Problem A
Sok — Problem Statistics

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Submissions	3459
Accepted submissions	2023
Submission ratio	58.49%
Authors	1887
Full solves [?]	1773
Full solve Ratio	93.96%

#	User	Runtime	Language	Date
1	Linus Yng	0.02 s	C#	2017-05-28 17:11:05
2	Klas af Geijerstam	0.02 s	C#	2017-07-19 16:38:32
3	Jaclyn Chang	0.02 s	C#	2017-09-19 00:41:25
4	Aabir Bahaida	0.02 s	C#	2017-09-29 13:22:59
5	Johan Pettersson	0.02 s	C#	2018-05-13 22:48:45
6	Дмитро Рудий	0.02 s	C#	2018-05-18 15:27:34
7	Doug Goodman	0.02 s	C#	2018-05-18 23:10:18
8	Davi Ajmaya	0.02 s	C#	2018-06-07 06:50:23
9	Kunwei Zhang	0.02 s	C#	2018-06-08 11:36:17
10	Duelene Olson	0.02 s	C#	2018-07-06 05:46:21

#	User	Runtime	Language	Date
1	Brandon Mitchell	0.00 s	COBOL	2020-04-10 07:17:48

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Common Lisp	2019-08-03 18:59:18
2	David Cawthon	0.02 s	Common Lisp	2019-05-02 03:00:34

#	User	Runtime	Language	Date
1	Simon Johann Skødt	0.04 s	F#	2022-02-04 14:08:34
2	Leonora	0.04 s	F#	2022-02-04 14:09:21
3	Jacob Harris Cryer Kragh	0.04 s	F#	2022-07-14 14:33:38

#	User	Runtime	Language	Date
1	Hidden user	0.04 s	Java	2025-01-21 16:58:54
2	Martijn Muijsers	0.05 s	Java	2017-05-20 22:15:50
3	Micah Stairs	0.05 s	Java	2017-05-26 19:40:25
4	Nick Wu	0.05 s	Java	2017-06-18 20:31:04
5	Samuel Klingström	0.05 s	Java	2017-07-24 13:26:04
6	Erik Baalhuis	0.05 s	Java	2017-08-29 15:05:30
7	Zhuohan Yang	0.05 s	Java	2018-01-05 04:41:05
8	Morgan K Bender	0.05 s	Java	2018-05-16 01:10:39
9	Ivan Thrysøe	0.05 s	Java	2018-10-01 20:01:34
10	José Vander Meulen	0.05 s	Java	2018-10-07 21:07:20

#	User	Runtime	Language	Date
1	Hidden user	0.04 s	JavaScript (Node.js)	2024-11-05 06:34:53
2	Carl Sundvall	0.05 s	JavaScript (Node.js)	2018-11-13 15:12:23
3	Gurpartap Singh Bhatti	0.05 s	JavaScript (Node.js)	2019-03-08 06:54:01
4	BRYAN DAVID ALVAREZ GALVIS	0.05 s	JavaScript (Node.js)	2024-03-17 22:40:19
5	Andoko Chandra	0.42 s	JavaScript (Node.js)	2020-10-11 13:42:41
6	Chris Wong	0.42 s	JavaScript (Node.js)	2021-02-17 12:42:21
7	Howard Tin Chi Chan	0.42 s	JavaScript (Node.js)	2021-03-05 09:31:29
8	John	0.42 s	JavaScript (Node.js)	2021-04-15 08:03:56

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2017-05-22 04:47:53
2	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2017-06-04 15:59:41
3	Nicklas Utgaard	0.01 s	JavaScript (SpiderMonkey)	2018-06-25 22:58:01
4	Andrea Bianchessi	0.02 s	JavaScript (SpiderMonkey)	2018-08-21 22:39:17
5	Nguyễn Hùng Cường	0.02 s	JavaScript (SpiderMonkey)	2018-09-04 10:26:26
6	Peter Menyes	0.02 s	JavaScript (SpiderMonkey)	2021-08-15 12:23:25
7	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-01-13 22:33:40
8	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-07-15 00:06:56

#	User	Runtime	Language	Date
1	Timothy Gaede	0.75 s	Julia	2024-04-02 07:39:37
2	Danny Robinson	0.82 s	Julia	2023-09-26 05:36:12

#	User	Runtime	Language	Date
1	Gaurav Tyagi	0.19 s	Kotlin	2018-08-13 09:48:05
2	Jacob Huebner	0.19 s	Kotlin	2020-06-26 08:48:27
3	Merih Bora Poçan	0.19 s	Kotlin	2020-08-02 23:32:51
4	Sergey Jakobsen	0.19 s	Kotlin	2021-03-08 20:48:54
5	Neil Harmon	0.20 s	Kotlin	2019-04-08 14:27:21
6	Jahid Hasan Imon	0.20 s	Kotlin	2020-05-25 23:01:19
7	Adam Rankin	0.20 s	Kotlin	2023-04-25 20:16:13
8	Emil Wihlander	0.20 s	Kotlin	2023-07-27 15:01:55
9	Einar Kjellback	0.22 s	Kotlin	2019-12-09 19:56:13
10	Troy Warmboe	0.22 s	Kotlin	2020-02-08 00:14:12

#	User	Runtime	Language	Date
1	Pamidimarri Reshwanth	0.00 s	Objective-C	2020-08-19 13:35:43

#	User	Runtime	Language	Date
1	Brandon Tang	0.00 s	OCaml	2023-09-24 05:25:10
2	Sebastian Banert	0.00 s	OCaml	2024-08-05 19:53:20

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2018-04-12 11:01:57
2	David Connolly	0.00 s	Pascal	2022-07-08 17:10:27

#	User	Runtime	Language	Date
1	Emil Riis Hansen	0.01 s	PHP	2018-10-30 10:33:40
2	Renate	0.01 s	PHP	2021-11-13 22:01:21
3	Andre Wahyudi	0.01 s	PHP	2023-03-15 06:11:46

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.01 s	Prolog	2018-11-12 15:12:47
2	Hakan Kjellerstrand	0.02 s	Prolog	2023-02-10 18:18:31

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	Python 2	2017-05-18 18:24:32
2	Christofer Ohlsson	0.02 s	Python 2	2017-05-18 20:04:51
3	Andrei Stoica	0.02 s	Python 2	2017-11-22 01:11:34
4	Cheng Hang	0.02 s	Python 2	2017-12-06 07:54:19
5	Hidden user	0.02 s	Python 2	2018-01-07 10:02:55
6	Johann Ly	0.02 s	Python 2	2018-05-13 22:55:15
7	Hasan Kalzi	0.02 s	Python 2	2022-06-20 10:30:31
8	William Gan	0.03 s	Python 2	2018-07-15 05:59:29
9	Frederik Højholt	0.03 s	Python 2	2018-07-19 09:30:39
10	Mark Kaius Helenurm	0.03 s	Python 2	2018-09-03 02:41:07

#	User	Runtime	Language	Date
1	Ciara Godwin	0.02 s	Python 3	2017-05-18 23:52:32
2	Rick van Rheenen	0.02 s	Python 3	2017-05-27 18:23:13
3	Jonathan Bradet-Legris	0.02 s	Python 3	2017-06-02 03:26:41
4	Everett Patterson	0.02 s	Python 3	2017-06-03 22:52:07
5	Matt Ballard	0.02 s	Python 3	2017-06-05 22:58:29
6	Isaac Lee	0.02 s	Python 3	2017-06-06 02:30:31
7	Baouden Youssef	0.02 s	Python 3	2017-08-16 22:34:21
8	Cian Ruane	0.02 s	Python 3	2017-08-20 21:01:55
9	Conner Lane	0.02 s	Python 3	2017-09-05 23:50:27
10	Jaclyn Chang	0.02 s	Python 3	2017-09-19 00:53:15

#	User	Runtime	Language	Date
1	Paul Vinell	0.04 s	Ruby	2018-05-12 21:35:22
2	Hidden user	0.05 s	Ruby	2021-02-17 15:24:34
3	Andreas Severin Hauch Trøstrup	0.06 s	Ruby	2022-08-31 20:03:43
4	Thomas Feld	0.06 s	Ruby	2022-11-25 10:44:17

#	User	Length	Language	Date
1	Hidden user	290	C	2017-08-14 20:10:18
2	Illa Somasekhar	295	C	2018-10-22 18:20:10
3	Cory Haas	328	C	2018-05-09 07:07:59
4	Hidden user	343	C	2017-11-19 13:55:59
5	hoaipro	345	C	2019-02-15 16:37:16
6	andromeda378	348	C	2023-12-11 19:28:35
7	Charlie Bouthoorn	357	C	2019-05-03 15:25:40
8	Matthew Hartono	368	C	2022-09-19 18:32:31
9	劉睿升	377	C	2021-06-05 09:34:08
10	劉睿升	377	C	2021-06-24 17:02:37

#	User	Length	Language	Date
1	Gregory Sinclair	297	C#	2023-11-21 22:22:44
2	Esty Crow	379	C#	2025-03-14 14:15:13
3	Kunwei Zhang	468	C#	2018-06-08 11:36:17
4	Eric Bäckhage	535	C#	2019-02-11 15:25:15
5	Anthony Ye	558	C#	2025-03-21 20:16:45
6	Goran Hrovat	649	C#	2019-05-08 09:50:55
7	Doug Goodman	655	C#	2018-05-18 23:10:18
8	Joakim-David	678	C#	2025-08-27 21:34:32
9	Klas af Geijerstam	705	C#	2017-07-19 16:39:17
10	Göran Andersson	711	C#	2022-05-13 13:10:37

#	User	Length	Language	Date
1	Zane Yu	185	C++	2018-12-12 14:52:38
2	Modak Shantanu Bharat	202	C++	2019-01-25 15:28:07
3	Subramanian Ramasamy	214	C++	2022-10-11 16:55:55
4	Johan Wind	217	C++	2018-03-19 01:57:47
5	丁哲宇	225	C++	2021-01-01 13:48:16
6	Hoang Trong Tan	227	C++	2022-11-13 18:41:37
7	Admasu Abera	229	C++	2019-11-22 13:59:24
8	Andreas Cendranata	239	C++	2019-01-31 10:32:10
9	Tyler Fernando	239	C++	2022-11-10 03:54:48
10	Sophie Zeihen	241	C++	2025-05-30 20:26:06

#	User	Length	Language	Date
1	Brandon Mitchell	827	COBOL	2020-04-10 07:17:48

#	User	Length	Language	Date
1	Hidden user	295	Common Lisp	2019-08-03 18:59:18
2	David Cawthon	543	Common Lisp	2019-05-02 03:00:34

#	User	Length	Language	Date
1	Simon Johann Skødt	488	F#	2022-02-04 14:08:34
2	Leonora	488	F#	2022-02-04 14:09:21
3	Jacob Harris Cryer Kragh	514	F#	2022-07-14 14:33:38

#	User	Length	Language	Date
1	Asmus Tørsleff	208	Go	2021-08-31 11:57:21
2	Bruno Martinovic	239	Go	2021-08-31 15:01:39
3	Mathias Hvolgaard Darling Larsen	264	Go	2022-09-01 13:43:35
4	Frederik Martini	271	Go	2021-08-31 13:39:47
5	Rasmus Streubel Nielsen	283	Go	2024-08-27 16:36:31
6	Hidden user	287	Go	2023-09-05 13:58:30
7	Lukas L. Hjelmstrand	291	Go	2021-08-31 11:47:46
8	Frederik Buur	295	Go	2024-08-27 12:15:50
9	Matthias Nyman	300	Go	2025-08-28 13:32:00
10	Lucas Tambour Fabricius	314	Go	2025-08-28 21:59:53

#	User	Length	Language	Date
1	Daniel Allendorf	295	Haskell	2018-03-25 13:30:33
2	Matthew Johnson	348	Haskell	2018-10-03 18:55:59
3	Håkon Flatval	352	Haskell	2018-08-16 21:02:19
4	Hidden user	368	Haskell	2017-05-18 18:29:11
5	Hidden user	381	Haskell	2019-08-23 14:47:05
6	Jan Hrček	386	Haskell	2020-11-08 14:47:26
7	Olle Eriksson	393	Haskell	2018-06-02 00:23:16
8	Carl Westerlund	400	Haskell	2020-09-22 12:02:51
9	Steinar Simonnes	402	Haskell	2024-07-18 17:12:25
10	Mason Barnhill	412	Haskell	2023-04-17 17:50:14

#	User	Length	Language	Date
1	Lincoln Craddock	255	Java	2025-09-09 19:38:47
2	Eric Leow Yu Quan	407	Java	2020-11-30 15:24:20
3	LovetheFrogs	419	Java	2023-07-29 15:50:58
4	Prakash Sanyasi	437	Java	2018-10-13 23:28:03
5	Dỗn Lùng	448	Java	2018-10-25 15:12:51
6	Son Lam Hai	450	Java	2018-10-25 19:28:46
7	Ali Pervaiz	466	Java	2019-03-25 14:38:19
8	Frank Ruskey	476	Java	2018-09-26 21:46:53
9	Anand Iyer	476	Java	2019-01-17 05:48:32
10	Hidden user	479	Java	2017-05-18 19:10:36

#	User	Length	Language	Date
1	BRYAN DAVID ALVAREZ GALVIS	597	JavaScript (Node.js)	2024-03-17 22:40:19
2	Chris Wong	660	JavaScript (Node.js)	2021-02-17 12:42:21
3	Andoko Chandra	675	JavaScript (Node.js)	2020-10-11 13:42:41
4	Howard Tin Chi Chan	788	JavaScript (Node.js)	2021-03-05 09:31:29
5	John	1236	JavaScript (Node.js)	2021-04-15 08:03:56
6	Carl Sundvall	1346	JavaScript (Node.js)	2018-11-13 15:12:23
7	Hidden user	2194	JavaScript (Node.js)	2024-11-05 06:37:46
8	Gurpartap Singh Bhatti	2253	JavaScript (Node.js)	2019-03-08 06:54:01

#	User	Length	Language	Date
1	Jimmy Gustafsson	122	JavaScript (SpiderMonkey)	2024-07-15 00:06:56
2	Nguyễn Hùng Cường	222	JavaScript (SpiderMonkey)	2018-09-04 10:26:26
3	Bjørn Chr. Soltvedt	255	JavaScript (SpiderMonkey)	2017-06-07 02:59:51
4	Peter Kedemo	268	JavaScript (SpiderMonkey)	2017-06-04 15:59:41
5	Christian Pilegaard Cederquist	269	JavaScript (SpiderMonkey)	2023-01-13 22:33:40
6	Peter Menyes	404	JavaScript (SpiderMonkey)	2021-08-15 12:23:25
7	Andrea Bianchessi	449	JavaScript (SpiderMonkey)	2018-08-21 22:39:17
8	Nicklas Utgaard	607	JavaScript (SpiderMonkey)	2018-06-25 22:58:01

#	User	Length	Language	Date
1	Danny Robinson	73	Julia	2023-09-26 05:36:12
2	Timothy Gaede	859	Julia	2024-04-02 07:39:37

#	User	Length	Language	Date
1	Jacob Huebner	318	Kotlin	2020-06-26 08:48:27
2	Einar Kjellback	323	Kotlin	2019-12-09 19:56:13
3	Emil Wihlander	341	Kotlin	2023-07-27 15:01:55
4	Jahid Hasan Imon	402	Kotlin	2020-05-25 23:01:19
5	Sergey Jakobsen	417	Kotlin	2021-03-08 20:48:54
6	Troy Warmboe	435	Kotlin	2020-02-08 00:14:12
7	Gaurav Tyagi	598	Kotlin	2018-08-13 09:48:05
8	Merih Bora Poçan	744	Kotlin	2020-08-02 23:32:51
9	Adam Rankin	865	Kotlin	2023-04-25 20:16:13
10	Neil Harmon	1102	Kotlin	2019-04-08 14:27:21

#	User	Length	Language	Date
1	Pamidimarri Reshwanth	800	Objective-C	2020-08-19 13:35:43

#	User	Length	Language	Date
1	Brandon Tang	388	OCaml	2023-09-24 05:25:10
2	Sebastian Banert	399	OCaml	2024-08-05 19:53:20

#	User	Length	Language	Date
1	Ingemar Ragnemalm	286	Pascal	2018-04-12 11:01:57
2	David Connolly	369	Pascal	2022-07-08 17:10:27

#	User	Length	Language	Date
1	Renate	258	PHP	2021-11-13 22:01:21
2	Emil Riis Hansen	1159	PHP	2018-10-30 10:33:40
3	Andre Wahyudi	2763	PHP	2023-03-15 06:11:46

#	User	Length	Language	Date
1	Andriy Zyevakov	201	Prolog	2018-11-12 15:12:47
2	Hakan Kjellerstrand	555	Prolog	2023-02-10 18:18:31

#	User	Length	Language	Date
1	Thomas Feld	136	Python 2	2019-09-02 12:09:35
2	Hidden user	154	Python 2	2018-01-07 10:02:55
3	Jesper Öqvist	161	Python 2	2018-10-19 22:24:04
4	Cheng Hang	165	Python 2	2017-12-06 07:54:19
5	Agis Daniels	174	Python 2	2019-12-16 18:54:05
6	William Gan	193	Python 2	2018-07-15 05:59:29
7	Andreas Björklund	218	Python 2	2021-03-27 17:06:19
8	Guan Yang Ze	235	Python 2	2020-03-17 17:52:48
9	Sigurður Jens Albertsson	242	Python 2	2018-10-04 19:57:27
10	Frederik Højholt	254	Python 2	2018-07-19 09:30:39

#	User	Length	Language	Date
1	Nguyên Khôi Đỗ	87	Python 3	2025-01-11 23:17:15
2	Russell Ng	87	Python 3	2025-05-28 03:59:05
3	Hidden user	94	Python 3	2026-01-19 14:39:33
4	Morten Clausen	97	Python 3	2022-10-25 16:31:36
5	Charles Ancheta	97	Python 3	2023-03-28 09:41:19
6	Harry Zhang	105	Python 3	2022-12-31 02:28:43
7	Eduardo Vicente Petry	105	Python 3	2023-03-05 22:47:56
8	Ahmed Chamseddine	105	Python 3	2023-10-13 19:20:02
9	Timothy Baeckelant	105	Python 3	2024-04-15 01:34:34
10	Akeyla Pradia Naufal	105	Python 3	2025-04-05 07:47:39

#	User	Length	Language	Date
1	Thomas Feld	90	Ruby	2022-11-25 10:44:17
2	Hidden user	121	Ruby	2021-02-17 15:24:34
3	Paul Vinell	201	Ruby	2018-05-12 21:35:22
4	Andreas Severin Hauch Trøstrup	277	Ruby	2022-08-31 20:03:43

#	User	Length	Language	Date
1	Vincent Lagerros	365	Rust	2025-03-04 20:04:08
2	Freek van Keulen	558	Rust	2021-07-22 19:50:08
3	Pankajkumar Patro	635	Rust	2024-08-25 22:53:42
4	David Zacek	643	Rust	2021-05-27 22:34:55
5	Bas Dirks	806	Rust	2022-01-02 21:13:34
6	Hidden user	821	Rust	2026-01-29 17:59:34
7	Morten Raeburn	855	Rust	2021-11-16 03:27:41
8	Kok Dith	881	Rust	2021-08-11 03:44:16
9	Isak Jägberg	1238	Rust	2024-10-21 12:06:17
10	Joe Blower	1831	Rust	2025-12-25 17:37:59

Solution running time distribution