Problem A
Help a PhD candidate out! — Problem Statistics

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Submissions	11502
Accepted submissions	6187
Submission ratio	53.79%
Authors	5953
Accepted authors	5619
Author ratio	94.39%

#	User	Runtime	Language	Date
1	Jakob Rødal Skaar	0.04 s	Bash	2024-01-22 14:31:17
2	Chenzhang Hu	0.05 s	Bash	2023-09-26 16:51:59
3	Thomas Feld	0.05 s	Bash	2023-09-26 17:54:27

#	User	Runtime	Language	Date
1	Allan Agerholm Dahl	0.02 s	C#	2017-10-01 15:33:26
2	Duelene Olson	0.02 s	C#	2017-11-22 22:38:04
3	Faisal Rahman	0.02 s	C#	2017-11-27 10:30:52
4	Jeffrey Ver	0.02 s	C#	2017-12-12 04:04:39
5	Cole Alves	0.02 s	C#	2017-12-14 18:22:16
6	Andreas Ljungberg	0.02 s	C#	2017-12-16 17:15:23
7	Jeremiah A. Stringer	0.02 s	C#	2017-12-21 20:21:04
8	Chase Oberg	0.02 s	C#	2017-12-23 16:27:38
9	Johan Pettersson	0.02 s	C#	2017-12-27 14:30:22
10	Klas af Geijerstam	0.02 s	C#	2018-01-12 23:55:21

#	User	Runtime	Language	Date
1	Brandon Mitchell	0.00 s	COBOL	2020-04-09 06:45:38

#	User	Runtime	Language	Date
1	Islam Omar	0.01 s	Common Lisp	2019-08-25 09:15:51
2	Philippos Boon Alexaki	0.01 s	Common Lisp	2019-11-18 16:59:29
3	David Cawthon	0.03 s	Common Lisp	2019-04-15 02:01:32
4	Hidden user	0.03 s	Common Lisp	2019-05-23 05:59:23

#	User	Runtime	Language	Date
1	Patrick Bahr	0.04 s	F#	2021-02-13 15:28:14
2	Jacob Harris Cryer Kragh	0.04 s	F#	2022-06-06 13:39:24
3	Hidden user	0.05 s	F#	2020-08-17 17:46:49
4	dix	0.08 s	F#	2024-11-05 18:00:18

#	User	Runtime	Language	Date
1	Husain Satan	0.00 s	Go	2023-11-16 20:10:11
2	suka isnaini	0.00 s	Go	2023-12-17 12:15:27
3	Albert Leung	0.00 s	Go	2024-08-10 03:41:55
4	Jimmy Nejtron	0.00 s	Go	2024-08-25 21:37:32
5	selyann berrada	0.00 s	Go	2024-12-29 06:18:04
6	n k	0.00 s	Go	2025-01-13 15:41:08
7	Anmol Sharma	0.02 s	Go	2019-11-08 11:22:38
8	Erik Rairden	0.02 s	Go	2020-09-27 13:57:37
9	Péter Szakszon	0.02 s	Go	2022-01-15 19:04:10
10	Miguel Martinez	0.03 s	Go	2019-07-12 07:01:48

#	User	Runtime	Language	Date
1	Isaac Arvestad	0.00 s	Haskell	2018-11-23 17:39:10
2	Jan Hrček	0.00 s	Haskell	2020-10-20 05:58:17
3	Tim Put	0.00 s	Haskell	2021-11-08 03:23:09
4	Brent Yorgey	0.01 s	Haskell	2017-11-19 21:06:13
5	Olle Eriksson	0.01 s	Haskell	2017-11-28 05:24:29
6	Matthew Johnson	0.01 s	Haskell	2017-12-12 05:22:25
7	Hidden user	0.01 s	Haskell	2017-12-16 12:14:56
8	Blake Hyde	0.01 s	Haskell	2017-12-18 18:05:15
9	Charley Sheaffer	0.01 s	Haskell	2018-04-12 17:24:29
10	Jacques Schutte	0.01 s	Haskell	2018-04-16 10:07:17

#	User	Runtime	Language	Date
1	Lee Heng Sheng	0.05 s	Java	2024-04-28 11:41:44
2	Steven Cheng	0.06 s	Java	2017-11-19 18:22:07
3	Aron Bergman	0.06 s	Java	2017-11-27 08:30:09
4	Jasper van Merle	0.06 s	Java	2017-11-28 01:53:54
5	Liam Keliher	0.06 s	Java	2017-11-28 18:07:05
6	Juan David Marín Cerón	0.06 s	Java	2017-12-15 23:15:22
7	Martijn Muijsers	0.06 s	Java	2018-05-27 15:45:11
8	José Vander Meulen	0.06 s	Java	2018-10-06 22:33:07
9	CUX "INDIO" PRADA	0.06 s	Java	2024-08-10 05:59:47
10	Finn Lidbetter	0.07 s	Java	2017-11-23 04:26:31

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	JavaScript (Node.js)	2019-07-02 13:40:12
2	TEJA KUSUMA	0.05 s	JavaScript (Node.js)	2024-03-01 03:29:20
3	Carl Sundvall	0.06 s	JavaScript (Node.js)	2018-11-12 14:01:27
4	Hidden user	0.06 s	JavaScript (Node.js)	2024-08-14 06:34:53
5	Marko Lazic	0.07 s	JavaScript (Node.js)	2018-06-14 12:03:09
6	Michael Zetterholm	0.07 s	JavaScript (Node.js)	2018-07-04 19:23:48
7	Sander Hellesø	0.07 s	JavaScript (Node.js)	2019-04-16 08:00:40
8	Zak Freeman	0.08 s	JavaScript (Node.js)	2018-06-11 18:30:53
9	Vu Van Dung	0.10 s	JavaScript (Node.js)	2022-09-14 21:24:56
10	Ram Basnet	0.42 s	JavaScript (Node.js)	2020-01-21 01:06:29

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2017-11-19 21:58:30
2	Robin Livesey	0.01 s	JavaScript (SpiderMonkey)	2018-04-16 11:09:16
3	John Goh	0.02 s	JavaScript (SpiderMonkey)	2017-11-22 05:42:50
4	Nicklas Utgaard	0.02 s	JavaScript (SpiderMonkey)	2017-12-25 15:38:28
5	Zachary DeStefano	0.02 s	JavaScript (SpiderMonkey)	2018-01-25 07:42:38
6	Manish Paudel	0.02 s	JavaScript (SpiderMonkey)	2018-03-09 06:46:39
7	Lionel KITIHOUN	0.02 s	JavaScript (SpiderMonkey)	2018-06-24 04:37:08
8	Nguyễn Mạnh Phúc	0.03 s	JavaScript (SpiderMonkey)	2018-09-08 06:04:35
9	Johannes Jensen	0.03 s	JavaScript (SpiderMonkey)	2018-10-30 23:23:05
10	Casey Smith	0.03 s	JavaScript (SpiderMonkey)	2019-05-24 18:07:39

#	User	Runtime	Language	Date
1	Norbert Voelker	0.59 s	Julia	2023-08-13 21:57:48
2	Danny Robinson	0.62 s	Julia	2023-06-22 01:58:29
3	Timothy Gaede	0.63 s	Julia	2024-03-28 02:15:41

#	User	Runtime	Language	Date
1	Albert Pala	0.17 s	Kotlin	2021-05-28 11:16:02
2	James WIlliams	0.18 s	Kotlin	2020-09-02 00:13:51
3	Ravisai Tiruvuri	0.21 s	Kotlin	2024-03-09 09:56:17
4	Adam Rankin	0.23 s	Kotlin	2023-04-22 01:59:51
5	Zaw Myat	0.23 s	Kotlin	2024-01-05 18:23:05
6	Love Engman	0.24 s	Kotlin	2018-01-13 11:40:22
7	Stefan Kennedy	0.25 s	Kotlin	2017-12-05 18:27:46
8	Nick Ivanov	0.25 s	Kotlin	2018-03-01 04:02:23
9	Jahid Hasan Imon	0.25 s	Kotlin	2020-05-09 02:59:12
10	Ahmed Waseem Saeed	0.25 s	Kotlin	2021-12-25 22:46:40

#	User	Runtime	Language	Date
1	Erik K	0.00 s	OCaml	2020-10-02 06:37:07
2	Philip Pham	0.00 s	OCaml	2020-10-06 03:52:07
3	Rafał Gwoździński	0.00 s	OCaml	2021-05-26 21:32:49
4	Xiu-Heng Hua	0.00 s	OCaml	2024-12-14 10:21:29
5	Danil Braun	0.01 s	OCaml	2021-05-07 14:19:11

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2017-11-25 15:41:40
2	David Connolly	0.00 s	Pascal	2017-12-01 18:38:56
3	Egor Shchetinin	0.00 s	Pascal	2018-01-20 18:02:25
4	Vova Podkorytov	0.00 s	Pascal	2018-01-20 18:09:06

#	User	Runtime	Language	Date
1	Emil Riis Hansen	0.01 s	PHP	2018-10-30 08:46:25
2	Jonas Lindenskov Nielsen	0.01 s	PHP	2019-09-15 11:08:56
3	Renate	0.01 s	PHP	2021-04-19 14:47:13
4	陳建宏	0.01 s	PHP	2021-05-06 17:53:52
5	Andre Wahyudi	0.01 s	PHP	2023-03-16 08:09:21

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.02 s	Prolog	2018-03-27 19:09:00
2	Hakan Kjellerstrand	0.02 s	Prolog	2023-02-06 20:36:49

#	User	Runtime	Language	Date
1	Oskar Haarklou Veileborg	0.02 s	Python 3	2017-10-01 11:05:02
2	Jakob Ronestjärna	0.02 s	Python 3	2017-10-01 11:11:59
3	Hidden user	0.02 s	Python 3	2017-10-01 11:16:45
4	Mads Svejstrup	0.02 s	Python 3	2017-10-01 12:29:40
5	Halvor Fladsrud Bø	0.02 s	Python 3	2017-10-01 15:09:40
6	Ciara Godwin	0.02 s	Python 3	2017-11-18 21:19:19
7	Manu Lam	0.02 s	Python 3	2017-11-20 13:30:21
8	Peter Beattie	0.02 s	Python 3	2017-11-21 00:43:41
9	Hakan Celik	0.02 s	Python 3	2017-11-21 19:29:57
10	Ryan Strauss	0.02 s	Python 3	2017-11-23 23:07:50

#	User	Runtime	Language	Date
1	Hidden user	0.03 s	Ruby	2017-12-26 00:29:56
2	Mona Dadoun	0.03 s	Ruby	2018-01-04 16:49:42
3	Paul Vinell	0.03 s	Ruby	2018-04-10 10:27:51
4	Jason Cheong-Kee-You	0.04 s	Ruby	2018-05-29 04:30:06
5	Angelo Ruperti	0.04 s	Ruby	2019-09-05 22:46:39
6	Macdara mac an tSionnaigh	0.04 s	Ruby	2019-09-27 02:32:21
7	Dylan Mcdougall	0.04 s	Ruby	2019-11-05 19:39:29
8	Abolfazl Gol	0.05 s	Ruby	2018-07-28 13:00:34
9	Hidden user	0.05 s	Ruby	2018-10-20 13:39:42
10	Hidden user	0.05 s	Ruby	2018-12-06 14:16:19

#	User	Length	Language	Date
1	Chenzhang Hu	5	Bash	2024-02-03 15:40:45
2	Thomas Feld	13	Bash	2023-09-26 17:55:08
3	Jakob Rødal Skaar	194	Bash	2024-01-22 14:31:17

#	User	Length	Language	Date
1	Martin Blom	146	C	2023-10-20 20:01:28
2	Eduardo Núñez	183	C	2024-02-25 21:02:20
3	Stian Toften	221	C	2021-04-16 00:32:58
4	Mahmoud Moawad	228	C	2021-10-17 11:51:17
5	Jeisson Hidalgo-Céspedes	259	C	2022-12-18 04:25:27
6	Fiza	264	C	2022-04-09 02:29:33
7	Ximun Castoreo	265	C	2020-09-21 10:59:25
8	Seth Carter	291	C	2017-11-26 13:55:20
9	林楷倫	308	C	2021-07-22 05:53:44
10	Boris Vanhoof	311	C	2025-02-27 20:36:19

#	User	Length	Language	Date
1	Hidden user	354	C#	2024-07-30 20:27:43
2	Kunwei Zhang	372	C#	2018-02-04 13:28:31
3	Nicke Nyfiken	375	C#	2025-02-18 11:10:33
4	Deci Bel	399	C#	2024-10-17 13:25:03
5	Esty Crow	402	C#	2023-04-06 03:05:30
6	Jeffrey Ver	416	C#	2017-12-12 04:04:39
7	Bin Huang	441	C#	2019-09-17 16:32:49
8	florist swe	442	C#	2024-12-07 00:34:41
9	Leslie Yip	446	C#	2022-07-13 05:01:27
10	Steve Jia	454	C#	2018-08-29 20:26:50

#	User	Length	Language	Date
1	Hakan Kjellerstrand	203	C++	2025-02-17 12:07:37
2	Steven Gay	248	C++	2021-03-08 11:06:26
3	Emmanuel Anaya	257	C++	2021-02-20 06:36:47
4	Janna Zaman	264	C++	2022-04-09 02:14:47
5	Yahya Ghazanfar	264	C++	2022-04-09 02:25:22
6	Brayan Sosa	264	C++	2022-04-09 02:25:56
7	Steven Pham	264	C++	2022-04-09 02:26:05
8	Fiza	264	C++	2022-04-09 02:28:29
9	Benjamin Truong	264	C++	2022-04-09 02:34:34
10	Hatem Saleh	266	C++	2022-04-09 02:45:19

#	User	Length	Language	Date
1	Brandon Mitchell	623	COBOL	2020-04-09 06:45:38

#	User	Length	Language	Date
1	David Cawthon	328	Common Lisp	2019-04-15 02:01:32
2	Hidden user	354	Common Lisp	2019-05-23 05:59:23
3	Philippos Boon Alexaki	470	Common Lisp	2019-11-18 16:59:29
4	Islam Omar	1468	Common Lisp	2019-08-25 09:15:51

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	277	F#	2022-06-06 13:39:24
2	dix	319	F#	2024-11-05 18:00:18
3	Hidden user	808	F#	2020-08-17 18:54:51
4	Patrick Bahr	1924	F#	2021-02-13 15:28:14

#	User	Length	Language	Date
1	Conrad Parker	273	Go	2020-08-14 02:33:05
2	Hidden user	285	Go	2023-04-12 19:50:53
3	Hidden user	286	Go	2021-12-15 13:22:16
4	Wojtek Bednarzak	291	Go	2018-04-30 20:58:53
5	suka isnaini	312	Go	2023-12-17 12:15:27
6	Hidden user	324	Go	2021-10-12 19:32:52
7	n k	346	Go	2025-01-13 15:41:08
8	Miguel Martinez	349	Go	2019-07-12 07:01:48
9	Alejandro Germain	355	Go	2018-09-30 15:45:36
10	BALAMURUGAN S cse	361	Go	2020-08-09 17:33:21

#	User	Length	Language	Date
1	Sebastian Banert	205	Haskell	2023-09-03 18:54:20
2	Freek van Keulen	207	Haskell	2021-02-15 09:42:48
3	Nicholas Marsh	208	Haskell	2022-09-17 19:07:15
4	Matthew Gvasalia	209	Haskell	2023-04-17 15:30:39
5	Frederik Haagensen	222	Haskell	2019-11-08 12:45:26
6	Li Jun	222	Haskell	2023-06-20 18:16:19
7	Matthew Johnson	224	Haskell	2017-12-12 05:22:25
8	Monique Oliveira	231	Haskell	2021-06-17 02:59:36
9	Aurélien Pepin	276	Haskell	2019-09-07 09:34:19
10	David Zacek	280	Haskell	2021-05-02 22:55:23

#	User	Length	Language	Date
1	Russell Rivard	400	Java	2022-01-21 20:22:43
2	Nay Thit	414	Java	2019-10-12 11:11:29
3	Jamie Walton	415	Java	2021-02-12 07:53:36
4	LovetheFrogs	416	Java	2023-07-14 18:26:38
5	Jeffrey Tong	422	Java	2020-02-06 03:13:24
6	John Copley	423	Java	2017-11-28 18:07:01
7	Justin Turner	424	Java	2018-01-15 23:21:32
8	Anton Sandin	430	Java	2022-04-25 15:43:14
9	Daniel Q	433	Java	2021-08-09 02:39:57
10	Prakash Sanyasi	434	Java	2018-10-06 18:01:19

#	User	Length	Language	Date
1	Karim Dridi	209	JavaScript (Node.js)	2022-01-14 00:32:30
2	Zak Freeman	331	JavaScript (Node.js)	2018-06-11 18:30:53
3	Michael Zetterholm	341	JavaScript (Node.js)	2018-07-04 19:24:15
4	Peter Kedemo	371	JavaScript (Node.js)	2020-01-01 12:51:07
5	Vu Van Dung	376	JavaScript (Node.js)	2022-09-14 21:24:56
6	Hidden user	389	JavaScript (Node.js)	2023-08-14 19:57:58
7	Antoine Bauri	410	JavaScript (Node.js)	2021-02-18 15:29:03
8	Chris Wong	485	JavaScript (Node.js)	2021-02-03 01:41:22
9	Ali	494	JavaScript (Node.js)	2021-12-19 10:42:24
10	addamove	551	JavaScript (Node.js)	2022-02-20 18:40:19

#	User	Length	Language	Date
1	Christian Cederquist	53	JavaScript (SpiderMonkey)	2022-11-14 23:40:03
2	Jimmy Gustafsson	61	JavaScript (SpiderMonkey)	2024-06-17 11:57:39
3	Nguyễn Mạnh Phúc	119	JavaScript (SpiderMonkey)	2018-09-08 06:04:35
4	Evan Magill	141	JavaScript (SpiderMonkey)	2024-04-22 20:43:34
5	Bjørn Chr. Soltvedt	146	JavaScript (SpiderMonkey)	2017-11-19 21:58:30
6	John Goh	146	JavaScript (SpiderMonkey)	2017-11-22 05:42:50
7	Peter Menyes	149	JavaScript (SpiderMonkey)	2021-02-05 18:49:48
8	Manish Paudel	183	JavaScript (SpiderMonkey)	2018-03-09 06:46:39
9	Zach Tschetter	188	JavaScript (SpiderMonkey)	2023-04-22 01:52:10
10	Casey Smith	191	JavaScript (SpiderMonkey)	2019-05-24 18:07:39

#	User	Length	Language	Date
1	Danny Robinson	83	Julia	2023-06-22 01:58:29
2	Norbert Voelker	280	Julia	2023-08-13 21:57:48
3	Timothy Gaede	415	Julia	2024-03-28 02:15:41

#	User	Length	Language	Date
1	axl	249	Kotlin	2019-08-06 13:16:51
2	Garrison Hatcher	250	Kotlin	2019-11-11 19:55:48
3	Stefan Kennedy	305	Kotlin	2017-12-05 18:27:46
4	Hidden user	307	Kotlin	2019-11-14 21:38:16
5	Ahmed Waseem Saeed	309	Kotlin	2021-12-25 22:46:40
6	Love Engman	311	Kotlin	2018-01-13 11:40:22
7	Jahid Hasan Imon	311	Kotlin	2020-05-09 02:59:12
8	Nick Ivanov	329	Kotlin	2018-03-01 04:02:23
9	Clinton Walker	341	Kotlin	2019-10-07 03:34:18
10	Troy Warmboe	341	Kotlin	2020-02-10 21:30:16

#	User	Length	Language	Date
1	Rafał Gwoździński	271	OCaml	2021-05-26 21:32:49
2	Xiu-Heng Hua	271	OCaml	2024-12-14 10:21:29
3	Erik K	404	OCaml	2020-10-02 06:37:07
4	Danil Braun	424	OCaml	2021-05-07 14:19:11
5	Philip Pham	473	OCaml	2020-10-06 03:52:07

#	User	Length	Language	Date
1	Ingemar Ragnemalm	688	Pascal	2017-11-25 15:41:40
2	Vova Podkorytov	790	Pascal	2018-01-20 18:09:06
3	David Connolly	801	Pascal	2017-12-01 18:38:56
4	Egor Shchetinin	1048	Pascal	2018-01-20 18:02:25

#	User	Length	Language	Date
1	陳建宏	216	PHP	2021-05-06 17:53:52
2	Renate	284	PHP	2021-04-19 14:47:13
3	Jonas Lindenskov Nielsen	288	PHP	2019-09-15 11:08:56
4	Emil Riis Hansen	484	PHP	2018-10-30 08:46:25
5	Andre Wahyudi	584	PHP	2023-03-16 08:09:21

#	User	Length	Language	Date
1	Hakan Kjellerstrand	187	Prolog	2023-02-06 20:36:49
2	Andriy Zyevakov	253	Prolog	2018-03-27 19:09:00

#	User	Length	Language	Date
1	Kevin Gomez	57	Python 3	2024-11-13 00:37:37
2	Clement Oh	59	Python 3	2023-06-02 18:41:41
3	Morten Clausen	62	Python 3	2022-10-05 16:36:54
4	Tai Tze Kin	70	Python 3	2024-05-01 21:42:35
5	Kristian Sørdal	74	Python 3	2024-01-24 12:20:26
6	Elijah Satrom	76	Python 3	2022-10-18 19:49:57
7	Noah Hessen Bjerke	76	Python 3	2022-12-06 13:37:27
8	JY Loh	79	Python 3	2022-12-04 17:50:04
9	Ryan Pitasky	80	Python 3	2023-03-17 21:27:07
10	Do Khoi Nguyen	81	Python 3	2024-12-19 22:19:58

#	User	Length	Language	Date
1	Thomas Feld	39	Ruby	2022-12-22 15:01:58
2	Clement Oh	50	Ruby	2024-03-03 16:24:16
3	Régis Hanol	60	Ruby	2022-01-07 00:04:36
4	Paul Vinell	114	Ruby	2018-04-10 10:27:51
5	Jason Cheong-Kee-You	123	Ruby	2018-05-29 04:30:06
6	Hidden user	123	Ruby	2018-10-20 13:39:42
7	TobiasZ	140	Ruby	2022-01-20 19:52:29
8	Eugen Neagoe	143	Ruby	2023-05-09 16:00:12
9	Alexander Bilde Pedersen	143	Ruby	2024-10-31 22:42:26
10	Hidden user	145	Ruby	2019-03-29 15:40:16

#	User	Length	Language	Date
1	Vincent Lagerros	195	Rust	2024-09-27 20:04:03
2	Thomas	392	Rust	2022-04-12 21:35:49
3	Bas Dirks	439	Rust	2021-12-30 00:37:10
4	Ole Vik Lysne	444	Rust	2024-01-22 00:57:04
5	Alex	467	Rust	2020-11-15 00:32:49
6	Laura Parkes	484	Rust	2022-08-26 20:42:01
7	Pizza Hut	495	Rust	2025-01-26 23:13:30
8	Chaoyi Yin	536	Rust	2019-04-01 20:17:47
9	Lars Haukland	552	Rust	2024-01-19 15:51:43
10	Thobias Larsen	555	Rust	2023-01-28 12:22:16

Solution running time distribution