Problem A
Beavergnaw — Problem Statistics

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Submissions	3265
Accepted submissions	2082
Submission ratio	63.77%
Authors	1987
Full solves [?]	1873
Full solve Ratio	94.26%

#	User	Runtime	Language	Date
1	Kunwei Zhang	0.01 s	C#	2018-02-05 04:56:53
2	masosz	0.02 s	C#	2015-04-18 15:08:52
3	Robert Low	0.02 s	C#	2016-07-14 17:05:27
4	Ugnius Skučas	0.02 s	C#	2016-10-06 10:45:09
5	Hidden user	0.02 s	C#	2016-12-20 11:59:08
6	Michael Gulliksen	0.02 s	C#	2017-01-21 10:54:22
7	Marius Løkketangen	0.02 s	C#	2017-01-22 19:14:42
8	Jens Mossig	0.02 s	C#	2017-02-12 19:24:30
9	Hidden user	0.02 s	C#	2017-04-22 14:16:16
10	Rasmus Brants	0.02 s	C#	2017-04-29 09:34:37

#	User	Runtime	Language	Date
1	John Dandy	0.01 s	Common Lisp	2020-02-05 09:07:08
2	wibi	0.01 s	Common Lisp	2020-08-26 14:34:11
3	David Cawthon	0.01 s	Common Lisp	2021-01-18 04:42:46

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.04 s	F#	2022-06-12 20:10:42

#	User	Runtime	Language	Date
1	Neal McCarthy	0.01 s	Go	2018-10-28 22:24:11
2	Krzysztof Gibuła	0.02 s	Go	2019-01-19 13:46:59
3	Samsu Sempena	0.02 s	Go	2020-11-08 12:24:49
4	Einar Kjellback	0.02 s	Go	2021-03-10 21:51:35
5	Norbert Voelker	0.02 s	Go	2021-04-10 13:37:42
6	Jonas Hedin	0.08 s	Go	2015-02-25 23:00:29
7	Adam Evans	0.08 s	Go	2016-04-19 16:41:40
8	Ian Howell	0.08 s	Go	2016-06-13 04:24:38
9	Leonardo Gurgel	0.08 s	Go	2021-05-04 22:45:17

#	User	Runtime	Language	Date
1	Taras Romanyuk	0.04 s	Java	2024-11-23 01:21:22
2	Erik Odenman	0.05 s	Java	2012-11-21 17:51:11
3	Henrik Sandström	0.05 s	Java	2015-01-18 17:38:25
4	Andreas Jansson	0.05 s	Java	2016-01-30 17:38:41
5	Erik Baalhuis	0.05 s	Java	2016-03-08 00:58:49
6	Simon Xue	0.05 s	Java	2016-03-14 00:12:05
7	Hidden user	0.05 s	Java	2016-05-05 11:28:14
8	Nick Wu	0.05 s	Java	2016-05-25 03:25:05
9	Micah Stairs	0.05 s	Java	2016-09-22 13:31:19
10	James Black	0.05 s	Java	2016-09-23 01:36:16

#	User	Runtime	Language	Date
1	Hidden user	0.04 s	JavaScript (Node.js)	2024-11-04 04:26:04
2	Murat Deniz	0.04 s	JavaScript (Node.js)	2025-08-22 14:15:11
3	Carl Sundvall	0.05 s	JavaScript (Node.js)	2018-10-28 13:16:42
4	Chris Wong	0.41 s	JavaScript (Node.js)	2021-02-05 03:05:17
5	John	0.42 s	JavaScript (Node.js)	2020-07-21 03:09:24
6	Andoko Chandra	0.42 s	JavaScript (Node.js)	2020-10-02 15:30:58

#	User	Runtime	Language	Date
1	Christian Svensson	0.01 s	JavaScript (SpiderMonkey)	2015-10-10 02:43:16
2	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2016-01-04 21:00:02
3	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-04-13 17:08:19
4	Tor Nordqvist	0.01 s	JavaScript (SpiderMonkey)	2016-11-14 17:48:10
5	Øyvind Skaar	0.01 s	JavaScript (SpiderMonkey)	2017-01-18 20:11:19
6	Nicklas Utgaard	0.01 s	JavaScript (SpiderMonkey)	2017-01-24 08:50:11
7	Davíð Helgason	0.01 s	JavaScript (SpiderMonkey)	2017-08-07 18:49:16
8	Peter Menyes	0.01 s	JavaScript (SpiderMonkey)	2017-08-09 16:29:54
9	Robin Livesey	0.01 s	JavaScript (SpiderMonkey)	2018-04-16 20:43:36
10	Jeremy Loh	0.02 s	JavaScript (SpiderMonkey)	2019-01-07 13:36:59

#	User	Runtime	Language	Date
1	Timothy Gaede	0.70 s	Julia	2024-03-31 09:16:17

#	User	Runtime	Language	Date
1	Jacob Huebner	0.13 s	Kotlin	2020-06-25 06:31:49
2	arda atci	0.15 s	Kotlin	2020-07-09 22:01:22
3	Dayan Ruben Gonzalez	0.16 s	Kotlin	2020-09-27 22:35:46
4	Neil Harmon	0.19 s	Kotlin	2019-04-05 11:59:39
5	Jahid Hasan Imon	0.19 s	Kotlin	2020-05-21 19:56:07
6	Albert Pala	0.19 s	Kotlin	2021-06-24 13:38:35
7	Adam Rankin	0.20 s	Kotlin	2023-04-26 19:04:15
8	Hidden user	0.24 s	Kotlin	2020-03-12 23:47:37
9	Hawk Wietlol	0.25 s	Kotlin	2019-04-04 20:19:35

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	OCaml	2020-09-15 11:22:42
2	Will Killian	0.00 s	OCaml	2022-09-25 02:46:00

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2017-11-28 15:02:01
2	Magnus Ragnemalm	0.00 s	Pascal	2017-12-15 19:52:58
3	Krzys Hejno	0.00 s	Pascal	2025-02-25 00:16:16

#	User	Runtime	Language	Date
1	Steven D. Wilson	0.01 s	PHP	2016-11-17 08:45:43
2	Emil Riis Hansen	0.01 s	PHP	2018-10-29 13:32:25
3	Jesper Brodersen	0.01 s	PHP	2018-11-02 08:43:04
4	Helbin Grégory	0.01 s	PHP	2020-02-09 11:29:23
5	Renate	0.01 s	PHP	2021-05-09 23:11:12
6	Marshall D Feng	0.01 s	PHP	2022-09-25 17:29:19
7	Tom Merzenich	0.01 s	PHP	2023-11-28 02:18:29

#	User	Runtime	Language	Date
1	Hadi Qovaizi	0.01 s	Prolog	2016-12-22 08:27:39
2	Andriy Zyevakov	0.01 s	Prolog	2018-03-28 19:55:36

#	User	Runtime	Language	Date
1	Christofer Ohlsson	0.02 s	Python 2	2015-08-15 09:51:30
2	Urban Pettersson	0.02 s	Python 2	2015-10-09 18:37:53
3	Oskar Haarklou Veileborg	0.02 s	Python 2	2015-11-27 00:08:04
4	David Bundgaard	0.02 s	Python 2	2016-02-06 22:50:34
5	Kristian Gregorius Hustad	0.02 s	Python 2	2016-06-25 23:44:55
6	Erik Sillén	0.02 s	Python 2	2016-08-07 18:08:02
7	Maksym Bendeberia	0.02 s	Python 2	2016-08-21 17:50:18
8	Frederik Højholt	0.02 s	Python 2	2016-09-09 15:18:04
9	Haggai Liu	0.02 s	Python 2	2017-01-15 05:23:24
10	Muzakhir Amanzholov	0.02 s	Python 2	2017-02-02 20:03:35

#	User	Runtime	Language	Date
1	Ana Drenik	0.02 s	Python 3	2015-08-16 22:03:10
2	Mikael Hedin	0.02 s	Python 3	2015-12-22 23:26:58
3	Johan Sannemo	0.02 s	Python 3	2016-04-04 10:54:04
4	Lucia Pál (Simanová)	0.02 s	Python 3	2016-06-17 11:43:48
5	Gregor Taube	0.02 s	Python 3	2016-07-01 20:55:00
6	Shane Grogan	0.02 s	Python 3	2016-08-09 15:12:09
7	Andrew He	0.02 s	Python 3	2016-08-11 19:24:08
8	Nicolas Marsceau	0.02 s	Python 3	2016-08-12 23:13:39
9	Simen Keiland Fondevik	0.02 s	Python 3	2016-08-14 18:35:22
10	Elsie Mestl	0.02 s	Python 3	2016-08-14 18:40:20

#	User	Runtime	Language	Date
1	Casper Christensen	0.03 s	Ruby	2016-04-02 21:23:06
2	Erik Rydbert	0.03 s	Ruby	2016-07-14 17:43:22
3	Paul Vinell	0.04 s	Ruby	2018-04-15 10:01:54
4	Angelo Ruperti	0.04 s	Ruby	2019-09-24 16:36:10
5	Hadi Qovaizi	0.05 s	Ruby	2021-07-18 03:56:34
6	Miorel Palii	0.05 s	Ruby	2022-02-28 05:38:49
7	Marshall D Feng	0.06 s	Ruby	2022-09-25 07:59:54
8	Thomas Feld	0.06 s	Ruby	2022-11-16 12:51:26
9	Zach Ventimiglia	0.07 s	Ruby	2025-02-12 14:57:10

#	User	Length	Language	Date
1	Will Killian	143	C	2022-09-25 04:49:20
2	Martin Blom	143	C	2024-01-02 12:00:24
3	Donikon Fajar	219	C	2018-11-07 13:56:14
4	Hidden user	223	C	2017-02-02 11:35:35
5	Pontus Eriksson	228	C	2017-08-02 12:14:42
6	Matteo Piano	234	C	2016-12-20 15:34:11
7	Ximun Castoreo	234	C	2020-07-07 13:09:09
8	Andreas Dölerud	235	C	2020-12-08 10:53:07
9	Ehsan Shoja	236	C	2018-06-25 05:31:50
10	Hidden user	245	C	2020-01-29 10:44:45

#	User	Length	Language	Date
1	Kunwei Zhang	405	C#	2018-02-05 04:56:53
2	Pavel Mardouski	451	C#	2021-01-15 05:41:18
3	Alireza Nasrollahzadeh	469	C#	2018-06-10 15:48:47
4	Michael Gulliksen	481	C#	2017-01-21 10:54:22
5	Eric Bäckhage	481	C#	2019-02-05 13:04:00
6	Ugnius Skučas	522	C#	2016-10-06 10:45:09
7	Steve Jia	534	C#	2018-09-04 21:14:10
8	Armin Krauss	539	C#	2018-11-11 10:17:15
9	Gurpartap Singh Bhatti	563	C#	2019-12-11 02:42:36
10	Göran Andersson	626	C#	2022-05-12 21:46:47

#	User	Length	Language	Date
1	Tyler Fernando	103	C++	2022-11-21 13:07:08
2	Lawry Sorenson	106	C++	2022-11-04 23:47:17
3	Marshall D Feng	115	C++	2022-09-25 06:23:13
4	Will Killian	141	C++	2022-09-25 04:55:20
5	David Wärn	176	C++	2015-05-26 19:48:02
6	Luciano Arnaldo Romero Calla	180	C++	2021-08-04 21:27:18
7	Way Tan	184	C++	2018-11-27 12:16:23
8	William Gan	193	C++	2017-07-31 10:09:08
9	Omar Chadad	200	C++	2018-05-02 01:17:46
10	Joel Au	202	C++	2020-05-14 04:27:48

#	User	Length	Language	Date
1	John Dandy	289	Common Lisp	2020-02-05 09:07:08
2	David Cawthon	349	Common Lisp	2021-01-18 04:42:46
3	wibi	426	Common Lisp	2020-08-26 14:34:11

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	290	F#	2022-06-12 20:10:42

#	User	Length	Language	Date
1	Ian Howell	276	Go	2016-06-13 04:24:38
2	Samsu Sempena	281	Go	2020-11-08 12:24:49
3	Leonardo Gurgel	284	Go	2021-05-04 22:45:17
4	Jonas Hedin	312	Go	2015-02-25 23:05:25
5	Einar Kjellback	357	Go	2021-03-10 21:51:35
6	Krzysztof Gibuła	408	Go	2019-01-19 13:46:59
7	Adam Evans	428	Go	2016-04-19 16:41:40
8	Neal McCarthy	657	Go	2018-10-28 22:24:11
9	Norbert Voelker	1278	Go	2021-04-10 13:37:42

#	User	Length	Language	Date
1	Monique Oliveira	159	Haskell	2021-07-20 07:36:09
2	Patrick Bahr	176	Haskell	2018-12-02 18:21:25
3	Peter Deal	194	Haskell	2016-05-12 15:29:47
4	Tim Put	194	Haskell	2021-05-12 05:25:14
5	Andrew Mark Allen	217	Haskell	2017-03-16 01:39:26
6	Enzo Crance	217	Haskell	2018-08-16 19:57:14
7	Sebastian Banert	223	Haskell	2023-10-15 15:44:04
8	Carl Agrell	252	Haskell	2016-09-28 16:44:22
9	Håkon Flatval	252	Haskell	2018-08-10 17:18:56
10	Hovig Manjikian	253	Haskell	2020-01-19 18:25:39

#	User	Length	Language	Date
1	Anirudh Rahul	302	Java	2016-09-08 02:45:04
2	Daniel West	310	Java	2018-01-31 17:14:02
3	Pedro Contipelli	327	Java	2016-05-11 01:49:02
4	Maki Nishikino	327	Java	2018-09-27 21:42:09
5	Eric Cannon	332	Java	2019-02-06 13:44:07
6	Ranjith M	332	Java	2023-01-25 02:18:01
7	Zimu Qin	336	Java	2015-07-16 13:04:16
8	Hidden user	338	Java	2018-05-28 02:02:31
9	Chao Ge	340	Java	2018-04-09 20:16:25
10	Zachary Hancock	343	Java	2016-11-26 18:43:41

#	User	Length	Language	Date
1	Murat Deniz	432	JavaScript (Node.js)	2025-08-22 14:15:11
2	Andoko Chandra	719	JavaScript (Node.js)	2020-10-02 15:30:58
3	Hidden user	999	JavaScript (Node.js)	2024-11-04 04:26:04
4	Carl Sundvall	1238	JavaScript (Node.js)	2018-10-28 13:16:42
5	John	1418	JavaScript (Node.js)	2020-07-21 03:09:24
6	Chris Wong	2923	JavaScript (Node.js)	2021-02-05 03:05:17

#	User	Length	Language	Date
1	Jimmy Gustafsson	95	JavaScript (SpiderMonkey)	2024-06-15 23:54:57
2	Christian Pilegaard Cederquist	186	JavaScript (SpiderMonkey)	2022-11-19 20:01:20
3	Bjørn Chr. Soltvedt	202	JavaScript (SpiderMonkey)	2016-04-13 17:08:19
4	Peter Kedemo	210	JavaScript (SpiderMonkey)	2016-01-04 21:00:02
5	Tor Nordqvist	233	JavaScript (SpiderMonkey)	2016-11-14 17:48:10
6	Øyvind Skaar	236	JavaScript (SpiderMonkey)	2017-01-18 20:11:19
7	Davíð Helgason	260	JavaScript (SpiderMonkey)	2017-08-07 18:49:16
8	Robin Livesey	275	JavaScript (SpiderMonkey)	2018-04-16 20:43:36
9	Nicklas Utgaard	292	JavaScript (SpiderMonkey)	2017-01-24 08:50:11
10	Bernard Perrin	688	JavaScript (SpiderMonkey)	2019-01-22 10:05:34

#	User	Length	Language	Date
1	Timothy Gaede	978	Julia	2024-03-31 09:16:17

#	User	Length	Language	Date
1	Dayan Ruben Gonzalez	301	Kotlin	2020-09-27 22:35:46
2	Jahid Hasan Imon	316	Kotlin	2020-05-21 19:56:07
3	arda atci	389	Kotlin	2020-07-09 22:01:22
4	Jacob Huebner	452	Kotlin	2020-06-25 06:31:49
5	Hidden user	455	Kotlin	2020-03-12 23:47:37
6	Adam Rankin	673	Kotlin	2023-04-26 19:04:15
7	Albert Pala	697	Kotlin	2021-06-24 13:38:35
8	Neil Harmon	861	Kotlin	2019-04-05 11:59:39
9	Hawk Wietlol	2045	Kotlin	2019-04-04 20:19:35

#	User	Length	Language	Date
1	Will Killian	137	OCaml	2022-09-25 04:01:55
2	Hidden user	552	OCaml	2020-09-15 11:22:42

#	User	Length	Language	Date
1	Ingemar Ragnemalm	225	Pascal	2017-11-28 15:02:01
2	Magnus Ragnemalm	242	Pascal	2017-12-15 19:52:58
3	Krzys Hejno	473	Pascal	2025-02-25 00:16:16

#	User	Length	Language	Date
1	Marshall D Feng	91	PHP	2022-09-25 17:29:19
2	Steven D. Wilson	149	PHP	2016-11-17 08:45:43
3	Renate	244	PHP	2021-05-09 23:11:12
4	Emil Riis Hansen	384	PHP	2018-10-29 13:32:25
5	Jesper Brodersen	388	PHP	2018-11-02 08:43:04
6	Tom Merzenich	470	PHP	2023-11-28 02:18:29
7	Helbin Grégory	493	PHP	2020-02-09 11:29:23

#	User	Length	Language	Date
1	Andriy Zyevakov	79	Prolog	2018-03-28 19:55:36
2	Hadi Qovaizi	1041	Prolog	2020-06-07 09:32:56

#	User	Length	Language	Date
1	Johan Lyts	135	Python 2	2019-06-12 22:10:32
2	Johan Wind	142	Python 2	2017-06-25 20:56:03
3	Thomas Feld	144	Python 2	2019-08-27 11:07:42
4	Haggai Liu	146	Python 2	2017-01-15 05:23:24
5	Sigurður Jens Albertsson	146	Python 2	2017-12-04 13:09:16
6	João Pedro Alvito	146	Python 2	2018-03-22 00:02:59
7	Muzakhir Amanzholov	151	Python 2	2017-02-02 20:03:35
8	Kristmundur Agust	152	Python 2	2017-10-06 21:55:29
9	Nathan Villanueva	154	Python 2	2017-05-03 22:33:07
10	Eoin Davey	158	Python 2	2017-09-11 13:31:54

#	User	Length	Language	Date
1	Armando Marquez Mazzeo	85	Python 3	2025-08-20 02:14:38
2	Lasse Letager Hansen	95	Python 3	2024-01-12 16:09:07
3	Sander Oppen	95	Python 3	2024-11-13 14:48:43
4	Charles Ancheta	98	Python 3	2023-03-24 08:12:23
5	Ahmed Chamseddine	102	Python 3	2024-03-21 17:43:24
6	Harry Zhang	104	Python 3	2023-06-15 12:03:07
7	Thomas Draper	104	Python 3	2023-06-25 01:29:59
8	Marshall D Feng	108	Python 3	2022-09-25 16:42:47
9	Lex Janssens	115	Python 3	2025-10-10 10:40:21
10	Dagur Máni Guðmundsson	117	Python 3	2023-11-23 19:40:54

#	User	Length	Language	Date
1	Thomas Feld	62	Ruby	2023-01-04 16:00:47
2	Marshall D Feng	85	Ruby	2022-09-25 17:14:36
3	Erik Rydbert	165	Ruby	2016-07-14 17:43:22
4	Miorel Palii	166	Ruby	2022-02-28 05:38:49
5	Zach Ventimiglia	218	Ruby	2025-02-12 14:57:10
6	Angelo Ruperti	291	Ruby	2019-09-24 16:36:10
7	Casper Christensen	341	Ruby	2016-04-02 21:23:06
8	Paul Vinell	430	Ruby	2018-04-15 10:01:54
9	Hadi Qovaizi	750	Ruby	2021-07-18 03:56:34

#	User	Length	Language	Date
1	Vincent Lagerros	403	Rust	2025-02-13 22:46:34
2	Kok Dith	439	Rust	2021-08-04 12:46:57
3	Pankajkumar Patro	479	Rust	2024-11-10 16:14:42
4	Eskil Queseth	489	Rust	2020-09-09 19:29:46
5	Hovig Manjikian	492	Rust	2020-01-21 00:43:12
6	Joost Scheffer	508	Rust	2021-11-04 11:55:00
7	Albert Rise Nielsen	558	Rust	2020-10-11 22:14:13
8	Chaoyi Yin	566	Rust	2019-03-25 16:36:47
9	Thomas	583	Rust	2020-12-11 22:49:50
10	Bas Dirks	601	Rust	2022-02-01 18:56:18

Solution running time distribution