Problem A
Star Arrangements — Problem Statistics

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Submissions	6122
Accepted submissions	3175
Submission ratio	51.86%
Authors	2940
Full solves [?]	2806
Full solve Ratio	95.44%

#	User	Runtime	Language	Date
1	Danny Robinson	0.02 s	Bash	2024-08-28 22:13:23

#	User	Runtime	Language	Date
1	Pontus Eriksson	0.02 s	C#	2017-11-14 12:26:09
2	Johan Pettersson	0.02 s	C#	2017-11-17 06:11:29
3	Łukasz Organiściak	0.02 s	C#	2017-11-18 04:26:34
4	Franz Spitaler	0.02 s	C#	2017-11-22 15:34:19
5	Faisal Rahman	0.02 s	C#	2017-11-27 10:18:25
6	Ludwig Hedeby	0.02 s	C#	2017-11-29 13:26:20
7	Andreas Ljungberg	0.02 s	C#	2017-12-14 18:36:23
8	Ólafur Andri	0.02 s	C#	2018-01-30 11:32:53
9	Kunwei Zhang	0.02 s	C#	2018-02-04 10:00:18
10	Alex Telon	0.02 s	C#	2018-02-06 21:05:16

#	User	Runtime	Language	Date
1	John Dandy	0.01 s	Common Lisp	2020-01-31 02:49:45
2	David Cawthon	0.01 s	Common Lisp	2020-06-26 04:53:27
3	wibi	0.01 s	Common Lisp	2020-08-20 14:52:50
4	Hidden user	0.02 s	Common Lisp	2019-06-08 04:15:48

#	User	Runtime	Language	Date
1	Tim Mondorf	0.04 s	F#	2021-12-02 14:18:42
2	Jacob Harris Cryer Kragh	0.04 s	F#	2022-08-07 11:30:05

#	User	Runtime	Language	Date
1	n k	0.00 s	Go	2025-01-14 20:29:32
2	Neal McCarthy	0.02 s	Go	2018-10-23 18:12:20
3	Ross O'Sullivan	0.07 s	Go	2018-08-17 21:27:59
4	Krzysztof Gibuła	0.07 s	Go	2019-01-19 12:19:17
5	Thomas Mailund	0.08 s	Go	2020-11-19 04:59:17
6	Norbert Voelker	0.08 s	Go	2021-04-12 00:57:42
7	Wojtek Bednarzak	0.68 s	Go	2018-04-30 15:51:42

#	User	Runtime	Language	Date
1	Brent Yorgey	0.00 s	Haskell	2017-11-13 05:21:06
2	Olle Eriksson	0.00 s	Haskell	2017-11-13 17:21:40
3	Hidden user	0.00 s	Haskell	2023-01-16 23:15:58
4	Brandon Tang	0.00 s	Haskell	2023-05-19 18:49:20
5	Steinar Simonnes	0.00 s	Haskell	2024-01-26 10:08:16
6	Esther Chong	0.01 s	Haskell	2017-11-17 06:19:17
7	Matthew Johnson	0.01 s	Haskell	2017-12-09 15:50:13
8	Alexis J S Payne	0.01 s	Haskell	2018-03-22 18:58:55
9	Per K. Dahl	0.01 s	Haskell	2018-04-18 14:05:28
10	Morten Lohne	0.01 s	Haskell	2018-04-18 16:21:09

#	User	Runtime	Language	Date
1	Liam Keliher	0.05 s	Java	2017-11-13 18:59:31
2	Aron Bergman	0.05 s	Java	2017-11-15 08:01:25
3	Nick Wu	0.05 s	Java	2017-11-15 20:29:03
4	Finn Lidbetter	0.05 s	Java	2017-11-17 04:46:12
5	Juan David Marín Cerón	0.05 s	Java	2017-12-02 03:23:22
6	Allan Stewart	0.05 s	Java	2017-12-15 07:45:44
7	Micah Stairs	0.05 s	Java	2017-12-23 20:48:33
8	David Hinschberger	0.05 s	Java	2018-01-08 11:09:59
9	Nigel Quinn	0.05 s	Java	2018-03-19 17:36:49
10	Martijn Muijsers	0.05 s	Java	2018-03-24 21:04:58

#	User	Runtime	Language	Date
1	Dalton Neely	0.06 s	JavaScript (Node.js)	2018-07-08 05:15:21
2	Carl Sundvall	0.06 s	JavaScript (Node.js)	2018-10-28 16:02:48
3	Gurpartap Singh Bhatti	0.06 s	JavaScript (Node.js)	2019-02-18 00:07:43
4	José Lucas	0.06 s	JavaScript (Node.js)	2019-03-11 19:21:22
5	Sanjiv Dinakar	0.06 s	JavaScript (Node.js)	2019-04-20 03:05:07
6	Hidden user	0.06 s	JavaScript (Node.js)	2019-06-06 18:56:49
7	Shakeel Samsudeen	0.42 s	JavaScript (Node.js)	2020-08-27 23:38:55
8	Taufik Hidayat	0.42 s	JavaScript (Node.js)	2020-10-09 13:25:08
9	Chris Wong	0.42 s	JavaScript (Node.js)	2021-01-31 23:05:53
10	Hadi Qovaizi	0.42 s	JavaScript (Node.js)	2021-02-18 19:20:09

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2017-11-14 21:57:55
2	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2017-11-21 00:21:25
3	Nicklas Utgaard	0.01 s	JavaScript (SpiderMonkey)	2017-11-22 17:30:43
4	Jānis Konutis	0.01 s	JavaScript (SpiderMonkey)	2017-12-13 15:51:18
5	Robin Livesey	0.01 s	JavaScript (SpiderMonkey)	2018-04-14 16:18:55
6	Jeremy Loh	0.03 s	JavaScript (SpiderMonkey)	2019-01-05 09:52:03
7	Bernard Perrin	0.03 s	JavaScript (SpiderMonkey)	2019-01-19 22:14:22
8	Peter Menyes	0.03 s	JavaScript (SpiderMonkey)	2020-12-27 19:19:30
9	Christian Pilegaard Cederquist	0.03 s	JavaScript (SpiderMonkey)	2023-01-09 23:24:36
10	Evan Magill	0.03 s	JavaScript (SpiderMonkey)	2024-04-25 17:51:45

#	User	Runtime	Language	Date
1	Timothy Gaede	0.40 s	Julia	2024-03-27 11:48:58
2	Danny Robinson	0.52 s	Julia	2024-08-28 22:02:45

#	User	Runtime	Language	Date
1	Stefan Kennedy	0.17 s	Kotlin	2017-12-04 20:25:40
2	Jacob Huebner	0.17 s	Kotlin	2020-06-02 03:56:40
3	Adam Rankin	0.17 s	Kotlin	2023-05-10 21:14:00
4	Dayan Ruben Gonzalez	0.18 s	Kotlin	2020-10-08 04:04:57
5	Sarek Høverstad Skotåm	0.18 s	Kotlin	2020-10-10 13:56:39
6	Albert Pala	0.18 s	Kotlin	2021-06-29 17:07:57
7	Neil Harmon	0.20 s	Kotlin	2019-04-02 14:25:40
8	Dmitry Shostak	0.21 s	Kotlin	2019-09-14 10:47:25
9	Hidden user	0.21 s	Kotlin	2020-03-21 23:54:25
10	Chris Johnson	0.24 s	Kotlin	2025-10-28 21:59:12

#	User	Runtime	Language	Date
1	Joseph Chau	0.00 s	Lua	2024-01-26 22:15:12
2	Caleb Austin	0.01 s	Lua	2024-08-30 23:49:14

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2018-08-10 15:10:55
2	David Connolly	0.00 s	Pascal	2022-04-20 18:11:34

#	User	Runtime	Language	Date
1	Hidden user	0.04 s	Perl	2024-10-10 13:14:15

#	User	Runtime	Language	Date
1	Susanne Ragnemalm	0.01 s	PHP	2018-03-11 18:23:13
2	Jeff Cashion	0.01 s	PHP	2018-04-27 14:46:05
3	Renate	0.01 s	PHP	2021-04-30 21:28:28
4	陳建宏	0.01 s	PHP	2021-05-30 15:27:19
5	Helbin Grégory	0.02 s	PHP	2020-02-02 13:37:45
6	Emil Riis Hansen	0.05 s	PHP	2018-10-26 15:04:34

#	User	Runtime	Language	Date
1	Godmar Back	0.03 s	Python 2	2017-11-12 21:21:37
2	Andrei Stoica	0.03 s	Python 2	2017-11-13 11:57:39
3	Çağdaş Öztekin	0.03 s	Python 2	2017-11-13 13:42:16
4	Joey Thomas	0.03 s	Python 2	2017-11-14 02:33:11
5	Hidden user	0.03 s	Python 2	2017-11-14 07:38:54
6	Christofer Ohlsson	0.03 s	Python 2	2017-11-14 19:55:13
7	Hidden user	0.03 s	Python 2	2017-11-15 12:02:54
8	Kasper Borys	0.03 s	Python 2	2017-11-15 23:53:51
9	Alexandria Davis	0.03 s	Python 2	2017-11-16 05:11:04
10	Isaac Lee	0.03 s	Python 2	2017-11-17 01:50:59

#	User	Runtime	Language	Date
1	Alexei Fedotov	0.02 s	Python 3	2017-11-13 13:05:08
2	Hidden user	0.02 s	Python 3	2017-11-16 02:44:51
3	Nathan Helgeson	0.02 s	Python 3	2017-11-16 21:40:35
4	Isaac Lee	0.02 s	Python 3	2017-11-17 01:49:51
5	Thomas Eadie	0.02 s	Python 3	2017-11-18 05:05:43
6	Cian Ruane	0.02 s	Python 3	2017-11-22 20:27:36
7	Dakota Owens	0.02 s	Python 3	2017-12-02 18:59:52
8	Keefe Johnson	0.02 s	Python 3	2017-12-04 12:55:48
9	Vahagn Altunyan	0.02 s	Python 3	2017-12-09 18:51:51
10	Richard Liu	0.02 s	Python 3	2017-12-11 21:25:08

#	User	Runtime	Language	Date
1	Jinwoo Lee	0.14 s	Racket	2025-02-07 03:29:51

#	User	Runtime	Language	Date
1	Mona Dadoun	0.04 s	Ruby	2017-12-29 00:57:30
2	Paul Vinell	0.04 s	Ruby	2018-03-01 19:31:38
3	Lim Ming Yean	0.05 s	Ruby	2018-11-15 07:30:32
4	Kellen Watt	0.05 s	Ruby	2018-11-18 06:36:43
5	Savvas Alexandrou	0.05 s	Ruby	2018-12-02 08:01:41
6	Hidden user	0.05 s	Ruby	2019-02-16 17:23:39
7	Victor Souza	0.05 s	Ruby	2019-05-03 21:17:16
8	Davi Guimarães Leite	0.05 s	Ruby	2019-05-03 21:17:38
9	Hidden user	0.05 s	Ruby	2020-03-26 14:57:00
10	Iqbal Farabi	0.06 s	Ruby	2020-09-17 16:17:32

#	User	Length	Language	Date
1	Danny Robinson	88	Bash	2024-08-28 22:13:23

#	User	Length	Language	Date
1	Martin Blom	148	C	2024-01-04 14:40:08
2	Hidden user	153	C	2018-09-11 00:56:58
3	Eduardo Núñez	195	C	2024-02-29 21:56:25
4	Aileen Zhu	250	C	2019-12-15 16:46:22
5	Muhammed Ali Aytürk	260	C	2020-03-08 15:00:48
6	Hidden user	268	C	2018-09-24 03:24:32
7	Hidden user	268	C	2018-09-25 20:40:58
8	Elaine Huang	271	C	2017-11-29 14:53:31
9	Mustapha Slimani	275	C	2020-04-26 18:42:06
10	Wesley Stephanak	290	C	2019-02-04 18:40:58

#	User	Length	Language	Date
1	Nathan Andrews	416	C#	2024-08-30 23:53:13
2	Pontus Eriksson	420	C#	2017-11-14 12:26:09
3	Kunwei Zhang	447	C#	2018-02-04 10:00:18
4	Fernanda Ferrer Ortega	450	C#	2023-03-23 01:40:17
5	Erika Molinder	457	C#	2019-04-09 15:17:39
6	Pavel Mardouski	461	C#	2021-01-08 06:49:09
7	Gretel Rojas	467	C#	2023-02-28 03:34:51
8	Santiago Sarabia Martínez	467	C#	2023-04-21 08:49:00
9	Diego Lara Ponce	468	C#	2023-05-31 01:47:40
10	Steve Jia	469	C#	2018-08-20 20:15:08

#	User	Length	Language	Date
1	Hakan Kjellerstrand	191	C++	2025-02-21 20:31:57
2	Đậu Huy Minh	207	C++	2022-11-04 17:32:15
3	Adhella S	221	C++	2019-01-01 18:33:19
4	Đoàn Công Chính	234	C++	2018-01-26 08:42:13
5	官毓韋	237	C++	2019-05-20 07:09:56
6	Way Tan	241	C++	2018-11-27 11:10:56
7	Neev Kataria	242	C++	2023-09-22 15:44:46
8	William Gan	245	C++	2017-12-13 14:52:04
9	Jacob Raymond	247	C++	2018-01-31 05:46:07
10	Cangnai Fang	254	C++	2020-10-05 09:32:35

#	User	Length	Language	Date
1	John Dandy	360	Common Lisp	2020-01-31 02:49:45
2	Hidden user	399	Common Lisp	2019-06-08 04:15:48
3	wibi	424	Common Lisp	2020-08-20 14:52:50
4	David Cawthon	760	Common Lisp	2020-06-26 04:53:27

#	User	Length	Language	Date
1	Tim Mondorf	448	F#	2021-12-02 14:18:42
2	Jacob Harris Cryer Kragh	693	F#	2022-08-07 11:30:05

#	User	Length	Language	Date
1	Thomas Mailund	291	Go	2020-11-19 04:59:17
2	Neal McCarthy	294	Go	2018-04-17 23:06:38
3	n k	360	Go	2025-01-14 20:29:32
4	Wojtek Bednarzak	414	Go	2018-04-30 15:51:42
5	Ross O'Sullivan	467	Go	2018-08-17 21:27:59
6	Krzysztof Gibuła	470	Go	2019-01-19 12:19:17
7	Norbert Voelker	670	Go	2021-04-12 00:57:42

#	User	Length	Language	Date
1	Birk Tjelmeland	215	Haskell	2018-08-22 16:40:38
2	Oisín Mac Fhearaí	253	Haskell	2021-01-07 23:25:42
3	Sebastian Banert	304	Haskell	2024-06-15 17:10:01
4	Morten Clausen	306	Haskell	2019-01-01 20:07:43
5	Øyvind Almli	315	Haskell	2021-01-08 16:18:35
6	Morten Lohne	372	Haskell	2018-04-18 16:21:09
7	Håkon Flatval	409	Haskell	2018-06-12 19:48:50
8	Hidden user	413	Haskell	2019-08-12 15:50:22
9	Steinar Simonnes	420	Haskell	2024-01-26 10:08:16
10	Alexis J S Payne	431	Haskell	2018-03-22 18:58:55

#	User	Length	Language	Date
1	Adam Abdalla	341	Java	2017-12-11 21:15:45
2	Matthew Zhang	343	Java	2017-12-11 22:32:07
3	Robert Slutsky	346	Java	2017-12-12 05:21:29
4	Natalie Longtin	348	Java	2017-12-25 02:54:58
5	Yihui Feng	365	Java	2018-10-27 19:12:54
6	Daniel Xie	377	Java	2017-12-11 21:18:38
7	Duncan Page	389	Java	2018-11-20 00:48:48
8	John Copley	391	Java	2017-11-14 19:09:41
9	Jason Tomkins	399	Java	2018-10-28 01:55:30
10	Jacob Baird	401	Java	2018-08-22 06:15:05

#	User	Length	Language	Date
1	Gurpartap Singh Bhatti	536	JavaScript (Node.js)	2019-02-18 00:07:43
2	Hajar Rashidi	556	JavaScript (Node.js)	2022-05-03 12:39:16
3	Shakeel Samsudeen	560	JavaScript (Node.js)	2020-08-27 23:38:55
4	Howard Tin Chi Chan	566	JavaScript (Node.js)	2021-03-29 00:11:18
5	Chris Wong	615	JavaScript (Node.js)	2021-01-31 23:05:53
6	José Lucas	648	JavaScript (Node.js)	2019-03-11 19:21:22
7	Dalton Neely	825	JavaScript (Node.js)	2018-07-08 05:15:21
8	Hidden user	926	JavaScript (Node.js)	2019-06-06 18:56:49
9	Sanjiv Dinakar	943	JavaScript (Node.js)	2019-04-20 03:05:07
10	Niamh Limerick	1086	JavaScript (Node.js)	2022-01-29 23:22:26

#	User	Length	Language	Date
1	Jimmy Gustafsson	124	JavaScript (SpiderMonkey)	2024-06-19 11:40:41
2	Peter Menyes	168	JavaScript (SpiderMonkey)	2020-12-27 19:43:24
3	Evan Magill	180	JavaScript (SpiderMonkey)	2024-04-25 17:51:45
4	Peter Kedemo	229	JavaScript (SpiderMonkey)	2017-11-21 00:21:25
5	Robin Livesey	258	JavaScript (SpiderMonkey)	2018-04-14 16:18:55
6	Bernard Perrin	311	JavaScript (SpiderMonkey)	2019-01-19 22:14:22
7	Christian Pilegaard Cederquist	358	JavaScript (SpiderMonkey)	2023-01-09 23:24:36
8	Jānis Konutis	376	JavaScript (SpiderMonkey)	2017-12-13 15:51:18
9	Bjørn Chr. Soltvedt	390	JavaScript (SpiderMonkey)	2017-11-14 21:57:55
10	Nicklas Utgaard	707	JavaScript (SpiderMonkey)	2017-11-22 17:30:43

#	User	Length	Language	Date
1	Danny Robinson	95	Julia	2024-08-28 22:02:45
2	Timothy Gaede	327	Julia	2024-03-27 11:48:58

#	User	Length	Language	Date
1	Chris Johnson	327	Kotlin	2025-10-28 21:59:12
2	Albert Pala	334	Kotlin	2021-06-29 17:07:57
3	Dmitry Shostak	343	Kotlin	2019-09-14 10:47:25
4	Sarek Høverstad Skotåm	392	Kotlin	2020-10-10 13:56:39
5	Stefan Kennedy	419	Kotlin	2017-12-04 20:25:40
6	Jacob Huebner	482	Kotlin	2020-06-02 03:56:40
7	Dayan Ruben Gonzalez	495	Kotlin	2020-10-08 04:04:57
8	Adam Rankin	520	Kotlin	2023-05-10 21:14:00
9	Hidden user	557	Kotlin	2020-03-21 23:54:25
10	Neil Harmon	669	Kotlin	2019-04-02 14:25:40

#	User	Length	Language	Date
1	Joseph Chau	260	Lua	2024-01-26 22:15:12
2	Caleb Austin	445	Lua	2024-08-30 23:49:14

#	User	Length	Language	Date
1	Ingemar Ragnemalm	405	Pascal	2018-08-10 15:10:55
2	David Connolly	486	Pascal	2022-04-20 18:11:34

#	User	Length	Language	Date
1	Hidden user	597	Perl	2024-10-10 13:14:15

#	User	Length	Language	Date
1	Renate	245	PHP	2021-04-30 21:28:28
2	Susanne Ragnemalm	441	PHP	2018-03-11 18:23:13
3	Emil Riis Hansen	612	PHP	2018-10-26 15:02:42
4	Helbin Grégory	682	PHP	2020-02-02 13:37:45
5	Jeff Cashion	765	PHP	2018-04-27 14:46:05
6	陳建宏	1502	PHP	2021-05-30 15:27:19

#	User	Length	Language	Date
1	Thomas Feld	142	Python 2	2019-08-22 10:07:16
2	Andreas Björklund	185	Python 2	2021-03-23 16:32:55
3	Xiao Xin	194	Python 2	2018-10-27 19:11:54
4	Kasper Borys	200	Python 2	2017-11-15 23:53:51
5	Måns Magnusson	211	Python 2	2018-09-30 12:27:49
6	Maj Stenmark	211	Python 2	2018-09-30 15:39:46
7	Christofer Ohlsson	214	Python 2	2017-11-14 19:55:13
8	Justin Su	214	Python 2	2018-03-31 12:18:44
9	Sigurður Jens Albertsson	223	Python 2	2017-11-20 22:31:09
10	João Pedro Alvito	224	Python 2	2018-03-20 18:57:52

#	User	Length	Language	Date
1	June Hoop	100	Python 3	2024-02-22 00:39:04
2	Adam Levav	113	Python 3	2023-01-25 00:57:51
3	Benjamin Z White	119	Python 3	2023-04-21 22:50:56
4	Nguyên Khôi Đỗ	125	Python 3	2024-12-24 01:22:45
5	Charles Ancheta	126	Python 3	2023-03-25 21:02:44
6	William Chorkawy	129	Python 3	2023-03-22 23:58:50
7	Thibault Raffaillac	132	Python 3	2023-07-31 16:21:13
8	David Allemang	133	Python 3	2018-01-28 08:13:28
9	Lasse Letager Hansen	134	Python 3	2024-01-12 12:14:41
10	Wilbert Chu	140	Python 3	2024-11-15 22:38:12

#	User	Length	Language	Date
1	Jinwoo Lee	639	Racket	2025-02-07 03:29:51

#	User	Length	Language	Date
1	Thomas Feld	80	Ruby	2022-11-14 14:04:01
2	Russell Ng	94	Ruby	2025-05-23 04:38:17
3	Lim Ming Yean	173	Ruby	2018-11-15 07:30:32
4	Hidden user	180	Ruby	2019-02-16 17:23:39
5	Kellen Watt	196	Ruby	2018-11-18 06:36:43
6	Paul Vinell	209	Ruby	2018-03-01 19:31:38
7	Davi Guimarães Leite	252	Ruby	2019-06-27 19:23:21
8	Victor Souza	318	Ruby	2019-05-03 21:17:16
9	Savvas Alexandrou	327	Ruby	2018-12-02 08:01:41
10	Iqbal Farabi	389	Ruby	2020-09-17 16:17:32

#	User	Length	Language	Date
1	Vincent Lagerros	360	Rust	2025-02-07 15:10:47
2	Hidden user	389	Rust	2025-10-27 20:51:16
3	David Rasch	441	Rust	2019-09-04 15:36:06
4	Chaoyi Yin	447	Rust	2019-03-25 19:18:03
5	Kok Dith	461	Rust	2021-08-05 10:06:47
6	Pankajkumar Patro	482	Rust	2024-09-24 14:02:26
7	Hovig Manjikian	528	Rust	2020-01-12 01:27:13
8	Mattéo Ladrat	588	Rust	2021-01-22 23:04:16
9	Bas Dirks	592	Rust	2022-01-14 11:52:51
10	Rik Bauwens	668	Rust	2019-01-29 11:10:17

Solution running time distribution