Problem A
Toilet Seat — Problem Statistics

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Submissions	8574
Accepted submissions	3514
Submission ratio	40.98%
Authors	3536
Full solves [?]	3109
Full solve Ratio	87.92%

#	User	Runtime	Language	Date
1	Johan Grahn	0.01 s	C#	2015-04-28 01:03:22
2	Mạnh Hoàn	0.01 s	C#	2016-06-24 07:58:51
3	Faisal Rahman	0.01 s	C#	2017-11-28 02:56:07
4	Sampath Vuyyuru	0.02 s	C#	2014-10-03 06:13:05
5	masosz	0.02 s	C#	2015-01-24 12:06:59
6	Siddartha Peteti	0.02 s	C#	2015-04-12 09:59:27
7	krachera	0.02 s	C#	2015-04-28 17:40:59
8	Charles Bublies	0.02 s	C#	2015-05-03 23:49:13
9	Ronnie Sunde	0.02 s	C#	2015-06-30 13:50:28
10	Christopher Daly	0.02 s	C#	2015-07-15 21:44:18

#	User	Runtime	Language	Date
1	Timothy Bilik	0.00 s	Common Lisp	2022-09-17 20:10:32

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.03 s	F#	2023-01-14 15:27:36

#	User	Runtime	Language	Date
1	Nathan Lee	0.00 s	Go	2025-11-19 22:33:49
2	Aloysius Lee	0.02 s	Go	2020-05-07 19:00:52
3	Krzysztof Gibuła	0.07 s	Go	2019-01-20 14:04:05
4	Markus Takalo	0.07 s	Go	2019-04-27 10:50:52
5	Scott Dauer	0.07 s	Go	2020-09-11 21:06:46
6	Norbert Voelker	0.07 s	Go	2021-07-05 01:12:59
7	Việt Hà Nguyễn	0.08 s	Go	2016-06-19 04:28:28
8	Hidden user	0.08 s	Go	2016-09-16 13:40:41
9	Hidden user	0.08 s	Go	2016-12-05 10:13:40
10	Anthony Alves	0.08 s	Go	2017-01-22 04:40:38

#	User	Runtime	Language	Date
1	Stephen Atwood	0.04 s	Java	2025-07-16 21:41:34
2	Hidden user	0.05 s	Java	2014-02-17 11:30:52
3	Mattias Scherer	0.05 s	Java	2014-12-30 14:49:57
4	Jimmy Mårdell	0.05 s	Java	2015-01-03 23:52:34
5	Shobhit Kumar	0.05 s	Java	2015-04-02 18:51:49
6	Per Odlo	0.05 s	Java	2015-04-18 12:41:52
7	Sanira Chathuranga	0.05 s	Java	2015-05-19 14:54:28
8	Mostafa Hany Gomaa	0.05 s	Java	2015-05-22 00:08:36
9	Johan Lindkvist	0.05 s	Java	2015-06-06 15:27:11
10	Miles Stevenson	0.05 s	Java	2015-06-27 06:14:47

#	User	Runtime	Language	Date
1	Sander Hellesø	0.05 s	JavaScript (Node.js)	2019-05-04 06:58:07
2	Hans Bjerndell	0.05 s	JavaScript (Node.js)	2019-06-12 23:14:22
3	Gert Lenaerts	0.42 s	JavaScript (Node.js)	2020-05-07 19:08:18
4	Hidden user	0.42 s	JavaScript (Node.js)	2020-12-30 12:14:31
5	Bart Louwers	0.42 s	JavaScript (Node.js)	2022-02-06 21:34:31
6	Niamh Limerick	0.42 s	JavaScript (Node.js)	2022-04-22 19:08:53

#	User	Runtime	Language	Date
1	Markus N	0.01 s	JavaScript (SpiderMonkey)	2015-11-11 00:16:27
2	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2015-12-27 15:57:12
3	Hidden user	0.01 s	JavaScript (SpiderMonkey)	2016-01-08 18:19:44
4	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-02-08 15:44:23
5	Ryan Huang	0.01 s	JavaScript (SpiderMonkey)	2016-02-24 07:05:41
6	Daniel Johansson	0.01 s	JavaScript (SpiderMonkey)	2016-03-02 20:06:46
7	Bikash Subba	0.01 s	JavaScript (SpiderMonkey)	2016-03-25 16:51:53
8	Miguel Ehrstrand	0.01 s	JavaScript (SpiderMonkey)	2016-10-01 23:43:00
9	Cole Rauh	0.01 s	JavaScript (SpiderMonkey)	2016-10-07 20:13:41
10	Tom	0.01 s	JavaScript (SpiderMonkey)	2016-10-13 21:11:17

#	User	Runtime	Language	Date
1	Timothy Gaede	0.56 s	Julia	2024-05-21 08:40:54

#	User	Runtime	Language	Date
1	Johnny Baloney	0.11 s	Kotlin	2021-12-03 21:14:48
2	Dmitry Shostak	0.17 s	Kotlin	2018-08-22 18:53:10
3	Matt Iverson	0.18 s	Kotlin	2018-11-03 02:46:11
4	Neil Harmon	0.18 s	Kotlin	2019-07-29 09:29:13
5	Sergey Jakobsen	0.18 s	Kotlin	2021-03-13 12:19:38
6	Adam Rankin	0.18 s	Kotlin	2023-08-26 00:12:40
7	Ravisai Tiruvuri	0.18 s	Kotlin	2024-03-22 07:16:46
8	Mohsen Dehbashi	0.20 s	Kotlin	2022-02-04 13:07:41
9	Jacob Huebner	0.22 s	Kotlin	2020-04-13 05:58:58
10	Chris Johnson	0.22 s	Kotlin	2024-10-11 22:32:27

#	User	Runtime	Language	Date
1	Nguyen Hoang Trung	0.00 s	Pascal	2017-06-17 09:59:46
2	Ingemar Ragnemalm	0.00 s	Pascal	2017-08-17 14:47:47

#	User	Runtime	Language	Date
1	Denis BAURAIN	0.00 s	Perl	2026-02-04 21:38:21

#	User	Runtime	Language	Date
1	Martin Dibakar Björling	0.01 s	PHP	2015-11-24 22:15:49
2	Silvena Lam	0.01 s	PHP	2016-02-11 15:27:46
3	Andreas Rost	0.01 s	PHP	2016-03-09 13:37:06
4	Morten Mehus	0.01 s	PHP	2017-09-13 16:42:24
5	Susanne Ragnemalm	0.01 s	PHP	2018-04-24 02:20:11
6	Milton Blaesild	0.01 s	PHP	2019-03-14 14:51:57

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.18 s	Prolog	2018-12-02 11:14:42

#	User	Runtime	Language	Date
1	Alex Meade	0.02 s	Python 2	2013-10-11 23:02:44
2	Jacob Wejendorp	0.02 s	Python 2	2014-12-27 01:29:02
3	Johan Wind	0.02 s	Python 2	2015-09-17 12:28:06
4	Paweł Kordowski	0.02 s	Python 2	2015-11-29 11:40:44
5	Alvaro Silvino	0.02 s	Python 2	2016-05-09 15:37:28
6	Daniel Strizhevsky	0.02 s	Python 2	2017-06-09 08:06:24
7	Godmar Back	0.03 s	Python 2	2013-10-12 18:59:44
8	Egill Sveinbjörnsson	0.03 s	Python 2	2014-12-01 12:39:23
9	Ingibergur Sindri Stefnisson	0.03 s	Python 2	2014-12-02 08:19:26
10	Paulo Bu	0.03 s	Python 2	2015-02-05 21:47:05

#	User	Runtime	Language	Date
1	Andri Már Sigurðsson	0.02 s	Python 3	2014-12-01 12:31:55
2	Georg Styrmir Rúnarsson	0.02 s	Python 3	2014-12-01 18:49:55
3	Davíð Guðni Halldórsson	0.02 s	Python 3	2014-12-01 18:58:58
4	Martin Stensgård	0.02 s	Python 3	2015-03-25 00:09:45
5	Sondre Tharaldsen	0.02 s	Python 3	2015-04-18 13:18:10
6	James Elías Sigurðarson	0.02 s	Python 3	2015-05-31 22:42:07
7	Johannes Agestam	0.02 s	Python 3	2015-06-15 16:32:55
8	John William O'Rourke	0.02 s	Python 3	2015-07-03 07:19:01
9	Fredrik Carlsen	0.02 s	Python 3	2015-07-24 22:51:30
10	Baldur Tryggvason	0.02 s	Python 3	2015-08-06 01:59:45

#	User	Runtime	Language	Date
1	Casper Christensen	0.03 s	Ruby	2016-01-25 16:45:54
2	Karl Litterfeldt	0.03 s	Ruby	2016-03-02 19:15:54
3	Erik Rydbert	0.03 s	Ruby	2016-07-14 05:44:49
4	Sebastian Craig	0.03 s	Ruby	2016-10-12 22:21:16
5	Kevin Suwala	0.03 s	Ruby	2017-01-13 04:40:28
6	Matthew Clemons	0.03 s	Ruby	2017-05-18 19:22:00
7	Zohar Malamant	0.03 s	Ruby	2017-09-13 18:11:29
8	Hidden user	0.05 s	Ruby	2018-10-23 20:52:53
9	Rosa Gutierrez	0.05 s	Ruby	2022-05-01 20:40:08
10	Thomas Feld	0.06 s	Ruby	2023-03-30 14:39:24

#	User	Length	Language	Date
1	Thibault Raffaillac	311	C	2016-11-14 18:49:46
2	Sura Hasith	448	C	2017-04-22 15:36:46
3	Duong Luc	480	C	2016-09-10 17:24:47
4	Anton Haglund	493	C	2016-11-21 20:42:01
5	Oskar	518	C	2019-08-28 14:21:16
6	Raymond Yang	528	C	2021-08-29 02:24:37
7	Hidden user	537	C	2023-04-20 14:38:34
8	Diaa Jad	557	C	2015-04-18 13:22:12
9	Victor Carrillo	564	C	2018-02-24 08:02:59
10	Hồng Trần	584	C	2016-06-30 07:41:41

#	User	Length	Language	Date
1	李陆屿	619	C#	2019-05-15 15:15:38
2	Göran Andersson	646	C#	2022-05-21 01:02:52
3	Doug Goodman	827	C#	2018-06-29 23:17:11
4	Liam Percy	895	C#	2018-09-27 01:14:54
5	Ahmad Barhamje	920	C#	2022-12-03 13:38:16
6	Thomas Norris	936	C#	2019-06-25 05:03:01
7	Tai-Yuan Kuo	941	C#	2020-03-03 13:38:25
8	Duy Khánh	942	C#	2016-06-15 10:18:22
9	Nguyễn Việt Khánh	982	C#	2016-06-25 19:27:41
10	Brian Scott	1017	C#	2018-09-21 21:37:30

#	User	Length	Language	Date
1	Brandon Zhang	326	C++	2022-07-02 00:00:32
2	Michele Ghilardi	342	C++	2021-11-15 18:05:48
3	Antonio Molina Lovett	353	C++	2016-08-07 11:10:57
4	Yat Tin Lau	366	C++	2015-05-06 03:50:12
5	Herman Karlsson	373	C++	2015-06-18 12:08:29
6	Gabriel Gomez	379	C++	2025-04-11 22:48:46
7	VT Huong	380	C++	2016-06-18 13:59:06
8	Ve Pham	380	C++	2016-06-19 07:00:15
9	Phóng Nguyễn Huy	380	C++	2016-09-09 02:08:38
10	Phạm Minh Tuấn	380	C++	2016-09-11 05:32:38

#	User	Length	Language	Date
1	Timothy Bilik	589	Common Lisp	2022-09-17 20:10:32

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	1071	F#	2023-01-14 15:38:36

#	User	Length	Language	Date
1	Ainun Nazieb	515	Go	2020-09-24 20:21:33
2	Norbert Voelker	560	Go	2021-07-05 01:12:59
3	Việt Hà Nguyễn	664	Go	2016-06-19 04:28:28
4	Nathan Lee	690	Go	2025-11-19 22:33:49
5	Krzysztof Gibuła	705	Go	2019-01-20 14:04:05
6	Aloysius Lee	739	Go	2020-05-07 19:00:52
7	Ian Howell	767	Go	2017-01-26 04:05:17
8	Hidden user	778	Go	2016-12-05 10:13:40
9	Anthony Alves	884	Go	2017-01-22 04:40:38
10	Scott Dauer	888	Go	2020-09-11 21:06:46

#	User	Length	Language	Date
1	Chen Xu	363	Haskell	2019-08-25 00:21:06
2	Birk Tjelmeland	375	Haskell	2017-12-26 15:35:22
3	Anthony Clark	460	Haskell	2017-04-06 15:39:29
4	Jan Hlavacek	467	Haskell	2017-01-03 18:02:38
5	Li Jun	515	Haskell	2023-06-27 19:38:55
6	Steinar Simonnes	564	Haskell	2024-05-27 11:05:24
7	Imre Kerr	605	Haskell	2015-04-18 14:27:19
8	Olle Eriksson	675	Haskell	2018-06-19 20:30:51
9	Matthew Gvasalia	788	Haskell	2023-08-04 18:06:42
10	Jan Hrček	840	Haskell	2021-12-18 15:50:40

#	User	Length	Language	Date
1	Emilie Hyslop	560	Java	2020-12-16 00:05:16
2	Kurtis Van Gent	561	Java	2016-02-23 16:56:56
3	Andrew Eveld	596	Java	2020-01-30 03:22:36
4	Natalie Axelsson	603	Java	2017-06-14 18:18:30
5	Stephen Royal	616	Java	2015-08-18 17:07:00
6	Mikael Hanssen	628	Java	2017-09-13 17:16:50
7	Mouhssine Assaoud	633	Java	2017-01-05 15:14:40
8	Ulrich Johan Isachsen	636	Java	2015-04-18 12:32:19
9	Frank Ruskey	637	Java	2017-01-04 01:11:24
10	Gustavo Aguiar	665	Java	2017-04-10 21:23:50

#	User	Length	Language	Date
1	Hans Bjerndell	892	JavaScript (Node.js)	2019-06-12 23:14:22
2	Gert Lenaerts	979	JavaScript (Node.js)	2020-05-07 19:08:18
3	Bart Louwers	1224	JavaScript (Node.js)	2022-02-06 21:34:31
4	Niamh Limerick	1290	JavaScript (Node.js)	2022-04-22 19:08:53
5	Sander Hellesø	1486	JavaScript (Node.js)	2019-05-04 06:58:07
6	Hidden user	1815	JavaScript (Node.js)	2020-12-30 12:14:31

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	193	JavaScript (SpiderMonkey)	2016-02-08 16:35:11
2	Christian Pilegaard Cederquist	529	JavaScript (SpiderMonkey)	2023-02-05 10:16:29
3	Markus N	556	JavaScript (SpiderMonkey)	2015-11-11 00:49:25
4	David Trång	575	JavaScript (SpiderMonkey)	2017-11-26 22:22:15
5	Miguel Ehrstrand	576	JavaScript (SpiderMonkey)	2016-10-01 23:43:00
6	Ryan Huang	579	JavaScript (SpiderMonkey)	2016-02-24 07:05:41
7	Paul Leung	590	JavaScript (SpiderMonkey)	2017-03-31 12:51:41
8	Cole Rauh	603	JavaScript (SpiderMonkey)	2016-10-07 20:13:41
9	Omar Saad	623	JavaScript (SpiderMonkey)	2017-09-13 19:00:35
10	Tom	641	JavaScript (SpiderMonkey)	2016-10-13 21:11:17

#	User	Length	Language	Date
1	Timothy Gaede	1132	Julia	2024-05-21 08:40:54

#	User	Length	Language	Date
1	Mohsen Dehbashi	390	Kotlin	2022-02-04 13:07:41
2	Dmitry Shostak	556	Kotlin	2018-08-22 18:53:10
3	Matt Iverson	617	Kotlin	2018-11-03 02:46:11
4	Sergey Jakobsen	657	Kotlin	2021-03-13 12:21:01
5	Adam Rankin	682	Kotlin	2023-08-26 00:12:40
6	Chris Johnson	742	Kotlin	2024-10-11 22:32:27
7	Jacob Huebner	796	Kotlin	2020-04-13 05:58:58
8	Neil Harmon	1239	Kotlin	2019-07-29 09:29:13
9	Johnny Baloney	1641	Kotlin	2021-12-03 21:20:09
10	Ravisai Tiruvuri	5418	Kotlin	2024-03-22 07:16:46

#	User	Length	Language	Date
1	Nguyen Hoang Trung	1038	Pascal	2017-06-17 09:59:46
2	Ingemar Ragnemalm	1079	Pascal	2017-08-17 14:47:47

#	User	Length	Language	Date
1	Denis BAURAIN	162	Perl	2026-02-04 21:56:13

#	User	Length	Language	Date
1	Andreas Rost	651	PHP	2016-03-09 13:37:06
2	Martin Dibakar Björling	891	PHP	2015-11-24 22:15:49
3	Susanne Ragnemalm	1047	PHP	2018-04-24 02:20:11
4	Silvena Lam	1128	PHP	2016-02-11 15:27:46
5	Milton Blaesild	1144	PHP	2019-03-14 14:51:57
6	Morten Mehus	1231	PHP	2017-09-13 16:42:24

#	User	Length	Language	Date
1	Andriy Zyevakov	921	Prolog	2018-12-02 11:14:42

#	User	Length	Language	Date
1	Johan Wind	150	Python 2	2015-09-17 12:28:06
2	Thomas Feld	189	Python 2	2019-08-19 16:30:59
3	Jacob Wejendorp	208	Python 2	2014-12-27 01:29:02
4	Andreas Björklund	209	Python 2	2019-05-19 09:04:07
5	Paweł Kordowski	248	Python 2	2015-11-29 11:40:44
6	Jonas Kylling	265	Python 2	2015-03-22 17:00:30
7	Lars Åström	269	Python 2	2018-10-11 16:02:17
8	Haggai Liu	283	Python 2	2017-01-29 23:54:38
9	Jesper Öqvist	286	Python 2	2018-10-27 18:33:53
10	Yash Chandarana	288	Python 2	2016-05-06 11:37:05

#	User	Length	Language	Date
1	Dries Wedda	109	Python 3	2023-05-08 18:53:55
2	Martin Nester	146	Python 3	2024-10-13 17:30:37
3	Tai Tze Kin	151	Python 3	2024-05-08 08:41:10
4	Hrant Hovhannisyan	177	Python 3	2025-07-01 06:55:41
5	David Aldenbro	181	Python 3	2025-10-15 16:46:56
6	Hung Nguyen	216	Python 3	2018-11-03 04:22:04
7	Prateek Bhakta	221	Python 3	2022-09-09 00:52:06
8	Alexei Fedotov	226	Python 3	2019-02-02 11:21:45
9	Łukasz Łukaszew	229	Python 3	2022-07-25 08:21:53
10	Thomas Draper	231	Python 3	2022-09-02 04:14:40

#	User	Length	Language	Date
1	Thomas Feld	103	Ruby	2023-03-30 14:40:20
2	Russell Ng	103	Ruby	2025-06-07 21:19:23
3	Hidden user	278	Ruby	2018-10-23 20:52:53
4	Zohar Malamant	352	Ruby	2017-09-13 18:11:29
5	Casper Christensen	358	Ruby	2016-01-25 16:45:54
6	Kevin Suwala	415	Ruby	2017-01-13 04:40:28
7	Rosa Gutierrez	669	Ruby	2022-05-01 20:40:08
8	Erik Rydbert	694	Ruby	2016-07-14 05:44:49
9	Matthew Clemons	757	Ruby	2017-05-18 19:22:00
10	Karl Litterfeldt	1111	Ruby	2016-03-02 19:15:54

#	User	Length	Language	Date
1	Vincent Lagerros	717	Rust	2025-06-02 23:41:14
2	Bas Dirks	953	Rust	2022-01-08 21:43:26
3	Vasiliy Kevroletin	1208	Rust	2025-09-10 15:15:31
4	Albert Rise Nielsen	1356	Rust	2020-11-15 17:03:24
5	jaswanth	1425	Rust	2024-03-18 07:20:45
6	藤原潮人	1447	Rust	2023-04-21 17:56:29
7	Gabriella Gloria	1740	Rust	2025-05-02 13:47:42
8	Ming Kang	2027	Rust	2025-06-06 06:10:58
9	Joe Blower	2086	Rust	2025-08-25 18:10:48
10	Chun Mun Soon	3701	Rust	2021-07-25 09:02:02

Solution running time distribution