Problem J
Surveillance Squared — Problem Statistics

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Submissions	392
Accepted submissions	89
Submission ratio	22.70%
Authors	82
Full solves [?]	54
Full solve Ratio	65.85%

#	User	Runtime	Language	Date
1	Daniel Eliasson	0.02 s	C	2022-06-03 15:37:07
2	Bergur Snorrason	0.11 s	C	2019-06-24 01:01:27

#	User	Runtime	Language	Date
1	Alexander Kravberg	0.01 s	C++	2023-08-11 00:03:18
2	Bence Deák	0.01 s	C++	2024-10-28 19:02:30
3	Matthew Li	0.01 s	C++	2025-03-20 02:05:42
4	Andrew Baas	0.02 s	C++	2015-10-19 04:32:31
5	Jackson Abascal	0.02 s	C++	2017-05-08 01:59:06
6	YanHao Ling	0.02 s	C++	2017-12-16 09:05:25
7	Dmitry Lyubshin	0.02 s	C++	2018-06-18 01:25:28
8	Hidden user	0.02 s	C++	2020-07-28 20:58:07
9	Joakim Blikstad	0.02 s	C++	2021-08-29 21:34:55
10	Angela Qian	0.02 s	C++	2025-03-25 07:10:33

#	User	Runtime	Language	Date
1	Brent Yorgey	0.06 s	Haskell	2022-11-25 16:31:31
2	Matthew Li	0.58 s	Haskell	2025-03-20 04:57:03

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.12 s	Java	2024-01-13 18:42:50
2	Martin Jakobsson	0.24 s	Java	2017-12-15 12:53:19
3	Finn Lidbetter	0.26 s	Java	2017-08-12 14:36:15
4	Bjørn Dons	0.28 s	Java	2025-03-30 22:13:23
5	Micah Stairs	0.35 s	Java	2017-07-01 23:41:46
6	Olav Røthe Bakken	0.40 s	Java	2018-01-09 09:37:57
7	Nick Wu	0.72 s	Java	2016-09-06 02:39:13
8	Doug Goodman	0.76 s	Java	2018-05-20 21:49:57
9	Nolan Mangal	1.18 s	Java	2021-10-18 18:24:47
10	Martijn Muijsers	1.93 s	Java	2017-05-17 16:27:28

#	User	Runtime	Language	Date
1	Timothy Gaede	1.88 s	Julia	2025-12-09 09:20:15

#	User	Runtime	Language	Date
1	Neal Zane	0.16 s	Python 2	2016-07-08 16:52:55
2	Andrew Kronser	0.69 s	Python 2	2017-10-09 14:20:32

#	User	Runtime	Language	Date
1	Hidden user	0.12 s	Python 3	2026-02-15 14:41:51
2	Hrant Hovhannisyan	0.15 s	Python 3	2025-11-25 06:57:46
3	Sun Yitao	0.20 s	Python 3	2022-12-07 14:27:29
4	Oskar Haarklou Veileborg	0.28 s	Python 3	2020-02-18 09:07:18
5	Vincent Tandya	0.85 s	Python 3	2021-04-10 14:34:06
6	Matthew McCaskill	1.03 s	Python 3	2021-10-11 19:57:32
7	Cian Ruane	1.25 s	Python 3	2018-02-27 16:22:23
8	Greg Hamerly	3.03 s	Python 3	2019-10-17 23:04:59
9	Melody Horn	3.24 s	Python 3	2017-10-09 18:40:46

#	User	Length	Language	Date
1	Daniel Eliasson	1900	C	2022-06-03 15:37:07
2	Bergur Snorrason	2570	C	2019-06-24 01:01:27

#	User	Length	Language	Date
1	Derrick Liu	270	C++	2025-09-24 04:02:37
2	Angela Qian	270	C++	2025-09-24 04:05:23
3	Jeremy Lim	726	C++	2025-07-23 10:45:17
4	YanHao Ling	838	C++	2017-12-16 09:05:25
5	Atli Fannar Franklín	856	C++	2023-06-22 17:25:54
6	Nathaniel Brown	937	C++	2020-10-14 17:38:24
7	David Wärn	979	C++	2015-08-28 21:21:46
8	Martin Hesselborn	1070	C++	2015-12-21 17:37:29
9	David Berard	1100	C++	2018-01-07 21:07:23
10	Jackson Abascal	1124	C++	2017-05-08 01:59:06

#	User	Length	Language	Date
1	Matthew Li	476	Haskell	2025-03-20 05:25:34
2	Brent Yorgey	16845	Haskell	2022-11-25 16:31:31

#	User	Length	Language	Date
1	Doug Goodman	829	Java	2018-05-20 21:49:57
2	Olav Røthe Bakken	1557	Java	2018-01-09 09:37:57
3	Finn Lidbetter	1646	Java	2017-08-12 14:36:15
4	Nolan Mangal	1718	Java	2021-10-18 18:24:47
5	Martijn Muijsers	1808	Java	2017-05-17 16:27:28
6	Nick Wu	2193	Java	2016-09-06 02:39:13
7	Micah Stairs	2598	Java	2017-07-01 23:41:46
8	Martin Jakobsson	3049	Java	2017-12-15 12:53:19
9	Bjørn Dons	5802	Java	2025-03-30 22:13:23
10	Sven Rönnbäck	10667	Java	2024-01-13 18:42:50

#	User	Length	Language	Date
1	Timothy Gaede	848	Julia	2025-12-09 09:20:15

#	User	Length	Language	Date
1	Neal Zane	981	Python 2	2016-07-08 16:52:55
2	Andrew Kronser	1331	Python 2	2017-10-09 14:20:32

#	User	Length	Language	Date
1	Hrant Hovhannisyan	701	Python 3	2025-11-25 06:57:46
2	Oskar Haarklou Veileborg	808	Python 3	2020-02-18 09:04:33
3	Matthew McCaskill	910	Python 3	2021-10-11 19:57:32
4	Melody Horn	938	Python 3	2017-10-09 18:40:46
5	Sun Yitao	1130	Python 3	2022-12-07 14:27:29
6	Cian Ruane	1176	Python 3	2018-02-27 16:22:23
7	Greg Hamerly	1235	Python 3	2019-10-17 23:04:59
8	Hidden user	1434	Python 3	2026-02-15 14:41:51
9	Vincent Tandya	1674	Python 3	2021-04-10 14:34:06

Solution running time distribution