Problem A
Knights in Fen — Problem Statistics

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Submissions	4808
Accepted submissions	1555
Submission ratio	32.34%
Authors	797
Full solves [?]	683
Full solve Ratio	85.70%

#	User	Runtime	Language	Date
1	Per Olofsson	0.00 s	C	2011-10-13 11:26:25
2	Sabit Zahin	0.00 s	C	2015-10-20 19:54:20
3	Martin Jackson	0.00 s	C	2017-05-17 03:27:39
4	Marcus Ramse	0.00 s	C	2017-09-03 00:56:35
5	Mikael K Eriksson	0.00 s	C	2022-08-22 07:45:34
6	Mats Linander	0.01 s	C	2006-10-02 00:02:19
7	Henrik Sjögren	0.03 s	C	2006-09-27 12:43:51
8	Marcus Larsson	0.03 s	C	2013-03-20 08:21:54
9	Oscar Cusin	0.31 s	C	2024-04-21 12:57:39

#	User	Runtime	Language	Date
1	Karl Tillström	0.04 s	C#	2017-07-06 08:05:53
2	Tomz Phoz	0.04 s	C#	2017-10-12 17:40:07
3	Simon Ståhlberg	0.05 s	C#	2014-04-07 13:34:36
4	Artemy Gavrilov	0.06 s	C#	2024-02-12 07:03:49
5	Jose Ignacio Villa Molina	0.07 s	C#	2024-06-21 22:42:19
6	Robert Warnestam	0.16 s	C#	2017-01-18 16:12:21
7	Lars Eriksson	0.21 s	C#	2021-02-25 22:10:53
8	Lars Eriksson	0.25 s	C#	2024-07-03 16:10:48
9	Mats Edvardsson	0.29 s	C#	2018-01-08 22:04:42
10	Martin Ahlström	0.31 s	C#	2017-10-31 07:32:19

#	User	Runtime	Language	Date
1	Hidden user	0.12 s	Common Lisp	2019-08-13 22:05:41

#	User	Runtime	Language	Date
1	Norbert Voelker	0.46 s	Go	2022-01-02 21:48:00
2	Matt Steen	0.79 s	Go	2020-11-15 03:18:25

#	User	Runtime	Language	Date
1	Hidden user	0.20 s	Haskell	2022-08-12 22:39:11
2	Murray Campbell	0.50 s	Haskell	2019-05-02 09:43:20

#	User	Runtime	Language	Date
1	Per Wennersten	0.06 s	Java	2006-09-25 22:25:50
2	Fredrik Atmer	0.07 s	Java	2007-09-25 22:19:19
3	Simon Klein	0.07 s	Java	2012-01-23 14:44:21
4	Kai Widell Niigata	0.08 s	Java	2014-04-02 16:40:25
5	Nathaniel Lahn	0.08 s	Java	2015-10-15 00:40:55
6	Hidden user	0.09 s	Java	2007-09-26 21:48:41
7	Martin Berntsson	0.09 s	Java	2013-03-21 18:39:32
8	Erik Odenman	0.09 s	Java	2013-04-02 18:41:28
9	Anders Ye	0.09 s	Java	2014-04-02 14:08:26
10	Tony Kwan	0.09 s	Java	2022-06-29 08:56:56

#	User	Runtime	Language	Date
1	Albin Mörner	0.04 s	JavaScript (SpiderMonkey)	2017-07-06 15:20:15
2	Christian Pilegaard Cederquist	0.05 s	JavaScript (SpiderMonkey)	2023-06-21 08:44:23
3	Martin Ahlström	0.08 s	JavaScript (SpiderMonkey)	2017-07-05 22:23:19
4	Erik Nilsson	0.20 s	JavaScript (SpiderMonkey)	2017-07-11 00:42:45
5	Bjørn Chr. Soltvedt	0.37 s	JavaScript (SpiderMonkey)	2018-11-06 02:55:02

#	User	Runtime	Language	Date
1	Timothy Gaede	0.93 s	Julia	2026-01-15 08:26:10

#	User	Runtime	Language	Date
1	Sivert Paulsen	0.29 s	Kotlin	2026-03-24 12:34:41

#	User	Runtime	Language	Date
1	Andreas Serra	0.08 s	Python 2	2014-01-16 19:15:35
2	Hermon Mulat	0.08 s	Python 2	2018-12-09 04:02:29
3	Søren Hjort	0.08 s	Python 2	2019-09-29 14:26:44
4	Matias Frank Jensen	0.09 s	Python 2	2019-09-29 15:55:02
5	Ailo Aasen	0.10 s	Python 2	2015-10-17 12:08:09
6	Godmar Back	0.11 s	Python 2	2015-10-15 04:06:17
7	Maj Stenmark	0.11 s	Python 2	2019-09-30 21:17:05
8	Lars Åström	0.13 s	Python 2	2019-10-01 11:47:27
9	Andreas Björklund	0.14 s	Python 2	2020-10-25 08:33:31
10	Thomas Feld	0.15 s	Python 2	2019-10-21 13:48:22

#	User	Runtime	Language	Date
1	Trym Rødvei	0.04 s	Python 3	2019-04-07 20:02:16
2	Ole Vik Lysne	0.04 s	Python 3	2025-01-24 14:24:53
3	Amund Lindstøl	0.05 s	Python 3	2019-04-04 20:47:51
4	Simen Hornnes	0.05 s	Python 3	2019-04-07 23:53:06
5	David Phillips	0.05 s	Python 3	2019-04-23 17:30:19
6	Kristian Nore	0.06 s	Python 3	2024-04-02 20:44:48
7	Fabian Frich	0.06 s	Python 3	2026-03-06 14:19:36
8	Jakob Kallestad	0.08 s	Python 3	2019-02-06 18:39:30
9	트리거왕	0.08 s	Python 3	2024-02-13 03:35:31
10	Sonny Chan	0.09 s	Python 3	2020-05-12 04:21:24

#	User	Runtime	Language	Date
1	Gustaf Bergmark	0.00 s	Rust	2023-04-20 21:45:49
2	Ole Vik Lysne	0.00 s	Rust	2024-03-14 23:18:48
3	Vincent Lagerros	0.00 s	Rust	2024-04-10 20:43:37
4	Jørgen Nedregård	0.01 s	Rust	2026-03-10 11:30:13
5	Jonathan Jiang	0.02 s	Rust	2021-04-17 03:26:03
6	Rasmus Andersson	0.05 s	Rust	2024-04-22 17:34:29
7	Noah Webber	0.05 s	Rust	2025-09-21 23:25:29
8	Stian Soltvedt	0.06 s	Rust	2019-03-22 08:42:48
9	Gavin Gray	0.08 s	Rust	2020-11-16 21:05:47
10	gard heine kalland	0.13 s	Rust	2024-03-26 12:48:46

#	User	Length	Language	Date
1	Oscar Cusin	1949	C	2024-04-21 12:59:22
2	Per Olofsson	2164	C	2011-10-03 18:35:47
3	Martin Jackson	2298	C	2017-05-17 03:27:39
4	Mats Linander	2431	C	2006-10-02 00:02:19
5	Marcus Ramse	2880	C	2017-09-03 01:01:07
6	Henrik Sjögren	2971	C	2006-09-27 12:27:04
7	Mikael K Eriksson	3260	C	2022-08-22 07:45:34
8	Sabit Zahin	3730	C	2015-10-20 19:54:20
9	Marcus Larsson	4379	C	2013-03-20 08:21:54

#	User	Length	Language	Date
1	Dỗn Lùng	2978	C#	2019-12-01 08:33:04
2	Martin Ahlström	3034	C#	2017-10-31 07:32:19
3	Jose Ignacio Villa Molina	5120	C#	2024-06-21 22:43:17
4	Artemy Gavrilov	5489	C#	2024-02-12 07:03:49
5	Karl Tillström	6361	C#	2017-07-06 07:37:39
6	Tomz Phoz	6393	C#	2018-01-17 22:05:40
7	Lars Eriksson	7195	C#	2021-02-25 22:10:53
8	Lars Eriksson	7195	C#	2024-07-03 16:10:48
9	Simon Ståhlberg	7857	C#	2014-04-06 15:10:21
10	Mats Edvardsson	7957	C#	2018-01-08 22:04:42

#	User	Length	Language	Date
1	Emmanuel Anaya	1037	C++	2020-11-10 19:56:05
2	Zhijie CS	1153	C++	2024-02-07 11:25:20
3	Thiên Tài Zero	1163	C++	2017-11-03 14:21:38
4	Stefan Schöninger	1227	C++	2019-04-23 19:35:56
5	Johan Wind	1250	C++	2018-05-06 16:53:00
6	Ernest Ng Zi Xuan	1290	C++	2024-03-27 10:44:59
7	ETHAN EWER	1293	C++	2023-09-15 06:54:27
8	blameazu	1309	C++	2024-04-24 07:39:46
9	Hidden user	1316	C++	2018-06-21 15:18:24
10	Emil Lenngren	1347	C++	2013-04-10 14:14:49

#	User	Length	Language	Date
1	Hidden user	2282	Common Lisp	2019-08-13 21:52:35

#	User	Length	Language	Date
1	Norbert Voelker	2352	Go	2022-01-02 21:48:00
2	Matt Steen	2601	Go	2020-11-15 03:18:25

#	User	Length	Language	Date
1	Hidden user	2893	Haskell	2022-08-12 22:39:11
2	Murray Campbell	2908	Haskell	2019-05-02 09:43:20

#	User	Length	Language	Date
1	Nathan Huckleberry	1786	Java	2017-04-10 02:53:01
2	Eric Leow Yu Quan	1809	Java	2021-12-21 10:23:50
3	Micah Stairs	2224	Java	2015-10-13 15:08:42
4	Doug Goodman	2454	Java	2018-01-27 17:42:34
5	Tony Kwan	2491	Java	2022-06-29 08:56:56
6	Jan Štola	2513	Java	2015-05-28 10:30:50
7	Fredrik Atmer	2703	Java	2007-09-25 23:37:12
8	Simon Klein	2856	Java	2012-01-23 14:52:17
9	Joseph Li	2911	Java	2024-03-08 22:26:37
10	Paul Boddington	2990	Java	2016-05-07 01:22:16

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	1443	JavaScript (SpiderMonkey)	2018-11-06 20:03:22
2	Albin Mörner	1866	JavaScript (SpiderMonkey)	2017-07-05 01:51:21
3	Martin Ahlström	2156	JavaScript (SpiderMonkey)	2017-07-05 22:23:19
4	Christian Pilegaard Cederquist	2737	JavaScript (SpiderMonkey)	2023-06-21 08:44:23
5	Erik Nilsson	4115	JavaScript (SpiderMonkey)	2017-07-11 00:42:45

#	User	Length	Language	Date
1	Timothy Gaede	2740	Julia	2026-01-15 08:26:10

#	User	Length	Language	Date
1	Sivert Paulsen	4311	Kotlin	2026-03-24 02:25:23

#	User	Length	Language	Date
1	Thomas Feld	780	Python 2	2019-10-21 13:48:22
2	Godmar Back	1045	Python 2	2015-10-15 04:06:17
3	Andreas Björklund	1172	Python 2	2020-10-25 08:33:31
4	Lars Åström	1300	Python 2	2019-10-01 11:47:27
5	Oskar Haarklou Veileborg	1307	Python 2	2019-09-29 11:34:59
6	Jesper Öqvist	1424	Python 2	2018-11-04 23:50:11
7	Hermon Mulat	1797	Python 2	2018-12-09 04:02:29
8	Ailo Aasen	1949	Python 2	2015-10-17 12:08:09
9	Søren Hjort	1960	Python 2	2019-09-29 14:26:44
10	Christofer Ohlsson	1979	Python 2	2017-02-02 21:57:12

#	User	Length	Language	Date
1	Ole Vik Lysne	135	Python 3	2026-03-08 18:29:32
2	Kristian Nore	145	Python 3	2024-04-03 03:24:39
3	Benjamin Ye	369	Python 3	2024-03-02 07:20:50
4	Karl Walfridson	660	Python 3	2025-04-13 17:48:01
5	Peter Stauder	720	Python 3	2023-03-08 21:56:16
6	Christian Lindeström	881	Python 3	2016-12-13 07:38:38
7	Hao Yi	942	Python 3	2024-03-13 11:52:07
8	Eivind Hamre	1011	Python 3	2026-03-24 19:01:38
9	Godmar Back	1041	Python 3	2025-09-20 16:01:55
10	Nicholas Russell Saerang	1094	Python 3	2024-04-23 19:47:08

#	User	Length	Language	Date
1	gard heine kalland	2401	Rust	2024-03-26 12:48:46
2	Christoffer Andersson	2700	Rust	2024-04-20 12:28:59
3	Rasmus Andersson	2811	Rust	2024-04-22 17:34:29
4	Ole Vik Lysne	2850	Rust	2024-03-15 12:04:46
5	Jonathan Jiang	2957	Rust	2021-04-17 03:04:48
6	Jørgen Nedregård	3266	Rust	2026-03-10 11:29:39
7	Noah Webber	3425	Rust	2025-09-21 23:25:29
8	Vincent Lagerros	3438	Rust	2024-04-10 20:34:04
9	Stian Soltvedt	5519	Rust	2019-03-22 08:42:48
10	Gavin Gray	7964	Rust	2020-11-16 21:05:47

Solution running time distribution