Problem A
Sky Islands — Problem Statistics

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Submissions	5466
Accepted submissions	2169
Submission ratio	39.68%
Authors	1319
Full solves [?]	1213
Full solve Ratio	91.96%

#	User	Runtime	Language	Date
1	Guangyi Zhou	0.02 s	C	2025-01-18 10:37:12
2	Jesus Sanchez	0.14 s	C	2023-09-19 16:57:18
3	Caleb Sanciangco	0.14 s	C	2023-09-27 21:13:37
4	ryan morehouse	0.14 s	C	2023-09-28 14:31:42
5	Aridsondez Jerome	0.14 s	C	2023-09-29 14:38:14
6	Angel Hernandez	0.14 s	C	2023-09-30 23:46:05
7	Alexander Odom	0.14 s	C	2023-10-02 20:08:43
8	shiming Li	0.14 s	C	2023-10-02 21:11:27
9	Tommy Lavadinho	0.14 s	C	2023-10-03 01:52:36
10	Ryan Toole	0.14 s	C	2023-10-03 18:33:49

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.22 s	C#	2022-12-09 17:25:24
2	Anthony Ye	0.28 s	C#	2023-04-16 16:20:56
3	traxex	0.32 s	C#	2024-05-06 16:27:29
4	Nabeel Mirza	0.40 s	C#	2023-12-24 10:08:08
5	Artemy Gavrilov	0.42 s	C#	2024-03-23 23:02:32
6	Imran Rauf	0.49 s	C#	2024-04-03 09:18:41
7	Umar Rasyid	0.61 s	C#	2025-06-19 23:22:07
8	Esty Crow	1.04 s	C#	2023-04-13 02:54:15
9	Rickard Bemm	1.25 s	C#	2022-09-02 23:35:40
10	Yuwono Bangun Nagoro	4.75 s	C#	2022-08-26 17:17:25

#	User	Runtime	Language	Date
1	Frank Endriss	0.02 s	C++	2022-05-29 07:16:47
2	Jonathan Hallström	0.02 s	C++	2022-11-23 09:31:42
3	Alexander Kravberg	0.02 s	C++	2022-12-17 23:39:10
4	Hidden user	0.03 s	C++	2022-08-14 22:40:52
5	Henry Xia	0.03 s	C++	2022-09-02 17:48:01
6	Hidden user	0.03 s	C++	2022-11-22 20:19:31
7	Chong Yong Rui	0.05 s	C++	2022-10-23 07:05:33
8	Hidden user	0.05 s	C++	2024-12-07 09:11:18
9	Patrick Huang	0.12 s	C++	2021-05-22 18:47:49
10	Nicholas Foo Chuan Le	0.12 s	C++	2022-05-30 03:48:18

#	User	Runtime	Language	Date
1	Michal Žáček	1.20 s	Common Lisp	2022-08-11 21:25:34

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	1.24 s	F#	2022-11-22 16:28:57

#	User	Runtime	Language	Date
1	Norbert Voelker	0.28 s	Go	2022-06-01 15:37:08
2	Yitian Wang	1.25 s	Go	2023-03-16 02:45:47

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.46 s	Haskell	2024-02-09 14:38:22

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.12 s	Java	2022-06-03 20:25:38
2	Ryan Tan	0.13 s	Java	2022-11-24 07:34:56
3	Hidden user	0.13 s	Java	2025-06-06 13:54:23
4	Crystal Sharpe	0.18 s	Java	2022-06-20 22:18:50
5	Ng Jian An	0.23 s	Java	2024-10-23 10:07:50
6	Liam Keliher	0.26 s	Java	2022-06-15 23:06:47
7	Matheus Monteiro	0.48 s	Java	2023-06-04 12:57:24
8	Brent Yorgey	0.50 s	Java	2022-06-10 21:03:16
9	Bjørn Dons	0.52 s	Java	2022-05-29 19:13:42
10	Ranjith M	0.52 s	Java	2023-12-10 21:28:45

#	User	Runtime	Language	Date
1	Thiago Felipe Bastos da Silva	3.03 s	JavaScript (Node.js)	2023-05-24 19:06:28

#	User	Runtime	Language	Date
1	Jimmy Gustafsson	0.48 s	JavaScript (SpiderMonkey)	2024-08-03 13:13:12
2	Christian Pilegaard Cederquist	0.58 s	JavaScript (SpiderMonkey)	2023-01-27 13:39:26
3	Zach Tschetter	0.82 s	JavaScript (SpiderMonkey)	2023-04-15 21:28:57
4	Bjørn Chr. Soltvedt	1.82 s	JavaScript (SpiderMonkey)	2022-05-29 21:14:23

#	User	Runtime	Language	Date
1	Timothy Gaede	1.35 s	Julia	2024-05-19 02:08:08

#	User	Runtime	Language	Date
1	Martijn Muijsers	0.99 s	Kotlin	2024-06-02 18:16:10
2	Adam Rankin	1.09 s	Kotlin	2023-05-09 04:10:17

#	User	Runtime	Language	Date
1	Hidden user	0.31 s	OCaml	2025-06-22 06:05:04
2	luna	1.37 s	OCaml	2024-04-08 17:47:39
3	Artemis Ngoh	1.89 s	OCaml	2024-04-14 10:38:08

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.62 s	Pascal	2022-06-02 09:56:30

#	User	Runtime	Language	Date
1	Hakan Kjellerstrand	5.10 s	Prolog	2023-03-04 20:34:52

#	User	Runtime	Language	Date
1	Yanmarshus Bachtiar	1.83 s	Python 2	2023-07-27 04:44:48
2	Sideny Lin	2.13 s	Python 2	2021-05-22 18:57:42

#	User	Runtime	Language	Date
1	Hugo Morvan	0.05 s	Python 3	2023-04-19 22:41:43
2	jt	0.21 s	Python 3	2025-03-26 20:16:18
3	Petr	0.24 s	Python 3	2024-11-01 18:22:34
4	Daniel Herrera	0.24 s	Python 3	2025-11-06 08:53:19
5	Victor Song	0.26 s	Python 3	2022-06-06 14:30:28
6	Ryan Tan	0.29 s	Python 3	2022-09-01 15:22:39
7	Dominic Berzin Chua Way Gin	0.29 s	Python 3	2025-04-16 16:10:45
8	Daryll Ko	0.30 s	Python 3	2022-08-02 08:56:09
9	ro011110ot	0.32 s	Python 3	2025-09-03 14:51:17
10	Lai Zhuoyuan	0.33 s	Python 3	2023-04-02 07:11:19

#	User	Runtime	Language	Date
1	Miorel Palii	1.29 s	Ruby	2023-01-07 06:29:27

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.01 s	Rust	2025-06-02 00:10:34
2	Jonathan Choi	0.07 s	Rust	2024-03-22 10:20:10
3	Egor Kulikov	0.07 s	Rust	2025-02-09 10:57:22
4	Isak Jägberg	0.11 s	Rust	2023-03-15 19:05:48
5	Freek van Keulen	0.13 s	Rust	2022-11-28 05:28:46
6	Ng Tek In	0.19 s	Rust	2022-08-24 15:59:35
7	Bas Dirks	0.24 s	Rust	2022-05-31 17:11:05
8	Aaron Lengyel	0.31 s	Rust	2023-04-15 19:45:35

#	User	Length	Language	Date
1	Gaelan McMillan	713	C	2022-12-03 02:07:47
2	Edward	733	C	2023-10-05 03:18:11
3	Sandy Giang	763	C	2023-10-04 18:44:21
4	Alexander Bilde Pedersen	775	C	2023-04-23 00:15:59
5	isabella b	776	C	2023-10-03 07:33:29
6	Thomas Evans	792	C	2024-05-26 23:39:06
7	Raz Sela	798	C	2023-10-04 21:34:43
8	Hade Abdelkader	805	C	2023-10-03 17:04:24
9	Alexander Odom	807	C	2023-10-02 20:08:43
10	Ashlyn Urias	809	C	2023-10-04 04:46:28

#	User	Length	Language	Date
1	traxex	702	C#	2024-05-06 16:27:29
2	Anthony Ye	930	C#	2023-04-16 16:20:56
3	Esty Crow	1046	C#	2023-04-13 02:54:15
4	Artemy Gavrilov	1183	C#	2024-03-23 23:02:32
5	Nabeel Mirza	1629	C#	2023-12-24 10:13:53
6	Imran Rauf	1995	C#	2024-04-03 09:18:41
7	Umar Rasyid	2038	C#	2025-06-19 23:22:07
8	Rickard Bemm	2178	C#	2022-09-02 23:35:40
9	Yuwono Bangun Nagoro	2195	C#	2022-08-26 17:17:25
10	Andriy Zyevakov	10114	C#	2022-12-09 17:25:24

#	User	Length	Language	Date
1	Marcus Oscarsson	445	C++	2022-09-29 22:30:12
2	Dmitry Lyubshin	463	C++	2023-03-28 09:41:41
3	Yeung Man Tsung	475	C++	2022-11-23 12:31:57
4	陳心誠	515	C++	2024-08-22 01:58:24
5	Mikael K Eriksson	529	C++	2022-06-07 11:52:18
6	Samuel Tan	537	C++	2022-12-06 16:55:47
7	Hidden user	541	C++	2023-07-20 06:41:19
8	I Lucian	542	C++	2023-07-14 12:37:47
9	Maharaj Mithu	557	C++	2023-12-27 11:05:51
10	Natasha Oprean	560	C++	2023-07-14 13:29:40

#	User	Length	Language	Date
1	Michal Žáček	614	Common Lisp	2022-08-11 21:25:34

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	1260	F#	2022-11-22 16:28:57

#	User	Length	Language	Date
1	Norbert Voelker	857	Go	2022-06-01 15:37:08
2	Yitian Wang	1476	Go	2023-03-16 02:45:47

#	User	Length	Language	Date
1	Steinar Simonnes	2306	Haskell	2024-02-09 14:38:22

#	User	Length	Language	Date
1	Crystal Sharpe	871	Java	2022-06-20 22:18:50
2	Aditya Bhagavatula	939	Java	2023-11-19 00:30:36
3	Doug Goodman	1024	Java	2022-07-18 17:22:46
4	Christopher Udeh	1050	Java	2023-04-16 08:35:10
5	Suhas T. Nagar	1117	Java	2022-06-01 20:29:12
6	Bowen Yang	1144	Java	2023-09-25 00:35:59
7	Markus Bao	1153	Java	2023-04-15 10:51:39
8	Karlos Amada	1192	Java	2023-04-12 01:34:05
9	Josh Henderson	1193	Java	2023-04-20 13:42:11
10	Tamonash Chakraborty	1199	Java	2021-05-22 17:43:15

#	User	Length	Language	Date
1	Thiago Felipe Bastos da Silva	899	JavaScript (Node.js)	2023-05-24 19:09:26

#	User	Length	Language	Date
1	Jimmy Gustafsson	321	JavaScript (SpiderMonkey)	2024-08-03 13:17:53
2	Zach Tschetter	452	JavaScript (SpiderMonkey)	2023-04-15 21:28:57
3	Christian Pilegaard Cederquist	521	JavaScript (SpiderMonkey)	2023-01-27 13:39:26
4	Bjørn Chr. Soltvedt	19376	JavaScript (SpiderMonkey)	2022-05-29 21:14:23

#	User	Length	Language	Date
1	Timothy Gaede	1323	Julia	2024-05-19 02:08:08

#	User	Length	Language	Date
1	Adam Rankin	981	Kotlin	2023-05-09 04:10:17
2	Martijn Muijsers	1074	Kotlin	2024-06-02 18:16:10

#	User	Length	Language	Date
1	Hidden user	1017	OCaml	2025-06-22 06:05:04
2	Artemis Ngoh	1705	OCaml	2024-04-14 10:38:08
3	luna	4138	OCaml	2024-04-08 17:47:39

#	User	Length	Language	Date
1	Ingemar Ragnemalm	1699	Pascal	2022-06-02 09:56:30

#	User	Length	Language	Date
1	Hakan Kjellerstrand	326	Prolog	2023-02-28 08:41:17

#	User	Length	Language	Date
1	Sideny Lin	897	Python 2	2021-05-22 18:57:42
2	Yanmarshus Bachtiar	1132	Python 2	2023-07-27 04:44:48

#	User	Length	Language	Date
1	Hidden user	220	Python 3	2022-11-19 22:27:44
2	Thomas Feld	223	Python 3	2022-08-26 10:35:56
3	Chen Ruoyi	236	Python 3	2022-11-16 04:54:32
4	Ahmed Chamseddine	253	Python 3	2024-08-09 13:46:19
5	Farzam Abrishami	282	Python 3	2024-01-20 15:48:20
6	Kelly Dance	299	Python 3	2023-11-13 23:18:30
7	Hidden user	300	Python 3	2023-06-28 21:54:55
8	Hugo Morvan	309	Python 3	2023-04-19 22:41:43
9	Magnus Eide-Fredriksen	328	Python 3	2023-04-24 10:01:04
10	Hu Yijie	352	Python 3	2022-11-16 10:40:16

#	User	Length	Language	Date
1	Miorel Palii	414	Ruby	2023-01-07 06:29:27

#	User	Length	Language	Date
1	Ng Tek In	1060	Rust	2022-08-24 15:59:35
2	Bas Dirks	1075	Rust	2022-05-31 17:11:05
3	Freek van Keulen	1870	Rust	2022-11-28 05:28:46
4	Isak Jägberg	2364	Rust	2023-03-15 19:05:48
5	Jonathan Choi	3777	Rust	2024-03-22 10:20:10
6	Aaron Lengyel	5079	Rust	2023-04-15 19:45:35
7	Vincent Lagerros	9550	Rust	2024-08-01 01:09:28
8	Egor Kulikov	26315	Rust	2025-02-09 10:57:22

Solution running time distribution