Problem A
Quick Brown Fox — Problem Statistics

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Submissions	19240
Accepted submissions	9624
Submission ratio	50.02%
Authors	8900
Full solves [?]	8312
Full solve Ratio	93.39%

#	User	Runtime	Language	Date
1	Arvid Jonasson	0.02 s	APL	2025-06-10 16:38:57

#	User	Runtime	Language	Date
1	Chenzhang Hu	0.08 s	Bash	2024-04-17 18:27:19

#	User	Runtime	Language	Date
1	Robert Low	0.01 s	C#	2016-07-16 12:34:55
2	Стас Иванов	0.01 s	C#	2016-10-26 18:57:15
3	Michael Gulliksen	0.01 s	C#	2017-01-21 09:38:36
4	Joe Amenta	0.01 s	C#	2017-05-27 04:14:27
5	Piotr Karpala	0.02 s	C#	2015-10-03 16:07:00
6	Hidden user	0.02 s	C#	2015-10-03 23:47:07
7	Marcin Dudek	0.02 s	C#	2015-10-04 21:15:54
8	Andriy Zyevakov	0.02 s	C#	2015-10-11 00:31:59
9	Deni Spasovski	0.02 s	C#	2015-10-12 00:28:43
10	Jens Mossig	0.02 s	C#	2015-10-22 07:42:46

#	User	Runtime	Language	Date
1	David Cawthon	0.02 s	Common Lisp	2019-04-13 00:18:24

#	User	Runtime	Language	Date
1	dick move	0.00 s	Crystal	2025-09-27 13:48:43

#	User	Runtime	Language	Date
1	CharsKun	0.01 s	Dart	2023-05-31 09:50:45

#	User	Runtime	Language	Date
1	Patrick Bahr	0.05 s	F#	2021-02-14 23:15:58
2	Jacob Harris Cryer Kragh	0.05 s	F#	2022-07-06 17:34:28

#	User	Runtime	Language	Date
1	Thomas	0.00 s	Go	2024-01-11 23:07:34
2	Matthias Doepmann	0.00 s	Go	2025-04-10 21:02:35
3	Joseph Winkie	0.00 s	Go	2025-10-07 06:59:03
4	Krzysztof Gibuła	0.01 s	Go	2019-03-09 14:46:43
5	Fikri Sundayana	0.01 s	Go	2019-07-12 17:19:06
6	Hidden user	0.02 s	Go	2018-09-06 07:10:49
7	Hidden user	0.02 s	Go	2019-10-03 17:34:36
8	Andi Baso Annas	0.02 s	Go	2020-09-06 08:45:02
9	Karl Bonde Torp	0.02 s	Go	2020-10-24 23:47:59
10	Péter Szakszon	0.02 s	Go	2021-12-22 09:55:03

#	User	Runtime	Language	Date
1	Bala Krishna	0.04 s	Java	2024-08-16 15:07:49
2	Guangyi Zhou	0.04 s	Java	2025-04-04 10:59:26
3	Kensen Shi	0.05 s	Java	2015-10-03 18:11:48
4	Joshua Alman	0.05 s	Java	2015-10-03 18:11:56
5	Huaiyu Wu	0.05 s	Java	2015-10-03 18:14:33
6	Petr Ryšavý	0.05 s	Java	2015-10-03 18:15:47
7	Hidden user	0.05 s	Java	2015-10-03 18:16:46
8	Mickey J Chao	0.05 s	Java	2015-10-03 18:25:19
9	Andy Rock	0.05 s	Java	2015-10-03 18:31:37
10	Nicolás Eduardo Peña Moreno	0.05 s	Java	2015-10-03 18:33:51

#	User	Runtime	Language	Date
1	Joseph Ngugi	0.05 s	JavaScript (Node.js)	2018-08-13 17:00:13
2	Carl Sundvall	0.05 s	JavaScript (Node.js)	2018-10-28 00:31:06
3	Jerry Hu	0.05 s	JavaScript (Node.js)	2019-01-24 23:42:05
4	Sander Hellesø	0.05 s	JavaScript (Node.js)	2019-04-16 00:59:05
5	Gurpartap Singh Bhatti	0.05 s	JavaScript (Node.js)	2019-05-24 08:52:51
6	Hidden user	0.05 s	JavaScript (Node.js)	2024-09-24 18:52:40
7	Chris Wong	0.41 s	JavaScript (Node.js)	2021-02-02 22:12:18
8	Emil Larsson	0.42 s	JavaScript (Node.js)	2020-06-22 22:49:26
9	John	0.42 s	JavaScript (Node.js)	2020-08-07 07:08:04
10	Andoko Chandra	0.42 s	JavaScript (Node.js)	2020-10-03 17:38:47

#	User	Runtime	Language	Date
1	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2015-12-18 20:40:25
2	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-01-16 13:39:58
3	Rofel Ganado	0.01 s	JavaScript (SpiderMonkey)	2016-01-27 05:35:07
4	Johannes Jensen	0.01 s	JavaScript (SpiderMonkey)	2016-03-31 19:26:57
5	Roel Ernens	0.01 s	JavaScript (SpiderMonkey)	2016-04-13 13:14:49
6	Hà Minh Ngọc	0.01 s	JavaScript (SpiderMonkey)	2016-07-26 13:53:25
7	Hidden user	0.01 s	JavaScript (SpiderMonkey)	2016-08-02 04:46:57
8	Michael Laszlo	0.01 s	JavaScript (SpiderMonkey)	2016-10-12 00:38:05
9	J M	0.01 s	JavaScript (SpiderMonkey)	2016-10-20 22:48:32
10	Tor Nordqvist	0.01 s	JavaScript (SpiderMonkey)	2016-10-26 23:52:25

#	User	Runtime	Language	Date
1	Danny Robinson	0.60 s	Julia	2023-06-21 12:25:44
2	Noszály Csaba	0.60 s	Julia	2025-02-25 22:08:37
3	Timothy Gaede	0.65 s	Julia	2024-03-24 05:38:41

#	User	Runtime	Language	Date
1	Albert Pala	0.12 s	Kotlin	2021-06-29 12:22:54
2	Thanh Le	0.13 s	Kotlin	2021-07-13 20:02:04
3	Johnny Baloney	0.13 s	Kotlin	2022-01-14 00:06:48
4	Jacob Huebner	0.14 s	Kotlin	2020-03-16 23:12:44
5	José Manuel Delgado Medina	0.17 s	Kotlin	2018-03-14 18:10:20
6	Gaurav Tyagi	0.17 s	Kotlin	2018-09-10 18:40:30
7	Björn Holm	0.17 s	Kotlin	2019-10-08 18:22:41
8	James WIlliams	0.17 s	Kotlin	2020-09-29 06:15:11
9	Dmitry Shostak	0.18 s	Kotlin	2018-06-13 15:07:19
10	Eric Sjöström	0.18 s	Kotlin	2023-06-07 03:04:01

#	User	Runtime	Language	Date
1	Trevor	0.00 s	Lua	2025-10-06 04:23:05

#	User	Runtime	Language	Date
1	Alfred Morgan	0.00 s	Nim	2024-09-25 09:08:03
2	Daniel Morgan	0.00 s	Nim	2025-03-10 04:51:48

#	User	Runtime	Language	Date
1	Gavin Gray	0.00 s	OCaml	2021-05-24 04:25:26

#	User	Runtime	Language	Date
1	David Connolly	0.00 s	Pascal	2017-08-18 17:58:57

#	User	Runtime	Language	Date
1	Frank Farkas	0.01 s	PHP	2016-01-20 10:08:07
2	Silvena Lam	0.01 s	PHP	2016-02-11 10:15:42
3	Ali Pandidan	0.01 s	PHP	2016-11-01 13:13:42
4	George Broadley	0.01 s	PHP	2017-02-26 20:38:00
5	Ibraheem Ghabash	0.01 s	PHP	2018-05-21 01:07:52
6	Jonas Lindenskov Nielsen	0.01 s	PHP	2019-10-08 12:12:46
7	Petr Trofimov	0.01 s	PHP	2021-04-21 12:04:09
8	Renate	0.01 s	PHP	2021-05-10 00:20:23

#	User	Runtime	Language	Date
1	Hadi Qovaizi	0.02 s	Prolog	2016-04-17 20:10:10
2	Hakan Kjellerstrand	0.02 s	Prolog	2023-02-11 10:12:22

#	User	Runtime	Language	Date
1	Snild Dolkow	0.02 s	Python 2	2015-10-04 08:16:07
2	Paige Vosmik	0.02 s	Python 2	2015-10-06 04:09:39
3	Ailo Aasen	0.02 s	Python 2	2015-10-09 01:01:06
4	Tore Norderud	0.02 s	Python 2	2015-10-31 18:00:44
5	Hidden user	0.02 s	Python 2	2015-12-03 15:31:03
6	Kim Bonifield	0.02 s	Python 2	2016-04-09 20:05:59
7	Matas Kairaitis	0.02 s	Python 2	2016-04-25 16:07:58
8	Hasan Ramezani	0.02 s	Python 2	2016-06-25 17:19:54
9	Gerard Fitzpatrick	0.02 s	Python 2	2016-07-07 15:51:25
10	Tucker Craig	0.02 s	Python 2	2016-10-19 05:07:26

#	User	Runtime	Language	Date
1	Jim Zhang	0.02 s	Python 3	2015-10-03 18:08:51
2	Jared Messer	0.02 s	Python 3	2015-10-03 18:11:15
3	Victor Zheng	0.02 s	Python 3	2015-10-03 18:21:00
4	Parker Garrison	0.02 s	Python 3	2015-10-03 18:21:46
5	Benjamin Case	0.02 s	Python 3	2015-10-03 18:24:00
6	Stephen Sidwell	0.02 s	Python 3	2015-10-03 18:25:35
7	Benjamin Kane	0.02 s	Python 3	2015-10-03 18:27:06
8	Charles Zinn	0.02 s	Python 3	2015-10-03 18:39:34
9	Steven Moreland	0.02 s	Python 3	2015-10-03 18:40:12
10	Shane Hall	0.02 s	Python 3	2015-10-03 18:46:32

#	User	Runtime	Language	Date
1	Jinwoo Lee	0.28 s	Racket	2025-02-01 06:15:07

#	User	Runtime	Language	Date
1	Casper Christensen	0.03 s	Ruby	2015-12-31 16:24:45
2	Roberto Sales	0.03 s	Ruby	2016-01-29 16:37:28
3	Chris Weston	0.03 s	Ruby	2016-02-18 19:12:19
4	Gerry Hall	0.03 s	Ruby	2016-03-27 05:31:19
5	Lasse Berglund	0.03 s	Ruby	2016-04-01 13:42:03
6	Kellen Watt	0.03 s	Ruby	2016-06-04 22:38:17
7	Gaurav Manchanda	0.03 s	Ruby	2016-06-14 11:39:33
8	Erik Rydbert	0.03 s	Ruby	2016-07-06 11:07:49
9	Hidden user	0.03 s	Ruby	2016-07-28 14:12:51
10	Sebastian Craig	0.03 s	Ruby	2016-10-20 06:18:09

#	User	Runtime	Language	Date
1	Joe Blower	0.00 s	Zig	2025-05-17 23:35:02

#	User	Length	Language	Date
1	Arvid Jonasson	83	APL	2025-06-10 17:43:17

#	User	Length	Language	Date
1	Chenzhang Hu	1658	Bash	2024-04-17 18:27:19

#	User	Length	Language	Date
1	Sawyer Frie	294	C	2023-11-30 21:06:05
2	Khawla Hbiech	526	C	2017-07-12 22:34:01
3	Matthew Weston	546	C	2022-01-08 01:32:08
4	Raymond Yang	560	C	2018-03-17 00:29:19
5	Nhật Anh Võ Nguyễn	574	C	2016-03-07 16:49:27
6	Stanley Wisely	576	C	2021-01-08 14:17:13
7	Allan Nouri	589	C	2025-10-25 11:20:55
8	Hidden user	597	C	2018-05-09 22:36:47
9	Charlie Bouthoorn	607	C	2019-04-29 18:54:46
10	Emil Wihlander	607	C	2020-11-27 01:38:41

#	User	Length	Language	Date
1	Marek Bina	632	C#	2019-02-15 10:29:29
2	Marius Løkketangen	638	C#	2017-01-19 09:16:30
3	Hugo Oskarsson	655	C#	2019-05-04 10:59:16
4	Robert Slutsky	656	C#	2017-06-22 22:03:58
5	Alireza Nasrollahzadeh	686	C#	2018-06-24 17:44:19
6	Göran Andersson	692	C#	2022-05-10 09:44:39
7	Ludvig Lindau	703	C#	2016-02-05 16:27:24
8	Robbe Decraemer	706	C#	2020-04-16 18:32:27
9	Esty Crow	722	C#	2022-11-21 20:21:57
10	Robert Low	737	C#	2016-07-16 12:34:55

#	User	Length	Language	Date
1	Frans Meulenbroeks	343	C++	2024-11-13 23:21:09
2	Modan Han	398	C++	2015-10-03 19:27:22
3	Nguyen Tran Huu Duc	424	C++	2022-01-29 16:23:07
4	Mugeon Kim	446	C++	2024-03-11 05:28:33
5	Mouad L Barani	452	C++	2017-08-11 23:12:54
6	Govind Venugopalan	456	C++	2017-01-09 07:25:22
7	Bryan Wong Wei Heng	463	C++	2020-03-25 06:49:22
8	Kenzie Leonaro	472	C++	2018-06-20 15:06:28
9	Roger Chen	472	C++	2021-08-10 21:52:37
10	Wen Li Looi	474	C++	2015-10-03 18:19:14

#	User	Length	Language	Date
1	David Cawthon	285	Common Lisp	2019-04-13 00:18:24

#	User	Length	Language	Date
1	dick move	209	Crystal	2025-09-27 13:48:43

#	User	Length	Language	Date
1	CharsKun	812	Dart	2023-05-31 09:50:45

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	592	F#	2022-07-06 17:34:28
2	Patrick Bahr	2120	F#	2021-02-14 23:15:58

#	User	Length	Language	Date
1	Hussein Al Abry	563	Go	2017-02-28 22:46:50
2	Krzysztof Gibuła	679	Go	2019-03-09 14:46:43
3	Ian Howell	680	Go	2016-06-07 04:27:58
4	Hidden user	757	Go	2018-04-17 15:29:09
5	Hidden user	761	Go	2021-03-19 21:55:50
6	Andi Baso Annas	792	Go	2020-09-06 08:45:02
7	Ciarán Ó hAoláin	803	Go	2017-11-27 12:18:03
8	Norbert Voelker	844	Go	2021-04-11 20:50:16
9	Joseph Winkie	926	Go	2025-10-07 06:59:03
10	Neal McCarthy	960	Go	2018-04-16 15:52:43

#	User	Length	Language	Date
1	Rudy Matela	137	Haskell	2024-04-26 16:08:10
2	BlackcapCoder	194	Haskell	2019-05-01 06:53:19
3	Hidden user	246	Haskell	2019-08-14 13:13:59
4	Sebastian Banert	261	Haskell	2023-10-23 14:36:07
5	Lars Tveito	279	Haskell	2016-01-06 00:25:44
6	Jahid Hasan Imon	288	Haskell	2020-09-16 02:10:48
7	Oisín Mac Fhearaí	290	Haskell	2021-01-21 01:19:06
8	Hidden user	293	Haskell	2016-07-23 07:03:32
9	Patrik Andersson	294	Haskell	2018-05-17 19:47:53
10	Øyvind Almli	308	Haskell	2022-03-12 14:51:34

#	User	Length	Language	Date
1	Spencer Compton	508	Java	2016-02-06 15:49:19
2	Justin Turner	524	Java	2018-03-06 19:52:13
3	Raymond Arrington	528	Java	2024-06-16 04:31:30
4	Harrison Weigel	529	Java	2015-10-03 18:55:52
5	Daniel West	538	Java	2017-12-06 17:07:00
6	Hidden user	540	Java	2019-12-10 06:07:26
7	Chandler Griscom	546	Java	2015-10-03 20:06:48
8	Syed AbuTalib	547	Java	2019-08-07 18:16:48
9	Hidden user	553	Java	2021-05-23 16:47:02
10	Tim Smith	564	Java	2016-11-03 18:55:14

#	User	Length	Language	Date
1	Stian Toften	523	JavaScript (Node.js)	2021-04-17 02:20:23
2	Joseph Ngugi	629	JavaScript (Node.js)	2018-08-13 17:00:13
3	Dennis Muthuri	677	JavaScript (Node.js)	2021-04-20 16:14:11
4	Emil Larsson	681	JavaScript (Node.js)	2020-06-22 22:49:26
5	Antoine Bauri	695	JavaScript (Node.js)	2021-02-19 22:12:11
6	Anton J Olsson	736	JavaScript (Node.js)	2020-11-11 07:15:18
7	Chris Wong	743	JavaScript (Node.js)	2021-02-02 22:12:18
8	Khin Nyunt	788	JavaScript (Node.js)	2021-11-28 14:13:55
9	Hovhannes Kantuni	820	JavaScript (Node.js)	2021-03-04 03:09:36
10	Sander Hellesø	949	JavaScript (Node.js)	2019-04-16 00:59:05

#	User	Length	Language	Date
1	Jimmy Gustafsson	298	JavaScript (SpiderMonkey)	2022-06-07 22:18:57
2	Peter Menyes	361	JavaScript (SpiderMonkey)	2017-08-27 10:04:41
3	Andrea Bianchessi	378	JavaScript (SpiderMonkey)	2019-10-02 22:07:32
4	Bjørn Chr. Soltvedt	380	JavaScript (SpiderMonkey)	2016-01-16 13:39:58
5	Øyvind Skaar	388	JavaScript (SpiderMonkey)	2017-01-18 18:20:32
6	Zachary DeStefano	391	JavaScript (SpiderMonkey)	2019-09-16 23:01:25
7	Jerry Zhu	394	JavaScript (SpiderMonkey)	2017-10-06 23:28:47
8	Steffen Stenersen	399	JavaScript (SpiderMonkey)	2017-01-18 19:11:30
9	Bernard Perrin	409	JavaScript (SpiderMonkey)	2019-06-05 23:43:13
10	J M	412	JavaScript (SpiderMonkey)	2016-10-20 22:48:32

#	User	Length	Language	Date
1	Danny Robinson	195	Julia	2023-06-21 12:25:44
2	Noszály Csaba	384	Julia	2025-02-25 22:08:37
3	Timothy Gaede	746	Julia	2024-03-24 05:38:41

#	User	Length	Language	Date
1	Mohsen Dehbashi	256	Kotlin	2019-10-27 15:55:44
2	Adam Koprowski	380	Kotlin	2020-09-07 23:37:58
3	Jonathan Soo	385	Kotlin	2019-06-21 08:40:06
4	Mohamadhassan Ebrahimi	398	Kotlin	2019-11-06 14:22:40
5	axl	402	Kotlin	2019-08-16 11:52:46
6	Andrew Kronser	438	Kotlin	2017-10-21 15:05:19
7	Chris Johnson	438	Kotlin	2023-09-18 23:06:31
8	Troy Warmboe	478	Kotlin	2020-02-10 20:35:44
9	Yang Tang	495	Kotlin	2023-07-18 11:13:33
10	Jackson Kubin	500	Kotlin	2021-11-02 22:29:32

#	User	Length	Language	Date
1	Trevor	787	Lua	2025-10-06 04:23:05

#	User	Length	Language	Date
1	Daniel Morgan	440	Nim	2025-03-10 04:51:48
2	Alfred Morgan	526	Nim	2024-09-25 09:08:03

#	User	Length	Language	Date
1	Gavin Gray	978	OCaml	2021-05-24 04:25:26

#	User	Length	Language	Date
1	David Connolly	774	Pascal	2017-08-18 17:58:57

#	User	Length	Language	Date
1	Ibraheem Ghabash	340	PHP	2018-05-21 01:07:52
2	Ali Pandidan	456	PHP	2016-11-01 13:13:42
3	Silvena Lam	567	PHP	2016-02-11 10:15:42
4	Frank Farkas	624	PHP	2016-01-20 10:08:07
5	Renate	670	PHP	2021-05-10 00:20:23
6	Petr Trofimov	672	PHP	2021-04-21 12:04:09
7	George Broadley	706	PHP	2017-02-26 20:38:00
8	Jonas Lindenskov Nielsen	749	PHP	2019-10-08 12:12:46

#	User	Length	Language	Date
1	Hakan Kjellerstrand	363	Prolog	2023-02-11 10:12:22
2	Hadi Qovaizi	3308	Prolog	2016-04-17 20:10:10

#	User	Length	Language	Date
1	Thomas Feld	138	Python 2	2019-08-19 10:20:02
2	Ted Ying	164	Python 2	2015-10-03 18:27:34
3	Andreas Eisele	202	Python 2	2018-10-13 15:22:23
4	Paweł Kordowski	227	Python 2	2015-11-28 12:37:24
5	David Wärn	241	Python 2	2015-11-19 14:12:27
6	Jesper Öqvist	245	Python 2	2018-10-21 11:15:17
7	Adriaan de Vries	246	Python 2	2017-08-03 00:52:56
8	Hidden user	250	Python 2	2015-10-03 18:33:07
9	Snild Dolkow	250	Python 2	2015-10-04 08:16:07
10	Hasan Ramezani	250	Python 2	2016-06-25 17:19:54

#	User	Length	Language	Date
1	Simon Hellsten	106	Python 3	2023-10-28 15:34:58
2	Kevin Gomez	107	Python 3	2023-09-14 15:39:32
3	Avery	112	Python 3	2025-07-30 22:27:35
4	Clement Oh	116	Python 3	2023-07-12 19:56:23
5	Gustav Elmqvist	122	Python 3	2023-02-12 17:26:09
6	Cameron Kauffman	122	Python 3	2024-09-20 05:38:21
7	Isaac Erdman	126	Python 3	2024-09-09 21:49:12
8	Isak Nyberg	130	Python 3	2023-06-07 18:32:36
9	Michael Laurila	136	Python 3	2023-06-07 02:53:19
10	Hidden user	142	Python 3	2025-09-19 16:56:53

#	User	Length	Language	Date
1	Jinwoo Lee	685	Racket	2025-02-01 06:15:07

#	User	Length	Language	Date
1	Thomas Feld	74	Ruby	2023-01-11 12:52:15
2	Gustav Elmqvist	89	Ruby	2023-02-14 23:10:57
3	Alex Cornellier	102	Ruby	2020-09-08 23:30:35
4	Miorel Palii	134	Ruby	2017-11-08 07:36:03
5	Régis Hanol	134	Ruby	2022-01-05 13:26:38
6	Jason Cheong-Kee-You	189	Ruby	2018-05-30 04:44:43
7	Hidden user	222	Ruby	2022-01-31 13:13:30
8	Roberto Sales	231	Ruby	2016-01-29 16:37:28
9	Macdara mac an tSionnaigh	260	Ruby	2019-09-14 04:01:14
10	Kellen Watt	261	Ruby	2016-06-04 22:38:17

#	User	Length	Language	Date
1	Vincent Lagerros	270	Rust	2024-12-03 21:04:09
2	Metin Gülseven	592	Rust	2022-09-11 20:28:51
3	Emil Dichmann	602	Rust	2025-09-14 12:34:33
4	Pankajkumar Patro	611	Rust	2024-08-05 22:20:30
5	Nathaniel Risum	653	Rust	2025-10-14 10:39:51
6	Constantin Buruiana	688	Rust	2024-09-07 23:43:17
7	Cameron Otts	723	Rust	2019-07-31 19:02:52
8	Hidden user	728	Rust	2021-02-11 08:34:54
9	Nick Dolan	749	Rust	2019-08-01 16:31:47
10	Evelyn May	752	Rust	2020-01-26 00:31:27

#	User	Length	Language	Date
1	Joe Blower	1359	Zig	2025-05-17 23:35:02

Solution running time distribution