	Григорий Бирюк	0.01 s	PHP	2019-05-21 12:44:25
5	Hidden user	0.01 s	PHP	2019-05-21 14:12:31
6	Jakob Råhlén	0.01 s	PHP	2020-03-21 20:26:20

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Prolog	2017-02-04 13:02:24
2	Hidden user	0.01 s	Prolog	2017-02-28 22:36:55
3	Alfred Andersson	0.01 s	Prolog	2018-03-26 07:08:00
4	Andriy Zyevakov	0.02 s	Prolog	2016-11-25 12:21:11
5	Jonas Nockert	0.02 s	Prolog	2016-12-08 01:04:25
6	Marcus Östling	0.02 s	Prolog	2016-12-16 09:36:43
7	Rasmus Berggrén	0.02 s	Prolog	2016-12-21 20:36:53
8	Jesper Lundholm	0.02 s	Prolog	2016-12-30 01:15:25
9	Philip Strömberg	0.02 s	Prolog	2017-01-19 08:13:25
10	Gustav Hedengran	0.02 s	Prolog	2017-02-07 17:46:15

#	User	Runtime	Language	Date
1	Oskar Werkelin Ahlin	0.03 s	Python 2	2012-03-30 19:38:11
2	Carl Svensson	0.03 s	Python 2	2012-09-26 02:43:17
3	Jakob Bergendahl	0.03 s	Python 2	2013-11-12 17:04:09
4	Viktor Holmberg	0.03 s	Python 2	2013-11-12 17:16:43
5	Alexander Bethke	0.03 s	Python 2	2013-11-12 17:35:24
6	Alex Bright	0.03 s	Python 2	2014-10-04 23:49:35
7	Jacob Wejendorp	0.03 s	Python 2	2014-12-01 20:35:28
8	Gustaf Waldemarson	0.03 s	Python 2	2014-12-07 17:28:14
9	John Rikard Mienna	0.03 s	Python 2	2014-12-18 01:34:32
10	Nicolaj Nielsen	0.03 s	Python 2	2014-12-21 23:34:02

#	User	Runtime	Language	Date
1	Carl Svensson	0.02 s	Python 3	2013-03-31 16:30:23
2	Hidden user	0.02 s	Python 3	2013-10-08 20:18:16
3	Josh Glover	0.02 s	Python 3	2013-11-12 17:24:43
4	Francisco Couzo	0.02 s	Python 3	2014-10-27 06:22:20
5	Kristian Elset Bø	0.02 s	Python 3	2014-12-23 13:16:53
6	Kristian Elset Bø	0.02 s	Python 3	2014-12-23 13:30:26
7	Irena Zajc	0.02 s	Python 3	2015-02-23 14:26:38
8	Brian Harrington	0.02 s	Python 3	2015-02-23 15:40:59
9	Hlynur “Glitch” Óskar Guðmundsson	0.02 s	Python 3	2015-02-26 23:22:39
10	Martin Stensgård	0.02 s	Python 3	2015-03-14 02:49:25

#	User	Runtime	Language	Date
1	Casper Christensen	0.03 s	Ruby	2016-02-23 11:40:07
2	Gerry Hall	0.03 s	Ruby	2016-03-16 07:21:26
3	Erik Rydbert	0.03 s	Ruby	2016-07-20 10:00:35
4	Kevin Suwala	0.03 s	Ruby	2017-01-13 05:05:24
5	Hidden user	0.04 s	Ruby	2019-02-18 15:51:34
6	Olivia Bednar	0.04 s	Ruby	2019-09-21 01:46:10
7	Patricia Gao	0.05 s	Ruby	2020-01-23 15:33:23
8	Martin Larsson	0.05 s	Ruby	2020-03-16 22:41:47
9	Sujay Vadlakonda	0.05 s	Ruby	2021-05-01 20:06:31
10	Patrick Elsen	0.06 s	Ruby	2019-04-26 19:00:11

#	User	Runtime	Language	Date
1	Joe Blower	0.00 s	Zig	2025-05-20 08:47:09

#	User	Length	Language	Date
1	Jonatan Altebro	348	C	2025-04-01 19:18:35
2	Thibault Raffaillac	421	C	2016-12-12 17:34:18
3	Nhật Anh Võ Nguyễn	523	C	2016-03-02 03:00:42
4	Jonas Höglund	582	C	2014-01-05 16:15:17
5	Hidden user	586	C	2023-11-24 17:45:33
6	Santhosh Bhattaram	599	C	2016-09-21 09:41:01
7	Hidden user	606	C	2016-09-25 06:44:44
8	Anton Lyxell	609	C	2017-09-24 04:06:56
9	pengin	609	C	2021-05-18 12:12:51
10	官毓韋	617	C	2017-12-01 07:15:53

#	User	Length	Language	Date
1	Esty Crow	739	C#	2023-06-10 01:44:18
2	Anthony Ye	790	C#	2023-06-11 18:00:49
3	Thomas Norris	828	C#	2019-06-24 09:46:13
4	Ugnius Skučas	850	C#	2016-10-09 19:15:35
5	Marcellus Mohanna	926	C#	2020-05-08 20:49:54
6	Maxence Roy	934	C#	2020-05-07 01:16:26
7	Carson Price	978	C#	2021-06-24 23:56:00
8	Nirajan Karki	1004	C#	2022-11-03 16:38:10
9	Khin Nyunt	1023	C#	2016-04-17 10:39:25
10	Andreas Kongstad	1040	C#	2023-01-26 22:00:30

#	User	Length	Language	Date
1	Tim Bergbom	227	C++	2024-04-16 22:26:20
2	son le thanh	336	C++	2020-11-18 09:03:47
3	Ogbonna Chibuoyim	347	C++	2019-06-12 23:06:54
4	Nguyễn Công Cường	350	C++	2019-07-24 09:24:30
5	Fabrizio Brioni	351	C++	2017-03-02 19:32:05
6	Wei Liang Tan	351	C++	2019-05-23 05:24:53
7	Eduardo Sebastián Castro Quispe	354	C++	2023-03-30 21:52:34
8	Ivan D. Pupovac	356	C++	2017-12-05 21:11:27
9	Afrae Bouzgoura	367	C++	2020-10-14 00:04:45
10	Á Cường	370	C++	2017-09-21 18:33:29

#	User	Length	Language	Date
1	David Cawthon	920	Common Lisp	2020-12-03 03:26:29

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	935	F#	2023-01-28 10:56:04

#	User	Length	Language	Date
1	Tim Bergbom	268	Go	2024-04-23 18:32:00
2	Rickard Bemm	437	Go	2022-09-06 22:32:26
3	Hussein Al Abry	671	Go	2017-02-28 23:29:51
4	Erik Rairden	749	Go	2021-07-11 10:42:23
5	Matt Steen	762	Go	2020-10-27 22:03:45
6	Aurélien Brabant	768	Go	2020-11-07 21:39:31
7	Bassam Alfarhan	781	Go	2013-04-01 02:38:30
8	Arunangshu Biswas	790	Go	2023-09-17 08:12:23
9	Adrian Bay Dorph	793	Go	2021-09-10 21:25:17
10	Norbert Voelker	802	Go	2021-07-22 00:36:34

#	User	Length	Language	Date
1	Theodor Ström	204	Haskell	2023-02-28 12:42:38
2	Mathias Magnusson	212	Haskell	2023-03-29 12:44:42
3	Birk Tjelmeland	317	Haskell	2017-08-05 17:52:29
4	Mattias Kvist	327	Haskell	2024-02-28 22:45:53
5	Vincent Lagerros	337	Haskell	2023-04-04 10:03:44
6	David Wärn	344	Haskell	2015-10-09 14:05:11
7	Emil Gestsson	443	Haskell	2022-03-08 14:05:02
8	Natalie Axelsson	471	Haskell	2016-12-07 20:31:12
9	Victor Hernadi	474	Haskell	2023-04-13 00:24:48
10	David Avellan-Hultman	478	Haskell	2020-02-19 13:30:14

#	User	Length	Language	Date
1	Doug Goodman	519	Java	2017-03-17 19:48:11
2	Mattias Kvist	554	Java	2024-02-28 22:05:40
3	Fred Zhang	579	Java	2017-02-14 04:01:56
4	Kezang Choden	588	Java	2021-04-22 08:40:50
5	Jordan Lamkin	607	Java	2017-01-20 23:20:29
6	Wang Zhi Jian	609	Java	2018-08-16 13:19:09
7	Lucy Reynolds	613	Java	2015-10-09 01:52:56
8	Hidden user	617	Java	2017-02-02 18:25:40
9	Mouhssine Assaoud	621	Java	2017-02-02 18:21:14
10	Frank Ruskey	623	Java	2018-02-18 00:57:56

#	User	Length	Language	Date
1	Tamás Bögi	693	JavaScript (Node.js)	2020-12-04 14:46:38
2	Calvin Watford	792	JavaScript (Node.js)	2018-09-08 08:21:00
3	Christoffer Karlsson	986	JavaScript (Node.js)	2018-07-21 17:54:10
4	Stephanie Keck	988	JavaScript (Node.js)	2020-01-18 00:04:13
5	Kevin Ma	1053	JavaScript (Node.js)	2020-06-30 03:20:41
6	Oscar Melin	1058	JavaScript (Node.js)	2021-04-18 21:38:16
7	Ster Sar	1072	JavaScript (Node.js)	2023-06-10 12:12:16
8	Hovhannes Kantuni	1117	JavaScript (Node.js)	2021-03-17 00:39:09

#	User	Length	Language	Date
1	Jimmy Gustafsson	217	JavaScript (SpiderMonkey)	2025-07-13 10:44:07
2	Christian Cederquist	450	JavaScript (SpiderMonkey)	2023-02-05 09:32:34
3	Tor Nordqvist	492	JavaScript (SpiderMonkey)	2016-11-16 11:32:51
4	Peter Kedemo	518	JavaScript (SpiderMonkey)	2015-12-20 21:05:10
5	Spencer Smith	533	JavaScript (SpiderMonkey)	2017-06-17 04:24:50
6	Paul Leung	597	JavaScript (SpiderMonkey)	2017-08-31 18:47:01
7	Davíð Helgason	622	JavaScript (SpiderMonkey)	2019-06-20 23:24:18
8	Hà Minh Ngọc	636	JavaScript (SpiderMonkey)	2016-08-08 17:47:19
9	Zach Tschetter	646	JavaScript (SpiderMonkey)	2023-06-15 03:25:13
10	Johannes Strelen	651	JavaScript (SpiderMonkey)	2018-12-06 10:16:41

#	User	Length	Language	Date
1	Noszály Csaba	195	Julia	2025-04-12 22:38:21
2	Timothy Gaede	582	Julia	2024-04-05 04:34:46

#	User	Length	Language	Date
1	Yang Tang	520	Kotlin	2023-07-27 06:57:34
2	Dhoomil Sheta	545	Kotlin	2018-11-17 12:49:29
3	Dayan Ruben Gonzalez	567	Kotlin	2020-09-30 02:35:23
4	Chris Johnson	575	Kotlin	2023-10-03 00:09:26
5	Adam Koprowski	608	Kotlin	2020-09-08 10:07:52
6	Kelly Dance	670	Kotlin	2022-09-25 01:37:34
7	Sergey Jakobsen	688	Kotlin	2021-06-12 21:14:58
8	Anders B. Clausen	735	Kotlin	2020-10-27 23:21:06
9	Jesper Lundholm	786	Kotlin	2017-10-28 15:36:39
10	Dmitry Shostak	798	Kotlin	2018-08-18 18:39:50

#	User	Length	Language	Date
1	Caleb Austin	991	Lua	2024-08-23 23:09:31

#	User	Length	Language	Date
1	Joel Newman	1031	OCaml	2023-09-06 23:03:45
2	Marcel Goh	1193	OCaml	2019-11-01 20:04:27

#	User	Length	Language	Date
1	Egor Shchetinin	511	Pascal	2018-02-12 19:11:14
2	Vova Podkorytov	554	Pascal	2018-02-12 19:12:08
3	Dũ Quốc Huy	1306	Pascal	2019-07-24 10:17:05
4	Ingemar Ragnemalm	2178	Pascal	2017-08-17 10:39:31

#	User	Length	Language	Date
1	Silvena Lam	583	PHP	2017-07-05 20:32:07
2	Johan Li	721	PHP	2015-03-28 16:49:55
3	Григорий Бирюк	1056	PHP	2019-05-21 12:44:25
4	Hidden user	1056	PHP	2019-05-21 14:12:31
5	Susanne Ragnemalm	1269	PHP	2018-05-23 10:08:05
6	Jakob Råhlén	1325	PHP	2020-03-21 20:26:20

#	User	Length	Language	Date
1	David Aldenbro	688	Prolog	2023-03-25 21:08:27
2	Hidden user	728	Prolog	2025-04-19 01:59:28
3	Andriy Zyevakov	859	Prolog	2016-11-25 12:21:11
4	Xindi Liu	1070	Prolog	2020-04-18 19:08:03
5	Aron Granberg	1267	Prolog	2017-05-22 12:40:01
6	Hidden user	1337	Prolog	2025-04-17 20:09:27
7	Ludvig Gunne Lindström	1351	Prolog	2025-02-03 15:12:35
8	André Brogärd	1456	Prolog	2019-05-16 14:45:00
9	Erik Hedlund	1466	Prolog	2021-02-16 23:50:08
10	Linus Ringvall	1646	Prolog	2019-04-01 22:42:35

#	User	Length	Language	Date
1	Thomas Feld	210	Python 2	2019-08-16 13:41:03
2	Neal Zane	271	Python 2	2016-01-14 16:34:32
3	Asger Hautop Drewsen	276	Python 2	2015-11-05 11:47:28
4	Tore Norderud	331	Python 2	2015-07-18 17:09:18
5	Tudor Brindus	356	Python 2	2016-09-18 22:25:58
6	Yan Kalchevsky	360	Python 2	2017-01-15 23:40:45
7	Snild Dolkow	365	Python 2	2015-10-03 22:16:21
8	Alfredo Beaumont	368	Python 2	2017-08-04 14:19:23
9	Andreas Björklund	373	Python 2	2019-04-14 20:01:22
10	Haggai Liu	374	Python 2	2017-06-21 07:35:00

#	User	Length	Language	Date
1	Emma Ericsson	147	Python 3	2025-07-08 05:15:59
2	Simon Lindbäck	165	Python 3	2022-11-24 01:32:00
3	Henri Lemoine	166	Python 3	2022-09-12 03:31:28
4	Gustav Elmqvist	176	Python 3	2023-02-13 17:57:50
5	Ahmed Chamseddine	231	Python 3	2024-08-17 10:39:19
6	Charles Ancheta	233	Python 3	2023-03-24 10:51:35
7	Andrew Mackenzie	237	Python 3	2022-09-07 06:37:42
8	Ivar Boqvist	252	Python 3	2024-02-22 00:42:04
9	Isaac Erdman	254	Python 3	2025-03-28 01:52:46
10	Magnus Hokland Hegdahl	256	Python 3	2023-11-16 01:04:32

#	User	Length	Language	Date
1	Thomas Feld	88	Ruby	2023-02-14 13:39:55
2	Frederik Spang	92	Ruby	2023-02-12 13:53:22
3	Andreas Severin Hauch Trøstrup	92	Ruby	2023-02-12 13:57:30
4	Erik Rydbert	361	Ruby	2016-07-20 10:00:35
5	Hidden user	373	Ruby	2019-02-18 15:51:34
6	Olivia Bednar	381	Ruby	2019-09-21 01:46:10
7	Martin Larsson	406	Ruby	2020-03-16 22:41:47
8	Michael Go	407	Ruby	2024-05-25 04:43:18
9	Gerry Hall	418	Ruby	2016-03-16 07:21:26
10	Casper Christensen	434	Ruby	2016-02-23 11:40:07

#	User	Length	Language	Date
1	Vincent Lagerros	372	Rust	2023-02-22 16:33:48
2	Azeez Daoud	444	Rust	2023-03-16 20:19:11
3	Hidden user	758	Rust	2024-06-30 19:01:13
4	Owen Seary	783	Rust	2024-09-19 19:21:16
5	Stephen Downward	840	Rust	2020-11-16 18:42:27
6	Sofiane	861	Rust	2024-11-05 22:30:42
7	Robert Janczewski	866	Rust	2020-02-08 00:51:07
8	Jakob Cetti Hansen	869	Rust	2020-10-22 19:37:45
9	Tim Bergbom	944	Rust	2024-04-23 20:05:01
10	Simon Jutvreten	957	Rust	2025-04-15 14:48:06

#	User	Length	Language	Date
1	Joe Blower	1865	Zig	2025-05-20 08:47:09

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