Problem F
Teacher Evaluation — Problem Statistics

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Submissions	2609
Accepted submissions	844
Submission ratio	32.35%
Authors	817
Full solves [?]	702
Full solve Ratio	85.92%

#	User	Runtime	Language	Date
1	Jeremiah A. Stringer	0.02 s	C#	2017-09-24 03:25:50
2	Erik van Holland	0.02 s	C#	2018-10-11 16:48:30
3	Pim Agterberg	0.02 s	C#	2018-10-11 16:52:25
4	Ard Overkamp	0.02 s	C#	2018-10-11 17:07:25
5	Martijn den Hoedt	0.02 s	C#	2018-10-11 17:08:19
6	Arjan Hennink	0.02 s	C#	2018-10-17 13:34:48
7	Turan Kutlay Künbi	0.02 s	C#	2018-11-15 19:25:51
8	Mihai Spătariu	0.02 s	C#	2019-07-31 11:38:43
9	Arek Swierczek	0.02 s	C#	2020-11-12 21:20:11
10	Mikael Fiala-Lundström	0.02 s	C#	2022-02-06 16:45:51

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Common Lisp	2019-07-27 23:30:12

#	User	Runtime	Language	Date
1	Matthew Kennedy	0.08 s	F#	2025-11-22 21:07:39

#	User	Runtime	Language	Date
1	Junsong Yang	0.02 s	Go	2019-09-27 18:04:55
2	Norbert Voelker	0.07 s	Go	2021-09-12 23:54:19

#	User	Runtime	Language	Date
1	Brent Yorgey	0.00 s	Haskell	2018-06-02 22:54:33
2	Bjarki Baldursson Harksen	0.00 s	Haskell	2022-10-28 16:56:04
3	Mason Barnhill	0.00 s	Haskell	2023-05-04 06:36:57
4	Steinar Simonnes	0.00 s	Haskell	2024-06-13 11:43:23
5	David King	0.01 s	Haskell	2020-03-05 12:49:00
6	Frank Rodriguez	0.01 s	Haskell	2020-05-18 07:32:38
7	Jeremy Schmidt	0.09 s	Haskell	2020-05-16 23:45:46
8	Maximilian Chen	0.16 s	Haskell	2023-06-23 17:25:01

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.04 s	Java	2024-12-15 12:58:49
2	José Vander Meulen	0.05 s	Java	2018-05-07 20:44:05
3	Wouter Kool	0.05 s	Java	2018-10-11 17:03:51
4	Frank Tabak	0.05 s	Java	2018-10-11 17:19:20
5	Tobias Glimmerfors	0.05 s	Java	2018-10-13 08:29:53
6	Bjørn Dons	0.05 s	Java	2018-11-13 00:09:24
7	Vivan Gupta	0.05 s	Java	2024-03-08 02:05:01
8	Bao Quoc Phan	0.05 s	Java	2024-03-08 02:20:14
9	Markus Bao	0.05 s	Java	2026-01-14 09:40:07
10	Joost Linthorst	0.06 s	Java	2018-10-11 17:03:05

#	User	Runtime	Language	Date
1	Ram Basnet	0.05 s	JavaScript (Node.js)	2018-10-25 20:20:23
2	Carl Sundvall	0.05 s	JavaScript (Node.js)	2018-11-13 10:11:36

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2017-09-23 22:10:31
2	Piotr Karpala	0.02 s	JavaScript (SpiderMonkey)	2018-10-28 02:35:04
3	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-06-04 15:52:37
4	Zach Tschetter	0.02 s	JavaScript (SpiderMonkey)	2023-06-13 16:35:47
5	Evan Magill	0.02 s	JavaScript (SpiderMonkey)	2024-10-12 20:32:48

#	User	Runtime	Language	Date
1	Timothy Gaede	0.57 s	Julia	2024-05-26 08:38:59

#	User	Runtime	Language	Date
1	Hidden user	0.15 s	Kotlin	2020-02-25 14:00:54
2	Adrian Wireklint	0.15 s	Kotlin	2022-02-13 11:38:51
3	Przemysław Curzytek	0.18 s	Kotlin	2018-10-20 04:30:06
4	Phường Lên	0.18 s	Kotlin	2019-11-28 17:22:59
5	Sam Keyser	0.18 s	Kotlin	2023-05-10 19:14:54
6	Jonathan Keane	0.18 s	Kotlin	2023-05-11 14:10:01
7	Dayan Ruben Gonzalez	0.19 s	Kotlin	2020-10-09 05:23:17
8	Adam Rankin	0.19 s	Kotlin	2023-09-10 06:03:25
9	J Z	0.20 s	Kotlin	2018-06-23 22:55:28
10	Fubin Luan	0.20 s	Kotlin	2018-06-23 23:08:29

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.01 s	Prolog	2018-11-28 13:00:59

#	User	Runtime	Language	Date
1	Christofer Ohlsson	0.03 s	Python 2	2017-09-23 15:53:48
2	Florian Kluck	0.03 s	Python 2	2018-10-11 16:54:48
3	Jesper Öqvist	0.03 s	Python 2	2018-10-29 14:41:16
4	Hermon Mulat	0.03 s	Python 2	2018-12-21 21:21:03
5	Benjamin Cradick	0.03 s	Python 2	2019-03-11 00:51:40
6	Andreas Björklund	0.03 s	Python 2	2019-05-27 05:48:29
7	Johan Lyts	0.03 s	Python 2	2019-06-02 21:52:17
8	Justin Su	0.03 s	Python 2	2019-10-01 04:29:38
9	Thomas Feld	0.03 s	Python 2	2020-02-03 10:30:04
10	Yanmarshus Bachtiar	0.03 s	Python 2	2020-09-10 05:03:57

#	User	Runtime	Language	Date
1	Marcus Dicander	0.02 s	Python 3	2017-09-19 19:25:26
2	Robert Welin-Berger	0.02 s	Python 3	2017-09-19 20:05:34
3	Lars Åström	0.02 s	Python 3	2017-09-24 18:48:26
4	Michael McEwan	0.02 s	Python 3	2017-09-25 08:09:45
5	Arnar Bjarni Arnarson	0.02 s	Python 3	2017-09-26 19:26:18
6	James Hamm	0.02 s	Python 3	2017-11-22 21:13:16
7	Amadej Gruden	0.02 s	Python 3	2018-01-28 17:58:19
8	Noah Ó Donnaile	0.02 s	Python 3	2018-04-10 20:26:33
9	Tobi Pristupin	0.02 s	Python 3	2018-06-23 18:01:24
10	Aronnax Miles	0.02 s	Python 3	2018-07-01 22:25:59

#	User	Runtime	Language	Date
1	Thomas Feld	0.06 s	Ruby	2023-02-13 14:44:18
2	Hidden user	0.06 s	Ruby	2023-07-10 23:37:17
3	Clement Oh	0.07 s	Ruby	2024-02-19 09:25:04

#	User	Runtime	Language	Date
1	Anthony Clays	0.00 s	Rust	2018-11-17 18:19:06
2	Klas af Geijerstam	0.00 s	Rust	2020-10-05 13:44:06
3	Desireé af Geijerstam	0.00 s	Rust	2020-10-12 08:04:43
4	Joshua Ji	0.00 s	Rust	2020-11-26 09:51:22
5	Bas Dirks	0.00 s	Rust	2022-01-23 22:17:48
6	Aaron Lengyel	0.00 s	Rust	2023-01-08 11:13:18
7	James Craven	0.00 s	Rust	2024-09-01 18:48:15
8	Christofer Nolander	0.04 s	Rust	2018-11-13 15:20:32

#	User	Length	Language	Date
1	Sambit Palit	371	C	2020-11-03 03:46:04
2	Mirel Cosulschi	392	C	2025-02-13 13:26:39
3	Dong Yunxing	461	C	2019-02-08 07:22:17
4	xun	537	C	2021-12-22 12:47:07
5	Anton Lyxell	616	C	2017-09-22 12:47:30
6	Miguel Müller	641	C	2017-09-22 13:58:28
7	Lars Hummelgren	641	C	2017-09-22 17:26:06
8	Stepanov Carol	798	C	2025-10-07 14:30:40
9	Akemi Izuko	916	C	2022-07-17 06:50:58
10	Nguyen Duc Thang	916	C	2022-07-20 11:27:47

#	User	Length	Language	Date
1	traxex	475	C#	2024-05-26 17:01:35
2	Martijn den Hoedt	805	C#	2018-10-11 17:08:19
3	Elias Gyll	836	C#	2022-02-13 10:06:49
4	Arek Swierczek	852	C#	2020-11-12 21:20:11
5	Razzouk Elias	853	C#	2023-01-27 10:24:04
6	Pim Agterberg	863	C#	2018-10-11 16:52:25
7	Mihai Spătariu	933	C#	2019-07-31 11:38:43
8	Turan Kutlay Künbi	1098	C#	2018-11-15 19:25:51
9	Jeremiah A. Stringer	1137	C#	2017-09-24 03:25:50
10	Ard Overkamp	1289	C#	2018-10-11 17:07:25

#	User	Length	Language	Date
1	Way Tan	279	C++	2018-12-03 20:00:13
2	H. Christina	283	C++	2023-03-01 06:36:44
3	Grae Yeandle	288	C++	2021-02-24 20:40:13
4	David Sun	299	C++	2025-07-16 05:22:13
5	hoang nguyen	308	C++	2023-10-28 16:59:29
6	Qianlang Chen	314	C++	2022-09-27 02:49:49
7	右可可	318	C++	2021-08-24 11:03:06
8	Christian Yongwhan Lim	322	C++	2023-06-11 02:38:50
9	Björn Thorén	332	C++	2017-09-19 18:49:24
10	Pin-Shao Chen	336	C++	2022-01-18 10:35:38

#	User	Length	Language	Date
1	Hidden user	284	Common Lisp	2019-07-27 23:30:12

#	User	Length	Language	Date
1	Matthew Kennedy	1498	F#	2025-11-22 21:07:39

#	User	Length	Language	Date
1	Junsong Yang	834	Go	2019-09-27 18:04:55
2	Norbert Voelker	987	Go	2021-09-12 23:54:19

#	User	Length	Language	Date
1	Bjarki Baldursson Harksen	278	Haskell	2022-10-28 16:56:04
2	Mason Barnhill	313	Haskell	2023-08-09 23:17:52
3	Frank Rodriguez	457	Haskell	2020-05-18 07:32:38
4	Steinar Simonnes	653	Haskell	2024-06-13 11:43:23
5	Brent Yorgey	688	Haskell	2018-06-02 22:54:33
6	Jeremy Schmidt	763	Haskell	2020-05-16 23:45:46
7	David King	1010	Haskell	2020-03-05 12:49:00
8	Maximilian Chen	1417	Haskell	2023-06-23 17:25:01

#	User	Length	Language	Date
1	Doug Goodman	418	Java	2018-05-22 19:56:58
2	Christopher Stephens	473	Java	2018-11-03 07:56:13
3	Eric Leow Yu Quan	475	Java	2021-01-06 07:23:25
4	Rishabh Goel	503	Java	2024-04-06 22:07:01
5	Dylan Lyon	506	Java	2018-11-03 16:31:39
6	Frank Ruskey	513	Java	2018-10-09 02:18:27
7	Hidden user	521	Java	2018-11-29 10:58:07
8	Malte Larsson	525	Java	2017-09-22 16:16:21
9	Åke Wettergren	525	Java	2017-09-22 16:20:34
10	Kabir M	534	Java	2020-04-28 03:41:35

#	User	Length	Language	Date
1	Ram Basnet	799	JavaScript (Node.js)	2018-10-25 20:20:23
2	Carl Sundvall	1455	JavaScript (Node.js)	2018-11-13 10:11:36

#	User	Length	Language	Date
1	Evan Magill	181	JavaScript (SpiderMonkey)	2024-10-12 20:32:48
2	Zach Tschetter	310	JavaScript (SpiderMonkey)	2023-06-13 16:46:22
3	Christian Pilegaard Cederquist	363	JavaScript (SpiderMonkey)	2023-06-04 15:52:37
4	Bjørn Chr. Soltvedt	705	JavaScript (SpiderMonkey)	2017-09-23 22:10:31
5	Piotr Karpala	2462	JavaScript (SpiderMonkey)	2018-10-28 02:35:04

#	User	Length	Language	Date
1	Timothy Gaede	322	Julia	2024-05-26 08:38:59

#	User	Length	Language	Date
1	Jonathan Keane	371	Kotlin	2023-05-11 14:10:01
2	Sam Keyser	374	Kotlin	2023-05-10 19:14:54
3	Phường Lên	395	Kotlin	2019-11-28 17:22:59
4	Sergey Jakobsen	422	Kotlin	2021-07-20 21:43:51
5	J Z	516	Kotlin	2018-06-23 22:57:38
6	Adrian Wireklint	577	Kotlin	2022-02-13 11:38:51
7	Fubin Luan	591	Kotlin	2018-06-23 23:08:29
8	Dayan Ruben Gonzalez	628	Kotlin	2020-10-09 05:23:17
9	Adam Rankin	746	Kotlin	2023-09-10 06:03:25
10	Hidden user	875	Kotlin	2020-02-25 14:00:54

#	User	Length	Language	Date
1	Andriy Zyevakov	416	Prolog	2018-11-28 13:00:59

#	User	Length	Language	Date
1	Jesper Öqvist	157	Python 2	2018-10-29 14:41:16
2	Thomas Feld	179	Python 2	2020-02-03 10:30:04
3	Andreas Björklund	216	Python 2	2019-05-27 05:48:29
4	Florian Kluck	237	Python 2	2018-10-11 16:54:48
5	Justin Su	252	Python 2	2019-10-01 04:29:38
6	Hermon Mulat	297	Python 2	2018-12-21 21:21:03
7	Benjamin Cradick	310	Python 2	2019-03-11 00:51:40
8	Yanmarshus Bachtiar	311	Python 2	2020-09-10 05:03:57
9	Christofer Ohlsson	313	Python 2	2017-09-23 15:53:48
10	Johan Lyts	450	Python 2	2019-06-02 21:52:17

#	User	Length	Language	Date
1	Benjamin Z White	104	Python 3	2023-05-14 22:04:31
2	Wouter Dijkstra	107	Python 3	2021-11-25 16:40:14
3	Farzam Abrishami	133	Python 3	2024-01-28 23:48:48
4	Jonathan Denning	142	Python 3	2025-11-12 20:32:45
5	Tai Tze Kin	145	Python 3	2024-05-04 11:29:39
6	Yong Mao	149	Python 3	2022-10-28 14:58:04
7	Timothy White	154	Python 3	2023-03-21 22:44:29
8	Charles Ancheta	154	Python 3	2023-04-13 02:10:19
9	Hidden user	158	Python 3	2024-08-15 22:01:37
10	Mikael Häglund	159	Python 3	2024-04-28 21:42:26

#	User	Length	Language	Date
1	Thomas Feld	87	Ruby	2023-02-13 14:44:18
2	Clement Oh	118	Ruby	2024-02-19 09:25:04
3	Hidden user	510	Ruby	2023-07-10 23:37:17

#	User	Length	Language	Date
1	Bas Dirks	768	Rust	2022-01-23 22:17:48
2	Anthony Clays	879	Rust	2018-11-17 18:19:06
3	James Craven	933	Rust	2024-09-01 18:48:15
4	Joshua Ji	1187	Rust	2020-11-26 09:51:22
5	Christofer Nolander	1431	Rust	2018-11-13 15:08:18
6	Aaron Lengyel	4818	Rust	2023-01-08 11:13:18
7	Klas af Geijerstam	5389	Rust	2020-10-05 13:44:06
8	Desireé af Geijerstam	6100	Rust	2020-10-12 08:04:43

Solution running time distribution