Problem A
Prozor — Problem Statistics

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Submissions	2970
Accepted submissions	1615
Submission ratio	54.38%
Authors	1454
Full solves [?]	1373
Full solve Ratio	94.43%

#	User	Runtime	Language	Date
1	Andreas Jansson	0.00 s	C	2017-02-03 01:28:00
2	Hidden user	0.00 s	C	2017-07-21 11:19:13
3	Bernd Schmidt	0.00 s	C	2017-08-11 22:30:05
4	Hidden user	0.00 s	C	2017-12-04 04:42:58
5	Ayoub Chegraoui	0.00 s	C	2018-01-07 00:08:34
6	Rasmus Bruhn Nielsen	0.00 s	C	2019-01-15 08:43:11
7	Matthew Williams	0.00 s	C	2024-01-29 15:58:54
8	Mirel Cosulschi	0.00 s	C	2024-04-07 17:05:17
9	Gael David Ruiz Ñurinda	0.00 s	C	2025-11-18 20:03:15
10	Thomas	0.01 s	C	2018-08-21 15:30:45

#	User	Runtime	Language	Date
1	Kunwei Zhang	0.02 s	C#	2018-02-28 10:25:29
2	Johan Pettersson	0.03 s	C#	2018-04-16 21:06:34
3	Faisal Rahman	0.04 s	C#	2017-11-28 11:02:47
4	Thomas Norris	0.04 s	C#	2019-06-20 07:10:18
5	Andreas Ljungberg	0.04 s	C#	2019-06-27 19:29:54
6	Leslie Yip	0.04 s	C#	2022-07-26 15:09:10
7	Eric Bäckhage	0.05 s	C#	2019-02-13 21:53:48
8	DE	0.05 s	C#	2019-04-22 22:16:42
9	Fredrik Stigsson	0.05 s	C#	2019-05-18 11:32:32
10	Risto Kaunisto	0.05 s	C#	2019-07-25 13:08:13

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Common Lisp	2020-12-16 05:47:50

#	User	Runtime	Language	Date
1	Patrick Bahr	0.09 s	F#	2021-02-21 17:04:37

#	User	Runtime	Language	Date
1	Jinwoo Lee	0.09 s	Go	2018-12-26 17:45:21
2	Norbert Voelker	0.11 s	Go	2021-04-14 21:55:33

#	User	Runtime	Language	Date
1	Håkon Flatval	0.01 s	Haskell	2018-08-19 00:25:02
2	Hidden user	0.01 s	Haskell	2019-08-13 11:29:42
3	Steinar Simonnes	0.01 s	Haskell	2024-02-16 15:50:27
4	Udo Stenzel	0.01 s	Haskell	2025-06-30 11:18:50
5	Fabian Mitterwallner	0.01 s	Haskell	2025-10-12 23:32:26
6	Brilliant Misalayuk	0.01 s	Haskell	2026-01-06 21:46:53
7	TJ Takei	0.01 s	Haskell	2026-01-09 10:33:16
8	Andrés Marzal Varó	0.05 s	Haskell	2020-10-12 12:38:48
9	Jan Hrček	0.05 s	Haskell	2020-10-24 14:49:38
10	Øyvind Almli	0.06 s	Haskell	2021-09-14 00:22:04

#	User	Runtime	Language	Date
1	LEE DE EN	0.04 s	Java	2024-08-31 09:30:55
2	Daryl Ghee Shao Wen	0.05 s	Java	2024-08-29 16:07:11
3	Brent Yorgey	0.06 s	Java	2017-11-18 05:18:03
4	Steven Cheng	0.06 s	Java	2017-11-18 17:48:37
5	José Vander Meulen	0.06 s	Java	2018-10-09 16:48:27
6	Fabio	0.06 s	Java	2024-03-12 04:45:08
7	Taras Romanyuk	0.06 s	Java	2024-05-08 19:15:11
8	Bala Krishna	0.06 s	Java	2024-08-20 19:34:09
9	Foong Hong Yi	0.06 s	Java	2024-09-18 14:18:48
10	Hidden user	0.07 s	Java	2021-02-18 12:49:30

#	User	Runtime	Language	Date
1	Gurpartap Singh Bhatti	0.08 s	JavaScript (Node.js)	2019-02-26 06:47:19
2	Hidden user	0.08 s	JavaScript (Node.js)	2024-08-28 20:43:08
3	Camilo Aparecido Ferri Moreira	0.15 s	JavaScript (Node.js)	2018-08-25 03:38:30
4	Chris Wong	0.45 s	JavaScript (Node.js)	2021-02-06 03:41:07
5	Andoko Chandra	0.47 s	JavaScript (Node.js)	2020-10-07 17:36:44
6	John	0.48 s	JavaScript (Node.js)	2020-08-08 08:21:42

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.03 s	JavaScript (SpiderMonkey)	2016-04-28 00:17:22
2	Peter Kedemo	0.04 s	JavaScript (SpiderMonkey)	2017-06-18 01:31:43
3	Peter Menyes	0.05 s	JavaScript (SpiderMonkey)	2021-02-10 09:22:02
4	Jimmy Gustafsson	0.05 s	JavaScript (SpiderMonkey)	2024-07-18 21:19:16
5	Luk Ming Kit	0.06 s	JavaScript (SpiderMonkey)	2019-01-29 03:27:52
6	Christian Pilegaard Cederquist	0.06 s	JavaScript (SpiderMonkey)	2023-01-07 18:21:01
7	Zach Tschetter	0.06 s	JavaScript (SpiderMonkey)	2023-06-24 05:44:21

#	User	Runtime	Language	Date
1	Timothy Gaede	0.75 s	Julia	2024-06-12 18:37:03

#	User	Runtime	Language	Date
1	Adam Koprowski	0.28 s	Kotlin	2020-10-07 21:41:02
2	Adam Rankin	0.28 s	Kotlin	2023-05-11 21:13:18
3	Neil Harmon	0.29 s	Kotlin	2019-04-08 16:35:06

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.02 s	Pascal	2017-08-09 15:05:59

#	User	Runtime	Language	Date
1	Emil Riis Hansen	0.36 s	PHP	2018-10-30 15:56:05
2	Petr Trofimov	0.89 s	PHP	2021-04-23 10:44:41

#	User	Runtime	Language	Date
1	Andreas Björklund	0.04 s	Python 2	2019-08-18 13:40:06
2	Jesper Öqvist	0.06 s	Python 2	2018-10-20 10:49:10
3	Lars Åström	0.06 s	Python 2	2019-06-18 13:53:37
4	Haggai Liu	0.07 s	Python 2	2017-06-08 03:08:57
5	Abdul Zakkar	0.07 s	Python 2	2017-08-16 06:18:06
6	Mark Kaius Helenurm	0.07 s	Python 2	2018-09-03 07:55:16
7	Johann Ly	0.08 s	Python 2	2018-04-16 05:06:44
8	Lim Hong Hui Eugene	0.08 s	Python 2	2018-04-25 08:38:59
9	Johan Lyts	0.08 s	Python 2	2019-07-03 14:35:05
10	Måns Magnusson	0.08 s	Python 2	2019-08-30 23:13:11

#	User	Runtime	Language	Date
1	Cian Ruane	0.02 s	Python 3	2018-02-20 12:59:04
2	Nguyen Anh Vu	0.03 s	Python 3	2017-08-02 06:32:19
3	Hidden user	0.03 s	Python 3	2018-09-21 22:33:18
4	Alex Wice	0.03 s	Python 3	2018-11-19 05:29:34
5	Atli Fannar Franklín	0.03 s	Python 3	2019-04-09 12:37:04
6	Ryan Berthold	0.03 s	Python 3	2019-05-21 02:56:29
7	Luke Smith	0.03 s	Python 3	2019-07-19 06:49:39
8	Prateek Bhakta	0.03 s	Python 3	2019-11-01 02:51:50
9	Ulrich Goertz	0.05 s	Python 3	2017-08-16 22:10:02
10	Massimo Meneghello	0.05 s	Python 3	2018-12-17 19:00:20

#	User	Runtime	Language	Date
1	Felipe Marchi	0.06 s	Ruby	2022-01-14 22:53:39
2	Macdara mac an tSionnaigh	0.88 s	Ruby	2019-10-01 22:17:04
3	Hidden user	0.98 s	Ruby	2019-10-01 21:27:45

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Rust	2025-11-19 09:21:45
2	Brad Glaser	0.01 s	Rust	2018-11-15 00:45:10
3	Loïc CARR	0.01 s	Rust	2018-12-16 23:13:53
4	Anthony Audoin	0.01 s	Rust	2021-01-23 16:16:48
5	David Rasch	0.01 s	Rust	2021-02-16 17:17:24
6	Freek van Keulen	0.01 s	Rust	2021-07-17 08:56:29
7	Eric Pinter	0.01 s	Rust	2021-11-26 04:49:08
8	Bas Dirks	0.01 s	Rust	2022-01-03 11:48:31
9	Simon Lixenfeld	0.01 s	Rust	2022-09-09 23:04:33
10	Anthony Helsel	0.01 s	Rust	2023-07-21 11:03:43

#	User	Length	Language	Date
1	PhilCampbell	1068	C	2020-12-29 10:39:30
2	Ximun Castoreo	1099	C	2020-11-23 09:57:48
3	Matthew Weston	1104	C	2022-01-17 18:03:05
4	Ayoub Chegraoui	1206	C	2018-01-07 00:08:34
5	Donikon Fajar	1261	C	2018-11-15 04:58:15
6	Gael David Ruiz Ñurinda	1310	C	2025-11-18 20:03:15
7	Emil Wihlander	1323	C	2020-11-29 03:05:51
8	Mirel Cosulschi	1326	C	2024-04-07 17:05:17
9	Alex Van Keulen	1482	C	2018-09-17 17:49:08
10	Jeviczki Jane	1500	C	2025-11-24 23:32:10

#	User	Length	Language	Date
1	Göran Andersson	1355	C#	2022-05-13 18:10:52
2	Kunwei Zhang	1549	C#	2018-02-28 10:25:29
3	Leslie Yip	1598	C#	2022-07-26 15:09:10
4	Thomas Norris	1809	C#	2019-06-20 07:10:18
5	Esty Crow	1997	C#	2024-07-19 16:47:41
6	Anthony Ye	2226	C#	2024-08-09 21:10:41
7	Faisal Rahman	2608	C#	2017-11-28 11:02:47
8	Eric Bäckhage	2629	C#	2019-02-13 21:53:48
9	Johan Pettersson	3480	C#	2018-04-16 21:06:34
10	DE	4053	C#	2019-04-22 22:16:42

#	User	Length	Language	Date
1	a_b__c	672	C++	2021-04-01 18:20:12
2	Frederick Pek	711	C++	2021-06-03 09:20:40
3	Ji Kim	728	C++	2020-07-15 04:17:31
4	Hidden user	757	C++	2020-02-29 21:24:09
5	Johan Wind	791	C++	2018-04-05 09:10:21
6	Mugeon Kim	805	C++	2024-06-13 05:08:34
7	Rafael Kristoforus Yanto	836	C++	2025-01-31 10:40:22
8	Andres Leonel Juarez Careaga	847	C++	2020-09-21 21:50:53
9	Ritul Kumar Singh	854	C++	2024-05-04 17:04:29
10	Matias Nova Baza	861	C++	2024-05-03 22:50:33

#	User	Length	Language	Date
1	Hidden user	5448	Common Lisp	2020-12-16 05:47:50

#	User	Length	Language	Date
1	Patrick Bahr	2781	F#	2021-02-21 17:04:37

#	User	Length	Language	Date
1	Jinwoo Lee	1271	Go	2018-12-26 17:45:21
2	Norbert Voelker	1560	Go	2021-04-14 21:55:33

#	User	Length	Language	Date
1	Udo Stenzel	1041	Haskell	2025-06-30 11:18:50
2	Andrés Marzal Varó	1279	Haskell	2020-10-12 12:38:48
3	Brilliant Misalayuk	1307	Haskell	2026-01-06 21:46:53
4	Jan Hrček	1402	Haskell	2020-10-24 14:49:38
5	Øyvind Almli	1410	Haskell	2021-09-14 00:22:04
6	Fabian Mitterwallner	1750	Haskell	2025-10-12 23:32:26
7	Nazarii Bardiuk	1886	Haskell	2018-12-28 02:37:27
8	Hidden user	1980	Haskell	2019-08-13 11:29:42
9	Håkon Flatval	2102	Haskell	2018-08-19 00:25:02
10	Matthew Johnson	2297	Haskell	2019-05-15 05:00:08

#	User	Length	Language	Date
1	Doug Goodman	1055	Java	2018-04-08 18:04:10
2	Caeden Whitaker	1111	Java	2020-07-05 22:03:55
3	Carter Henderson	1116	Java	2022-02-28 17:53:59
4	Prakash Sanyasi	1119	Java	2018-10-12 17:41:44
5	Kevin Kauffman	1141	Java	2022-01-02 21:36:09
6	Emilie Hyslop	1158	Java	2021-01-01 03:34:06
7	Mark van Helvoort	1166	Java	2018-09-20 15:16:16
8	Anand Iyer	1258	Java	2019-01-24 05:52:28
9	Tram Nguyen	1379	Java	2019-10-31 23:13:56
10	Austin Girouard	1395	Java	2019-03-10 05:21:16

#	User	Length	Language	Date
1	Hidden user	1594	JavaScript (Node.js)	2023-11-17 05:24:14
2	Chris Wong	1612	JavaScript (Node.js)	2021-02-06 03:41:07
3	Andoko Chandra	1996	JavaScript (Node.js)	2020-10-07 17:36:44
4	John	2063	JavaScript (Node.js)	2020-08-08 08:21:42
5	Gurpartap Singh Bhatti	2427	JavaScript (Node.js)	2019-02-26 06:47:19
6	Camilo Aparecido Ferri Moreira	2581	JavaScript (Node.js)	2018-08-25 03:38:30

#	User	Length	Language	Date
1	Jimmy Gustafsson	521	JavaScript (SpiderMonkey)	2024-07-18 21:19:16
2	Bjørn Chr. Soltvedt	821	JavaScript (SpiderMonkey)	2016-04-28 00:17:22
3	Christian Pilegaard Cederquist	1142	JavaScript (SpiderMonkey)	2023-01-07 18:21:01
4	Zach Tschetter	1231	JavaScript (SpiderMonkey)	2023-06-24 05:44:21
5	Luk Ming Kit	1248	JavaScript (SpiderMonkey)	2019-01-29 03:27:52
6	Peter Menyes	1314	JavaScript (SpiderMonkey)	2021-02-10 09:22:02
7	Peter Kedemo	1437	JavaScript (SpiderMonkey)	2017-06-18 01:31:43

#	User	Length	Language	Date
1	Timothy Gaede	1894	Julia	2024-06-12 18:37:03

#	User	Length	Language	Date
1	Adam Koprowski	1660	Kotlin	2020-10-07 21:41:02
2	Adam Rankin	1948	Kotlin	2023-05-11 21:13:18
3	Neil Harmon	2422	Kotlin	2019-04-08 16:35:06

#	User	Length	Language	Date
1	Ingemar Ragnemalm	1244	Pascal	2017-08-09 15:05:59

#	User	Length	Language	Date
1	Petr Trofimov	1572	PHP	2021-04-23 10:44:41
2	Emil Riis Hansen	2012	PHP	2018-10-30 15:56:05

#	User	Length	Language	Date
1	Thomas Feld	406	Python 2	2019-08-29 16:12:39
2	Haggai Liu	692	Python 2	2017-06-08 03:08:57
3	Lim Hong Hui Eugene	692	Python 2	2018-04-25 08:38:59
4	Andreas Björklund	698	Python 2	2019-08-18 13:40:06
5	Lars Åström	718	Python 2	2019-06-18 13:53:37
6	Johan Lyts	757	Python 2	2019-07-03 14:35:05
7	Maj Stenmark	771	Python 2	2020-03-29 23:30:31
8	João Pedro Alvito	804	Python 2	2018-03-30 14:53:33
9	Jesper Öqvist	820	Python 2	2018-10-20 10:49:10
10	Måns Magnusson	913	Python 2	2019-08-30 23:13:11

#	User	Length	Language	Date
1	Adam Levav	346	Python 3	2023-01-25 02:23:04
2	Thomas Feld	361	Python 3	2022-11-14 12:37:40
3	Ahmed Chamseddine	382	Python 3	2024-07-25 17:53:11
4	Thibault Raffaillac	403	Python 3	2023-08-03 14:07:22
5	Charles Ancheta	425	Python 3	2023-04-12 08:46:09
6	Christofer Ohlsson	459	Python 3	2022-09-29 21:23:00
7	Kenneth Jensen	495	Python 3	2022-07-13 17:55:53
8	Vedran Čačić	499	Python 3	2019-01-15 07:18:19
9	Yong Mao	513	Python 3	2023-07-17 17:56:30
10	Tistou	543	Python 3	2021-11-18 09:02:58

#	User	Length	Language	Date
1	Hidden user	669	Ruby	2019-10-01 21:27:45
2	Macdara mac an tSionnaigh	780	Ruby	2019-10-01 22:17:04
3	Felipe Marchi	1220	Ruby	2022-01-14 22:53:39

#	User	Length	Language	Date
1	Artur Khuziakhmetov	1293	Rust	2025-12-23 17:20:53
2	David Rasch	1313	Rust	2021-02-16 17:17:24
3	David Zacek	1819	Rust	2021-05-25 02:04:42
4	Kok Dith	2081	Rust	2021-08-08 07:03:20
5	Eric Pinter	2094	Rust	2021-11-26 04:49:08
6	Anthony Helsel	2143	Rust	2023-07-21 11:03:43
7	Simon Lixenfeld	2171	Rust	2022-09-09 23:04:33
8	Loïc CARR	2178	Rust	2018-12-16 23:13:53
9	Anthony Audoin	2246	Rust	2021-01-23 16:16:48
10	Hidden user	2256	Rust	2025-11-19 09:21:45

Solution running time distribution