Problem A
Boss Battle — Problem Statistics

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Submissions	10524
Accepted submissions	5351
Submission ratio	50.85%
Authors	5020
Full solves [?]	4640
Full solve Ratio	92.43%

#	User	Runtime	Language	Date
1	Thomas Feld	0.01 s	APL	2023-03-08 11:00:10
2	Johan Clarström	0.01 s	APL	2023-03-13 20:45:29
3	Simon Hellsten	0.01 s	APL	2023-07-02 12:21:45
4	Sam Keyser	0.01 s	APL	2023-07-30 15:50:40
5	Max NC	0.01 s	APL	2023-09-09 12:38:20
6	Mitchell Johnstone	0.01 s	APL	2023-09-12 15:02:43
7	Arvid Jonasson	0.02 s	APL	2025-07-09 05:47:38

#	User	Runtime	Language	Date
1	Isak Nyberg	0.00 s	Bash	2023-07-12 21:07:49
2	Chenzhang Hu	0.01 s	Bash	2023-09-06 04:18:02
3	Thomas Feld	0.01 s	Bash	2023-09-28 07:57:48
4	Sissy Chen	0.01 s	Bash	2024-10-08 22:34:17

#	User	Runtime	Language	Date
1	Faisal Rahman	0.02 s	C#	2018-05-18 09:33:55
2	Alexander Grace an	0.02 s	C#	2018-12-31 13:23:13
3	Thomas Norris	0.02 s	C#	2019-10-04 02:24:04
4	Jacob Linden	0.02 s	C#	2019-10-16 11:17:40
5	Tobias Arendt Laursen	0.02 s	C#	2020-02-06 09:12:49
6	Robert Warnestam	0.02 s	C#	2020-03-24 10:45:15
7	Viktor Ekblom	0.02 s	C#	2020-03-26 17:51:24
8	Hidden user	0.02 s	C#	2020-07-06 17:07:19
9	Vicky Irmawan	0.02 s	C#	2020-07-22 06:36:40
10	Simon M. Binyamin	0.02 s	C#	2020-08-10 08:23:21

#	User	Runtime	Language	Date
1	Brandon Mitchell	0.00 s	COBOL	2020-04-07 15:00:22
2	Samuel Jefferis	0.00 s	COBOL	2020-10-06 20:48:40

#	User	Runtime	Language	Date
1	David Cawthon	0.01 s	Common Lisp	2020-09-13 14:48:59
2	Hidden user	0.02 s	Common Lisp	2019-06-07 20:57:44

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.03 s	F#	2022-06-13 17:31:33

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Go	2024-10-01 04:57:31
2	Nathan Lee	0.00 s	Go	2025-10-01 22:04:40
3	Arne Philipeit	0.06 s	Go	2018-10-13 20:08:34
4	Theo Coyne Morgan	0.07 s	Go	2019-03-26 21:16:26
5	Vaughan Andrews	0.07 s	Go	2019-03-28 01:45:54
6	Thomas Mailund	0.07 s	Go	2020-12-08 04:19:21
7	Krzysztof Gibuła	0.08 s	Go	2021-03-20 21:49:34
8	Norbert Voelker	0.08 s	Go	2021-04-25 18:34:24

#	User	Runtime	Language	Date
1	Vashista Basava	0.04 s	Java	2024-08-17 13:09:59
2	Oskar Nilsson	0.04 s	Java	2024-09-10 17:22:48
3	CUX "INDIO" PRADA	0.04 s	Java	2024-12-30 13:25:00
4	Guangyi Zhou	0.04 s	Java	2025-02-05 09:56:12
5	leo wennberg	0.04 s	Java	2025-07-08 20:05:04
6	Cesar Gonzalez	0.04 s	Java	2025-10-05 17:11:36
7	Tarek	0.04 s	Java	2025-10-12 02:44:05
8	Nick Wu	0.05 s	Java	2017-11-26 10:31:39
9	Sumer Sao	0.05 s	Java	2017-11-26 15:29:48
10	Jasper van Merle	0.05 s	Java	2017-11-26 21:52:08

#	User	Runtime	Language	Date
1	Rizky Muliawan	0.04 s	JavaScript (Node.js)	2024-02-09 03:20:13
2	Paul Molina Plant	0.05 s	JavaScript (Node.js)	2018-08-22 02:11:42
3	Ram Basnet	0.05 s	JavaScript (Node.js)	2018-10-25 14:43:45
4	Gurpartap Singh Bhatti	0.05 s	JavaScript (Node.js)	2019-04-28 22:10:49
5	Ludvig Dahlberg	0.05 s	JavaScript (Node.js)	2025-07-16 11:28:36
6	luna lovegood	0.06 s	JavaScript (Node.js)	2019-01-21 02:36:49
7	John	0.09 s	JavaScript (Node.js)	2022-08-18 23:10:54
8	Philippe Haavik	0.09 s	JavaScript (Node.js)	2022-11-10 10:29:58
9	Mohammed Al-sabaawi	0.09 s	JavaScript (Node.js)	2023-03-03 22:35:54
10	Peter Kedemo	0.42 s	JavaScript (Node.js)	2020-01-14 12:13:06

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2017-11-26 18:45:33
2	Jānis Konutis	0.01 s	JavaScript (SpiderMonkey)	2017-12-13 17:42:33
3	Peter Menyes	0.02 s	JavaScript (SpiderMonkey)	2021-08-30 20:04:07
4	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2022-06-29 19:30:48
5	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-01-12 23:33:40

#	User	Runtime	Language	Date
1	Timothy Gaede	0.50 s	Julia	2024-04-26 03:02:22

#	User	Runtime	Language	Date
1	Sam Keyser	0.11 s	Kotlin	2022-05-15 23:14:04
2	Слава Гуляев	0.12 s	Kotlin	2017-11-26 10:43:20
3	Roy Liu	0.16 s	Kotlin	2023-06-30 11:17:06
4	Viktor Andersson	0.16 s	Kotlin	2023-07-07 22:43:30
5	Eric Sjöström	0.16 s	Kotlin	2023-08-03 11:46:36
6	Adam Koprowski	0.17 s	Kotlin	2020-09-16 08:29:57
7	Nicholas Johnson	0.17 s	Kotlin	2021-04-19 00:01:16
8	Hidden user	0.17 s	Kotlin	2021-07-19 04:40:38
9	Johnny Baloney	0.17 s	Kotlin	2021-09-26 17:31:35
10	Bradley Richards	0.17 s	Kotlin	2023-03-07 16:52:28

#	User	Runtime	Language	Date
1	Zeheng Li	0.00 s	Lua	2023-12-04 21:36:17
2	Caleb Austin	0.00 s	Lua	2024-10-11 20:25:20
3	Shinji Koshida	0.00 s	Lua	2025-04-04 08:36:41

#	User	Runtime	Language	Date
1	selyann berrada	0.00 s	OCaml	2024-10-02 19:14:46
2	Hidden user	0.00 s	OCaml	2025-03-25 10:58:43

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2018-03-19 21:05:42
2	Magnus Ragnemalm	0.00 s	Pascal	2018-08-16 18:01:36

#	User	Runtime	Language	Date
1	Renate	0.01 s	PHP	2022-08-14 01:25:09
2	Thomas Feld	0.01 s	PHP	2023-01-31 12:49:34

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.01 s	Prolog	2019-04-29 09:56:45

#	User	Runtime	Language	Date
1	Henrik Gingsjö	0.02 s	Python 2	2017-11-26 11:22:02
2	Vaibhav Tulsyan	0.02 s	Python 2	2017-11-26 12:06:15
3	Christofer Ohlsson	0.02 s	Python 2	2017-11-26 13:33:33
4	Sigurður Jens Albertsson	0.02 s	Python 2	2017-11-26 17:29:21
5	Måns Magnusson	0.02 s	Python 2	2017-11-26 17:45:51
6	Oskar Haarklou Veileborg	0.02 s	Python 2	2017-11-26 17:51:15
7	Asger Hautop Drewsen	0.02 s	Python 2	2017-11-26 18:05:52
8	Eoin Davey	0.02 s	Python 2	2017-11-27 00:35:28
9	Olav Røthe Bakken	0.02 s	Python 2	2017-11-28 11:40:04
10	Erik Tjøswold	0.02 s	Python 2	2017-11-28 13:40:41

#	User	Runtime	Language	Date
1	Björn Magnusson	0.02 s	Python 3	2017-11-26 10:33:53
2	Konstantin Pervunin	0.02 s	Python 3	2017-11-26 10:36:52
3	Marcus Dicander	0.02 s	Python 3	2017-11-26 10:43:51
4	Lorian Coltof	0.02 s	Python 3	2017-11-26 12:25:19
5	Stefan Kennedy	0.02 s	Python 3	2017-11-26 12:58:16
6	Casper Freksen	0.02 s	Python 3	2017-11-26 13:39:36
7	Rick Wouters	0.02 s	Python 3	2017-11-26 15:11:41
8	Arnar Bjarni Arnarson	0.02 s	Python 3	2017-11-26 15:47:29
9	Lars Åström	0.02 s	Python 3	2017-11-26 17:47:51
10	Atli Fannar Franklín	0.02 s	Python 3	2017-11-26 20:32:31

#	User	Runtime	Language	Date
1	Hidden user	0.04 s	Ruby	2019-03-05 14:53:16
2	Hidden user	0.04 s	Ruby	2019-03-29 20:10:37
3	Davi Guimarães Leite	0.05 s	Ruby	2019-03-29 20:10:57
4	Hidden user	0.05 s	Ruby	2021-07-04 18:23:17
5	Kok Dith	0.05 s	Ruby	2021-08-18 09:24:19
6	Yusuke Ichiki	0.05 s	Ruby	2022-04-15 09:23:57
7	Rikuto Sueta	0.05 s	Ruby	2022-04-18 18:37:07
8	Frederik Spang	0.05 s	Ruby	2022-09-30 16:57:20
9	Frederik Petersen	0.05 s	Ruby	2022-10-04 16:54:59
10	Thomas Feld	0.06 s	Ruby	2022-11-28 11:03:43

#	User	Length	Language	Date
1	Thomas Feld	15	APL	2023-03-08 11:00:10
2	Johan Clarström	15	APL	2023-03-13 20:46:31
3	Simon Hellsten	15	APL	2023-07-02 12:27:06
4	Sam Keyser	15	APL	2023-07-30 15:53:02
5	Max NC	15	APL	2023-09-09 12:38:20
6	Mitchell Johnstone	15	APL	2023-09-12 15:02:43
7	Arvid Jonasson	15	APL	2025-07-09 05:47:38

#	User	Length	Language	Date
1	Chenzhang Hu	22	Bash	2025-09-12 12:04:38
2	Isak Nyberg	24	Bash	2023-07-12 21:07:49
3	Sissy Chen	27	Bash	2024-10-08 22:34:17
4	Thomas Feld	28	Bash	2023-09-28 07:57:48

#	User	Length	Language	Date
1	Toon Van Eyck	74	C	2025-08-22 21:14:37
2	Boris Vanhoof	75	C	2025-04-08 05:27:54
3	Aquafina water bottle	108	C	2018-10-19 21:13:39
4	Sergey Jakobsen	108	C	2020-12-30 19:41:51
5	Yang Chenglong	111	C	2019-01-02 03:30:23
6	Elias Murcray	114	C	2024-10-07 21:17:20
7	Christopher Henry Bohn	116	C	2018-10-15 06:35:00
8	E Hsiao	116	C	2019-03-04 08:30:05
9	Mikael K Eriksson	119	C	2021-03-12 18:47:12
10	Ivandy Ricardo Hutajulu	124	C	2019-12-23 09:11:21

#	User	Length	Language	Date
1	Nathan Andrews	119	C#	2024-10-11 20:12:31
2	Hidden user	216	C#	2020-07-06 17:07:19
3	Göran Andersson	241	C#	2022-05-13 23:03:39
4	Harley Lafeber	258	C#	2020-09-02 10:23:00
5	Mikael Fiala-Lundström	262	C#	2021-05-02 18:37:10
6	Vicky Irmawan	269	C#	2020-07-22 06:36:40
7	Գոռ Բաղդասարյան	281	C#	2025-02-21 05:55:20
8	Sebastian Sternberg	307	C#	2021-02-10 18:45:27
9	Yevgeniy Sheyer	329	C#	2025-03-14 02:00:50
10	Hidden user	332	C#	2021-02-01 10:00:42

#	User	Length	Language	Date
1	Ralf Merhof	74	C++	2024-04-10 14:07:22
2	Tyler Fernando	76	C++	2022-11-01 03:18:22
3	Kai10	91	C++	2025-06-12 20:22:36
4	Hidden user	94	C++	2020-03-04 22:15:40
5	soutinho	95	C++	2022-04-21 01:50:12
6	André Luiz Góis Queiroz	97	C++	2025-07-04 20:50:47
7	Mikołaj Stępiński	102	C++	2020-12-11 14:21:33
8	Đậu Huy Minh	102	C++	2023-09-21 15:15:22
9	Hidden user	103	C++	2023-03-24 17:38:41
10	Anna Roczek	103	C++	2023-07-04 22:48:01

#	User	Length	Language	Date
1	Brandon Mitchell	414	COBOL	2020-04-07 15:00:22
2	Samuel Jefferis	824	COBOL	2020-10-06 20:48:40

#	User	Length	Language	Date
1	Hidden user	40	Common Lisp	2019-06-07 20:57:44
2	David Cawthon	537	Common Lisp	2020-09-13 14:48:59

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	102	F#	2022-06-13 17:31:33

#	User	Length	Language	Date
1	Thomas Mailund	133	Go	2020-12-08 04:19:21
2	Vaughan Andrews	139	Go	2019-03-28 01:45:54
3	Arne Philipeit	141	Go	2018-10-13 20:08:34
4	Hidden user	143	Go	2024-10-01 04:57:31
5	Theo Coyne Morgan	157	Go	2019-03-26 21:16:26
6	Nathan Lee	258	Go	2025-10-01 22:04:40
7	Krzysztof Gibuła	291	Go	2021-03-20 21:49:34
8	Norbert Voelker	517	Go	2021-04-25 18:34:24

#	User	Length	Language	Date
1	Daniel Brännvall	33	Haskell	2023-06-29 14:56:24
2	Dan Greco	37	Haskell	2025-10-01 18:15:51
3	Rudy Matela	41	Haskell	2024-11-14 17:17:18
4	Joakim Blikstad	51	Haskell	2018-02-14 02:16:14
5	Rudi Svartveit	51	Haskell	2019-09-25 16:49:23
6	Sebastian Banert	51	Haskell	2023-10-05 18:56:32
7	Birk Tjelmeland	52	Haskell	2017-12-04 20:19:53
8	Steinar Simonnes	52	Haskell	2023-02-15 21:46:13
9	Nicholas Marsh	63	Haskell	2022-09-19 14:20:24
10	Hidden user	76	Haskell	2022-11-22 10:42:28

#	User	Length	Language	Date
1	Jason Portillo	173	Java	2018-01-27 18:23:50
2	Tom Bousso	188	Java	2017-12-06 21:14:21
3	Derek Goodwin	189	Java	2018-01-27 18:25:04
4	Chen Shenghao	189	Java	2019-01-28 11:00:57
5	Timothy Buzzelli	193	Java	2018-01-27 18:12:05
6	William Brigham	196	Java	2018-01-27 18:13:08
7	Matthew Garrison	203	Java	2018-01-27 18:13:47
8	Ryan Looney	203	Java	2018-09-30 04:42:08
9	Dylan Smith	209	Java	2021-07-02 00:14:47
10	Matthew Lutze	210	Java	2018-02-17 01:43:29

#	User	Length	Language	Date
1	Peter Kedemo	211	JavaScript (Node.js)	2020-01-14 12:13:06
2	Gurpartap Singh Bhatti	229	JavaScript (Node.js)	2019-04-28 22:10:49
3	Kai Joon Leong	247	JavaScript (Node.js)	2022-04-19 10:10:20
4	Muhd Hifzur Rahman	260	JavaScript (Node.js)	2022-04-19 13:04:23
5	Desmond Cheng Wen Jie	260	JavaScript (Node.js)	2022-04-22 10:15:23
6	Clarence Loh	275	JavaScript (Node.js)	2022-04-24 07:11:56
7	Lee Xuan Rong	278	JavaScript (Node.js)	2022-04-19 14:16:27
8	Hidden user	278	JavaScript (Node.js)	2022-04-20 13:36:43
9	Jeremiah Ang	281	JavaScript (Node.js)	2022-03-22 07:43:46
10	Neo Yu Hong	282	JavaScript (Node.js)	2022-04-18 04:06:19

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	30	JavaScript (SpiderMonkey)	2023-01-12 23:33:40
2	Bjørn Chr. Soltvedt	49	JavaScript (SpiderMonkey)	2017-11-26 18:45:33
3	Jānis Konutis	178	JavaScript (SpiderMonkey)	2017-12-13 17:44:28
4	Peter Menyes	259	JavaScript (SpiderMonkey)	2021-08-30 20:04:07
5	Jimmy Gustafsson	343	JavaScript (SpiderMonkey)	2022-06-29 19:30:48

#	User	Length	Language	Date
1	Timothy Gaede	137	Julia	2024-04-26 03:02:22

#	User	Length	Language	Date
1	Hidden user	68	Kotlin	2025-08-19 09:32:35
2	Eric Sjöström	87	Kotlin	2023-08-03 11:46:36
3	Ivo Heberle	87	Kotlin	2023-08-21 13:45:09
4	Troy Warmboe	106	Kotlin	2020-02-12 01:26:12
5	Emil Göransson	120	Kotlin	2023-07-03 12:07:56
6	Nicholas Johnson	127	Kotlin	2022-05-15 15:32:34
7	Bradley Richards	129	Kotlin	2024-02-22 11:40:42
8	Sam Keyser	131	Kotlin	2022-05-15 23:14:04
9	Noru	133	Kotlin	2024-04-09 08:27:26
10	Emil Wihlander	136	Kotlin	2023-07-28 14:27:26

#	User	Length	Language	Date
1	Zeheng Li	72	Lua	2023-12-12 23:18:29
2	Shinji Koshida	90	Lua	2025-04-04 08:36:41
3	Caleb Austin	546	Lua	2024-10-11 20:25:20

#	User	Length	Language	Date
1	Hidden user	48	OCaml	2025-03-25 10:58:43
2	selyann berrada	92	OCaml	2024-10-04 23:50:46

#	User	Length	Language	Date
1	Magnus Ragnemalm	107	Pascal	2018-08-16 18:01:36
2	Ingemar Ragnemalm	120	Pascal	2018-03-19 21:05:42

#	User	Length	Language	Date
1	Thomas Feld	17	PHP	2023-01-31 12:49:34
2	Renate	78	PHP	2022-08-14 01:25:09

#	User	Length	Language	Date
1	Andriy Zyevakov	132	Prolog	2019-04-29 09:56:45

#	User	Length	Language	Date
1	Sigurður Jens Albertsson	22	Python 2	2017-11-26 17:29:21
2	Asger Hautop Drewsen	22	Python 2	2017-11-26 18:05:52
3	Peter Beattie	22	Python 2	2017-11-29 21:54:13
4	Simon Hellsten	22	Python 2	2023-07-02 12:38:31
5	Måns Magnusson	23	Python 2	2017-11-26 17:45:51
6	Eoin Davey	23	Python 2	2017-11-27 00:35:28
7	Garðar Sigurðsson	23	Python 2	2017-12-22 12:28:02
8	Oskar Haarklou Veileborg	25	Python 2	2017-11-26 17:51:15
9	Аlon Djurinsky	25	Python 2	2018-10-21 16:24:55
10	Guan Yang Ze	25	Python 2	2019-08-26 03:31:53

#	User	Length	Language	Date
1	Arnar Bjarni Arnarson	28	Python 3	2017-11-26 15:47:29
2	Lars Åström	28	Python 3	2017-11-26 17:47:51
3	Hidden user	28	Python 3	2018-02-21 20:35:41
4	Jordan Koelbl	28	Python 3	2018-03-03 07:20:54
5	Arthur Tseng	28	Python 3	2018-08-02 05:32:45
6	Chinmay Viraj Raut	28	Python 3	2018-10-16 11:37:33
7	Zachariah Goldthorpe	28	Python 3	2018-10-19 21:06:34
8	Hidden user	28	Python 3	2019-02-12 12:06:21
9	Hans Tananda	28	Python 3	2019-07-10 09:15:10
10	Biruk Alamirew	28	Python 3	2019-11-22 07:07:54

#	User	Length	Language	Date
1	Hidden user	21	Ruby	2021-07-04 18:23:17
2	Frederik Spang	21	Ruby	2022-09-30 16:57:20
3	Frederik Petersen	21	Ruby	2022-10-04 16:54:59
4	Thomas Feld	21	Ruby	2022-11-28 11:03:43
5	Julian Nohr	21	Ruby	2023-01-05 21:39:16
6	Gustav Elmqvist	21	Ruby	2023-03-05 20:43:11
7	Simon Hellsten	21	Ruby	2023-07-02 12:34:19
8	Russell Ng	21	Ruby	2025-05-27 17:21:57
9	Hidden user	27	Ruby	2019-03-05 14:53:16
10	Yusuke Ichiki	27	Ruby	2022-04-15 09:23:57

#	User	Length	Language	Date
1	David Aldenbro	107	Rust	2023-10-26 11:50:28
2	Louis Bouchard	202	Rust	2024-10-04 03:27:05
3	David Rasch	206	Rust	2023-10-02 11:48:04
4	Hidden user	218	Rust	2023-07-03 09:29:00
5	Bas Dirks	222	Rust	2022-01-05 04:06:21
6	Ryan Mueller	230	Rust	2023-10-11 12:34:49
7	Joe Blower	251	Rust	2025-06-18 14:18:18
8	Columbus	272	Rust	2022-06-28 08:43:45
9	Marcus Persson	272	Rust	2025-07-31 11:04:03
10	Paul Nutini	275	Rust	2023-09-12 04:27:27

Solution running time distribution