Problem A
The Backslash Problem — Problem Statistics

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Submissions	1307
Accepted submissions	672
Submission ratio	51.42%
Authors	636
Accepted authors	585
Author ratio	91.98%

#	User	Runtime	Language	Date
1	Danny Robinson	0.01	Bash	2023-09-28 09:29:19

#	User	Runtime	Language	Date
1	Andrew Roberts	0	C	2017-10-08 08:09:38
2	Hidden user	0	C	2017-12-01 09:38:59
3	Sambit Palit	0	C	2020-09-30 20:36:02
4	Mikael K Eriksson	0	C	2021-05-20 22:40:28
5	Filip Stenström	0.06	C	2018-04-11 08:31:09

#	User	Runtime	Language	Date
1	Khin Nyunt	0.02	C#	2016-04-24 14:10:04
2	Andrzej Krajniak	0.02	C#	2016-08-04 22:41:59
3	Pavel Volgarev	0.02	C#	2016-11-24 05:00:18
4	Mikael Fiala-Lundström	0.03	C#	2021-05-23 14:21:59
5	traxex	0.05	C#	2024-05-28 13:04:41
6	Håvard Stuberg	0.06	C#	2019-05-18 18:52:03
7	Göran Andersson	0.08	C#	2022-05-24 02:36:26
8	Doug Goodman	0.45	C#	2018-06-15 23:37:32

#	User	Runtime	Language	Date
1	David Cawthon	0.03	Common Lisp	2019-05-11 15:21:00

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.03	F#	2023-01-05 17:33:37

#	User	Runtime	Language	Date
1	Norbert Voelker	0.02	Go	2021-05-23 23:36:25

#	User	Runtime	Language	Date
1	vagabundus	0	Haskell	2024-05-04 15:05:40
2	Patrik Lilja	0.01	Haskell	2016-05-01 19:52:43
3	Brent Yorgey	0.01	Haskell	2017-10-31 12:00:55
4	Hidden user	0.01	Haskell	2019-10-24 21:33:23
5	Sergio Martín Sempere	0.01	Haskell	2020-10-13 08:37:03
6	Ricardo Borillo	0.01	Haskell	2020-10-14 14:06:08
7	Andrés Marzal Varó	0.01	Haskell	2020-10-14 17:19:21
8	Juan Miguel Vilar	0.01	Haskell	2020-10-14 17:54:51
9	Francisco González	0.01	Haskell	2020-10-17 17:10:27
10	Jan Hrček	0.01	Haskell	2021-04-09 05:52:50

#	User	Runtime	Language	Date
1	Hidden user	0.05	Java	2024-08-19 00:48:05
2	Erik Nyström	0.06	Java	2016-03-13 11:31:20
3	Simon Xue	0.06	Java	2016-04-12 06:18:58
4	Paul Boddington	0.06	Java	2016-05-05 17:57:43
5	Martijn Muijsers	0.06	Java	2016-10-05 21:05:27
6	Michel Langeveld	0.06	Java	2016-11-10 21:23:30
7	Micah Stairs	0.06	Java	2016-11-25 01:53:39
8	Finn Lidbetter	0.06	Java	2017-02-09 00:57:27
9	Steven Cheng	0.06	Java	2017-11-20 06:48:37
10	Hidden user	0.06	Java	2018-01-22 21:41:30

#	User	Runtime	Language	Date
1	Dag Jomar Mersland	0.07	JavaScript (Node.js)	2019-04-05 19:22:07
2	Hallvard Braaten	0.07	JavaScript (Node.js)	2019-04-05 19:22:41
3	Quinn Flavel	0.41	JavaScript (Node.js)	2020-10-22 05:24:25
4	Khin Nyunt	0.43	JavaScript (Node.js)	2021-12-10 13:32:43

#	User	Runtime	Language	Date
1	Peter Kedemo	0.01	JavaScript (SpiderMonkey)	2016-04-12 21:39:43
2	Michael Laszlo	0.01	JavaScript (SpiderMonkey)	2016-10-03 05:35:00
3	Bjørn Chr. Soltvedt	0.02	JavaScript (SpiderMonkey)	2016-01-21 04:21:06
4	Paul Leung	0.02	JavaScript (SpiderMonkey)	2017-03-29 18:00:20
5	Christian Cederquist	0.03	JavaScript (SpiderMonkey)	2023-03-01 19:56:13
6	Bernard Perrin	0.04	JavaScript (SpiderMonkey)	2019-11-05 16:53:27

#	User	Runtime	Language	Date
1	Danny Robinson	0.55	Julia	2023-09-28 09:16:29

#	User	Runtime	Language	Date
1	Dayan Ruben Gonzalez	0.21	Kotlin	2020-09-29 16:23:57
2	Neil Harmon	0.22	Kotlin	2019-07-03 09:15:01
3	Adam Rankin	0.22	Kotlin	2023-09-08 18:53:14
4	Adam Koprowski	0.23	Kotlin	2021-12-23 22:17:24
5	Colin Gay	0.32	Kotlin	2019-05-25 03:49:49
6	5Head	0.52	Kotlin	2019-09-18 03:19:09

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0	Pascal	2018-12-17 23:21:53

#	User	Runtime	Language	Date
1	Susanne Ragnemalm	0.02	PHP	2018-04-21 20:19:43

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.04	Prolog	2019-05-06 17:45:34

#	User	Runtime	Language	Date
1	Nathan Collins	0.02	Python 3	2016-08-19 17:07:53
2	Christian Lindeström	0.02	Python 3	2016-09-20 18:17:50
3	John William O'Rourke	0.02	Python 3	2016-09-25 22:08:51
4	Graeme Zinck	0.02	Python 3	2017-02-09 01:40:14
5	David Brink	0.02	Python 3	2017-02-18 11:39:35
6	Rick May	0.02	Python 3	2017-02-24 01:38:27
7	Ram Basnet	0.02	Python 3	2017-03-04 06:20:16
8	Hyaline Seiche	0.02	Python 3	2017-05-22 21:13:02
9	Jón Steinn Elíasson	0.02	Python 3	2017-06-21 19:17:56
10	Lara Jerač	0.02	Python 3	2017-09-05 21:27:38

#	User	Runtime	Language	Date
1	Foo Bar	0.05	Ruby	2018-10-24 17:43:39
2	Thomas Feld	0.06	Ruby	2023-03-30 08:40:12
3	Macdara mac an tSionnaigh	0.07	Ruby	2019-11-25 17:53:41
4	Hidden user	0.08	Ruby	2019-05-08 13:12:53

#	User	Runtime	Language	Date
1	Bas Dirks	0	Rust	2022-01-08 23:40:45
2	Artur Khuziakhmetov	0	Rust	2022-07-28 19:25:22
3	David Rasch	0	Rust	2022-10-17 20:30:38
4	Ethan South	0	Rust	2023-11-14 23:42:42
5	Eric Pinter	0.01	Rust	2021-10-17 21:04:10

#	User	Length	Language	Date
1	Danny Robinson	63	Bash	2023-09-28 09:29:19

#	User	Length	Language	Date
1	Hidden user	549	C	2017-12-01 09:38:59
2	Mikael K Eriksson	925	C	2021-05-20 22:40:28
3	Andrew Roberts	1007	C	2017-10-08 08:09:38
4	Sambit Palit	1052	C	2020-09-30 20:36:02
5	Filip Stenström	2541	C	2018-04-11 08:31:09

#	User	Length	Language	Date
1	traxex	347	C#	2024-05-28 13:04:41
2	Göran Andersson	512	C#	2022-05-24 02:36:26
3	Doug Goodman	784	C#	2018-06-15 23:37:32
4	Khin Nyunt	1010	C#	2016-04-24 16:49:14
5	Håvard Stuberg	1077	C#	2019-05-18 18:52:56
6	Mikael Fiala-Lundström	2722	C#	2021-05-23 14:21:59
7	Pavel Volgarev	3348	C#	2016-11-24 05:00:18
8	Andrzej Krajniak	4139	C#	2016-08-04 22:41:59

#	User	Length	Language	Date
1	Yeung Man Tsung	319	C++	2022-12-01 08:50:25
2	William Gan	375	C++	2018-03-10 11:02:29
3	人外沙耶	387	C++	2020-11-17 08:36:46
4	bekarhunmain	389	C++	2024-08-24 09:00:57
5	Daniel German	396	C++	2017-02-23 07:28:53
6	Frederick Pek	401	C++	2021-06-22 09:19:58
7	Rendy Ardianto	408	C++	2019-11-01 13:43:09
8	Andrei Ciocan	410	C++	2024-02-12 21:08:40
9	Mihai Razvan	412	C++	2024-01-29 09:48:54
10	Tony Tony	416	C++	2017-12-30 12:02:42

#	User	Length	Language	Date
1	David Cawthon	657	Common Lisp	2019-05-11 15:21:00

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	934	F#	2023-01-05 17:33:37

#	User	Length	Language	Date
1	Norbert Voelker	1075	Go	2021-05-23 23:36:25

#	User	Length	Language	Date
1	Patrik Lilja	412	Haskell	2016-05-01 19:52:43
2	Juan Miguel Vilar	428	Haskell	2020-10-14 17:54:51
3	Brent Yorgey	467	Haskell	2017-10-31 12:00:55
4	Fulano de Tal	592	Haskell	2022-01-17 01:43:04
5	Jan Hrček	606	Haskell	2021-04-09 05:52:50
6	Andrés Marzal Varó	636	Haskell	2020-10-14 17:19:21
7	Sergio Martín Sempere	720	Haskell	2020-10-13 08:37:03
8	Ricardo Borillo	791	Haskell	2020-10-14 14:06:08
9	vagabundus	801	Haskell	2024-05-04 15:05:40
10	Steinar Simonnes	810	Haskell	2024-02-28 11:27:26

#	User	Length	Language	Date
1	Raymond Arrington	472	Java	16:59:12
2	Mitch Price	556	Java	2016-09-25 22:01:09
3	Alexander Cairns	572	Java	2019-10-05 00:26:55
4	Xuehui Chen	579	Java	2018-05-13 17:32:28
5	Qritel Abdelilah	587	Java	2018-01-07 16:20:29
6	Anirudh Rahul	612	Java	2016-09-28 21:28:43
7	Brendon Zhang	647	Java	2019-01-24 01:47:27
8	Abel Zeleke	652	Java	2022-07-15 21:18:19
9	Pedro Contipelli	653	Java	2016-08-17 04:36:12
10	Frank Ruskey	668	Java	2017-01-18 03:16:16

#	User	Length	Language	Date
1	Quinn Flavel	568	JavaScript (Node.js)	2020-10-22 05:24:25
2	Hallvard Braaten	864	JavaScript (Node.js)	2019-04-05 19:22:41
3	Khin Nyunt	1247	JavaScript (Node.js)	2021-12-10 13:32:43
4	Dag Jomar Mersland	1362	JavaScript (Node.js)	2019-04-05 19:22:07

#	User	Length	Language	Date
1	Peter Kedemo	178	JavaScript (SpiderMonkey)	2016-04-12 21:39:43
2	Christian Cederquist	370	JavaScript (SpiderMonkey)	2023-03-01 19:56:13
3	Bjørn Chr. Soltvedt	434	JavaScript (SpiderMonkey)	2016-01-21 04:21:06
4	Bernard Perrin	438	JavaScript (SpiderMonkey)	2019-11-05 16:53:27
5	Paul Leung	813	JavaScript (SpiderMonkey)	2017-03-29 18:00:20
6	Michael Laszlo	880	JavaScript (SpiderMonkey)	2016-10-03 05:35:00

#	User	Length	Language	Date
1	Danny Robinson	123	Julia	2023-09-28 09:16:29

#	User	Length	Language	Date
1	Adam Koprowski	447	Kotlin	2021-12-23 22:17:24
2	Dayan Ruben Gonzalez	476	Kotlin	2020-09-29 16:23:57
3	Colin Gay	529	Kotlin	2019-05-25 03:49:49
4	Adam Rankin	674	Kotlin	2023-09-08 18:53:14
5	5Head	715	Kotlin	2019-09-18 03:19:09
6	Neil Harmon	916	Kotlin	2019-07-03 09:15:01

#	User	Length	Language	Date
1	Ingemar Ragnemalm	675	Pascal	2018-12-17 23:21:53

#	User	Length	Language	Date
1	Susanne Ragnemalm	590	PHP	2018-04-21 20:19:43

#	User	Length	Language	Date
1	Andriy Zyevakov	1210	Prolog	2019-05-06 17:45:34

#	User	Length	Language	Date
1	Tai Tze Kin	156	Python 3	2024-05-08 09:57:32
2	Clement Oh	159	Python 3	2023-11-11 05:57:39
3	Vedran Čačić	183	Python 3	2019-03-22 00:58:01
4	Hidden user	183	Python 3	2021-02-17 15:45:04
5	Simon Baeckelant	195	Python 3	2024-05-12 08:48:29
6	Thibault Raffaillac	198	Python 3	2020-09-29 16:00:08
7	Will Killian	199	Python 3	2022-11-22 18:18:58
8	William Taylor-Melanson	210	Python 3	2019-09-18 23:16:43
9	Nathan Collins	215	Python 3	2016-08-19 17:07:53
10	Manu Lam	215	Python 3	2018-03-14 21:38:15

#	User	Length	Language	Date
1	Thomas Feld	60	Ruby	2023-03-30 08:42:44
2	Foo Bar	291	Ruby	2018-10-24 17:43:39
3	Hidden user	300	Ruby	2019-05-08 13:12:53
4	Macdara mac an tSionnaigh	405	Ruby	2019-11-25 17:52:19

#	User	Length	Language	Date
1	Artur Khuziakhmetov	565	Rust	2022-07-28 19:25:22
2	David Rasch	642	Rust	2022-10-17 20:30:38
3	Bas Dirks	807	Rust	2022-01-08 23:40:45
4	Eric Pinter	1168	Rust	2021-10-17 21:04:10
5	Ethan South	7220	Rust	2023-11-14 23:42:42

Solution running time distribution