Problem A
Islands — Problem Statistics

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Submissions	13368
Accepted submissions	5805
Submission ratio	43.42%
Authors	4885
Full solves [?]	4588
Full solve Ratio	93.92%

#	User	Runtime	Language	Date
1	Chenzhang Hu	0.03 s	Bash	2024-04-10 14:09:40

#	User	Runtime	Language	Date
1	Sturle Elvestad	0.02 s	C#	2019-02-10 19:56:21
2	Carter Morgan	0.02 s	C#	2021-03-13 18:10:57
3	Lindsay Wilde	0.02 s	C#	2021-03-14 03:43:14
4	Seth Gunsay	0.02 s	C#	2021-03-14 19:13:13
5	Eric O'Donoghue	0.02 s	C#	2021-03-15 17:36:42
6	Matthew Hooper	0.02 s	C#	2021-03-15 21:39:10
7	Tyler Crum	0.02 s	C#	2021-03-16 20:35:55
8	Devin Schwehr	0.02 s	C#	2021-03-17 14:47:28
9	Kelsey Hunzeker	0.02 s	C#	2021-03-17 17:43:03
10	Kelsey Hunzeker	0.02 s	C#	2021-03-17 17:45:56

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Common Lisp	2019-07-13 10:20:13

#	User	Runtime	Language	Date
1	Matthew Hooper	0.04 s	F#	2021-03-18 06:14:53
2	Jacob Harris Cryer Kragh	0.04 s	F#	2022-09-07 19:29:28

#	User	Runtime	Language	Date
1	Akhikumar Indurti	0.07 s	Go	2018-10-13 00:59:07
2	Arne Philipeit	0.07 s	Go	2019-02-20 03:27:37
3	Krzysztof Gibuła	0.08 s	Go	2021-04-14 23:29:47
4	Norbert Voelker	0.08 s	Go	2021-04-15 00:58:00

#	User	Runtime	Language	Date
1	Mark Lekkerkerker	0.01 s	Haskell	2020-06-23 17:24:35
2	Jan Hrček	0.01 s	Haskell	2021-04-05 08:26:19
3	Mason Barnhill	0.01 s	Haskell	2023-06-10 21:24:20
4	Greg Rosser	0.01 s	Haskell	2024-01-13 14:09:35
5	Steinar Simonnes	0.01 s	Haskell	2024-01-29 08:38:48
6	Hidden user	0.06 s	Haskell	2019-10-30 17:32:20

#	User	Runtime	Language	Date
1	Bas te Kolste	0.04 s	Java	2024-09-05 18:45:45
2	Choi Yat Long	0.04 s	Java	2024-10-29 13:40:16
3	Hidden user	0.04 s	Java	2024-10-30 03:18:20
4	GOH MING HAN	0.04 s	Java	2024-10-30 03:18:35
5	Yap Xavier	0.04 s	Java	2024-10-30 04:26:21
6	Goh Kai Swee Vincent	0.04 s	Java	2024-10-30 04:40:00
7	Wong Yeow Kang	0.04 s	Java	2024-10-30 05:06:24
8	Evan Luo Zi Xuan	0.04 s	Java	2024-10-30 06:26:08
9	Jiang Wenjie	0.04 s	Java	2024-10-30 06:35:02
10	Yeong Zirui	0.04 s	Java	2024-10-30 06:49:24

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	JavaScript (Node.js)	2023-11-22 05:08:16
2	Peter Kedemo	0.42 s	JavaScript (Node.js)	2019-12-23 14:26:20

#	User	Runtime	Language	Date
1	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-06-18 09:56:06
2	Bjørn Chr. Soltvedt	0.03 s	JavaScript (SpiderMonkey)	2018-12-03 00:54:23
3	Christian Pilegaard Cederquist	0.03 s	JavaScript (SpiderMonkey)	2023-01-14 10:34:05
4	Zach Tschetter	0.03 s	JavaScript (SpiderMonkey)	2023-05-16 00:57:04
5	Hidden user	0.03 s	JavaScript (SpiderMonkey)	2024-09-06 20:45:58
6	Ben Armstrong	0.03 s	JavaScript (SpiderMonkey)	2024-12-06 08:05:12

#	User	Runtime	Language	Date
1	Hidden user	0.51 s	Julia	2025-03-11 19:00:07
2	Timothy Gaede	0.67 s	Julia	2024-06-21 07:50:10

#	User	Runtime	Language	Date
1	Jacob Huebner	0.14 s	Kotlin	2022-03-30 22:40:53
2	Witte, Chet	0.14 s	Kotlin	2022-04-05 19:36:10
3	Hidden user	0.17 s	Kotlin	2019-12-22 03:01:38
4	Adam Rankin	0.19 s	Kotlin	2023-05-05 23:49:44
5	Sam Keyser	0.20 s	Kotlin	2023-05-17 17:25:34
6	Benjamin Ye	0.20 s	Kotlin	2024-01-07 07:58:26
7	Phường Lên	0.21 s	Kotlin	2019-12-22 03:35:52
8	Michael Spear	0.24 s	Kotlin	2020-11-21 19:54:15
9	Emil Wihlander	0.24 s	Kotlin	2023-07-26 00:13:05
10	Vegard Itland	0.27 s	Kotlin	2019-01-29 00:29:08

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2019-12-05 18:47:40
2	Zach Ventimiglia	0.00 s	Pascal	2025-04-02 15:46:40

#	User	Runtime	Language	Date
1	Ahmad Barhamje	0.02 s	Perl	2025-04-30 20:50:06
2	Saito Ta	0.26 s	Perl	2024-04-09 02:31:41

#	User	Runtime	Language	Date
1	Petr Trofimov	0.01 s	PHP	2021-05-01 12:54:04

#	User	Runtime	Language	Date
1	Cian Ruane	0.03 s	Python 2	2018-04-10 21:41:17
2	Ciara Godwin	0.03 s	Python 2	2018-04-10 22:45:51
3	Benjamin Floyd	0.03 s	Python 2	2019-02-26 00:21:58
4	Øyvind Haarberg	0.04 s	Python 2	2018-10-24 03:08:08
5	Lars Åström	0.04 s	Python 2	2018-11-01 10:37:04
6	Björn Magnusson	0.04 s	Python 2	2018-11-02 22:21:43
7	Jesper Öqvist	0.04 s	Python 2	2018-11-04 00:37:16
8	Måns Magnusson	0.04 s	Python 2	2018-11-04 21:52:42
9	Maj Stenmark	0.04 s	Python 2	2019-09-09 20:28:36
10	Andreas Björklund	0.04 s	Python 2	2019-11-30 11:14:37

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	Python 3	2018-04-05 04:41:53
2	Daniel Nogueira	0.02 s	Python 3	2018-04-14 08:46:18
3	Andre Pratama	0.02 s	Python 3	2018-04-29 08:49:14
4	Kasra Ghodsi	0.02 s	Python 3	2018-06-16 23:07:13
5	Bjørn Dons	0.02 s	Python 3	2018-11-05 07:38:20
6	Hudson Chromy	0.02 s	Python 3	2018-11-06 15:03:11
7	Zach Zundel	0.02 s	Python 3	2019-01-17 01:12:04
8	Jakob Kallestad	0.02 s	Python 3	2019-01-21 19:15:35
9	Jacky Dai	0.02 s	Python 3	2019-01-30 02:05:09
10	Brian Bui	0.02 s	Python 3	2019-02-20 03:45:05

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	Ruby	2019-10-01 21:13:53
2	Macdara mac an tSionnaigh	0.05 s	Ruby	2019-10-03 11:48:09
3	Alexander Bilde Pedersen	0.06 s	Ruby	2023-05-05 17:35:40
4	Michael Go	0.07 s	Ruby	2024-05-25 06:30:13
5	Matzuka	0.07 s	Ruby	2025-11-01 12:22:38
6	Eugen Neagoe	0.08 s	Ruby	2026-02-16 13:23:03

#	User	Runtime	Language	Date
1	Grettir Heimisson	0.02 s	Zig	2025-11-03 16:42:37

#	User	Length	Language	Date
1	Chenzhang Hu	584	Bash	2024-04-10 14:09:40

#	User	Length	Language	Date
1	Matthew Weston	524	C	2022-04-13 20:43:10
2	Shehab Ahmed Hatem	937	C	2023-11-16 17:50:51
3	Pim Heeman	979	C	2019-05-11 10:02:56
4	Martin Blom	1289	C	2023-11-10 13:23:53
5	Rares Andrei Matei	1423	C	2024-11-07 12:06:00
6	Xiaochi Wang	1451	C	2022-09-25 12:46:12
7	Charlie Bouthoorn	1459	C	2019-05-10 15:49:54
8	Sambit Palit	1541	C	2021-06-30 03:35:25
9	Mikael K Eriksson	1626	C	2021-03-22 11:26:48
10	Mirel Cosulschi	1727	C	2024-08-21 16:15:25

#	User	Length	Language	Date
1	Anthony Ye	1534	C#	2025-07-25 20:34:43
2	Esty Crow	1740	C#	2025-05-23 12:36:38
3	clarence chen	1812	C#	2025-05-16 19:07:48
4	Brandon Walton	1933	C#	2021-03-19 17:02:34
5	Laurens Fijn van Draat	1981	C#	2024-09-05 18:39:32
6	Carter Morgan	1985	C#	2021-03-13 18:10:57
7	Eric O'Donoghue	2015	C#	2021-03-15 17:36:42
8	RecompiledBirds	2151	C#	2025-09-30 00:24:20
9	Matthew Hooper	2490	C#	2021-03-15 19:10:40
10	Sturle Elvestad	2515	C#	2019-02-10 19:56:21

#	User	Length	Language	Date
1	Johan Wind	524	C++	2018-04-10 17:03:24
2	holyvia marcella	528	C++	2021-10-26 03:44:18
3	Roger Chen	533	C++	2022-10-25 02:55:52
4	Matthew Joseph Schallenkamp	542	C++	2019-02-23 00:38:58
5	Tuukka Korhonen	567	C++	2021-09-29 17:52:06
6	Hidden user	578	C++	2018-04-28 19:17:36
7	Hidden user	585	C++	2024-09-02 20:17:13
8	Đậu Huy Minh	587	C++	2022-12-02 18:17:09
9	Aamir	607	C++	2020-01-21 16:56:20
10	Yeung Man Tsung	622	C++	2022-11-25 09:01:05

#	User	Length	Language	Date
1	Hidden user	1215	Common Lisp	2019-07-13 10:21:50

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	1072	F#	2022-09-07 19:29:28
2	Matthew Hooper	1214	F#	2021-03-18 06:14:53

#	User	Length	Language	Date
1	Krzysztof Gibuła	781	Go	2021-04-14 23:29:47
2	Arne Philipeit	1310	Go	2019-02-20 03:27:37
3	Norbert Voelker	1478	Go	2021-04-15 01:01:21
4	Akhikumar Indurti	1993	Go	2018-10-13 00:59:07

#	User	Length	Language	Date
1	Mason Barnhill	1168	Haskell	2023-06-10 21:31:32
2	Steinar Simonnes	1209	Haskell	2024-01-29 08:38:48
3	Mark Lekkerkerker	1364	Haskell	2020-06-23 17:24:35
4	Jan Hrček	1790	Haskell	2021-04-05 08:38:08
5	Greg Rosser	3320	Haskell	2024-01-13 14:09:35
6	Hidden user	15721	Haskell	2019-10-30 17:32:20

#	User	Length	Language	Date
1	Neo Wei Jun Samuel	537	Java	2025-03-24 09:36:31
2	Anders Georg Frølich Hansen	828	Java	2023-11-07 18:56:23
3	Doug Goodman	830	Java	2019-05-17 17:34:09
4	Bhavesh Hiranand Chainani	832	Java	2019-10-28 05:14:23
5	Nathan Nguyen	837	Java	2020-07-04 19:13:53
6	Jamer José Rebolledo Quiroz	879	Java	2018-07-28 04:45:16
7	Kai Qu	912	Java	2018-11-12 10:21:13
8	Terry Morris	912	Java	2025-12-16 19:47:30
9	Yixing Jiang	913	Java	2021-04-09 05:12:25
10	Hidden user	913	Java	2024-08-17 09:06:53

#	User	Length	Language	Date
1	Hidden user	1058	JavaScript (Node.js)	2023-11-22 05:08:16
2	Peter Kedemo	1322	JavaScript (Node.js)	2019-12-23 14:26:20

#	User	Length	Language	Date
1	Jimmy Gustafsson	291	JavaScript (SpiderMonkey)	2024-06-18 09:56:06
2	Christian Pilegaard Cederquist	598	JavaScript (SpiderMonkey)	2023-01-14 10:34:05
3	Hidden user	675	JavaScript (SpiderMonkey)	2024-09-06 20:45:58
4	Ben Armstrong	680	JavaScript (SpiderMonkey)	2024-12-06 08:05:12
5	Zach Tschetter	735	JavaScript (SpiderMonkey)	2023-05-16 00:57:04
6	Bjørn Chr. Soltvedt	1102	JavaScript (SpiderMonkey)	2018-12-03 00:54:23

#	User	Length	Language	Date
1	Hidden user	280	Julia	2025-03-11 19:05:35
2	Timothy Gaede	1319	Julia	2024-06-21 07:50:10

#	User	Length	Language	Date
1	Benjamin Ye	652	Kotlin	2024-01-07 07:58:26
2	Adam Rankin	658	Kotlin	2023-05-05 23:49:44
3	Vegard Itland	860	Kotlin	2019-01-29 00:29:08
4	Phường Lên	1050	Kotlin	2019-12-22 03:35:52
5	Sam Keyser	1124	Kotlin	2023-05-17 17:25:34
6	Jacob Huebner	1211	Kotlin	2022-03-30 22:40:53
7	Witte, Chet	1211	Kotlin	2022-04-05 19:36:10
8	Emil Wihlander	1414	Kotlin	2023-07-26 00:13:05
9	Hidden user	1659	Kotlin	2019-12-22 03:01:38
10	Michael Spear	1947	Kotlin	2020-11-21 19:54:15

#	User	Length	Language	Date
1	Ingemar Ragnemalm	807	Pascal	2019-12-05 18:47:40
2	Zach Ventimiglia	911	Pascal	2025-04-02 15:46:40

#	User	Length	Language	Date
1	Saito Ta	128	Perl	2024-04-09 02:28:53
2	Ahmad Barhamje	1532	Perl	2025-04-30 20:50:06

#	User	Length	Language	Date
1	Petr Trofimov	855	PHP	2021-05-01 12:54:04

#	User	Length	Language	Date
1	Thomas Feld	439	Python 2	2019-09-25 16:38:04
2	Lars Åström	570	Python 2	2018-11-01 10:37:04
3	Björn Magnusson	570	Python 2	2018-11-02 22:21:43
4	Andreas Björklund	577	Python 2	2019-11-30 11:14:37
5	Ciara Godwin	585	Python 2	2018-04-10 22:52:22
6	Johan Lyts	598	Python 2	2019-06-29 15:18:04
7	Måns Magnusson	685	Python 2	2018-11-04 21:52:42
8	Oskar Haarklou Veileborg	692	Python 2	2018-09-21 13:57:50
9	Maj Stenmark	777	Python 2	2019-09-09 20:28:36
10	Yanmarshus Bachtiar	806	Python 2	2020-10-27 01:22:13

#	User	Length	Language	Date
1	Kévin Dubrulle	289	Python 3	2024-04-06 15:23:42
2	Tommi Järvenpää	295	Python 3	2024-04-09 14:59:46
3	Charles Ancheta	309	Python 3	2023-04-07 20:42:30
4	Anshuman Dash	347	Python 3	2024-01-06 09:22:38
5	Ahmed Chamseddine	352	Python 3	2024-03-25 11:15:49
6	David Worley	364	Python 3	2024-04-06 20:48:02
7	Hidden user	393	Python 3	2022-11-19 05:28:54
8	Lawry Sorenson	396	Python 3	2023-10-20 04:00:40
9	Markus Mathiasen	398	Python 3	2023-02-08 17:09:13
10	Simen Sørensen	409	Python 3	2024-11-26 00:20:45

#	User	Length	Language	Date
1	Alexander Bilde Pedersen	318	Ruby	2023-05-05 17:54:12
2	Hidden user	419	Ruby	2019-10-01 21:13:53
3	Macdara mac an tSionnaigh	532	Ruby	2019-10-03 11:48:09
4	Eugen Neagoe	592	Ruby	2026-02-16 13:23:03
5	Michael Go	884	Ruby	2024-05-26 19:41:55
6	Matzuka	937	Ruby	2025-11-01 12:22:38

#	User	Length	Language	Date
1	David Rasch	1025	Rust	2021-02-26 17:08:39
2	Vincent Lagerros	1291	Rust	2025-01-26 15:26:26
3	Artur Khuziakhmetov	1703	Rust	2022-07-13 17:55:42
4	Joe Blower	1820	Rust	2025-06-14 05:47:36
5	Andrew Lee	2252	Rust	2021-03-14 11:49:41
6	Eric Pinter	2792	Rust	2021-07-23 03:37:05
7	Aidan Taylor	2919	Rust	2021-03-20 02:18:09
8	Isak Jägberg	2988	Rust	2019-04-28 11:26:48
9	Alejandro Osornio	3212	Rust	2024-01-29 06:42:45
10	Bas Dirks	3344	Rust	2022-01-04 16:54:58

#	User	Length	Language	Date
1	Grettir Heimisson	4570	Zig	2025-11-03 16:26:05

Solution running time distribution