Problem A
CPR Number — Problem Statistics

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Submissions	5137
Accepted submissions	2861
Submission ratio	55.69%
Authors	2695
Full solves [?]	2575
Full solve Ratio	95.55%

#	User	Runtime	Language	Date
1	Steve Allen	0.01 s	APL	2023-05-13 08:59:18
2	Thomas Feld	0.01 s	APL	2023-05-15 09:25:47
3	JackTheEgg	0.01 s	APL	2023-07-08 00:08:41
4	Max NC	0.01 s	APL	2023-09-12 00:05:09
5	Matzuka	0.01 s	APL	2025-04-02 15:00:51

#	User	Runtime	Language	Date
1	Chenzhang Hu	0.07 s	Bash	2023-12-27 16:56:53

#	User	Runtime	Language	Date
1	GraViX	0.02 s	C#	2021-04-23 16:43:18
2	Mikael Fiala-Lundström	0.02 s	C#	2022-02-19 22:25:54
3	Daniel Juhl	0.02 s	C#	2022-02-25 17:01:19
4	Benny Antonsson	0.02 s	C#	2022-02-28 22:37:14
5	Victor Hultén Mattsson	0.02 s	C#	2022-03-01 11:07:01
6	Karoline Øijorden	0.02 s	C#	2022-03-03 08:23:19
7	Kristian Sørensen	0.02 s	C#	2022-03-22 23:05:08
8	Fabian	0.02 s	C#	2022-03-23 20:10:52
9	Julius Reiter	0.02 s	C#	2022-03-23 20:30:44
10	Kevin Miranda	0.02 s	C#	2022-03-25 14:40:17

#	User	Runtime	Language	Date
1	David Karguth	0.00 s	COBOL	2022-08-25 08:00:36
2	Tobias Glimmerfors	0.00 s	COBOL	2023-08-15 20:45:52

#	User	Runtime	Language	Date
1	CharsKun	0.01 s	Dart	2023-05-26 08:39:09

#	User	Runtime	Language	Date
1	Victor Rasmussen	0.03 s	F#	2022-09-23 17:58:02
2	Tim Mondorf	0.04 s	F#	2022-02-25 16:27:02
3	Jacob Harris Cryer Kragh	0.04 s	F#	2022-06-01 20:05:46
4	Jacob To	0.06 s	F#	2023-11-14 17:20:42
5	Elias Smedegaard	0.07 s	F#	2023-11-17 13:19:06

#	User	Runtime	Language	Date
1	King Lawrence L. Caubalejo	0.00 s	Go	2023-07-09 01:15:01
2	Peter Dinning	0.00 s	Go	2023-09-27 18:00:07
3	Diego Saldias	0.00 s	Go	2023-10-27 17:23:08
4	Suka Isnaini	0.00 s	Go	2023-12-10 17:29:12
5	Auwais	0.00 s	Go	2024-11-07 19:23:16
6	Siona Beaudoin	0.00 s	Go	2025-03-12 21:48:59
7	Yafet Seyoum	0.00 s	Go	2025-03-20 16:42:15
8	Marcus Henrik Simonsen	0.00 s	Go	2025-10-16 12:26:03
9	Jeroen Jongkees	0.02 s	Go	2022-08-13 22:55:56
10	Alexis Romero	0.02 s	Go	2022-08-26 12:58:15

#	User	Runtime	Language	Date
1	Adrian Borup	0.04 s	Java	2024-10-27 20:05:32
2	Goh Zhixuan Jeremiah	0.04 s	Java	2025-02-07 21:09:14
3	Markus Bao	0.04 s	Java	2025-09-09 06:06:54
4	Lee Heng Sheng	0.05 s	Java	2024-04-17 07:11:42
5	Luna Quist Poulsen	0.05 s	Java	2024-06-18 16:51:42
6	Albert Rise Nielsen	0.06 s	Java	2021-04-23 16:19:50
7	Hidden user	0.06 s	Java	2021-04-23 16:48:10
8	Sven Rönnbäck	0.06 s	Java	2022-02-21 20:35:51
9	Crystal Sharpe	0.06 s	Java	2022-02-22 04:44:58
10	Ryan Tan	0.06 s	Java	2022-02-22 07:06:39

#	User	Runtime	Language	Date
1	Yassin Swag	0.04 s	JavaScript (Node.js)	2023-12-01 10:42:28
2	Athergaming	0.05 s	JavaScript (Node.js)	2023-10-13 09:06:17
3	Christopher Churchwell	0.05 s	JavaScript (Node.js)	2023-11-24 16:40:02
4	Faisal Rahman	0.05 s	JavaScript (Node.js)	2024-01-31 06:38:35
5	Hidden user	0.05 s	JavaScript (Node.js)	2024-07-05 07:06:40
6	Klemen Randl	0.08 s	JavaScript (Node.js)	2022-07-07 19:03:33
7	Antti Ellilä	0.08 s	JavaScript (Node.js)	2023-02-04 00:22:36
8	John	0.09 s	JavaScript (Node.js)	2022-07-15 04:17:14
9	Hidden user	0.09 s	JavaScript (Node.js)	2023-02-27 15:03:15
10	Sokol Kosta	0.09 s	JavaScript (Node.js)	2023-02-27 15:08:28

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.02 s	JavaScript (SpiderMonkey)	2022-02-19 13:46:06
2	Tyler VanHaren	0.02 s	JavaScript (SpiderMonkey)	2022-06-04 18:32:47
3	Håkan Lindahl	0.02 s	JavaScript (SpiderMonkey)	2022-06-15 17:23:35
4	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2022-06-23 14:47:39
5	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2022-11-03 22:06:04
6	Nicklas Utgaard	0.02 s	JavaScript (SpiderMonkey)	2022-12-30 20:26:42
7	Zach Tschetter	0.02 s	JavaScript (SpiderMonkey)	2023-06-23 23:08:57
8	Evan Magill	0.02 s	JavaScript (SpiderMonkey)	2024-04-13 05:26:43
9	Ben Armstrong	0.02 s	JavaScript (SpiderMonkey)	2025-08-11 15:34:07

#	User	Runtime	Language	Date
1	Timothy Gaede	0.57 s	Julia	2024-03-20 10:13:24
2	Danny Robinson	0.73 s	Julia	2023-09-01 02:37:29

#	User	Runtime	Language	Date
1	Ola Sundell	0.16 s	Kotlin	2022-02-21 16:03:43
2	Thobias Larsen	0.17 s	Kotlin	2022-05-26 10:15:45
3	Emil Wihlander	0.18 s	Kotlin	2023-05-08 22:28:54
4	Troels Bjerre Lund	0.19 s	Kotlin	2022-03-27 19:56:22
5	Troy Warmboe	0.19 s	Kotlin	2023-04-10 22:39:27
6	Preston Thomas	0.19 s	Kotlin	2023-08-06 08:50:32
7	Sergey Jakobsen	0.20 s	Kotlin	2022-02-24 00:35:45
8	Zaw Myat	0.20 s	Kotlin	2024-02-03 22:18:43
9	Martijn Muijsers	0.20 s	Kotlin	2024-05-28 10:03:48
10	Magnus Tønnessen	0.22 s	Kotlin	2022-05-13 13:28:48

#	User	Runtime	Language	Date
1	Hovig Manjikian	0.00 s	OCaml	2022-04-30 01:34:08

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Odin	2025-04-30 02:28:34

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2022-02-21 20:23:06
2	David Connolly	0.00 s	Pascal	2022-04-04 19:52:49

#	User	Runtime	Language	Date
1	Saito Ta	0.01 s	Perl	2024-04-08 12:44:15

#	User	Runtime	Language	Date
1	Renate Fiala-Lundström	0.01 s	PHP	2022-03-17 01:18:32
2	Nick Hargrove	0.01 s	PHP	2022-05-18 16:25:47
3	Andre Wahyudi	0.01 s	PHP	2022-09-26 05:06:07

#	User	Runtime	Language	Date
1	Hakan Kjellerstrand	0.02 s	Prolog	2023-01-21 22:54:45
2	Andriy Zyevakov	0.02 s	Prolog	2024-04-03 16:14:55

#	User	Runtime	Language	Date
1	Hasan Kalzi	0.02 s	Python 2	2022-06-17 16:36:18
2	Johan Lyts	0.03 s	Python 2	2022-03-10 21:19:17
3	Yanmarshus Bachtiar	0.03 s	Python 2	2022-03-12 13:04:56
4	Gibransyah	0.03 s	Python 2	2022-03-14 10:23:33
5	Balamurugan M	0.03 s	Python 2	2023-07-04 17:04:31
6	Mythili S	0.07 s	Python 2	2025-03-30 08:31:33
7	KALAJAYANTHI M	0.07 s	Python 2	2025-10-03 06:39:38

#	User	Runtime	Language	Date
1	Frederik Peter Høngaard	0.04 s	Python 3	2022-06-04 22:27:14
2	Hidden user	0.04 s	Python 3	2022-06-06 11:15:19
3	Khang Trần	0.04 s	Python 3	2022-06-07 11:19:06
4	Gustav Wass	0.04 s	Python 3	2022-06-08 12:46:39
5	Hidden user	0.04 s	Python 3	2022-06-08 19:45:40
6	Trictan	0.04 s	Python 3	2022-06-11 14:22:22
7	Jaivignesh Venugopal	0.04 s	Python 3	2022-06-13 15:45:06
8	moukhass raja	0.04 s	Python 3	2022-06-13 17:01:45
9	Hasan Kalzi	0.04 s	Python 3	2022-06-17 16:34:12
10	András Biczó	0.04 s	Python 3	2022-06-17 21:12:29

#	User	Runtime	Language	Date
1	Thomas Feld	0.06 s	Ruby	2022-11-01 10:35:57
2	Eugen Neagoe	0.06 s	Ruby	2023-04-06 22:48:16
3	Alexander Bilde Pedersen	0.06 s	Ruby	2023-04-08 17:56:32
4	Frederik Petersen	0.06 s	Ruby	2023-10-13 11:19:54
5	Krzys Hejno	0.06 s	Ruby	2025-01-22 16:58:39
6	Chenzhang Hu	0.07 s	Ruby	2024-05-24 17:07:54
7	Andreas Severin Hauch Trøstrup	0.07 s	Ruby	2024-11-26 14:09:58

#	User	Runtime	Language	Date
1	Danial Haseeb	0.00 s	Swift	2023-10-08 10:19:12

#	User	Runtime	Language	Date
1	Jhony Andreas	0.04 s	Visual Basic	2023-07-08 06:12:01
2	Christian Højgård Simonsen	0.04 s	Visual Basic	2023-10-31 17:57:12

#	User	Length	Language	Date
1	Thomas Feld	41	APL	2023-05-16 12:15:52
2	Steve Allen	42	APL	2023-05-13 08:59:18
3	Max NC	56	APL	2023-09-12 00:05:09
4	JackTheEgg	69	APL	2023-07-08 00:08:41
5	Matzuka	75	APL	2025-04-02 15:10:35

#	User	Length	Language	Date
1	Chenzhang Hu	56	Bash	2025-09-13 02:22:08

#	User	Length	Language	Date
1	Gaelin Shupe	72	C	2023-04-04 00:13:41
2	Benjamin Iserman	72	C	2023-04-04 18:36:10
3	David Medin	96	C	2023-04-03 05:31:25
4	Martin Blom	116	C	2023-09-20 13:38:24
5	Sawyer Frie	159	C	2023-03-31 09:04:19
6	Kjeld Janke Lück	239	C	2023-11-10 19:54:57
7	Jonatan Altebro	243	C	2025-04-08 12:50:26
8	James Christian Ruiz	259	C	2022-12-24 11:01:52
9	Florian ten Napel	273	C	2024-10-06 19:07:02
10	Justin Rainier Go	300	C	2024-09-15 15:07:55

#	User	Length	Language	Date
1	Gregory Sinclair	154	C#	2023-11-04 05:27:56
2	Aiden Bilyeu	192	C#	2023-02-04 03:18:10
3	Mikael Palokangas	208	C#	2023-08-07 20:19:38
4	traxex	246	C#	2024-04-29 13:15:02
5	Hidden user	319	C#	2024-02-26 22:38:44
6	Göran Andersson	339	C#	2022-05-07 23:32:13
7	Esty Crow	343	C#	2022-10-05 22:28:45
8	André Nøbbe Christiansen	381	C#	2023-11-06 21:04:46
9	Cecilia Nguyen	454	C#	2023-11-02 04:22:11
10	Peter Due Jensen	466	C#	2023-08-06 20:14:26

#	User	Length	Language	Date
1	Jordan A Hopkins	147	C++	2023-07-24 19:03:36
2	Jonas Rouven Schoenauer	162	C++	2022-10-19 05:42:43
3	Frans Meulenbroeks	165	C++	2024-10-22 22:08:57
4	Include	233	C++	2022-05-01 03:25:19
5	Evan Michael Bailey	234	C++	2023-04-20 02:33:09
6	黃太陽	243	C++	2022-02-24 17:26:20
7	Nicholas Jimmy Alden	250	C++	2022-12-04 05:16:53
8	Badrinath Konidala	255	C++	2022-12-31 06:34:50
9	Clinton Connelly	255	C++	2023-11-15 23:44:54
10	Samuel Tan	259	C++	2022-12-04 17:02:49

#	User	Length	Language	Date
1	Tobias Glimmerfors	1094	COBOL	2023-08-15 20:45:52
2	David Karguth	1358	COBOL	2022-08-25 08:00:36

#	User	Length	Language	Date
1	CharsKun	364	Dart	2023-05-26 08:39:09

#	User	Length	Language	Date
1	Tim Mondorf	323	F#	2022-02-25 16:27:02
2	Jacob Harris Cryer Kragh	369	F#	2022-06-01 19:58:26
3	Elias Smedegaard	465	F#	2023-11-17 13:19:06
4	Jacob To	875	F#	2023-11-14 17:20:42
5	Victor Rasmussen	884	F#	2022-09-23 17:58:02

#	User	Length	Language	Date
1	Suka Isnaini	303	Go	2023-12-10 17:29:12
2	Jimmy Nejtron	382	Go	2022-12-23 17:05:04
3	Alejandro Laufer	402	Go	2022-06-01 15:00:29
4	Alexis Romero	402	Go	2022-08-26 12:58:15
5	Zion	402	Go	2022-09-01 12:22:23
6	Reyes	402	Go	2023-02-06 09:23:31
7	Peter Dinning	402	Go	2023-09-27 18:00:07
8	Auwais	402	Go	2024-11-07 19:23:16
9	Robertus Bagaskara	404	Go	2022-04-02 03:24:06
10	Diego Saldias	421	Go	2023-10-27 17:23:08

#	User	Length	Language	Date
1	Matthew A Johnson	112	Haskell	2023-05-11 18:16:28
2	Sebastian Banert	187	Haskell	2023-04-05 15:53:21
3	Steinar Simonnes	191	Haskell	2023-02-03 23:13:10
4	Hidden user	241	Haskell	2024-01-31 19:33:11
5	Elizabeth Doughty	280	Haskell	2024-01-27 09:22:48
6	Rikke Aas	315	Haskell	2023-07-24 16:23:28
7	Brian Hwang	317	Haskell	2022-09-06 07:14:50
8	Daniel Cabral	318	Haskell	2022-03-04 10:00:33
9	Scott Dauer	325	Haskell	2022-03-10 04:55:30
10	Ng Tek In	338	Haskell	2022-08-07 18:26:59

#	User	Length	Language	Date
1	Einar Þór Ívarsson	385	Java	2024-02-08 18:50:43
2	Ranjith M	387	Java	2023-02-04 21:40:35
3	Jason Liu	398	Java	2023-04-27 18:40:31
4	Anton Sandin	406	Java	2022-04-20 14:29:50
5	Raymond Arrington	408	Java	2024-06-08 04:32:18
6	Aarav Bansal	411	Java	2023-04-28 17:28:07
7	Thomas King	422	Java	2024-06-19 04:10:01
8	Lim Ting Kai	424	Java	2023-05-30 13:10:36
9	Crystal Sharpe	429	Java	2022-02-22 04:44:58
10	Thomas Sørup Bavnhøj	450	Java	2022-07-31 22:13:05

#	User	Length	Language	Date
1	Antti Ellilä	226	JavaScript (Node.js)	2023-02-04 00:22:36
2	Yassin Swag	318	JavaScript (Node.js)	2023-12-01 10:42:28
3	Ram Basnet	388	JavaScript (Node.js)	2022-02-24 18:57:42
4	Thomas Lunøe	438	JavaScript (Node.js)	2023-02-27 15:23:04
5	marcus bryder	443	JavaScript (Node.js)	2023-02-27 15:18:45
6	Hidden user	445	JavaScript (Node.js)	2023-02-27 15:03:15
7	Christopher Churchwell	463	JavaScript (Node.js)	2023-11-24 16:40:02
8	Faisal Rahman	471	JavaScript (Node.js)	2024-01-31 06:38:35
9	Magnus Lundgren	474	JavaScript (Node.js)	2023-02-27 15:40:28
10	Imar Ismail	494	JavaScript (Node.js)	2023-02-27 15:23:11

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	93	JavaScript (SpiderMonkey)	2022-11-03 22:06:04
2	Evan Magill	114	JavaScript (SpiderMonkey)	2024-04-13 05:26:43
3	Ben Armstrong	127	JavaScript (SpiderMonkey)	2025-08-11 15:34:07
4	Jimmy Gustafsson	132	JavaScript (SpiderMonkey)	2022-06-23 14:47:39
5	Zach Tschetter	160	JavaScript (SpiderMonkey)	2023-06-23 23:08:57
6	Bjørn Chr. Soltvedt	167	JavaScript (SpiderMonkey)	2022-02-19 13:46:06
7	Håkan Lindahl	320	JavaScript (SpiderMonkey)	2022-06-15 17:23:35
8	Tyler VanHaren	374	JavaScript (SpiderMonkey)	2022-06-04 18:32:47
9	Nicklas Utgaard	475	JavaScript (SpiderMonkey)	2022-12-30 20:26:42

#	User	Length	Language	Date
1	Danny Robinson	97	Julia	2023-09-01 02:37:29
2	Timothy Gaede	459	Julia	2024-03-20 10:13:24

#	User	Length	Language	Date
1	Troels Bjerre Lund	181	Kotlin	2022-03-27 19:56:22
2	Troy Warmboe	286	Kotlin	2023-04-10 22:39:27
3	Sergey Jakobsen	292	Kotlin	2022-02-24 00:37:18
4	Magnus Tønnessen	341	Kotlin	2022-05-13 13:28:48
5	Adam Rankin	469	Kotlin	2023-05-01 06:27:09
6	Thobias Larsen	532	Kotlin	2022-05-26 10:15:45
7	Ola Sundell	553	Kotlin	2022-02-21 16:03:43
8	Emil Wihlander	568	Kotlin	2023-05-08 22:28:54
9	Zaw Myat	584	Kotlin	2024-02-03 22:18:43
10	Martijn Muijsers	674	Kotlin	2024-05-28 10:03:48

#	User	Length	Language	Date
1	Hovig Manjikian	394	OCaml	2022-04-30 01:34:08

#	User	Length	Language	Date
1	Hidden user	542	Odin	2025-04-30 02:28:34

#	User	Length	Language	Date
1	Ingemar Ragnemalm	461	Pascal	2022-02-21 20:23:06
2	David Connolly	688	Pascal	2022-04-04 19:52:49

#	User	Length	Language	Date
1	Saito Ta	56	Perl	2024-04-08 12:44:15

#	User	Length	Language	Date
1	Renate Fiala-Lundström	207	PHP	2022-03-17 01:18:32
2	Nick Hargrove	399	PHP	2022-05-18 16:25:47
3	Andre Wahyudi	448	PHP	2022-09-26 05:06:07

#	User	Length	Language	Date
1	Hakan Kjellerstrand	394	Prolog	2023-01-21 22:54:45
2	Andriy Zyevakov	479	Prolog	2024-04-03 16:14:55

#	User	Length	Language	Date
1	KALAJAYANTHI M	153	Python 2	2025-10-03 06:39:38
2	Yanmarshus Bachtiar	154	Python 2	2022-03-12 13:04:56
3	Johan Lyts	166	Python 2	2022-03-10 21:19:17
4	Gibransyah	222	Python 2	2022-03-14 10:23:33
5	Mythili S	381	Python 2	2025-03-30 08:31:33
6	Hasan Kalzi	930	Python 2	2022-03-01 14:02:12
7	Balamurugan M	930	Python 2	2023-07-04 17:04:31

#	User	Length	Language	Date
1	Kevin Gomez	72	Python 3	2023-07-25 00:37:32
2	Clement Oh	75	Python 3	2023-08-19 16:25:36
3	Joel Niemelä	83	Python 3	2025-03-30 07:38:06
4	Benjamin Z White	84	Python 3	2023-05-03 00:22:02
5	Tommi Järvenpää	84	Python 3	2024-03-08 13:04:42
6	Lawry Sorenson	87	Python 3	2022-12-03 01:00:33
7	Alexandre Douard	89	Python 3	2023-08-19 14:38:47
8	Jonathan Ståhl	90	Python 3	2024-10-10 19:10:59
9	JY Loh	91	Python 3	2022-11-08 11:11:19
10	Tom Chauvel	91	Python 3	2024-01-02 01:26:22

#	User	Length	Language	Date
1	Chenzhang Hu	47	Ruby	2024-05-24 17:07:54
2	Thomas Feld	64	Ruby	2022-11-03 13:32:38
3	Frederik Petersen	90	Ruby	2023-10-13 11:19:54
4	Andreas Severin Hauch Trøstrup	101	Ruby	2024-11-26 14:09:58
5	Alexander Bilde Pedersen	134	Ruby	2023-04-08 17:56:32
6	Eugen Neagoe	183	Ruby	2023-04-06 22:48:16
7	Krzys Hejno	378	Ruby	2025-01-22 17:00:09

#	User	Length	Language	Date
1	Vincent Lagerros	165	Rust	2024-11-24 19:56:10
2	Emil Dichmann	308	Rust	2025-09-14 13:00:31
3	Bas Dirks	433	Rust	2022-02-19 12:52:46
4	David Rasch	447	Rust	2022-04-15 14:03:35
5	Morten Raeburn	468	Rust	2023-09-17 16:45:48
6	Aske Wachs	476	Rust	2023-02-03 11:42:33
7	Alexander Skovsende	481	Rust	2022-02-25 16:38:48
8	Hidden user	491	Rust	2022-10-25 06:09:11
9	Pankajkumar Patro	501	Rust	2024-09-12 13:46:51
10	Connor Ford	552	Rust	2024-07-17 21:34:53

#	User	Length	Language	Date
1	Danial Haseeb	544	Swift	2023-10-08 10:19:12

#	User	Length	Language	Date
1	Jhony Andreas	477	Visual Basic	2023-07-08 06:12:01
2	Christian Højgård Simonsen	495	Visual Basic	2023-10-31 17:57:12

Solution running time distribution