Problem A
Testing LEDs — Problem Statistics

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Submissions	1091
Accepted submissions	475
Submission ratio	43.54%
Authors	440
Full solves [?]	423
Full solve Ratio	96.14%

#	User	Runtime	Language	Date
1	Sebastian Banert	0.04 s	Ada	2025-07-14 17:06:00
2	Sergio Huhuhu	0.04 s	Ada	2025-10-22 17:14:47

#	User	Runtime	Language	Date
1	Danny Robinson	0.04 s	Bash	2025-07-30 10:54:34
2	Chenzhang Hu	0.17 s	Bash	2025-09-13 03:43:57
3	Radu Rau	1.32 s	Bash	2025-10-10 15:33:38

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.00 s	C	2025-05-23 18:33:07
2	Hidden user	0.00 s	C	2025-06-11 23:00:52
3	Joacim Wärn	0.00 s	C	2025-08-01 10:53:37
4	Allan Nouri	0.02 s	C	2025-05-24 09:56:19
5	Bogdan Kirienko	0.02 s	C	2025-05-31 04:13:26
6	Mikael K Eriksson	0.02 s	C	2025-06-03 10:34:39
7	Fereshta Hasanzada	0.02 s	C	2025-06-05 13:58:32
8	Børge Bjørnstadjordet	0.02 s	C	2025-08-19 14:18:17
9	Eduardo Vicente Petry	0.02 s	C	2025-08-20 21:36:15
10	Emmie Ehlin	0.02 s	C	2025-10-10 16:26:28

#	User	Runtime	Language	Date
1	Esty Crow	0.06 s	C#	2025-05-28 10:39:46
2	Anthony Ye	0.07 s	C#	2025-05-30 20:15:09
3	Erik Algesten	0.07 s	C#	2025-07-04 11:22:25
4	Erikas Montvydas	0.07 s	C#	2025-07-25 08:11:45
5	Roberts Zommerovskis	0.07 s	C#	2025-10-10 13:00:15
6	Jani Heikkinen	0.07 s	C#	2025-10-10 14:56:54
7	Anton Söderberg	0.07 s	C#	2025-10-10 15:22:12
8	Noah Järvbäck	0.07 s	C#	2025-10-10 17:03:13
9	Գոռ Բաղդասարյան	0.07 s	C#	2025-12-05 05:27:40
10	Diogo Neves	0.08 s	C#	2025-10-10 15:52:19

#	User	Runtime	Language	Date
1	Evan Michael Bailey	0.00 s	C++	2025-06-21 21:35:00
2	Joshua Andersson	0.00 s	C++	2025-07-05 17:48:48
3	Nick Wu	0.02 s	C++	2025-03-15 18:01:43
4	William Tsin	0.02 s	C++	2025-03-15 18:02:33
5	Dylan Smith	0.02 s	C++	2025-03-15 18:04:58
6	Michael Shio	0.02 s	C++	2025-03-15 18:07:50
7	Jubayer Nirjhor	0.02 s	C++	2025-03-15 18:11:52
8	Andrew Li	0.02 s	C++	2025-03-15 18:13:22
9	Benyu Wang	0.02 s	C++	2025-03-15 18:14:02
10	Ayman Gani	0.02 s	C++	2025-03-15 18:20:30

#	User	Runtime	Language	Date
1	dick move	0.05 s	Crystal	2025-10-29 04:35:56

#	User	Runtime	Language	Date
1	Theis Per Holm	0.11 s	F#	2026-02-03 06:24:53
2	Maja Clara Schewe-Jensen	0.12 s	F#	2026-02-04 15:16:59
3	Sebastian Cloos Hylander	0.24 s	F#	2026-02-04 15:14:48

#	User	Runtime	Language	Date
1	Norbert Voelker	0.01 s	Go	2025-05-24 12:55:44
2	Hidden user	0.01 s	Go	2025-10-10 16:40:26
3	Bogdan Matei	0.03 s	Go	2025-10-10 13:45:01
4	Jimmy Nejtron	0.13 s	Go	2025-07-31 19:31:28

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.01 s	Haskell	2025-05-25 18:03:48
2	Zach Tschetter	0.25 s	Haskell	2026-03-04 20:24:28
3	Brent Yorgey	0.28 s	Haskell	2025-06-13 19:42:22
4	Hidden user	0.43 s	Haskell	2025-05-31 01:09:51

#	User	Runtime	Language	Date
1	Guangyi Zhou	0.06 s	Java	2025-05-28 07:13:49
2	pothyne	0.25 s	Java	2025-12-31 21:46:22
3	Mattias Gustafsson	0.31 s	Java	2025-09-30 18:33:19
4	Sean Pettas	0.32 s	Java	2025-11-07 16:46:54
5	Markus Bao	0.43 s	Java	2025-10-13 06:04:08
6	Emil Kennet Nørgaard	0.66 s	Java	2025-11-07 16:34:19
7	Thomas Anung Basuki	0.66 s	Java	2025-12-06 13:41:01
8	Cambrien Malenko	0.68 s	Java	2025-03-15 18:16:42
9	Hidden user	0.72 s	Java	2025-11-07 17:09:36
10	Ethan Sohn	0.72 s	Java	2026-02-27 16:08:07

#	User	Runtime	Language	Date
1	Naser Ogrešević	0.14 s	JavaScript (Node.js)	2025-12-08 06:18:31
2	Danut Badea	0.16 s	JavaScript (Node.js)	2025-10-10 14:54:11
3	Bogdan Dimoiu	0.17 s	JavaScript (Node.js)	2025-10-10 15:03:30

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.07 s	JavaScript (SpiderMonkey)	2025-06-03 07:25:42
2	Jimmy Gustafsson	0.07 s	JavaScript (SpiderMonkey)	2025-06-29 23:42:05
3	Simon Titkó	0.14 s	JavaScript (SpiderMonkey)	2025-11-07 17:56:30
4	Bjørn Chr. Soltvedt	0.17 s	JavaScript (SpiderMonkey)	2025-05-23 18:45:38

#	User	Runtime	Language	Date
1	Timothy Gaede	0.50 s	Julia	2025-05-23 05:53:20

#	User	Runtime	Language	Date
1	Adam Rankin	0.50 s	Kotlin	2026-01-12 20:36:54

#	User	Runtime	Language	Date
1	Hidden user	0.09 s	Odin	2025-05-23 22:52:44

#	User	Runtime	Language	Date
1	Gijs Boosten	0.05 s	PHP	2025-10-10 17:10:51
2	Renate	0.05 s	PHP	2026-02-16 01:49:27

#	User	Runtime	Language	Date
1	Sivasankaran D	0.13 s	Python 2	2025-08-07 16:27:04

#	User	Runtime	Language	Date
1	Petr	0.05 s	Python 3	2025-05-22 23:48:03
2	Ryan Tan	0.06 s	Python 3	2025-05-24 16:13:06
3	Baiba Čevere	0.06 s	Python 3	2025-10-10 15:03:56
4	Hector Bjernersjö	0.06 s	Python 3	2025-10-10 16:32:25
5	Yanmarshus Bachtiar	0.06 s	Python 3	2026-01-22 05:38:55
6	Hidden user	0.06 s	Python 3	2026-02-15 15:35:12
7	Muhammad Maaz	0.06 s	Python 3	2026-03-06 17:47:24
8	Jared Gourley	0.07 s	Python 3	2025-03-15 18:38:50
9	Simen Sørensen	0.07 s	Python 3	2025-05-22 21:00:26
10	Rebecca Jackson	0.07 s	Python 3	2025-06-16 19:55:43

#	User	Runtime	Language	Date
1	Thomas Feld	0.14 s	Ruby	2025-06-30 09:25:23
2	Mads Larsen	0.18 s	Ruby	2025-10-10 20:11:11
3	Matzuka	0.21 s	Ruby	2025-10-26 13:43:44
4	Chenzhang Hu	0.41 s	Ruby	2025-09-22 18:11:21
5	Zilin Jiang	0.54 s	Ruby	2025-03-15 18:33:32

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.00 s	Rust	2025-05-23 14:11:10
2	Frank Endriss	0.01 s	Rust	2025-05-22 22:10:22
3	Henrik Josefsson	0.01 s	Rust	2025-07-14 13:57:58
4	Espen Johnsen Bentdal	0.01 s	Rust	2026-01-08 20:23:30
5	Mikael Fiala-Lundström	0.01 s	Rust	2026-02-15 23:56:10
6	Pankajkumar Patro	0.02 s	Rust	2025-05-23 16:39:23
7	Fredrik Eriksson	0.02 s	Rust	2025-06-25 19:55:55
8	Hidden user	0.02 s	Rust	2025-07-14 20:28:58
9	Nathaniel Risum	0.02 s	Rust	2025-10-27 15:45:10
10	Sebby	0.02 s	Rust	2025-11-07 16:20:33

#	User	Runtime	Language	Date
1	Hidden user	0.12 s	TypeScript	2025-10-10 14:17:12
2	Sebastian Rosenblad	0.13 s	TypeScript	2025-09-30 19:03:02
3	Luís Azevedo	0.45 s	TypeScript	2025-10-10 16:09:21

#	User	Length	Language	Date
1	Sebastian Banert	304	Ada	2025-07-14 17:06:00
2	Sergio Huhuhu	433	Ada	2025-10-22 17:14:47

#	User	Length	Language	Date
1	Chenzhang Hu	39	Bash	2025-09-13 03:43:57
2	Danny Robinson	45	Bash	2025-07-30 10:54:34
3	Radu Rau	311	Bash	2025-10-10 15:33:38

#	User	Length	Language	Date
1	Eduardo Vicente Petry	239	C	2025-08-20 21:36:15
2	Mikael K Eriksson	274	C	2025-06-03 10:34:39
3	Emmie Ehlin	303	C	2025-10-10 16:26:28
4	Børge Bjørnstadjordet	382	C	2025-08-19 14:18:17
5	Allan Nouri	383	C	2025-05-24 09:56:19
6	Theis Per Holm	394	C	2025-11-07 17:10:26
7	Merih Bora Poçan	450	C	2026-01-25 05:38:54
8	Bogdan Kirienko	484	C	2025-05-31 04:13:26
9	Jeviczki Jane	526	C	2025-11-22 16:52:00
10	Fereshta Hasanzada	528	C	2025-06-05 13:58:32

#	User	Length	Language	Date
1	Esty Crow	437	C#	2025-05-28 10:39:46
2	Deci Bel	441	C#	2025-07-08 12:32:10
3	Anthony Ye	559	C#	2025-05-30 20:15:09
4	Գոռ Բաղդասարյան	635	C#	2025-12-05 05:27:40
5	Umar Rasyid	639	C#	2025-05-27 05:45:41
6	Nithi Dhanasekaran	670	C#	2025-10-10 06:53:07
7	Roberts Zommerovskis	691	C#	2025-10-10 13:00:15
8	Daniel Strömberg	700	C#	2025-10-10 13:03:42
9	Erikas Montvydas	789	C#	2025-07-25 08:11:45
10	Jani Heikkinen	833	C#	2025-10-10 14:56:54

#	User	Length	Language	Date
1	Ernest Ng Zi Xuan	204	C++	2025-05-24 08:35:45
2	Buste Alin	239	C++	2025-07-08 14:38:25
3	Jacob Pfeifer	242	C++	2025-06-24 15:05:31
4	Jesús Pacheco Alonso	267	C++	2025-05-23 17:49:06
5	Howard Cheng	286	C++	2025-08-05 22:36:55
6	Kristinn Hrafn Daníelsson	287	C++	2025-07-14 14:25:18
7	Vladyslav Reznikov	289	C++	2025-06-07 17:57:23
8	Gurpreet Singh	295	C++	2025-08-06 08:40:15
9	Darcy Best	315	C++	2025-03-15 18:36:03
10	Dustin R	324	C++	2025-07-18 20:22:44

#	User	Length	Language	Date
1	dick move	126	Crystal	2025-10-29 04:35:56

#	User	Length	Language	Date
1	Maja Clara Schewe-Jensen	2191	F#	2026-02-04 15:16:59
2	Theis Per Holm	2209	F#	2026-02-04 14:53:17
3	Sebastian Cloos Hylander	2258	F#	2026-02-04 15:14:48

#	User	Length	Language	Date
1	Hidden user	206	Go	2025-10-08 19:28:22
2	Norbert Voelker	599	Go	2025-05-24 12:55:44
3	Jimmy Nejtron	628	Go	2025-07-31 19:31:28
4	Bogdan Matei	897	Go	2025-10-10 13:45:01

#	User	Length	Language	Date
1	Zach Tschetter	233	Haskell	2026-03-04 20:24:28
2	Brent Yorgey	310	Haskell	2025-06-13 19:42:22
3	Hidden user	313	Haskell	2025-05-31 01:09:51
4	Steinar Simonnes	503	Haskell	2025-05-25 18:03:48

#	User	Length	Language	Date
1	Ethan Sohn	463	Java	2026-02-27 16:08:07
2	Alex Rudzenis	477	Java	2025-07-18 11:39:35
3	Linkin Snary	500	Java	2025-11-27 22:09:36
4	Ron Offengenden	521	Java	2025-03-15 18:20:51
5	RJ Mercado	529	Java	2025-03-15 19:23:54
6	Markus Bao	532	Java	2025-10-13 06:04:08
7	Immanuel Charles	544	Java	2025-11-27 21:01:37
8	Fredrik Persson	562	Java	2025-09-30 18:41:38
9	Luke Tan	574	Java	2025-09-18 11:18:18
10	Hidden user	586	Java	2026-02-27 15:08:38

#	User	Length	Language	Date
1	Naser Ogrešević	367	JavaScript (Node.js)	2025-12-08 06:18:31
2	Bogdan Dimoiu	690	JavaScript (Node.js)	2025-10-10 15:03:30
3	Danut Badea	728	JavaScript (Node.js)	2025-10-10 14:54:11

#	User	Length	Language	Date
1	Jimmy Gustafsson	89	JavaScript (SpiderMonkey)	2025-06-29 23:42:05
2	Bjørn Chr. Soltvedt	159	JavaScript (SpiderMonkey)	2025-05-23 18:47:39
3	Christian Pilegaard Cederquist	181	JavaScript (SpiderMonkey)	2025-06-03 07:25:42
4	Simon Titkó	292	JavaScript (SpiderMonkey)	2025-11-07 17:56:30

#	User	Length	Language	Date
1	Timothy Gaede	346	Julia	2025-05-23 05:52:21

#	User	Length	Language	Date
1	Adam Rankin	345	Kotlin	2026-01-12 20:36:54

#	User	Length	Language	Date
1	Hidden user	786	Odin	2025-05-23 22:52:44

#	User	Length	Language	Date
1	Renate	246	PHP	2026-02-16 01:49:27
2	Gijs Boosten	602	PHP	2025-10-10 17:10:51

#	User	Length	Language	Date
1	Sivasankaran D	180	Python 2	2025-08-07 16:27:04

#	User	Length	Language	Date
1	Hidden user	97	Python 3	2025-12-21 17:54:57
2	Nicholas Russell Saerang	98	Python 3	2025-05-23 04:57:05
3	Farzam Abrishami	99	Python 3	2025-08-09 01:30:33
4	David Worley	103	Python 3	2025-10-29 21:38:02
5	Hidden user	108	Python 3	2025-06-02 18:16:30
6	Simon Baeckelant	109	Python 3	2025-05-25 07:28:46
7	Caeden Whitaker	109	Python 3	2025-05-31 09:10:27
8	Ahmed Chamseddine	115	Python 3	2025-05-23 15:51:00
9	Lasse Letager Hansen	117	Python 3	2025-05-29 09:49:39
10	Emil bks	119	Python 3	2025-11-07 16:54:25

#	User	Length	Language	Date
1	Thomas Feld	39	Ruby	2025-06-30 09:26:54
2	Matzuka	131	Ruby	2025-10-26 13:43:44
3	Chenzhang Hu	139	Ruby	2025-09-22 18:11:21
4	Zilin Jiang	169	Ruby	2025-03-15 18:33:32
5	Mads Larsen	236	Ruby	2025-10-10 20:11:11

#	User	Length	Language	Date
1	Emil Dichmann	379	Rust	2025-09-15 11:14:09
2	Henrik Josefsson	502	Rust	2025-07-14 13:57:58
3	Pankajkumar Patro	579	Rust	2025-05-23 16:39:23
4	Mikael Fiala-Lundström	595	Rust	2026-02-15 23:56:10
5	Nathaniel Risum	641	Rust	2025-10-27 15:45:10
6	Espen Johnsen Bentdal	669	Rust	2026-01-08 20:23:30
7	Fredrik Eriksson	733	Rust	2025-06-25 19:55:55
8	Sebby	888	Rust	2025-11-07 16:20:33
9	Frank Endriss	1922	Rust	2025-05-22 22:10:22
10	Hidden user	6091	Rust	2025-07-14 20:28:58

#	User	Length	Language	Date
1	Sebastian Rosenblad	506	TypeScript	2025-09-30 19:03:02
2	Hidden user	597	TypeScript	2025-10-10 14:17:12
3	Luís Azevedo	632	TypeScript	2025-10-10 16:09:21

Solution running time distribution