Problem A
The Bus Card — Problem Statistics

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Submissions	3623
Accepted submissions	2831
Submission ratio	78.14%
Authors	1015
Full solves [?]	740
Full solve Ratio	72.91%

#	User	Score	Language	Date
1	Chenzhang Hu	100	Bash	2023-09-24 16:07:49
2	Thomas Feld	100	Bash	2023-09-27 09:33:47

#	User	Score	Language	Date
1	Marcus Salzer	100	Dart	2024-07-08 11:55:40

#	User	Score	Language	Date
1	Jacob Harris Cryer Kragh	100	F#	2022-11-23 19:02:31
2	Emil Boesgaard Nørbjerg	100	F#	2024-01-11 21:45:16
3	Ethan Woodrum	100	F#	2024-03-13 16:47:34
4	Laurits Brodal	100	F#	2024-04-17 11:47:00
5	Matthew Kennedy	100	F#	2025-11-20 16:03:25
6	Simon Egeberg Svarre	67	F#	2025-09-17 18:55:32

#	User	Score	Language	Date
1	sameerzaidi	67	Fortran	2024-12-19 16:53:50

#	User	Score	Language	Date
1	Norbert Voelker	100	Go	2022-08-23 14:20:19
2	Jimmy Nejtron	100	Go	2022-10-27 18:25:11
3	Hidden user	100	Go	2023-03-06 21:42:46
4	Joachim Borup	100	Go	2024-11-22 11:53:33
5	Johann Yvetot	100	Go	2025-07-30 17:57:31
6	Andriy Zyevakov	33	Go	2022-12-02 09:00:15

#	User	Score	Language	Date
1	Ng Tek In	100	Haskell	2022-09-04 19:44:09
2	Brent Yorgey	100	Haskell	2022-11-19 12:46:33
3	Charley Sheaffer	100	Haskell	2023-12-03 21:06:03
4	Rudy Matela	100	Haskell	2024-03-24 19:35:53
5	Ishan Sarode	100	Haskell	2024-04-16 08:22:31
6	hhgrapes	100	Haskell	2024-05-16 01:50:35
7	Steinar Simonnes	100	Haskell	2024-10-21 21:41:32
8	Vladislav Utkin	100	Haskell	2024-11-11 18:04:58
9	Shinji Koshida	100	Haskell	2024-12-27 14:45:09
10	C D	100	Haskell	2025-09-16 23:16:06

#	User	Score	Language	Date
1	Samuel Högfeldt	100	JavaScript (Node.js)	2022-08-04 09:07:49
2	Ben Rodkin	100	JavaScript (Node.js)	2022-10-11 22:40:32
3	Jakob Andersson	67	JavaScript (Node.js)	2023-01-23 05:30:40
4	Lisa Håkanson	67	JavaScript (Node.js)	2023-02-19 20:28:07

#	User	Score	Language	Date
1	Bjørn Chr. Soltvedt	100	JavaScript (SpiderMonkey)	2022-07-04 08:03:31
2	Christian Pilegaard Cederquist	100	JavaScript (SpiderMonkey)	2022-11-17 23:54:40
3	Zach Tschetter	100	JavaScript (SpiderMonkey)	2023-06-28 02:16:20
4	Jimmy Gustafsson	100	JavaScript (SpiderMonkey)	2024-07-15 00:18:27
5	Alexander Vestin	67	JavaScript (SpiderMonkey)	2022-10-16 20:20:21
6	CMP - Sullivan Sherwood	67	JavaScript (SpiderMonkey)	2024-12-11 19:25:02

#	User	Score	Language	Date
1	Danny Robinson	100	Julia	2023-11-19 07:13:53
2	Timothy Gaede	100	Julia	2025-09-22 02:37:00

#	User	Score	Language	Date
1	Bradley Richards	100	Kotlin	2023-03-09 17:26:00
2	Adam Rankin	100	Kotlin	2023-05-08 02:45:47
3	Carl Martin Rosenberg	100	Kotlin	2025-12-25 12:39:04

#	User	Score	Language	Date
1	Jinwoo Lee	100	Nim	2024-06-20 01:43:06

#	User	Score	Language	Date
1	Javier Gómez Díaz	100	Perl	2025-11-23 04:55:04

#	User	Score	Language	Date
1	Renate	100	PHP	2022-10-06 23:13:51
2	Marcus Kim	67	PHP	2024-04-09 17:25:31

#	User	Score	Language	Date
1	Hakan Kjellerstrand	100	Prolog	2023-01-17 09:09:21

#	User	Score	Language	Date
1	Johan Lyts	100	Python 2	2023-01-12 22:03:44

#	User	Score	Language	Date
1	Thomas Feld	100	Ruby	2022-12-19 13:32:16
2	Oleg Smelov	100	Ruby	2022-12-29 21:09:23
3	Chenzhang Hu	100	Ruby	2025-09-22 14:38:31
4	Matzuka	67	Ruby	2025-11-03 11:44:29
5	Mark Daniel Soriano	67	Ruby	2025-12-22 12:37:42

#	User	Score	Language	Date
1	Vemahk	100	Zig	2024-04-21 05:16:35

#	User	Runtime	Language	Date
1	Chenzhang Hu	0.01 s	Bash	2023-10-03 17:43:30
2	Thomas Feld	0.06 s	Bash	2023-09-27 09:33:47

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	C#	2022-10-17 12:34:28
2	Hidden user	0.02 s	C#	2022-10-27 15:51:57
3	Edward van der Vyver	0.02 s	C#	2022-10-28 09:17:21
4	Joshua Gerber	0.02 s	C#	2022-11-03 15:52:27
5	Harvey Emmerson	0.02 s	C#	2023-01-19 20:06:09
6	Lauran van Ekeren	0.04 s	C#	2023-06-08 14:00:27
7	Ignacio Iborra	0.04 s	C#	2023-10-03 12:54:55
8	Pablo García	0.04 s	C#	2023-10-05 21:23:55
9	Fer	0.04 s	C#	2023-10-05 22:48:22
10	Maxim Lopez	0.04 s	C#	2023-10-06 15:59:04

#	User	Runtime	Language	Date
1	Marcus Salzer	0.01 s	Dart	2024-07-08 11:55:40

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.03 s	F#	2022-11-23 19:02:31
2	Laurits Brodal	0.04 s	F#	2024-04-17 11:47:00
3	Ethan Woodrum	0.07 s	F#	2024-03-13 16:47:34
4	Matthew Kennedy	0.07 s	F#	2025-11-20 16:03:25
5	Emil Boesgaard Nørbjerg	0.08 s	F#	2024-01-11 21:45:16

#	User	Runtime	Language	Date
1	Joachim Borup	0.00 s	Go	2024-11-22 11:53:33
2	Johann Yvetot	0.00 s	Go	2025-07-30 17:57:31
3	Norbert Voelker	0.01 s	Go	2022-08-23 14:20:19
4	Jimmy Nejtron	0.02 s	Go	2022-10-27 18:25:11
5	Hidden user	0.02 s	Go	2023-03-06 21:42:46

#	User	Runtime	Language	Date
1	Ng Tek In	0.00 s	Haskell	2022-09-04 19:44:09
2	Brent Yorgey	0.00 s	Haskell	2022-11-19 12:46:33
3	Charley Sheaffer	0.00 s	Haskell	2023-12-03 21:06:03
4	Rudy Matela	0.00 s	Haskell	2024-03-24 19:35:53
5	Ishan Sarode	0.00 s	Haskell	2024-04-16 08:22:31
6	hhgrapes	0.00 s	Haskell	2024-05-16 01:50:35
7	Steinar Simonnes	0.00 s	Haskell	2024-10-21 21:41:32
8	Vladislav Utkin	0.00 s	Haskell	2024-11-11 18:04:58
9	Shinji Koshida	0.00 s	Haskell	2024-12-27 14:45:09
10	C D	0.00 s	Haskell	2025-09-16 23:16:06

#	User	Runtime	Language	Date
1	Guangyi Zhou	0.04 s	Java	2024-12-13 16:13:28
2	Hidden user	0.04 s	Java	2025-12-08 22:19:22
3	Jonathan Kasmir	0.04 s	Java	2025-12-09 16:28:14
4	failedagain	0.05 s	Java	2024-05-18 20:47:37
5	Ranjith M	0.06 s	Java	2022-10-07 20:56:47
6	Egil Skall	0.06 s	Java	2022-10-26 00:21:05
7	Sven Rönnbäck	0.06 s	Java	2022-12-11 00:09:35
8	Crystal Sharpe	0.06 s	Java	2023-01-14 20:27:30
9	Carl James Benitez	0.06 s	Java	2023-03-06 06:49:48
10	Justin Paule Navarez	0.06 s	Java	2023-03-06 07:04:01

#	User	Runtime	Language	Date
1	Samuel Högfeldt	0.08 s	JavaScript (Node.js)	2022-08-04 09:07:49
2	Ben Rodkin	0.08 s	JavaScript (Node.js)	2022-10-11 22:40:32

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.02 s	JavaScript (SpiderMonkey)	2022-07-04 08:03:31
2	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2022-11-17 23:54:40
3	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-07-15 00:18:27
4	Zach Tschetter	0.03 s	JavaScript (SpiderMonkey)	2023-06-28 02:16:20

#	User	Runtime	Language	Date
1	Timothy Gaede	0.39 s	Julia	2025-09-22 02:37:00
2	Danny Robinson	0.53 s	Julia	2023-11-19 07:13:53

#	User	Runtime	Language	Date
1	Bradley Richards	0.16 s	Kotlin	2023-03-09 17:26:00
2	Adam Rankin	0.16 s	Kotlin	2023-05-08 02:45:47
3	Carl Martin Rosenberg	0.20 s	Kotlin	2025-12-25 12:39:04

#	User	Runtime	Language	Date
1	Jinwoo Lee	0.00 s	Nim	2024-06-20 01:43:06

#	User	Runtime	Language	Date
1	Javier Gómez Díaz	0.02 s	Perl	2025-11-23 04:55:04

#	User	Runtime	Language	Date
1	Renate	0.01 s	PHP	2022-10-06 23:13:51

#	User	Runtime	Language	Date
1	Hakan Kjellerstrand	0.08 s	Prolog	2023-01-17 09:09:21

#	User	Runtime	Language	Date
1	Johan Lyts	0.02 s	Python 2	2023-01-13 15:07:17

#	User	Runtime	Language	Date
1	Christofer Ohlsson	0.04 s	Python 3	2022-07-03 18:18:27
2	Oskar Haarklou Veileborg	0.04 s	Python 3	2022-07-04 12:45:09
3	Daryll Ko	0.04 s	Python 3	2022-08-05 14:24:10
4	Lex Janssens	0.04 s	Python 3	2022-08-26 12:17:54
5	Iman Khodadi	0.04 s	Python 3	2022-08-30 08:07:41
6	Guillermo Hernández	0.04 s	Python 3	2022-08-30 08:48:13
7	Christian Mattsson	0.04 s	Python 3	2022-09-02 14:32:55
8	Pierre Baron	0.04 s	Python 3	2022-09-07 21:12:12
9	Nicholas Russell Saerang	0.04 s	Python 3	2022-09-20 17:22:54
10	Þórhallur Tryggvason	0.04 s	Python 3	2022-09-21 14:55:33

#	User	Runtime	Language	Date
1	Thomas Feld	0.06 s	Ruby	2022-12-19 13:32:16
2	Oleg Smelov	0.06 s	Ruby	2022-12-29 21:09:23
3	Chenzhang Hu	0.12 s	Ruby	2025-09-22 14:38:31

#	User	Runtime	Language	Date
1	Vemahk	0.00 s	Zig	2024-04-21 05:16:35

#	User	Length	Language	Date
1	Chenzhang Hu	35	Bash	2025-09-13 17:53:00
2	Thomas Feld	40	Bash	2023-09-27 09:33:47

#	User	Length	Language	Date
1	Leslie Yip	204	C	2022-09-06 15:06:52
2	Mikael K Eriksson	254	C	2022-08-30 07:58:50
3	Dave Lynch	326	C	2024-06-18 21:56:33
4	Ioannis Br	365	C	2022-11-08 16:08:35
5	Felix Salim	390	C	2023-10-20 06:03:18
6	Kasper Malmborg Rønne	391	C	2024-06-04 20:27:08
7	Rebecca Ekeroth	397	C	2023-10-19 18:32:05
8	Henrik Vendel	408	C	2022-11-29 18:56:19
9	Jeisson Hidalgo-Céspedes	412	C	2023-01-04 06:56:11
10	Alan Ksenzov	423	C	2025-01-06 14:46:18

#	User	Length	Language	Date
1	Henrik Hallbert	151	C#	2025-09-01 09:28:39
2	Michael Damsgaard	175	C#	2024-12-23 05:07:16
3	traxex	233	C#	2024-05-26 09:44:43
4	Frederik Jørgensen	282	C#	2023-11-21 11:15:28
5	Mtsbrr	422	C#	2023-10-18 22:58:08
6	Lauran van Ekeren	455	C#	2023-06-08 14:00:27
7	Asger Starup	513	C#	2024-04-08 09:59:12
8	Ignacio Iborra	526	C#	2023-10-03 12:54:55
9	Shandora Ventus	543	C#	2023-10-18 16:13:35
10	Natalia Alejandra Gutiérrez Echeverry	552	C#	2023-10-18 22:45:45

#	User	Length	Language	Date
1	Hidden user	102	C++	2024-11-25 11:31:12
2	Hidden user	128	C++	2025-01-03 16:05:13
3	Titus Chew	182	C++	2025-02-28 12:34:22
4	Katrin Köper	211	C++	2025-01-26 08:57:31
5	Nikola Stojkovski	219	C++	2022-07-28 10:09:56
6	William Li	219	C++	2024-07-02 05:43:46
7	Waitaya Krongapiradee	222	C++	2023-02-25 15:11:07
8	Mattia Marziali	223	C++	2023-11-25 16:49:01
9	Simon Paege	225	C++	2024-06-18 20:31:07
10	Radian Krisno	228	C++	2022-12-06 10:27:20

#	User	Length	Language	Date
1	Marcus Salzer	400	Dart	2024-07-08 11:55:40

#	User	Length	Language	Date
1	Ethan Woodrum	311	F#	2024-03-13 16:47:34
2	Matthew Kennedy	322	F#	2025-11-20 16:03:25
3	Jacob Harris Cryer Kragh	414	F#	2022-11-23 19:02:31
4	Laurits Brodal	423	F#	2024-04-17 11:47:00
5	Emil Boesgaard Nørbjerg	2249	F#	2024-01-11 21:45:16

#	User	Length	Language	Date
1	Joachim Borup	244	Go	2024-11-22 11:53:33
2	Hidden user	264	Go	2023-03-06 21:42:46
3	Johann Yvetot	396	Go	2025-07-30 17:57:31
4	Norbert Voelker	532	Go	2022-08-23 14:23:21
5	Jimmy Nejtron	578	Go	2022-10-27 18:25:11

#	User	Length	Language	Date
1	Brent Yorgey	92	Haskell	2022-11-19 12:52:12
2	Rudy Matela	107	Haskell	2024-03-24 19:39:06
3	hhgrapes	224	Haskell	2024-05-16 01:50:35
4	C D	237	Haskell	2025-09-16 23:16:06
5	Charley Sheaffer	273	Haskell	2023-12-03 21:06:03
6	Steinar Simonnes	437	Haskell	2024-10-21 21:41:32
7	Ishan Sarode	457	Haskell	2024-04-16 08:22:31
8	Shinji Koshida	531	Haskell	2024-12-27 14:45:09
9	Ng Tek In	626	Haskell	2022-09-04 19:44:09
10	Vladislav Utkin	1333	Haskell	2024-11-11 18:07:19

#	User	Length	Language	Date
1	Rasmus Poulsen	246	Java	2023-10-27 19:25:06
2	Crystal Sharpe	273	Java	2023-01-14 20:29:26
3	Andrea	369	Java	2023-09-08 23:20:58
4	Ian Mahendra Setiawan	371	Java	2025-01-04 14:27:24
5	Luke Eales	403	Java	2023-09-19 18:29:10
6	Brennan Cleland	425	Java	2023-05-11 21:45:13
7	Adam A	446	Java	2025-10-29 05:21:55
8	Kristóf Németh	455	Java	2025-10-01 10:56:35
9	Tan Zhang-Hng Ervin	498	Java	2024-09-20 09:16:43
10	Markus Bao	501	Java	2024-01-08 04:50:01

#	User	Length	Language	Date
1	Ben Rodkin	492	JavaScript (Node.js)	2022-10-11 22:40:32
2	Samuel Högfeldt	572	JavaScript (Node.js)	2022-08-04 09:07:49

#	User	Length	Language	Date
1	Jimmy Gustafsson	75	JavaScript (SpiderMonkey)	2024-07-15 00:18:27
2	Bjørn Chr. Soltvedt	258	JavaScript (SpiderMonkey)	2022-07-04 08:03:31
3	Christian Pilegaard Cederquist	291	JavaScript (SpiderMonkey)	2022-11-17 23:54:40
4	Zach Tschetter	545	JavaScript (SpiderMonkey)	2023-06-28 02:16:20

#	User	Length	Language	Date
1	Danny Robinson	73	Julia	2023-11-19 07:13:53
2	Timothy Gaede	304	Julia	2025-09-22 02:37:00

#	User	Length	Language	Date
1	Bradley Richards	297	Kotlin	2023-03-09 17:26:00
2	Adam Rankin	346	Kotlin	2023-05-08 02:45:47
3	Carl Martin Rosenberg	385	Kotlin	2025-12-25 12:39:04

#	User	Length	Language	Date
1	Jinwoo Lee	438	Nim	2024-06-20 01:43:06

#	User	Length	Language	Date
1	Javier Gómez Díaz	127	Perl	2025-11-23 04:55:04

#	User	Length	Language	Date
1	Renate	264	PHP	2022-10-06 23:13:51

#	User	Length	Language	Date
1	Hakan Kjellerstrand	1564	Prolog	2023-01-17 09:09:21

#	User	Length	Language	Date
1	Johan Lyts	71	Python 2	2023-01-13 21:30:05

#	User	Length	Language	Date
1	Eduardo Vicente Petry	46	Python 3	2023-01-26 22:45:28
2	Benjamin Z White	46	Python 3	2023-05-11 11:46:28
3	Clement Oh	48	Python 3	2023-06-17 10:06:47
4	Hidden user	55	Python 3	2024-11-25 11:52:22
5	June Hoop	59	Python 3	2024-08-19 10:42:43
6	Lee Isaac	62	Python 3	2022-11-09 20:22:39
7	Sarek Høverstad Skotåm	65	Python 3	2022-10-01 22:43:14
8	Hu Yijie	66	Python 3	2023-04-30 17:29:45
9	Wilmer Ansgariusson	67	Python 3	2024-09-26 17:41:00
10	Jonathan Ståhl	68	Python 3	2024-09-26 17:46:29

#	User	Length	Language	Date
1	Thomas Feld	36	Ruby	2023-01-30 09:08:36
2	Chenzhang Hu	134	Ruby	2025-09-22 14:38:31
3	Oleg Smelov	221	Ruby	2022-12-29 21:09:23

#	User	Length	Language	Date
1	Artur Khuziakhmetov	273	Rust	2023-08-14 14:40:05
2	Emberlynn McKinney	424	Rust	2025-12-31 06:25:35
3	David Rasch	472	Rust	2022-10-05 14:45:11
4	Vincent Lagerros	645	Rust	2024-09-02 11:29:51
5	Rico Krouweel	745	Rust	2023-05-22 10:31:32
6	Jason Hooper	773	Rust	2022-07-04 19:34:38
7	Jeffrey Adair	1018	Rust	2023-11-04 23:17:18
8	Andreas Gottschalk Krath	1299	Rust	2023-10-06 15:02:14
9	Bas Dirks	1788	Rust	2022-12-01 07:07:12
10	Isak Jägberg	2307	Rust	2023-03-23 09:46:02

#	User	Length	Language	Date
1	Vemahk	1424	Zig	2024-04-21 05:16:35

Solution running time distribution