Problem A
Room Painting — Problem Statistics

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Submissions	14594
Accepted submissions	3999
Submission ratio	27.40%
Authors	3442
Full solves [?]	2882
Full solve Ratio	83.73%

#	User	Runtime	Language	Date
1	Arvid Jonasson	0.07 s	APL	2025-06-14 13:35:58

#	User	Runtime	Language	Date
1	Arvid Jonasson	0.01 s	C	2025-06-19 09:51:17
2	Shiyi Du	0.02 s	C	2018-10-13 09:34:50
3	Ivan Petrov	0.02 s	C	2020-01-09 08:23:50
4	Bergur Snorrason	0.02 s	C	2020-10-29 07:20:52
5	Daniel	0.02 s	C	2021-11-18 16:42:19
6	Sang Won	0.02 s	C	2023-08-11 15:38:48
7	Tom	0.02 s	C	2024-11-09 19:58:49
8	Mirel Cosulschi	0.02 s	C	2025-04-24 13:10:51
9	Sambit Palit	0.03 s	C	2020-12-06 19:42:18
10	Francisca Salinas Durbahn (Alumno)	0.03 s	C	2025-05-30 03:15:28

#	User	Runtime	Language	Date
1	traxex	0.07 s	C#	2024-04-30 10:24:06
2	Andrei Cosovan	0.08 s	C#	2026-02-08 15:12:54
3	Linda Hansson	0.09 s	C#	2015-10-13 13:11:26
4	Nathan Andrews	0.10 s	C#	2024-10-18 21:28:54
5	Shiyi Du	0.11 s	C#	2018-10-13 08:49:13
6	Jayant Notani	0.12 s	C#	2020-01-24 23:17:33
7	Hidden user	0.13 s	C#	2020-07-21 08:35:20
8	Wesley Matthews	0.13 s	C#	2020-11-23 20:06:15
9	Justin Kennedy	0.14 s	C#	2020-11-23 21:51:28
10	Dan Wolff	0.15 s	C#	2020-02-08 12:48:59

#	User	Runtime	Language	Date
1	Cian Ruane	0.01 s	C++	2017-08-29 12:26:16
2	Eoin Davey	0.01 s	C++	2017-08-29 13:59:45
3	Sergio Vieri	0.01 s	C++	2018-03-25 03:51:29
4	Hidden user	0.01 s	C++	2019-02-18 19:48:06
5	Auburn Ford	0.01 s	C++	2019-03-25 06:47:10
6	Scott MacIntosh	0.01 s	C++	2020-01-31 20:16:20
7	Agis Daniels	0.01 s	C++	2020-03-04 14:30:26
8	Hidden user	0.01 s	C++	2021-07-04 22:50:46
9	Geralt of Rivia	0.01 s	C++	2022-08-16 00:54:08
10	TCFSH69	0.01 s	C++	2024-02-06 04:50:11

#	User	Runtime	Language	Date
1	Hidden user	0.08 s	Common Lisp	2019-07-11 18:42:36

#	User	Runtime	Language	Date
1	Kasper Berthelsen	0.56 s	F#	2022-03-11 17:51:19

#	User	Runtime	Language	Date
1	Kiki Ibrahim	0.02 s	Go	2024-08-10 11:45:02
2	Dylan	0.07 s	Go	2025-09-16 21:55:55
3	Norbert Voelker	0.10 s	Go	2022-02-20 12:08:49
4	Iker Lissarrague	0.10 s	Go	2022-03-15 22:04:44

#	User	Runtime	Language	Date
1	BlackcapCoder	0.06 s	Haskell	2019-05-12 10:40:29
2	Steinar Simonnes	0.08 s	Haskell	2024-06-09 11:50:42
3	Dario Vidas	0.24 s	Haskell	2016-02-15 23:23:23
4	Brent Yorgey	0.26 s	Haskell	2018-08-30 02:26:45
5	Stian	0.40 s	Haskell	2020-01-29 14:33:10
6	Joshua Coward	0.45 s	Haskell	2022-02-06 23:31:13
7	Henrieta Micheľová	0.49 s	Haskell	2020-01-28 11:49:23
8	Mikail Khan	0.69 s	Haskell	2022-02-16 18:08:27
9	Blake Hyde	0.91 s	Haskell	2019-12-03 15:41:05

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.09 s	Java	2024-04-07 17:01:42
2	Bjørn Dons	0.10 s	Java	2018-11-10 19:44:07
3	Mehdi Maick	0.11 s	Java	2018-08-27 18:41:21
4	Dominic Danborn	0.11 s	Java	2022-02-12 16:52:55
5	Siddharth Adusumelli	0.11 s	Java	2022-10-05 18:50:43
6	Kol Greenbaum	0.11 s	Java	2023-02-03 00:37:25
7	Hidden user	0.11 s	Java	2023-10-08 11:50:08
8	Aditya Gupta	0.12 s	Java	2022-02-18 04:38:45
9	Asmus Tørsleff	0.12 s	Java	2022-03-11 16:17:42
10	Jimmy Dinh	0.12 s	Java	2023-02-01 15:30:45

#	User	Runtime	Language	Date
1	Nicklas Østerberg	0.55 s	JavaScript (Node.js)	2021-11-29 10:40:12
2	Stephanie Keck	0.61 s	JavaScript (Node.js)	2020-01-30 21:43:36
3	Max Zheng	0.64 s	JavaScript (Node.js)	2021-10-23 19:18:10

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.09 s	JavaScript (SpiderMonkey)	2023-05-30 19:48:46
2	Christopher Walther	0.11 s	JavaScript (SpiderMonkey)	2021-05-01 00:20:18
3	Peter Kedemo	0.23 s	JavaScript (SpiderMonkey)	2017-06-24 17:07:42
4	Bjørn Chr. Soltvedt	0.31 s	JavaScript (SpiderMonkey)	2018-12-17 22:04:16

#	User	Runtime	Language	Date
1	Hidden user	0.50 s	Julia	2025-05-15 16:53:18
2	Timothy Gaede	0.60 s	Julia	2024-05-30 06:55:45

#	User	Runtime	Language	Date
1	Nico Metger	0.36 s	Kotlin	2021-11-17 21:54:50
2	Phường Lên	0.38 s	Kotlin	2020-06-22 09:48:54
3	Chris Johnson	0.47 s	Kotlin	2023-11-28 00:27:15
4	Ditlef Alexander Diseth	0.48 s	Kotlin	2020-01-28 12:26:16
5	Adam Rankin	0.48 s	Kotlin	2026-01-13 19:26:52

#	User	Runtime	Language	Date
1	Christian B	0.13 s	Lua	2025-09-05 01:04:15
2	Caleb Austin	0.29 s	Lua	2024-10-18 21:09:49

#	User	Runtime	Language	Date
1	Christofer Ohlsson	0.06 s	Python 2	2015-05-26 11:33:12
2	Luca Della Vedova	0.06 s	Python 2	2016-02-15 21:28:48
3	Ciara Godwin	0.06 s	Python 2	2017-08-29 16:48:43
4	Justin Su	0.06 s	Python 2	2018-10-01 23:47:05
5	Hermon Mulat	0.06 s	Python 2	2018-11-15 16:51:45
6	Thomas Feld	0.07 s	Python 2	2020-06-29 13:43:22
7	Johan Lyts	0.07 s	Python 2	2022-12-28 20:38:00
8	Oskar Haarklou Veileborg	0.09 s	Python 2	2018-11-11 14:44:47
9	Lars Åström	0.09 s	Python 2	2019-05-15 21:47:27
10	Andreas Björklund	0.10 s	Python 2	2020-11-25 20:35:10

#	User	Runtime	Language	Date
1	Anvit Sinha	0.07 s	Python 3	2024-09-29 01:41:54
2	Muhammad Sohail	0.07 s	Python 3	2024-10-03 22:22:39
3	Sannidhi Agarwal	0.07 s	Python 3	2026-02-11 22:18:51
4	Josh Taylor	0.08 s	Python 3	2022-07-07 02:02:44
5	Camilo Perez Osorio (Alumno)	0.08 s	Python 3	2024-09-26 03:48:55
6	Simon Lavoie	0.08 s	Python 3	2024-10-03 22:37:46
7	Alan Hu	0.08 s	Python 3	2024-10-22 23:41:50
8	Petr	0.08 s	Python 3	2024-12-30 14:28:42
9	satikit tupbumrung	0.08 s	Python 3	2025-02-03 03:27:52
10	Nguyên Khôi Đỗ	0.08 s	Python 3	2025-02-09 03:18:24

#	User	Runtime	Language	Date
1	Thomas Feld	0.20 s	Ruby	2023-03-29 10:51:13

#	User	Runtime	Language	Date
1	Alice Ryhl	0.01 s	Rust	2022-03-11 15:19:41
2	Vincent Lagerros	0.01 s	Rust	2024-08-01 01:21:51
3	Egor Kulikov	0.01 s	Rust	2025-01-10 17:43:06
4	Bas Dirks	0.01 s	Rust	2025-02-02 09:39:18
5	Joe Blower	0.01 s	Rust	2025-08-28 15:52:19
6	Artur Khuziakhmetov	0.01 s	Rust	2025-11-17 15:38:39
7	David Rasch	0.02 s	Rust	2020-11-19 15:13:52
8	Pahlevi Fikri Auliya	0.02 s	Rust	2021-03-15 22:57:09
9	Polly Clémentine Nielsen Boutet-Livoff	0.02 s	Rust	2022-03-11 16:23:37
10	Akemi Izuko	0.02 s	Rust	2022-09-07 02:09:13

#	User	Runtime	Language	Date
1	Danial Haseeb	0.08 s	Swift	2023-09-29 18:04:46

#	User	Length	Language	Date
1	Arvid Jonasson	93	APL	2025-06-19 00:08:04

#	User	Length	Language	Date
1	Efren Jewel Dela Cruz	645	C	2025-10-18 10:22:13
2	Mirel Cosulschi	690	C	2025-04-24 13:10:51
3	Ivan Petrov	796	C	2020-01-09 08:23:50
4	Francisca Salinas Durbahn (Alumno)	1000	C	2025-05-30 03:15:28
5	Daniel	1044	C	2021-11-18 16:42:19
6	Jeviczki Jane	1176	C	2025-11-21 23:57:29
7	Jonathan Davidsson	1326	C	2026-01-30 15:30:54
8	Sang Won	1379	C	2023-08-11 15:38:48
9	Filiph Salomonsson	1381	C	2025-06-18 12:34:36
10	Martin Berglund	1480	C	2025-06-13 22:06:04

#	User	Length	Language	Date
1	traxex	578	C#	2024-04-30 10:24:06
2	Hidden user	690	C#	2026-02-03 07:47:00
3	Robin Rausch	715	C#	2026-02-03 07:55:52
4	Shiyi Du	818	C#	2018-10-13 03:12:43
5	Nathan Andrews	819	C#	2024-10-18 21:28:54
6	Dan Church	917	C#	2022-06-24 16:31:48
7	Lukas P.	1014	C#	2026-03-05 18:22:43
8	Rohan Johnson	1126	C#	2022-11-04 13:40:04
9	Hidden user	1189	C#	2020-07-21 08:35:20
10	Daniel Juhl	1226	C#	2022-03-11 18:25:26

#	User	Length	Language	Date
1	Angela Qian	178	C++	2025-02-13 00:16:45
2	Yu-Chen Chan	191	C++	2024-02-06 05:37:27
3	Mugeon Kim	277	C++	2024-04-08 01:31:23
4	Johan Wind	298	C++	2015-09-25 11:54:03
5	Herman Karlsson	301	C++	2016-01-01 23:53:38
6	Flor Elisa Chacón Ochoa	304	C++	2018-06-15 04:31:10
7	Alexander Skidanov	312	C++	2024-10-16 18:49:59
8	__	317	C++	2025-09-07 03:27:47
9	Ryan Chew	318	C++	2019-02-07 10:11:20
10	James Jaya	320	C++	2015-09-15 14:51:14

#	User	Length	Language	Date
1	Hidden user	772	Common Lisp	2019-07-11 18:25:08

#	User	Length	Language	Date
1	Kasper Berthelsen	2118	F#	2022-03-11 17:51:19

#	User	Length	Language	Date
1	Norbert Voelker	602	Go	2022-02-20 12:08:49
2	Iker Lissarrague	943	Go	2022-03-15 22:04:44
3	Dylan	1210	Go	2025-09-16 21:55:55
4	Kiki Ibrahim	1652	Go	2024-08-10 11:45:02

#	User	Length	Language	Date
1	BlackcapCoder	346	Haskell	2019-05-12 10:45:52
2	Mikail Khan	368	Haskell	2022-02-16 18:08:27
3	Stian	423	Haskell	2020-01-29 14:33:10
4	Henrieta Micheľová	516	Haskell	2020-01-28 11:49:23
5	Steinar Simonnes	604	Haskell	2024-06-09 11:50:42
6	Blake Hyde	628	Haskell	2019-12-03 12:51:03
7	Dario Vidas	673	Haskell	2016-02-15 20:56:07
8	Joshua Coward	737	Haskell	2022-02-06 23:31:13
9	Brent Yorgey	1464	Haskell	2018-08-30 02:26:45

#	User	Length	Language	Date
1	Hidden user	454	Java	2023-10-08 11:59:38
2	Sujay Vadlakonda	482	Java	2021-09-04 16:51:23
3	Nikoline Olander Rasmussen	555	Java	2022-03-11 16:10:34
4	Lim Zi Wei	585	Java	2019-10-14 01:22:44
5	Hoàng Minh	589	Java	2018-10-02 02:00:12
6	Zhou Long	596	Java	2022-07-27 19:32:24
7	Johnathan Rhyne	633	Java	2020-02-25 02:07:10
8	Adil Rasiyani	651	Java	2020-01-24 21:24:48
9	Hidden user	671	Java	2023-10-10 18:56:52
10	Olaoluwa Samuel Oke	671	Java	2025-05-14 18:08:02

#	User	Length	Language	Date
1	Max Zheng	840	JavaScript (Node.js)	2021-10-23 19:18:10
2	Nicklas Østerberg	896	JavaScript (Node.js)	2021-11-29 10:40:12
3	Stephanie Keck	8275	JavaScript (Node.js)	2020-01-30 21:43:36

#	User	Length	Language	Date
1	Peter Kedemo	494	JavaScript (SpiderMonkey)	2017-06-24 17:07:42
2	Bjørn Chr. Soltvedt	496	JavaScript (SpiderMonkey)	2018-12-17 22:04:16
3	Christian Pilegaard Cederquist	730	JavaScript (SpiderMonkey)	2023-05-30 19:48:46
4	Christopher Walther	1133	JavaScript (SpiderMonkey)	2021-05-01 00:20:18

#	User	Length	Language	Date
1	Hidden user	380	Julia	2025-05-15 16:53:18
2	Timothy Gaede	2091	Julia	2024-05-30 06:55:45

#	User	Length	Language	Date
1	Adam Rankin	580	Kotlin	2026-01-13 19:26:52
2	Nico Metger	1043	Kotlin	2021-11-17 21:54:50
3	Phường Lên	1223	Kotlin	2020-06-22 09:48:54
4	Chris Johnson	1580	Kotlin	2023-11-28 00:27:15
5	Ditlef Alexander Diseth	2986	Kotlin	2020-01-28 12:27:23

#	User	Length	Language	Date
1	Caleb Austin	1358	Lua	2024-10-18 21:09:49
2	Christian B	2877	Lua	2025-09-05 01:04:15

#	User	Length	Language	Date
1	Johan Lyts	232	Python 2	2022-12-27 14:15:01
2	Thomas Feld	240	Python 2	2020-06-29 13:43:22
3	Justin Su	256	Python 2	2018-10-01 23:47:05
4	Andreas Björklund	260	Python 2	2020-11-25 20:35:10
5	Lars Åström	271	Python 2	2019-05-15 21:47:27
6	Hermon Mulat	325	Python 2	2018-11-15 16:51:45
7	William Taylor-Melanson	327	Python 2	2020-01-31 20:14:23
8	Oskar Haarklou Veileborg	331	Python 2	2018-11-11 14:42:32
9	Christofer Ohlsson	352	Python 2	2015-05-26 11:33:12
10	Ciara Godwin	485	Python 2	2017-08-29 16:47:18

#	User	Length	Language	Date
1	Nguyên Khôi Đỗ	123	Python 3	2025-02-09 03:24:15
2	Michael Goldwasser	133	Python 3	2025-09-13 23:16:02
3	Benjamin Z White	142	Python 3	2023-04-12 16:26:38
4	Joey Pabalan	142	Python 3	2025-09-16 22:16:12
5	Peter Stauder	145	Python 3	2023-02-11 19:07:00
6	Tai Tze Kin	167	Python 3	2024-05-04 16:38:43
7	Jian Shi	176	Python 3	2022-10-29 03:24:03
8	Clement Oh	178	Python 3	2023-12-31 16:07:38
9	Shashank Bhatt	180	Python 3	2024-07-22 17:20:19
10	Ahmed Chamseddine	182	Python 3	2024-09-16 11:48:51

#	User	Length	Language	Date
1	Thomas Feld	72	Ruby	2023-03-29 10:51:13

#	User	Length	Language	Date
1	Artur Khuziakhmetov	520	Rust	2025-11-17 15:38:39
2	Bas Dirks	596	Rust	2025-02-02 09:39:18
3	Marcus Persson	898	Rust	2025-06-19 02:43:32
4	Eric Källman	908	Rust	2025-06-16 10:54:33
5	Hidden user	947	Rust	2024-12-26 06:47:05
6	Michael Jeppesen	1006	Rust	2026-02-27 15:50:55
7	David Rasch	1031	Rust	2020-11-19 15:13:52
8	Alice Ryhl	1044	Rust	2022-03-11 15:19:41
9	Polly Clémentine Nielsen Boutet-Livoff	1118	Rust	2022-03-11 16:23:37
10	Viktor Valastin	1332	Rust	2020-01-29 13:16:21

#	User	Length	Language	Date
1	Danial Haseeb	479	Swift	2023-09-29 18:08:09

Solution running time distribution