Problem A
Coloring Socks — Problem Statistics

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Submissions	10537
Accepted submissions	3498
Submission ratio	33.20%
Authors	2936
Full solves [?]	2655
Full solve Ratio	90.43%

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	C	2013-02-20 20:09:54
2	Steven Fontanella	0.02 s	C	2018-09-07 23:42:12
3	Mikkel Hooge Sørensen	0.02 s	C	2019-11-08 16:51:51
4	USaskAdvanced6	0.02 s	C	2020-02-15 19:19:40
5	vance	0.02 s	C	2020-03-10 07:03:23
6	Bergur Snorrason	0.02 s	C	2021-01-04 11:09:55
7	Raymond Yang	0.02 s	C	2021-06-18 22:42:08
8	Duane Currie	0.02 s	C	2021-09-21 22:21:01
9	Nazim Djeradi	0.02 s	C	2022-10-08 22:25:18
10	Alexander Bilde Pedersen	0.02 s	C	2023-04-05 22:28:49

#	User	Runtime	Language	Date
1	Andrzej Krajniak	0.06 s	C#	2016-09-21 17:56:08
2	Marek	0.06 s	C#	2016-09-21 18:17:52
3	Daniel Materowski	0.06 s	C#	2016-09-21 19:27:22
4	Piotr Włodek	0.06 s	C#	2016-09-21 20:41:40
5	Martynas Treinys	0.06 s	C#	2017-04-24 15:27:06
6	Albin Axtelius	0.06 s	C#	2018-02-24 13:05:25
7	Chase Oberg	0.06 s	C#	2018-04-24 14:46:10
8	Henrik Hallbert	0.06 s	C#	2019-02-03 10:33:03
9	Eli Vestin	0.06 s	C#	2019-02-04 13:27:34
10	Hidden user	0.06 s	C#	2024-06-04 10:18:08

#	User	Runtime	Language	Date
1	Alexander Kravberg	0.00 s	C++	2024-01-06 01:36:40
2	Joakim Blikstad	0.01 s	C++	2015-10-07 18:11:29
3	Johan Sannemo	0.01 s	C++	2015-10-25 00:21:28
4	Ragnar Groot Koerkamp	0.01 s	C++	2015-11-21 13:22:31
5	Hưng Lê	0.01 s	C++	2015-12-01 08:56:50
6	Hidden user	0.01 s	C++	2015-12-10 02:03:10
7	Erik Dackander	0.01 s	C++	2016-03-25 13:17:09
8	Vilius Pranckaitis	0.01 s	C++	2016-04-21 16:42:36
9	Vytautas	0.01 s	C++	2016-04-21 16:56:11
10	Bùi Việt Dũng	0.01 s	C++	2016-08-11 05:53:24

#	User	Runtime	Language	Date
1	Hidden user	0.22 s	Common Lisp	2019-06-26 23:39:33

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.12 s	F#	2022-12-28 10:28:29

#	User	Runtime	Language	Date
1	DIEGO SEBASTIAN JIMENEZ ARTIGA	0.02 s	Go	2025-04-26 16:12:32
2	Norbert Voelker	0.04 s	Go	2021-05-15 13:04:38
3	Daniel Agatan	0.06 s	Go	2025-02-25 09:04:15
4	Krzysztof Gibuła	0.10 s	Go	2021-05-20 23:24:05
5	Ainun Nazieb	0.12 s	Go	2020-09-30 13:46:03
6	Magnus C.F. Krøyer	0.92 s	Go	2019-08-31 11:33:14

#	User	Runtime	Language	Date
1	Md Akif Chowdhury	0.16 s	Haskell	2022-09-22 05:44:34
2	David Wärn	0.19 s	Haskell	2015-10-09 14:20:31
3	Hidden user	0.27 s	Haskell	2019-11-05 15:39:55
4	Kyler Smith	0.30 s	Haskell	2025-10-08 01:12:36
5	Frederik Haagensen	0.32 s	Haskell	2019-08-21 21:07:45
6	Antony Lee	0.33 s	Haskell	2018-02-16 13:35:50
7	Eric Huynh	0.33 s	Haskell	2018-05-01 20:29:49
8	Olle Eriksson	0.34 s	Haskell	2018-09-16 21:30:51
9	Brent Yorgey	0.35 s	Haskell	2018-04-14 07:26:18
10	A Q	0.36 s	Haskell	2018-09-05 01:30:19

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.07 s	Java	2024-12-11 18:54:37
2	Hidden user	0.09 s	Java	2016-08-20 15:26:04
3	Tuấn Nguyễn	0.09 s	Java	2017-09-28 15:01:35
4	Paul Boddington	0.11 s	Java	2016-05-05 20:02:05
5	William Fiset	0.13 s	Java	2017-02-21 22:04:23
6	Samuel Klingström	0.13 s	Java	2017-08-10 00:44:27
7	Nguyễn Hùng Cường	0.13 s	Java	2018-07-02 06:02:39
8	Joachim Borup	0.14 s	Java	2021-11-03 18:04:49
9	Dat Vo Nguyen Tien	0.14 s	Java	2022-01-30 13:32:57
10	Hidden user	0.14 s	Java	2026-03-15 15:46:32

#	User	Runtime	Language	Date
1	Minh Trang Nguyen	0.12 s	JavaScript (Node.js)	2025-10-27 14:58:00
2	Sander Hellesø	0.16 s	JavaScript (Node.js)	2019-05-01 22:37:45
3	Carl Sundvall	0.17 s	JavaScript (Node.js)	2019-02-03 11:53:45
4	Peter Kedemo	0.53 s	JavaScript (Node.js)	2020-01-14 12:53:40
5	Stephanie Keck	0.60 s	JavaScript (Node.js)	2020-02-18 06:02:27

#	User	Runtime	Language	Date
1	Hà Minh Ngọc	0.04 s	JavaScript (SpiderMonkey)	2016-07-28 08:05:01
2	Nguyễn Hùng Cường	0.05 s	JavaScript (SpiderMonkey)	2018-08-27 05:50:45
3	Christian Pilegaard Cederquist	0.05 s	JavaScript (SpiderMonkey)	2023-03-19 18:20:34
4	Bjørn Chr. Soltvedt	0.06 s	JavaScript (SpiderMonkey)	2020-03-02 16:07:59
5	Jimmy Gustafsson	0.07 s	JavaScript (SpiderMonkey)	2025-07-07 23:33:57

#	User	Runtime	Language	Date
1	Hidden user	0.46 s	Julia	2025-03-27 15:47:49
2	Timothy Gaede	0.60 s	Julia	2024-05-27 01:06:45

#	User	Runtime	Language	Date
1	Hidden user	0.27 s	Kotlin	2020-05-08 08:51:27
2	Mohsen Dehbashi	0.55 s	Kotlin	2019-07-06 11:40:14
3	Ryan Servera	0.56 s	Kotlin	2020-02-16 22:22:04
4	Sergey Jakobsen	0.59 s	Kotlin	2021-07-20 20:46:12
5	Adam Rankin	0.61 s	Kotlin	2023-08-31 03:15:27
6	Adrian Wireklint	0.84 s	Kotlin	2022-02-13 11:46:49

#	User	Runtime	Language	Date
1	Matthew Lutze	0.06 s	OCaml	2020-07-05 04:27:03

#	User	Runtime	Language	Date
1	Susanne Ragnemalm	0.08 s	PHP	2018-03-24 12:54:37
2	Ingemar Ragnemalm	0.11 s	PHP	2018-04-07 10:59:23

#	User	Runtime	Language	Date
1	Christofer Ohlsson	0.05 s	Python 2	2015-11-16 18:46:06
2	Karoliina Oksanen	0.05 s	Python 2	2016-03-16 00:35:04
3	Sigurður Jens Albertsson	0.05 s	Python 2	2018-02-18 15:26:15
4	Nicole Hedblom	0.05 s	Python 2	2018-02-18 21:20:36
5	Jordan James	0.05 s	Python 2	2018-02-21 06:25:00
6	Hidden user	0.05 s	Python 2	2018-02-24 11:48:20
7	Jay Deng	0.05 s	Python 2	2018-09-05 03:40:52
8	Jesper Öqvist	0.05 s	Python 2	2018-11-10 03:05:13
9	Klas af Geijerstam	0.05 s	Python 2	2018-11-10 19:56:16
10	Hermon Mulat	0.05 s	Python 2	2018-12-19 17:16:01

#	User	Runtime	Language	Date
1	Matthew Maatubang	0.06 s	Python 3	2019-04-23 23:11:25
2	Auburn Ford	0.06 s	Python 3	2019-10-06 22:01:54
3	Alex Lewin	0.06 s	Python 3	2019-10-07 23:37:51
4	Nathaniel Holeksa	0.06 s	Python 3	2019-10-08 05:19:45
5	Jiaqi Peng	0.06 s	Python 3	2019-10-10 05:39:12
6	Tim Hellemans	0.06 s	Python 3	2022-06-13 17:10:15
7	Christian Rivero	0.06 s	Python 3	2022-08-24 04:42:28
8	Jey Veerasamy	0.06 s	Python 3	2025-01-13 17:51:56
9	Markus	0.07 s	Python 3	2019-07-08 14:03:12
10	Rasmus Carl Rønneberg	0.07 s	Python 3	2019-09-23 16:32:48

#	User	Runtime	Language	Date
1	Josenildo Silva	0.08 s	Ruby	2018-01-09 23:39:49
2	Hidden user	0.09 s	Ruby	2019-10-04 19:28:34
3	Jan Schill	0.10 s	Ruby	2019-10-28 20:33:09
4	Jonathan Naumanen	0.11 s	Ruby	2024-02-11 15:50:37
5	Andreas Severin Hauch Trøstrup	0.11 s	Ruby	2024-09-10 16:29:04
6	Thomas Feld	0.12 s	Ruby	2023-05-04 10:11:05
7	Frederik Petersen	0.14 s	Ruby	2024-09-04 16:16:45

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.00 s	Rust	2024-08-23 23:52:20
2	Mathias Magnusson	0.01 s	Rust	2019-02-04 13:42:49
3	Magnus Jacobsen	0.01 s	Rust	2019-08-30 18:05:37
4	Bas Dirks	0.01 s	Rust	2022-02-28 17:35:09
5	Artur Khuziakhmetov	0.01 s	Rust	2022-07-23 10:46:04
6	Johan Flensmark	0.01 s	Rust	2022-09-10 11:11:45
7	Akemi Izuko	0.01 s	Rust	2022-09-23 22:11:04
8	David Rasch	0.01 s	Rust	2023-08-04 17:10:18
9	Albert Rise Nielsen	0.01 s	Rust	2024-09-20 18:12:31
10	Egor Kulikov	0.01 s	Rust	2025-01-10 19:00:39

#	User	Runtime	Language	Date
1	Arfat Hossain	0.12 s	TypeScript	2025-10-29 23:37:50

#	User	Length	Language	Date
1	Hidden user	588	C	2013-02-20 20:09:54
2	Raymond Yang	625	C	2021-06-18 22:42:08
3	Mirel Cosulschi	638	C	2024-07-24 18:50:34
4	Naveen Kumar S	652	C	2025-04-04 15:46:43
5	Ioannis Br	758	C	2023-08-12 00:02:11
6	Alexander Bilde Pedersen	793	C	2023-04-05 22:28:49
7	Max McGinty	793	C	2025-04-03 16:15:57
8	Duane Currie	830	C	2021-09-21 22:21:01
9	Hossein Eldelbani	877	C	2026-01-05 21:04:31
10	USaskAdvanced6	964	C	2020-02-15 19:19:40

#	User	Length	Language	Date
1	Göran Andersson	779	C#	2022-05-26 23:51:00
2	Ahmad Barhamje	880	C#	2022-12-07 11:38:43
3	Christoffer Nissen	921	C#	2019-11-17 15:53:56
4	Mac	925	C#	2022-08-20 23:39:23
5	Joel Fisser	939	C#	2020-07-06 14:19:34
6	Jonas Røygaard	952	C#	2019-10-21 00:29:09
7	Akib Ibn Zahid	966	C#	2025-10-27 15:09:45
8	Hidden user	989	C#	2024-06-04 10:18:08
9	Martin Holst	993	C#	2021-12-09 17:50:21
10	Laurens Fijn van Draat	998	C#	2020-07-06 14:27:27

#	User	Length	Language	Date
1	Quanmeng Wang	324	C++	2015-11-16 13:25:45
2	Matthew Tran	327	C++	2020-02-17 22:05:40
3	Aymane Moutei	332	C++	2025-03-28 11:29:15
4	Rafael Kristoforus Yanto	344	C++	2025-01-29 00:54:33
5	Andrey Chumachenko	356	C++	2017-11-24 18:25:33
6	Joel Niemelä	362	C++	2022-01-21 13:33:37
7	Howard Cheng	363	C++	2020-10-14 04:42:30
8	Hidden user	367	C++	2013-02-20 17:30:24
9	William Gan	370	C++	2017-02-17 10:05:18
10	Lim Hong Hui Eugene	370	C++	2017-02-24 10:34:18

#	User	Length	Language	Date
1	Hidden user	639	Common Lisp	2019-06-26 23:39:33

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	808	F#	2022-12-28 10:28:29

#	User	Length	Language	Date
1	Ainun Nazieb	674	Go	2020-09-30 13:46:03
2	Daniel Agatan	726	Go	2025-02-25 09:04:15
3	DIEGO SEBASTIAN JIMENEZ ARTIGA	839	Go	2025-04-26 16:47:32
4	Krzysztof Gibuła	941	Go	2021-05-20 23:24:05
5	Norbert Voelker	973	Go	2021-05-15 13:04:38
6	Magnus C.F. Krøyer	1131	Go	2019-08-31 11:33:14

#	User	Length	Language	Date
1	David Wärn	254	Haskell	2015-10-09 14:11:48
2	Antony Lee	358	Haskell	2018-02-16 13:35:50
3	Olle Eriksson	434	Haskell	2018-09-16 21:30:51
4	Brent Yorgey	485	Haskell	2018-04-14 07:26:18
5	A Q	544	Haskell	2018-09-05 01:30:19
6	Matthew Craven	685	Haskell	2018-09-15 17:32:42
7	Frederik Haagensen	820	Haskell	2019-08-21 20:36:20
8	Eric Huynh	1009	Haskell	2018-05-01 20:29:49
9	Kyler Smith	1227	Haskell	2025-10-08 01:12:36
10	Md Akif Chowdhury	1530	Haskell	2022-09-22 05:44:34

#	User	Length	Language	Date
1	Philip Blomholt	434	Java	2024-10-13 16:52:23
2	Doug Goodman	499	Java	2017-09-22 22:09:16
3	Eric Leow Yu Quan	562	Java	2020-12-26 08:32:43
4	Crystal Yang	584	Java	2023-05-05 05:00:46
5	Viet Dang	590	Java	2018-07-02 17:13:33
6	Hidden user	600	Java	2018-11-29 10:43:43
7	Fred Zhang	604	Java	2017-02-14 04:25:57
8	Jason Thomo	609	Java	2019-10-14 04:04:45
9	Danial Motamedi Mehr	610	Java	2020-02-16 20:54:11
10	Matthew Li	634	Java	2019-04-08 06:53:34

#	User	Length	Language	Date
1	Peter Kedemo	606	JavaScript (Node.js)	2020-01-14 12:53:40
2	Minh Trang Nguyen	646	JavaScript (Node.js)	2025-10-27 14:58:00
3	Sander Hellesø	1018	JavaScript (Node.js)	2019-05-01 22:37:45
4	Carl Sundvall	1102	JavaScript (Node.js)	2019-02-03 11:53:45
5	Stephanie Keck	5774	JavaScript (Node.js)	2020-02-18 06:02:27

#	User	Length	Language	Date
1	Jimmy Gustafsson	142	JavaScript (SpiderMonkey)	2025-07-07 23:33:57
2	Bjørn Chr. Soltvedt	313	JavaScript (SpiderMonkey)	2020-03-02 16:07:59
3	Christian Pilegaard Cederquist	331	JavaScript (SpiderMonkey)	2023-03-19 18:20:34
4	Nguyễn Hùng Cường	354	JavaScript (SpiderMonkey)	2018-08-27 05:50:45
5	Hà Minh Ngọc	634	JavaScript (SpiderMonkey)	2016-07-28 08:05:01

#	User	Length	Language	Date
1	Hidden user	247	Julia	2025-03-27 15:47:49
2	Timothy Gaede	1143	Julia	2024-05-27 01:06:45

#	User	Length	Language	Date
1	Sergey Jakobsen	512	Kotlin	2021-07-20 20:46:12
2	Mohsen Dehbashi	572	Kotlin	2019-07-06 11:40:14
3	Adrian Wireklint	587	Kotlin	2022-02-13 11:46:49
4	Adam Rankin	670	Kotlin	2023-08-31 03:15:27
5	Hidden user	1055	Kotlin	2020-05-08 08:51:27
6	Ryan Servera	1402	Kotlin	2020-02-16 22:22:04

#	User	Length	Language	Date
1	Matthew Lutze	818	OCaml	2020-07-05 04:27:03

#	User	Length	Language	Date
1	Susanne Ragnemalm	777	PHP	2018-03-24 12:54:37
2	Ingemar Ragnemalm	971	PHP	2018-04-07 10:59:23

#	User	Length	Language	Date
1	Thomas Feld	178	Python 2	2023-05-04 10:09:24
2	Jesper Öqvist	209	Python 2	2018-11-10 03:05:13
3	Andreas Björklund	215	Python 2	2019-05-25 16:37:36
4	Guan Yang Ze	227	Python 2	2019-11-30 19:28:27
5	Klas af Geijerstam	241	Python 2	2018-11-10 19:56:16
6	Sigurður Jens Albertsson	250	Python 2	2018-02-18 15:26:15
7	Joakim Borregaard	261	Python 2	2019-11-17 19:49:25
8	Nicole Hedblom	284	Python 2	2018-02-18 21:20:36
9	Björn Martinsson	297	Python 2	2020-08-27 17:57:15
10	Yanmarshus Bachtiar	334	Python 2	2020-09-02 14:54:53

#	User	Length	Language	Date
1	Guk Yi Siong	131	Python 3	2024-01-27 17:36:38
2	Benjamin Z White	132	Python 3	2023-05-07 10:23:06
3	Ahmed Chamseddine	138	Python 3	2024-09-24 21:00:37
4	David Qiao	149	Python 3	2026-01-20 23:19:23
5	Will Corcoran	152	Python 3	2025-01-15 18:39:22
6	Logan Detrick	157	Python 3	2025-01-14 22:38:45
7	Keshav Dharshan	169	Python 3	2025-03-31 19:44:55
8	Harry Zhang	172	Python 3	2023-04-27 23:56:15
9	Varun Asuri	173	Python 3	2023-01-20 01:53:32
10	Donald Li	176	Python 3	2024-10-08 16:15:35

#	User	Length	Language	Date
1	Thomas Feld	87	Ruby	2023-05-04 10:27:10
2	Andreas Severin Hauch Trøstrup	125	Ruby	2024-09-11 14:34:17
3	Frederik Petersen	227	Ruby	2024-09-20 17:49:35
4	Hidden user	271	Ruby	2019-10-04 19:28:34
5	Josenildo Silva	297	Ruby	2018-01-09 23:39:49
6	Jonathan Naumanen	478	Ruby	2024-02-11 15:50:37
7	Jan Schill	758	Ruby	2019-10-28 20:33:09

#	User	Length	Language	Date
1	David Rasch	709	Rust	2023-08-04 17:10:18
2	Mathias Magnusson	731	Rust	2019-02-04 13:42:49
3	Bas Dirks	877	Rust	2022-02-28 17:35:09
4	Artur Khuziakhmetov	888	Rust	2022-07-23 10:46:04
5	Johan Flensmark	1044	Rust	2022-09-10 11:24:12
6	Albert Rise Nielsen	1070	Rust	2024-09-20 18:12:31
7	Magnus Jacobsen	1214	Rust	2019-08-30 18:05:37
8	Sindbad Walter	1358	Rust	2023-10-19 17:03:11
9	Mckinley Xie	1461	Rust	2025-03-28 21:03:39
10	Akemi Izuko	1551	Rust	2022-09-23 22:11:04

#	User	Length	Language	Date
1	Arfat Hossain	781	TypeScript	2025-10-29 23:37:50

Solution running time distribution