Problem A
Tri Tiling — Problem Statistics

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Submissions	3899
Accepted submissions	1554
Submission ratio	39.86%
Authors	1390
Full solves [?]	1211
Full solve Ratio	87.12%

#	User	Runtime	Language	Date
1	Stefan Nordling	0.02 s	C#	2015-11-02 18:28:28
2	Marek	0.02 s	C#	2016-10-19 18:41:09
3	Andrzej Krajniak	0.02 s	C#	2016-10-19 19:39:31
4	Omar N Mohamed Hassan	0.02 s	C#	2021-01-09 22:26:42
5	Muhammad Charaf	0.02 s	C#	2021-04-13 13:21:48
6	Priyanshu Agrawal	0.02 s	C#	2021-04-28 08:49:58
7	Robert Warnestam	0.02 s	C#	2021-05-02 18:10:11
8	Joshua	0.04 s	C#	2025-06-21 00:35:11
9	Matias Suarez	0.04 s	C#	2025-06-25 18:22:01
10	Brandon	0.04 s	C#	2025-06-26 15:42:31

#	User	Runtime	Language	Date
1	Rohit Rajak	0.00 s	Go	2024-05-20 21:17:40
2	Ian Howell	0.02 s	Go	2019-08-19 23:30:50
3	Dilawar Mahmood	0.02 s	Go	2020-05-04 21:49:58
4	Norbert Voelker	0.02 s	Go	2021-07-06 00:01:05
5	Hidden user	0.02 s	Go	2022-08-13 20:33:25
6	Eric Martin	0.07 s	Go	2019-01-06 20:14:37
7	Vaughan Andrews	0.07 s	Go	2019-03-27 00:21:23

#	User	Runtime	Language	Date
1	So Kimsu	0.00 s	Haskell	2015-07-22 20:31:19
2	Linus Eklund	0.00 s	Haskell	2016-11-20 16:27:40
3	Johan Meier	0.00 s	Haskell	2016-12-08 22:00:41
4	Matthew Johnson	0.00 s	Haskell	2017-01-07 08:00:16
5	Morten Lohne	0.00 s	Haskell	2017-03-05 14:05:09
6	Brent Yorgey	0.00 s	Haskell	2017-10-31 03:48:55
7	Hidden user	0.00 s	Haskell	2019-09-26 17:09:57
8	Andrés Marzal Varó	0.00 s	Haskell	2020-10-09 00:25:05
9	Quinn Flavel	0.00 s	Haskell	2022-10-30 21:04:27
10	Patrik Lilja	0.01 s	Haskell	2016-04-18 21:37:51

#	User	Runtime	Language	Date
1	Taras Romanyuk	0.04 s	Java	2024-09-19 23:27:21
2	Viktor Widin	0.04 s	Java	2025-04-01 16:02:49
3	Joshua Chin	0.04 s	Java	2025-06-14 06:53:10
4	Alvin Lee	0.04 s	Java	2025-11-06 20:47:51
5	So Kimsu	0.05 s	Java	2015-07-22 20:09:44
6	John Zhuang	0.05 s	Java	2015-07-23 22:28:53
7	Nick Wu	0.05 s	Java	2015-10-05 11:31:26
8	Michael Sullivan	0.05 s	Java	2016-02-19 05:56:40
9	Micah Stairs	0.05 s	Java	2016-03-28 13:39:36
10	Liam Keliher	0.05 s	Java	2016-04-02 16:29:05

#	User	Runtime	Language	Date
1	Kam	0.05 s	JavaScript (Node.js)	2024-04-26 07:24:01
2	Ilya Khrustalev	0.42 s	JavaScript (Node.js)	2021-05-03 18:46:47

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-08-19 21:54:59
2	Ola Næss Kaldestad	0.01 s	JavaScript (SpiderMonkey)	2017-03-01 16:36:40
3	Nguyễn Mạnh Phúc	0.02 s	JavaScript (SpiderMonkey)	2018-08-23 04:40:27
4	Nguyễn Hùng Cường	0.02 s	JavaScript (SpiderMonkey)	2018-08-31 08:57:22
5	Christian Pilegaard Cederquist	0.04 s	JavaScript (SpiderMonkey)	2023-01-26 06:56:49

#	User	Runtime	Language	Date
1	Timothy Gaede	0.32 s	Julia	2025-04-08 16:42:20

#	User	Runtime	Language	Date
1	Development Square	0.11 s	Kotlin	2021-08-05 09:52:01
2	Adam Rankin	0.18 s	Kotlin	2023-10-22 19:35:48
3	Neil Harmon	0.19 s	Kotlin	2019-07-10 09:17:12
4	Phường Lên	0.22 s	Kotlin	2020-01-10 00:48:19

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Nim	2025-06-11 18:00:03

#	User	Runtime	Language	Date
1	Knut Anders Stokke	0.02 s	Python 2	2017-02-15 09:37:41
2	Isaac Lee	0.02 s	Python 2	2017-10-20 01:36:21
3	James Hamm	0.02 s	Python 2	2017-11-24 11:53:58
4	Lars Åström	0.02 s	Python 2	2018-04-02 18:30:55
5	Maj Stenmark	0.02 s	Python 2	2018-04-03 09:20:57
6	Linus Karlsson	0.02 s	Python 2	2018-04-03 17:15:54
7	Steven Tran	0.02 s	Python 2	2018-04-27 23:42:59
8	Dante Bencivenga	0.02 s	Python 2	2022-08-07 19:09:08
9	Felix Grape	0.03 s	Python 2	2016-11-19 15:07:37
10	Çağdaş Öztekin	0.03 s	Python 2	2017-10-07 02:17:44

#	User	Runtime	Language	Date
1	Arnar Bjarni Arnarson	0.02 s	Python 3	2016-04-13 21:44:07
2	Nathan Collins	0.02 s	Python 3	2016-08-19 15:31:34
3	Christian Lindeström	0.02 s	Python 3	2016-08-20 18:32:19
4	Hidden user	0.02 s	Python 3	2016-08-21 15:43:56
5	Herman Karlsson	0.02 s	Python 3	2016-11-11 21:48:44
6	Fredrik Wixenius	0.02 s	Python 3	2016-11-17 14:01:36
7	Siow Yin Sheng	0.02 s	Python 3	2017-01-14 09:00:16
8	Torstein Strømme	0.02 s	Python 3	2017-02-06 16:31:51
9	Øyvind Haarberg	0.02 s	Python 3	2017-02-10 00:40:43
10	Sindre Nerdal	0.02 s	Python 3	2017-03-03 16:17:02

#	User	Runtime	Language	Date
1	Reshab Chhabra	0.03 s	Ruby	2018-03-07 20:06:17
2	Thomas Feld	0.06 s	Ruby	2023-01-05 15:26:03
3	Thomas Marlowe	0.06 s	Ruby	2025-11-07 11:38:28

#	User	Runtime	Language	Date
1	Benedikt Werner	0.00 s	Rust	2020-05-02 03:09:15
2	Bas Dirks	0.00 s	Rust	2022-01-18 12:13:51
3	David Rasch	0.00 s	Rust	2022-10-03 16:16:38
4	Rasmus Andersson	0.00 s	Rust	2024-04-03 16:58:16
5	Vincent Lagerros	0.00 s	Rust	2024-04-04 05:40:23
6	Christoffer Andersson	0.00 s	Rust	2024-04-06 21:17:26
7	Artur Khuziakhmetov	0.01 s	Rust	2023-07-31 18:10:14

#	User	Runtime	Language	Date
1	Felix Stenberg	0.00 s	Zig	2025-04-01 13:23:49

#	User	Length	Language	Date
1	Oscar Cusin	185	C	2024-04-06 11:24:48
2	Noah Ó Donnaile	298	C	2017-02-28 14:25:34
3	Nguyen Vuong Khang Hy	317	C	2019-11-09 16:13:26
4	Marko Grabas	317	C	2020-01-26 14:01:04
5	Artemis	319	C	2020-01-05 05:28:35
6	Geraldo Julius Halim	319	C	2020-01-06 10:43:59
7	Hidden user	319	C	2020-04-09 19:36:30
8	Raymond Yang	325	C	2021-06-28 04:25:31
9	Hidden user	338	C	2015-10-17 11:24:21
10	Wei Siang	346	C	2016-12-19 14:53:21

#	User	Length	Language	Date
1	Brandon	478	C#	2025-06-26 15:42:31
2	Matias Suarez	501	C#	2025-06-25 18:22:01
3	Joshua	641	C#	2025-06-21 00:35:11
4	Marek	1061	C#	2016-10-19 18:41:09
5	Priyanshu Agrawal	1193	C#	2021-04-28 08:49:58
6	Omar N Mohamed Hassan	1196	C#	2021-01-09 22:26:42
7	Joel Marcos Villarroel Molina	1316	C#	2025-06-26 15:55:43
8	Robert Warnestam	1819	C#	2021-05-02 18:10:11
9	Muhammad Charaf	2157	C#	2021-04-13 13:21:48
10	Yuan Zhang	2617	C#	2025-12-08 01:44:02

#	User	Length	Language	Date
1	Angela Qian	151	C++	2025-11-07 18:46:18
2	Kol Greenbaum	226	C++	2024-04-05 00:38:25
3	Zane Yu	246	C++	2018-12-10 14:11:55
4	丁哲宇	253	C++	2021-09-29 09:43:32
5	Sritanu Chakraborty	257	C++	2017-09-24 15:11:31
6	林尚廷	258	C++	2019-01-10 20:20:24
7	Hjalmar Höglund	258	C++	2025-03-27 15:05:37
8	Lixin Wei	259	C++	2017-01-17 13:50:28
9	Subhadeep Chandra	264	C++	2020-05-02 17:14:57
10	Timothy White	265	C++	2021-09-21 03:29:36

#	User	Length	Language	Date
1	Vaughan Andrews	421	Go	2019-03-27 00:21:23
2	Dilawar Mahmood	547	Go	2020-05-04 21:49:58
3	Ian Howell	558	Go	2019-08-19 23:30:50
4	Norbert Voelker	873	Go	2021-07-06 00:01:05
5	Hidden user	1209	Go	2022-08-13 20:33:25
6	Eric Martin	2709	Go	2019-01-06 20:14:37
7	Rohit Rajak	3618	Go	2024-05-20 21:17:40

#	User	Length	Language	Date
1	So Kimsu	265	Haskell	2015-07-22 20:31:19
2	Patrik Lilja	301	Haskell	2016-04-18 21:37:51
3	Morten Lohne	349	Haskell	2017-03-05 19:25:45
4	Quinn Flavel	352	Haskell	2022-10-30 21:04:27
5	Johan Meier	377	Haskell	2016-12-08 22:00:41
6	Brent Yorgey	449	Haskell	2017-10-31 03:48:55
7	Andrés Marzal Varó	586	Haskell	2020-10-09 00:25:05
8	Linus Eklund	694	Haskell	2016-11-20 16:27:40
9	Francisco González	764	Haskell	2020-10-10 10:56:43
10	Sergio Martín Sempere	843	Haskell	2020-10-06 00:18:06

#	User	Length	Language	Date
1	Sam Adekunle	330	Java	2017-12-22 22:23:11
2	Nam Phan Thành	433	Java	2018-08-31 07:40:13
3	Joshua Navarro	443	Java	2021-05-18 17:10:10
4	Christian Schleif	450	Java	2020-04-30 00:12:29
5	sunil Reddy	500	Java	2020-11-13 18:43:30
6	Jiru Xu	504	Java	2017-09-14 11:44:55
7	Denis Chirita	507	Java	2021-06-05 12:51:50
8	Jevgenijus Cistiakovas	517	Java	2019-12-18 15:59:43
9	Nick Wu	525	Java	2015-10-05 11:31:26
10	Jesse Slater	525	Java	2021-02-14 22:50:14

#	User	Length	Language	Date
1	Kam	1079	JavaScript (Node.js)	2024-04-26 07:24:01
2	Ilya Khrustalev	1463	JavaScript (Node.js)	2021-05-03 18:46:47

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	92	JavaScript (SpiderMonkey)	2023-01-26 06:56:49
2	Bjørn Chr. Soltvedt	105	JavaScript (SpiderMonkey)	2024-03-05 14:46:58
3	Nguyễn Hùng Cường	170	JavaScript (SpiderMonkey)	2018-08-31 08:57:22
4	Nguyễn Mạnh Phúc	201	JavaScript (SpiderMonkey)	2018-08-23 04:40:27
5	Ola Næss Kaldestad	482	JavaScript (SpiderMonkey)	2017-03-01 16:36:40

#	User	Length	Language	Date
1	Timothy Gaede	405	Julia	2025-04-08 16:42:20

#	User	Length	Language	Date
1	Phường Lên	390	Kotlin	2020-01-10 00:48:19
2	Neil Harmon	847	Kotlin	2019-07-10 09:17:12
3	Adam Rankin	958	Kotlin	2023-10-22 19:35:48
4	Development Square	2690	Kotlin	2021-08-05 09:52:01

#	User	Length	Language	Date
1	Hidden user	355	Nim	2025-06-11 18:00:03

#	User	Length	Language	Date
1	Thomas Feld	159	Python 2	2019-09-10 16:53:19
2	Johan Lyts	179	Python 2	2019-07-31 22:03:51
3	Steven Tran	257	Python 2	2018-04-27 23:42:59
4	Isaac Lee	263	Python 2	2017-10-20 01:36:21
5	Felix Grape	264	Python 2	2016-11-19 15:07:37
6	James Hamm	301	Python 2	2017-11-24 11:53:58
7	Lars Åström	321	Python 2	2018-04-02 18:30:55
8	Fatima Afzali	343	Python 2	2019-02-09 18:38:36
9	Andreas Björklund	394	Python 2	2019-03-13 08:13:03
10	Jacob Gummesson Atroshi	398	Python 2	2019-05-22 12:43:18

#	User	Length	Language	Date
1	Jaydan Aladro	70	Python 3	2022-11-18 22:23:21
2	Angela Qian	76	Python 3	2025-11-08 16:57:55
3	Michael Wu	78	Python 3	2025-11-07 02:59:20
4	Shashank Bhatt	80	Python 3	2023-01-03 06:41:07
5	Lawry Sorenson	89	Python 3	2023-12-09 02:53:46
6	Alvin Lee	99	Python 3	2025-11-06 20:59:10
7	Mattéo Delabre	102	Python 3	2022-11-18 16:46:24
8	Benjamin Z White	103	Python 3	2023-03-27 22:15:10
9	Lee Isaac	118	Python 3	2022-12-24 15:09:24
10	a_b__c	128	Python 3	2021-03-07 13:04:47

#	User	Length	Language	Date
1	Thomas Feld	60	Ruby	2023-01-05 15:45:35
2	Thomas Marlowe	65	Ruby	2025-11-07 11:57:20
3	Reshab Chhabra	220	Ruby	2018-03-07 20:06:17

#	User	Length	Language	Date
1	Artur Khuziakhmetov	363	Rust	2023-07-31 18:11:42
2	David Rasch	421	Rust	2022-10-03 16:16:38
3	Vincent Lagerros	477	Rust	2024-04-04 05:40:23
4	Bas Dirks	570	Rust	2022-01-18 12:13:51
5	Rasmus Andersson	694	Rust	2024-04-03 16:58:16
6	Benedikt Werner	726	Rust	2020-05-02 03:12:34
7	Christoffer Andersson	7939	Rust	2024-04-06 21:18:31

#	User	Length	Language	Date
1	Felix Stenberg	2123	Zig	2025-04-01 13:23:49

Solution running time distribution