Problem A
Cetiri — Problem Statistics

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Submissions	6344
Accepted submissions	3326
Submission ratio	52.43%
Authors	3216
Accepted authors	2978
Author ratio	92.60%

#	User	Runtime	Language	Date
1	Sebastian Banert	0.00 s	Ada	2024-10-18 21:50:04

#	User	Runtime	Language	Date
1	Chenzhang Hu	0.01 s	Bash	2023-11-14 16:36:29
2	Danny Robinson	0.02 s	Bash	2023-09-26 11:50:48

#	User	Runtime	Language	Date
1	Ron Harper	0.04 s	C#	2018-01-31 17:39:50
2	Dustin Cook	0.04 s	C#	2018-07-06 11:15:52
3	Mehdi Adelzadeh	0.04 s	C#	2019-04-29 17:12:37
4	Mark Meysenburg	0.04 s	C#	2025-02-07 16:23:41
5	Ugnius Skučas	0.05 s	C#	2016-10-17 22:50:45
6	Albert Samigullin	0.05 s	C#	2016-11-28 13:09:18
7	Hidden user	0.05 s	C#	2017-01-20 15:25:48
8	Hidden user	0.05 s	C#	2017-04-21 17:44:04
9	Leii Zaki	0.05 s	C#	2017-08-03 01:56:44
10	Faisal Rahman	0.05 s	C#	2017-11-08 19:11:55

#	User	Runtime	Language	Date
1	David Cawthon	0.04 s	Common Lisp	2020-09-13 03:51:37

#	User	Runtime	Language	Date
1	Thomas McEwen	0.01 s	Dart	2025-01-23 20:51:37

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.09 s	F#	2022-07-20 09:51:01

#	User	Runtime	Language	Date
1	Björn Löfroth	0.04 s	Java	2010-11-10 18:00:46
2	Isak Jägberg	0.04 s	Java	2016-09-23 13:25:51
3	Hidden user	0.04 s	Java	2016-09-23 13:39:44
4	Hidden user	0.04 s	Java	2016-09-23 13:40:02
5	Elias Andersson	0.04 s	Java	2016-09-23 13:44:10
6	Edvin Lundberg	0.04 s	Java	2016-09-23 14:07:19
7	Hidden user	0.04 s	Java	2016-09-23 22:04:19
8	Erik Baalhuis	0.04 s	Java	2016-09-26 22:16:43
9	Øyvind Haarberg	0.04 s	Java	2016-10-21 20:45:37
10	Ragnhild Aalvik	0.04 s	Java	2016-10-21 20:55:09

#	User	Runtime	Language	Date
1	Chris Wong	0.04 s	JavaScript (Node.js)	2021-03-01 00:09:01
2	Daniel Lindström	0.04 s	JavaScript (Node.js)	2025-05-20 14:07:29
3	Markus Daghall	0.04 s	JavaScript (Node.js)	2025-05-20 14:10:41
4	adam hakansson	0.04 s	JavaScript (Node.js)	2025-05-20 14:11:05
5	Martin Green	0.04 s	JavaScript (Node.js)	2025-05-20 14:30:43
6	Alexandra Seppänen	0.04 s	JavaScript (Node.js)	2025-05-20 14:34:39
7	Kit Gustavsson	0.04 s	JavaScript (Node.js)	2025-05-20 14:38:06
8	Johan Arkad	0.04 s	JavaScript (Node.js)	2025-05-20 14:53:52
9	Joel Ekman	0.04 s	JavaScript (Node.js)	2025-05-20 15:14:39
10	Sander Hellesø	0.05 s	JavaScript (Node.js)	2019-04-25 01:06:07

#	User	Runtime	Language	Date
1	Peter Kedemo	0.02 s	JavaScript (SpiderMonkey)	2016-09-25 18:31:53
2	Bjørn Chr. Soltvedt	0.02 s	JavaScript (SpiderMonkey)	2016-10-19 02:10:30
3	Mohammad Mousavi	0.02 s	JavaScript (SpiderMonkey)	2016-12-31 08:38:41
4	Paul Leung	0.02 s	JavaScript (SpiderMonkey)	2017-02-21 19:19:37
5	Bernard Perrin	0.02 s	JavaScript (SpiderMonkey)	2019-02-01 12:39:05
6	Peter Menyes	0.02 s	JavaScript (SpiderMonkey)	2021-08-30 15:16:29
7	Christian Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-01-13 14:58:13
8	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-07-12 11:32:58
9	Evan Magill	0.02 s	JavaScript (SpiderMonkey)	2024-11-23 03:20:14

#	User	Runtime	Language	Date
1	Timothy Gaede	0.59 s	Julia	2024-03-26 04:02:00
2	Danny Robinson	0.77 s	Julia	2023-09-26 11:35:59

#	User	Runtime	Language	Date
1	Troy Warmboe	0.23 s	Kotlin	2020-02-12 02:12:04
2	Merih Bora Poçan	0.23 s	Kotlin	2020-09-16 07:28:46
3	Jacob Huebner	0.23 s	Kotlin	2022-02-22 04:26:33
4	Adam Rankin	0.23 s	Kotlin	2023-05-09 03:47:45
5	Ravisai Tiruvuri	0.23 s	Kotlin	2024-03-12 11:56:12
6	Dmitry Shostak	0.24 s	Kotlin	2019-09-10 18:33:49
7	Thanh Le	0.24 s	Kotlin	2020-09-21 01:50:45
8	Sergey Jakobsen	0.24 s	Kotlin	2021-06-07 20:39:51
9	Johnny Baloney	0.24 s	Kotlin	2021-09-19 17:51:44
10	Adam Koprowski	0.25 s	Kotlin	2020-09-12 00:12:59

#	User	Runtime	Language	Date
1	Matthew Wilbern	0.00 s	Lua	2024-09-08 12:42:01

#	User	Runtime	Language	Date
1	Yuanting Mao	0.00 s	OCaml	2023-08-02 23:27:25

#	User	Runtime	Language	Date
1	Alfredo Beaumont	0.00 s	Odin	2024-01-27 11:00:07

#	User	Runtime	Language	Date
1	Egor Shchetinin	0.00 s	Pascal	2018-02-10 20:39:53
2	Vova Podkorytov	0.00 s	Pascal	2018-02-10 20:42:41
3	Ingemar Ragnemalm	0.00 s	Pascal	2019-11-20 10:57:17
4	Hobert Ho	0.00 s	Pascal	2022-07-22 13:04:10
5	Hidden user	0.00 s	Pascal	2023-10-05 23:16:34

#	User	Runtime	Language	Date
1	cojonas1	0.01 s	PHP	2021-02-10 10:31:05
2	陳建宏	0.01 s	PHP	2021-06-10 18:41:40
3	Renate	0.01 s	PHP	2023-08-10 01:46:39

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.02 s	Prolog	2017-12-18 14:08:19
2	Hakan Kjellerstrand	0.02 s	Prolog	2023-02-12 17:07:28

#	User	Runtime	Language	Date
1	Bernhard Kartefla	0.07 s	Python 2	2016-09-25 21:38:06
2	Henrik Adolfsson	0.07 s	Python 2	2017-02-05 15:41:32
3	Adriaan de Vries	0.07 s	Python 2	2017-02-19 16:45:46
4	Cliodhna Harrison	0.07 s	Python 2	2017-08-08 16:17:38
5	Justin Su	0.07 s	Python 2	2017-09-19 09:13:06
6	Andrei Stoica	0.07 s	Python 2	2017-11-26 22:26:06
7	Yanmarshus Bachtiar	0.07 s	Python 2	2019-07-31 12:13:54
8	Thomas Feld	0.07 s	Python 2	2019-08-27 13:54:02
9	Olaru Andreea	0.07 s	Python 2	2019-09-14 12:25:53
10	beagle dog	0.07 s	Python 2	2020-05-08 12:05:25

#	User	Runtime	Language	Date
1	David Huang	0.04 s	Python 3	2024-09-04 14:02:52
2	Tait Hoyem	0.04 s	Python 3	2024-09-07 00:14:10
3	James Huston	0.04 s	Python 3	2024-09-07 18:59:03
4	Eric Fung	0.04 s	Python 3	2024-09-12 21:37:01
5	Luis Enrique Cortijo Gonzales	0.04 s	Python 3	2024-09-13 03:35:47
6	Alexssander José de Oliveira de Castro	0.04 s	Python 3	2024-09-16 06:46:59
7	Armita	0.04 s	Python 3	2024-09-21 13:01:14
8	Prashikshit Saini	0.04 s	Python 3	2024-09-24 17:34:32
9	Kelly Dance	0.04 s	Python 3	2024-09-25 00:18:45
10	Hidden user	0.04 s	Python 3	2024-09-25 23:03:55

#	User	Runtime	Language	Date
1	André Danielsson	0.07 s	Ruby	2016-09-23 13:30:22
2	Hidden user	0.07 s	Ruby	2018-11-06 15:50:57
3	Hidden user	0.07 s	Ruby	2019-04-23 22:30:48
4	Hidden user	0.07 s	Ruby	2019-09-27 20:13:13
5	Macdara mac an tSionnaigh	0.07 s	Ruby	2019-09-27 20:26:34
6	Sean Malloy	0.07 s	Ruby	2020-11-02 04:09:11
7	Kok Dith	0.07 s	Ruby	2021-08-18 11:13:27
8	Hidden user	0.07 s	Ruby	2021-10-16 19:36:03
9	Thomas Feld	0.07 s	Ruby	2023-01-27 13:09:29
10	Russell Ng	0.07 s	Ruby	2025-05-24 23:40:08

#	User	Length	Language	Date
1	Sebastian Banert	451	Ada	2024-10-18 21:50:04

#	User	Length	Language	Date
1	Chenzhang Hu	5	Bash	2024-02-03 10:44:59
2	Danny Robinson	67	Bash	2023-09-26 11:50:48

#	User	Length	Language	Date
1	Frans Meulenbroeks	171	C	2024-10-01 15:14:57
2	Magnus Wass	244	C	2020-03-17 00:44:31
3	a_b__c	265	C	2021-02-02 17:47:24
4	Hidden user	379	C	2024-09-17 12:24:28
5	winnie the pooh	390	C	2021-06-19 08:55:12
6	Hidden user	407	C	2017-11-11 18:45:04
7	Sambit Palit	414	C	2020-10-18 19:43:56
8	Busetty Rajaram	424	C	2017-04-25 20:33:48
9	Ng Wei Jie	439	C	2020-02-17 18:31:52
10	Roberto Kreshna	439	C	2020-12-05 15:51:09

#	User	Length	Language	Date
1	Gregory Sinclair	210	C#	2023-11-14 03:13:14
2	Klas af Geijerstam	329	C#	2018-02-05 14:30:24
3	Anthony Ye	392	C#	2023-05-21 16:20:03
4	Esty Crow	459	C#	2023-05-19 10:00:47
5	Thomas Norris	508	C#	2019-10-04 03:47:17
6	Shantanu Sharma	565	C#	2024-11-09 17:41:53
7	Göran Andersson	585	C#	2022-05-14 00:55:17
8	Ali Aliev	620	C#	2022-02-04 19:24:37
9	Hidden user	620	C#	2022-10-04 10:52:04
10	Michael Damsgaard	633	C#	2024-11-28 20:08:53

#	User	Length	Language	Date
1	Frans Meulenbroeks	157	C++	2024-10-01 15:13:52
2	Dominic Sagen	159	C++	2022-10-08 21:30:50
3	Hakan Kjellerstrand	181	C++	2025-03-02 08:58:29
4	huytool	219	C++	2020-10-22 14:40:24
5	暗夜行者	245	C++	2021-10-21 14:21:27
6	Admir Ahmespahić	255	C++	2019-03-28 14:16:09
7	Hidden user	263	C++	2024-09-07 22:13:17
8	Long Trần Huy	264	C++	2017-11-18 09:45:26
9	Moncef Mhasni	266	C++	2018-07-16 19:13:16
10	Naufal Aziz	275	C++	2017-01-20 10:51:38

#	User	Length	Language	Date
1	David Cawthon	714	Common Lisp	2020-09-13 03:51:37

#	User	Length	Language	Date
1	Thomas McEwen	552	Dart	2025-01-23 20:51:37

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	360	F#	2022-07-20 09:51:01

#	User	Length	Language	Date
1	Hidden user	283	Go	2024-04-28 08:01:41
2	Hidden user	305	Go	2018-11-06 16:31:53
3	Zeheng Li	309	Go	2023-01-20 07:18:29
4	Anna Winters	352	Go	2018-09-28 22:46:33
5	Ian Howell	407	Go	2019-03-26 19:23:04
6	Jinwoo Lee	462	Go	2018-12-30 04:00:30
7	Krzysztof Gibuła	463	Go	2019-01-13 11:25:32
8	Jack Kryger Sørensen	471	Go	2022-01-28 12:32:00
9	Miguel Martinez	492	Go	2019-07-28 11:28:10
10	jun009	562	Go	2018-11-25 15:51:15

#	User	Length	Language	Date
1	Håkon Flatval	190	Haskell	2018-09-05 17:08:38
2	Zach Tschetter	213	Haskell	2019-04-13 23:22:10
3	Sebastian Banert	217	Haskell	2023-09-13 13:48:14
4	Miguel Müller	229	Haskell	2017-11-17 16:30:44
5	Llaurence Git	233	Haskell	2018-11-09 08:08:17
6	Anthony Clark	251	Haskell	2017-03-03 20:06:54
7	Nicholas Marsh	256	Haskell	2022-09-19 12:53:47
8	Hidden user	257	Haskell	2018-11-06 16:09:33
9	Li Jun	273	Haskell	2023-06-21 12:46:49
10	Daniel Cabral	278	Haskell	2021-08-20 17:37:58

#	User	Length	Language	Date
1	Doug Goodman	437	Java	2017-09-15 17:57:38
2	Kevin Kauffman	450	Java	2022-01-02 22:43:01
3	Prakash Sanyasi	455	Java	2017-08-03 10:31:23
4	Brennan Cleland	460	Java	2023-01-14 01:12:11
5	Adrian Cuevas	469	Java	2020-04-16 02:57:30
6	Samuel Klingström	485	Java	2017-03-21 23:39:46
7	Frank Ruskey	488	Java	2017-04-11 01:44:53
8	Derrick Martin	488	Java	2018-05-20 00:26:04
9	Emil Saric	490	Java	2017-07-15 16:08:28
10	Martin Tran	499	Java	2018-11-03 03:37:11

#	User	Length	Language	Date
1	Rizky Muliawan	456	JavaScript (Node.js)	2024-02-19 05:32:48
2	Johan Arkad	492	JavaScript (Node.js)	2025-05-20 14:53:52
3	Daniel Lindström	552	JavaScript (Node.js)	2025-05-20 14:07:29
4	Sander Hellesø	687	JavaScript (Node.js)	2019-04-25 01:06:07
5	Lucas Rudqwist	697	JavaScript (Node.js)	2025-05-20 14:13:48
6	Alexandra Seppänen	709	JavaScript (Node.js)	2025-05-20 14:34:39
7	Markus Daghall	710	JavaScript (Node.js)	2025-05-20 14:10:41
8	adam hakansson	722	JavaScript (Node.js)	2025-05-20 14:11:05
9	Chris Wong	754	JavaScript (Node.js)	2021-03-01 00:09:01
10	Andoko Chandra	764	JavaScript (Node.js)	2020-10-12 14:03:50

#	User	Length	Language	Date
1	Jimmy Gustafsson	106	JavaScript (SpiderMonkey)	2024-07-12 11:32:58
2	Bernard Perrin	224	JavaScript (SpiderMonkey)	2019-02-01 12:39:05
3	Bjørn Chr. Soltvedt	231	JavaScript (SpiderMonkey)	2016-10-19 02:10:30
4	Evan Magill	251	JavaScript (SpiderMonkey)	2024-11-23 03:20:14
5	Peter Menyes	297	JavaScript (SpiderMonkey)	2021-08-30 15:16:29
6	Peter Kedemo	300	JavaScript (SpiderMonkey)	2016-09-25 18:31:53
7	Christian Cederquist	339	JavaScript (SpiderMonkey)	2023-01-13 14:58:13
8	Mohammad Mousavi	381	JavaScript (SpiderMonkey)	2016-12-31 08:38:41
9	Paul Leung	463	JavaScript (SpiderMonkey)	2017-02-21 19:26:25

#	User	Length	Language	Date
1	Danny Robinson	109	Julia	2023-09-26 11:35:59
2	Timothy Gaede	531	Julia	2024-03-26 04:02:00

#	User	Length	Language	Date
1	Sergey Jakobsen	262	Kotlin	2021-06-07 20:39:51
2	Troy Warmboe	285	Kotlin	2020-02-12 02:12:04
3	Jacob Huebner	334	Kotlin	2022-02-22 04:26:33
4	Emil Wihlander	358	Kotlin	2023-07-27 13:13:11
5	Adam Koprowski	366	Kotlin	2020-09-12 00:12:59
6	Einar Kjellback	368	Kotlin	2019-12-18 22:09:12
7	Dmitry Shostak	431	Kotlin	2019-09-10 18:33:49
8	Thanh Le	466	Kotlin	2020-09-21 01:50:45
9	Merih Bora Poçan	509	Kotlin	2020-09-16 07:28:46
10	Adam Rankin	572	Kotlin	2023-05-09 03:47:45

#	User	Length	Language	Date
1	Matthew Wilbern	1695	Lua	2024-09-08 12:42:01

#	User	Length	Language	Date
1	Yuanting Mao	326	OCaml	2023-08-02 23:29:36

#	User	Length	Language	Date
1	Alfredo Beaumont	353	Odin	2024-01-27 11:00:07

#	User	Length	Language	Date
1	Egor Shchetinin	378	Pascal	2018-02-10 20:39:53
2	Vova Podkorytov	404	Pascal	2018-02-10 20:42:41
3	Ingemar Ragnemalm	459	Pascal	2019-11-20 10:57:17
4	Hidden user	730	Pascal	2023-10-05 23:16:34
5	Hobert Ho	1187	Pascal	2022-07-22 13:04:10

#	User	Length	Language	Date
1	Renate	252	PHP	2023-08-10 01:46:39
2	cojonas1	414	PHP	2021-02-10 10:31:05
3	陳建宏	1203	PHP	2021-06-10 18:41:40

#	User	Length	Language	Date
1	Hakan Kjellerstrand	312	Prolog	2023-02-12 17:07:28
2	Andriy Zyevakov	984	Prolog	2017-12-18 14:08:19

#	User	Length	Language	Date
1	Thomas Feld	112	Python 2	2019-08-27 13:54:02
2	Haggai Liu	148	Python 2	2017-01-30 18:59:53
3	Jesper Öqvist	152	Python 2	2018-10-22 17:30:15
4	Andreas Björklund	155	Python 2	2019-12-07 12:24:11
5	Cole Bite	156	Python 2	2017-03-22 00:44:34
6	Guan Yang Ze	158	Python 2	2019-09-08 09:13:57
7	Muzakhir Amanzholov	173	Python 2	2017-02-09 21:17:50
8	Rafael Rivas	180	Python 2	2019-03-07 08:02:01
9	Bernhard Kartefla	189	Python 2	2016-09-25 21:38:06
10	Johann Ly	195	Python 2	2018-07-09 09:02:15

#	User	Length	Language	Date
1	Clement Oh	70	Python 3	2023-07-14 13:20:04
2	Morten Clausen	89	Python 3	2022-10-21 19:57:12
3	Tam Keng Hong	106	Python 3	2024-04-18 11:21:32
4	Zin Linn	111	Python 3	2019-10-30 08:18:08
5	Nguyên Khôi Đỗ	112	Python 3	2024-12-27 21:48:55
6	Kelly Dance	114	Python 3	2024-09-25 00:18:45
7	Jennifer Wang	115	Python 3	2023-05-21 01:53:45
8	Jason Cannon	117	Python 3	2018-08-23 22:10:09
9	Hidden user	117	Python 3	2018-10-06 22:04:18
10	Thibault Raffaillac	118	Python 3	2023-08-01 15:43:41

#	User	Length	Language	Date
1	Russell Ng	59	Ruby	2025-05-24 23:40:08
2	Thomas Feld	63	Ruby	2023-01-27 13:09:29
3	Hidden user	119	Ruby	2021-10-16 19:36:03
4	Hidden user	170	Ruby	2018-11-06 15:50:57
5	Hidden user	174	Ruby	2019-09-27 20:13:13
6	Macdara mac an tSionnaigh	237	Ruby	2019-09-27 20:26:34
7	Kok Dith	247	Ruby	2021-08-18 11:13:27
8	Hidden user	268	Ruby	2019-04-23 22:30:48
9	André Danielsson	294	Ruby	2016-09-23 13:30:22
10	Sean Malloy	302	Ruby	2020-11-02 04:09:11

#	User	Length	Language	Date
1	David Zacek	436	Rust	2021-06-21 20:57:28
2	Hidden user	503	Rust	2018-11-06 15:56:02
3	Vincent Lagerros	515	Rust	2025-02-06 15:53:00
4	Pankajkumar Patro	537	Rust	2024-10-16 18:58:23
5	Bas Dirks	644	Rust	2022-01-03 23:48:37
6	Alexandr Last	729	Rust	2023-08-18 23:19:41
7	jaswanth	745	Rust	2024-02-10 06:51:56
8	Artur Khuziakhmetov	807	Rust	2022-07-23 18:35:49
9	Eric Pinter	1026	Rust	2021-10-17 20:04:51
10	Lukman	1067	Rust	2021-08-10 18:24:30

Solution running time distribution