Problem A
I Repeat Myself I Repeat Myself I Repeat — Problem Statistics

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Submissions	3127
Accepted submissions	1424
Submission ratio	45.54%
Authors	1253
Full solves [?]	1122
Full solve Ratio	89.55%

#	User	Runtime	Language	Date
1	Matzuka	0.04 s	APL	2025-03-21 10:43:17

#	User	Runtime	Language	Date
1	Chenzhang Hu	0.07 s	Bash	2025-09-13 04:38:33

#	User	Runtime	Language	Date
1	Adam Evans	0.00 s	C	2016-04-06 05:34:27
2	Hidden user	0.00 s	C	2017-07-17 06:59:00
3	应泽良	0.00 s	C	2017-09-29 16:56:35
4	Hidden user	0.00 s	C	2017-11-17 05:22:37
5	Noah Ó Donnaile	0.00 s	C	2018-08-07 18:40:31
6	Isaac Pashenkov	0.00 s	C	2020-08-26 23:20:48
7	Albert Lai	0.00 s	C	2020-11-04 23:44:43
8	Pontus Asservik	0.00 s	C	2025-04-01 12:09:39

#	User	Runtime	Language	Date
1	Pavel Volgarev	0.02 s	C#	2016-10-14 22:08:05
2	Marek	0.02 s	C#	2016-10-19 22:12:57
3	Greg Roderick	0.02 s	C#	2016-10-29 12:56:41
4	Przemysław Curzytek	0.02 s	C#	2016-11-07 06:34:24
5	Khin Nyunt	0.02 s	C#	2017-06-03 07:41:52
6	Nelson Penn	0.02 s	C#	2017-09-21 17:00:09
7	Mikael Fiala-Lundström	0.02 s	C#	2021-11-02 02:08:36
8	Göran Andersson	0.02 s	C#	2022-05-30 17:28:51
9	Mads Storm Hansen	0.03 s	C#	2015-07-21 18:06:32
10	Adam Mellen	0.03 s	C#	2017-09-29 13:51:57

#	User	Runtime	Language	Date
1	David Cawthon	0.01 s	Common Lisp	2020-07-05 02:07:42

#	User	Runtime	Language	Date
1	dick move	0.00 s	Crystal	2025-10-16 09:07:49

#	User	Runtime	Language	Date
1	Jesper Bech Christensen	0.03 s	F#	2022-04-05 13:04:03
2	Jacob Harris Cryer Kragh	0.04 s	F#	2022-12-12 18:27:13

#	User	Runtime	Language	Date
1	Einar Andri Víðisson	0.00 s	Go	2025-01-28 01:03:54
2	Joseph Winkie	0.00 s	Go	2025-03-01 12:10:10
3	Norbert Voelker	0.02 s	Go	2021-07-12 22:06:19
4	Hidden user	0.08 s	Go	2019-10-03 19:42:35
5	Hidden user	0.08 s	Go	2022-04-13 23:16:35

#	User	Runtime	Language	Date
1	Brent Yorgey	0.00 s	Haskell	2017-11-10 19:46:06
2	Paul Wild	0.00 s	Haskell	2018-05-16 17:09:15
3	Mitch Stevens	0.00 s	Haskell	2025-06-19 14:24:12
4	David Wärn	0.01 s	Haskell	2015-05-10 18:04:02
5	Lars Tveito	0.01 s	Haskell	2015-09-14 16:50:49
6	姚锦铭	0.01 s	Haskell	2017-08-16 19:01:52
7	Hidden user	0.01 s	Haskell	2019-11-03 15:11:28
8	Ted Bjurlin	0.01 s	Haskell	2024-04-17 00:08:21
9	Fay Carsons	0.01 s	Haskell	2025-07-07 17:41:56

#	User	Runtime	Language	Date
1	Joshua Chin	0.04 s	Java	2025-06-13 19:34:31
2	Simon Xue	0.05 s	Java	2016-03-15 05:32:18
3	Martijn Muijsers	0.05 s	Java	2016-10-27 13:32:06
4	José Vander Meulen	0.05 s	Java	2018-02-03 22:08:09
5	Taras Romanyuk	0.05 s	Java	2024-10-16 20:01:31
6	Reuben James Loquinario	0.05 s	Java	2024-11-07 17:14:41
7	Cesar Gonzalez	0.05 s	Java	2025-11-03 19:41:10
8	Martin Wiberg Petersen	0.06 s	Java	2016-04-25 19:58:06
9	Micah Stairs	0.06 s	Java	2016-08-16 20:50:44
10	Marco Troltsch	0.06 s	Java	2016-10-16 19:41:44

#	User	Runtime	Language	Date
1	Ram Basnet	0.06 s	JavaScript (Node.js)	2018-09-24 03:47:39
2	Jesper Svendgaard Åhman Hansen	0.09 s	JavaScript (Node.js)	2023-01-29 18:00:04
3	Khin Nyunt	0.42 s	JavaScript (Node.js)	2021-11-20 17:58:01

#	User	Runtime	Language	Date
1	Oskar	0.01 s	JavaScript (SpiderMonkey)	2015-09-15 22:28:21
2	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2016-02-21 16:08:45
3	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-03-24 01:45:35
4	Paul Leung	0.01 s	JavaScript (SpiderMonkey)	2017-09-25 17:33:29
5	Zach Tschetter	0.02 s	JavaScript (SpiderMonkey)	2023-06-23 22:02:59
6	Christian Pilegaard Cederquist	0.03 s	JavaScript (SpiderMonkey)	2023-02-23 12:29:13

#	User	Runtime	Language	Date
1	Timothy Gaede	0.51 s	Julia	2024-06-06 15:00:47

#	User	Runtime	Language	Date
1	Marcin Wiśniowski	0.18 s	Kotlin	2017-09-29 15:52:19
2	Dayan Ruben Gonzalez	0.22 s	Kotlin	2020-09-29 04:04:36
3	Neil Harmon	0.23 s	Kotlin	2019-11-29 08:41:16
4	Matthew Lutze	0.25 s	Kotlin	2019-09-26 08:39:39
5	Adam Rankin	0.27 s	Kotlin	2023-05-05 20:31:18
6	Troy Warmboe	0.28 s	Kotlin	2020-03-12 01:28:35

#	User	Runtime	Language	Date
1	Óðinn Ágústsson	0.01 s	Lua	2025-01-28 15:23:14

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Nim	2025-05-26 11:10:14

#	User	Runtime	Language	Date
1	Joel Newman	0.00 s	OCaml	2023-11-05 00:40:05

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2017-09-23 08:29:34

#	User	Runtime	Language	Date
1	Susanne Ragnemalm	0.01 s	PHP	2018-04-06 19:51:34

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.03 s	Prolog	2019-07-13 09:08:32
2	Hadi Qovaizi	0.04 s	Prolog	2018-07-02 05:45:48

#	User	Runtime	Language	Date
1	Tore Norderud	0.03 s	Python 2	2015-09-18 23:37:09
2	Team Baud	0.03 s	Python 2	2015-09-29 19:28:00
3	Patrik Lilja	0.03 s	Python 2	2015-10-15 20:51:08
4	Alvaro Silvino	0.03 s	Python 2	2016-03-25 14:25:32
5	Hidden user	0.03 s	Python 2	2016-07-10 19:15:33
6	Neal Zane	0.03 s	Python 2	2016-08-08 03:07:22
7	Hubert Teo	0.03 s	Python 2	2016-08-12 10:59:54
8	Erik Sillén	0.03 s	Python 2	2016-08-17 22:56:41
9	Jennie Olsson	0.03 s	Python 2	2016-08-26 08:47:27
10	Bridger Howell	0.03 s	Python 2	2016-09-08 06:00:14

#	User	Runtime	Language	Date
1	James Elías Sigurðarson	0.02 s	Python 3	2015-06-15 12:22:28
2	Tammo Behrends	0.02 s	Python 3	2015-11-28 19:16:45
3	Nathan Collins	0.02 s	Python 3	2016-05-19 16:41:07
4	Christian Lindeström	0.02 s	Python 3	2016-09-09 00:44:14
5	Jón Benediktsson	0.02 s	Python 3	2017-02-10 20:16:56
6	Benedikt Aron Sigurþórsson	0.02 s	Python 3	2017-02-13 19:03:35
7	David Bjarki Jonsson	0.02 s	Python 3	2017-02-13 19:06:40
8	David Brink	0.02 s	Python 3	2017-02-18 11:07:42
9	Sebastian Dolan	0.02 s	Python 3	2017-04-29 22:33:46
10	Jón Steinn Elíasson	0.02 s	Python 3	2017-06-15 10:10:30

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	Ruby	2019-12-17 00:53:10
2	Thomas Feld	0.06 s	Ruby	2023-02-09 09:27:56
3	Chenzhang Hu	0.07 s	Ruby	2024-06-03 18:47:42

#	User	Runtime	Language	Date
1	Bas Dirks	0.00 s	Rust	2022-01-18 22:41:21
2	Vincent Lagerros	0.00 s	Rust	2024-11-17 01:28:51
3	Hidden user	0.00 s	Rust	2025-08-03 08:49:19

#	User	Runtime	Language	Date
1	Oleksii Ihnatenko	0.00 s	Zig	2025-07-14 23:56:49

#	User	Length	Language	Date
1	Matzuka	155	APL	2025-03-21 10:43:17

#	User	Length	Language	Date
1	Chenzhang Hu	51	Bash	2025-09-13 04:38:33

#	User	Length	Language	Date
1	Hidden user	579	C	2017-11-17 05:22:37
2	Adam Evans	700	C	2016-04-06 05:34:27
3	Noah Ó Donnaile	850	C	2018-08-07 18:40:31
4	Albert Lai	874	C	2020-11-04 23:44:43
5	Isaac Pashenkov	1251	C	2020-08-26 23:20:48
6	应泽良	1364	C	2017-09-29 16:56:35
7	Hidden user	2074	C	2017-07-17 06:59:00
8	Pontus Asservik	3870	C	2025-04-01 12:09:39

#	User	Length	Language	Date
1	traxex	433	C#	2024-05-16 18:57:00
2	Göran Andersson	685	C#	2022-05-30 17:28:51
3	Khin Nyunt	720	C#	2017-06-03 07:41:52
4	Walkyria Audivert Lino	727	C#	2025-06-20 22:32:54
5	Gustav Kalander	938	C#	2018-02-23 20:15:14
6	Marek	1035	C#	2016-10-19 22:12:57
7	Adam Mellen	1154	C#	2017-09-29 13:51:57
8	Pavel Volgarev	1309	C#	2016-10-14 22:08:05
9	Gerhard Kloppers	1319	C#	2025-03-16 15:55:19
10	Mads Storm Hansen	1464	C#	2015-07-21 18:06:32

#	User	Length	Language	Date
1	James Tan	325	C++	2024-10-25 14:27:57
2	Johan Wind	339	C++	2018-04-27 18:12:51
3	Veigar Elí Grétarsson	378	C++	2024-09-03 01:24:28
4	William Gan	405	C++	2016-03-26 13:06:55
5	Đoàn Công Chính	416	C++	2018-02-04 10:28:06
6	Yusan Leung Liu	420	C++	2015-11-04 20:02:58
7	Austin Fernandez	428	C++	2019-09-26 18:49:08
8	Mike Gao	430	C++	2021-11-05 22:04:20
9	Marcel Wienöbst	433	C++	2025-07-04 15:10:06
10	Leonardo Blanger	435	C++	2021-02-10 02:39:38

#	User	Length	Language	Date
1	David Cawthon	734	Common Lisp	2020-07-05 02:07:42

#	User	Length	Language	Date
1	dick move	173	Crystal	2025-10-16 09:07:49

#	User	Length	Language	Date
1	Jesper Bech Christensen	423	F#	2022-04-05 13:04:03
2	Jacob Harris Cryer Kragh	786	F#	2022-12-12 18:27:13

#	User	Length	Language	Date
1	Hidden user	423	Go	2022-04-13 23:16:35
2	Einar Andri Víðisson	654	Go	2025-01-28 01:03:54
3	Norbert Voelker	717	Go	2021-07-12 22:06:19
4	Hidden user	1240	Go	2019-10-03 19:42:35
5	Joseph Winkie	1362	Go	2025-03-01 12:10:10

#	User	Length	Language	Date
1	Paul Wild	146	Haskell	2018-05-16 17:09:15
2	David Wärn	152	Haskell	2015-05-10 18:04:02
3	Fay Carsons	307	Haskell	2025-07-07 17:41:56
4	Lars Tveito	330	Haskell	2015-09-14 16:50:49
5	Mitch Stevens	431	Haskell	2025-06-19 14:24:35
6	姚锦铭	477	Haskell	2017-08-16 19:01:52
7	Ted Bjurlin	541	Haskell	2024-04-17 00:08:21
8	Brent Yorgey	692	Haskell	2017-11-10 19:46:06
9	Hidden user	8766	Haskell	2019-11-03 15:14:56

#	User	Length	Language	Date
1	Khin Nyunt	466	Java	2017-11-08 16:36:58
2	Doug Goodman	504	Java	2018-01-04 17:27:16
3	Zoe Ho	566	Java	2022-11-21 20:56:48
4	Micah Stairs	568	Java	2016-08-16 20:50:44
5	Benjamin Lo	579	Java	2021-11-05 22:54:32
6	Erik Baalhuis	590	Java	2016-08-16 05:31:47
7	Yijia Jing	593	Java	2021-03-15 13:52:39
8	Hidden user	623	Java	2018-06-11 22:10:35
9	José Vander Meulen	632	Java	2018-02-03 21:52:50
10	Paul Boddington	633	Java	2016-05-02 17:26:09

#	User	Length	Language	Date
1	Ram Basnet	450	JavaScript (Node.js)	2018-09-24 03:47:39
2	Jesper Svendgaard Åhman Hansen	544	JavaScript (Node.js)	2023-01-29 18:07:16
3	Khin Nyunt	645	JavaScript (Node.js)	2021-11-20 17:58:01

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	305	JavaScript (SpiderMonkey)	2023-02-23 12:29:13
2	Paul Leung	306	JavaScript (SpiderMonkey)	2017-09-25 17:33:29
3	Peter Kedemo	440	JavaScript (SpiderMonkey)	2016-02-21 16:08:45
4	Zach Tschetter	474	JavaScript (SpiderMonkey)	2023-06-23 22:02:59
5	Oskar	590	JavaScript (SpiderMonkey)	2015-09-15 22:28:21
6	Bjørn Chr. Soltvedt	628	JavaScript (SpiderMonkey)	2016-03-24 01:45:35

#	User	Length	Language	Date
1	Timothy Gaede	876	Julia	2024-06-06 15:00:47

#	User	Length	Language	Date
1	Adam Rankin	402	Kotlin	2023-05-05 20:31:18
2	Troy Warmboe	444	Kotlin	2020-03-12 01:28:35
3	Dayan Ruben Gonzalez	534	Kotlin	2020-09-29 04:04:36
4	Matthew Lutze	672	Kotlin	2019-09-26 08:39:39
5	Marcin Wiśniowski	969	Kotlin	2017-09-29 15:52:19
6	Neil Harmon	1033	Kotlin	2019-11-29 08:41:16

#	User	Length	Language	Date
1	Óðinn Ágústsson	430	Lua	2025-01-28 15:23:14

#	User	Length	Language	Date
1	Hidden user	277	Nim	2025-05-26 11:10:14

#	User	Length	Language	Date
1	Joel Newman	686	OCaml	2023-11-05 00:40:05

#	User	Length	Language	Date
1	Ingemar Ragnemalm	682	Pascal	2017-09-23 08:29:34

#	User	Length	Language	Date
1	Susanne Ragnemalm	420	PHP	2018-04-06 19:51:34

#	User	Length	Language	Date
1	Andriy Zyevakov	687	Prolog	2019-07-13 09:08:32
2	Hadi Qovaizi	1885	Prolog	2020-06-12 17:18:24

#	User	Length	Language	Date
1	Thomas Feld	125	Python 2	2019-09-13 11:22:16
2	Herbert Ilhan Tanujaya	176	Python 2	2019-05-03 18:48:03
3	Andreas Eisele	184	Python 2	2018-09-07 15:26:28
4	Wang Zhi Jian	201	Python 2	2019-04-26 14:56:45
5	Johan Lyts	210	Python 2	2020-09-21 14:31:16
6	Hidden user	214	Python 2	2016-07-10 19:15:33
7	Andreas Björklund	223	Python 2	2020-03-12 21:24:08
8	Hubert Teo	237	Python 2	2016-08-12 10:59:54
9	Patrik Lilja	243	Python 2	2015-10-15 20:51:08
10	Tore Norderud	245	Python 2	2015-09-18 23:37:09

#	User	Length	Language	Date
1	Elias Lundell	71	Python 3	2023-07-16 22:42:21
2	Tobias Glimmerfors	71	Python 3	2023-07-16 22:44:47
3	Harry Zhang	80	Python 3	2023-07-16 22:51:15
4	Benjamin Z White	94	Python 3	2023-05-07 11:00:46
5	Clement Oh	98	Python 3	2023-05-25 19:08:49
6	Emil Sandberg	103	Python 3	2023-07-18 12:18:40
7	Sam Chen	113	Python 3	2025-11-06 20:52:07
8	Ahmed Chamseddine	118	Python 3	2023-09-01 16:23:25
9	Anton Maksinen	136	Python 3	2025-07-02 16:48:57
10	Si Jie Tan	138	Python 3	2026-01-11 05:17:18

#	User	Length	Language	Date
1	Chenzhang Hu	45	Ruby	2024-11-29 10:04:01
2	Thomas Feld	46	Ruby	2023-02-09 10:09:22
3	Hidden user	354	Ruby	2019-12-17 00:53:10

#	User	Length	Language	Date
1	Vincent Lagerros	427	Rust	2024-11-17 01:28:51
2	Bas Dirks	591	Rust	2022-01-18 22:41:21
3	Hidden user	1252	Rust	2025-08-03 08:49:19

#	User	Length	Language	Date
1	Oleksii Ihnatenko	1115	Zig	2025-07-14 23:56:49

Solution running time distribution