Problem A
Reducera graffärgning — Problem Statistics

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Submissions	64928
Accepted submissions	6442
Submission ratio	9.92%
Authors	2352
Full solves [?]	1940
Full solve Ratio	82.48%

#	User	Runtime	Language	Date
1	Arvid Jonasson	0.08 s	APL	2025-07-25 16:21:32

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	C	2017-11-08 17:42:22
2	Albin Byström	0.00 s	C	2018-03-27 12:45:39
3	Axel Lindeberg	0.00 s	C	2018-12-12 21:34:42
4	Ludvig Christensen	0.00 s	C	2019-04-02 13:44:16
5	Gustaf Blomqvist	0.00 s	C	2019-11-10 22:05:19
6	Vincent Lagerros	0.00 s	C	2023-11-10 20:37:48
7	Marcus Dicander	0.01 s	C	2016-11-12 10:58:45
8	Erik Lindström	0.01 s	C	2016-11-12 23:23:03
9	Hidden user	0.01 s	C	2016-11-14 15:36:49
10	Mikael Forsberg	0.01 s	C	2016-11-15 21:06:21

#	User	Runtime	Language	Date
1	Hidden user	0.09 s	C#	2019-04-02 21:39:25
2	Alexander Skalski	0.12 s	C#	2023-11-01 20:44:17
3	Alexander Krantz	0.13 s	C#	2021-04-13 16:07:19

#	User	Runtime	Language	Date
1	Richard Uggelberg	0.00 s	C++	2017-11-09 01:19:17
2	Hidden user	0.00 s	C++	2017-11-09 02:06:48
3	Axel Lindeberg	0.00 s	C++	2018-12-12 21:32:42
4	Gustaf Blomqvist	0.00 s	C++	2019-11-10 22:18:07
5	Maximilian Alvim de Faria	0.00 s	C++	2024-11-13 13:54:15
6	Alfred Malmström	0.00 s	C++	2024-11-13 14:00:00
7	Arvid Jonasson	0.00 s	C++	2025-07-25 23:18:55
8	Marcus Dicander	0.01 s	C++	2016-11-12 10:55:14
9	Jonas Hongisto	0.01 s	C++	2016-11-12 16:54:18
10	Hidden user	0.01 s	C++	2016-11-12 21:46:57

#	User	Runtime	Language	Date
1	Christian Stjernberg	0.08 s	COBOL	2019-11-14 23:54:43

#	User	Runtime	Language	Date
1	Victor Blix	0.01 s	Go	2023-11-03 23:50:38
2	Eugén Bevegård	0.02 s	Go	2023-11-10 15:55:25
3	Oscar Hellgren	0.04 s	Go	2025-06-06 01:21:23
4	Joakim Bäck	0.08 s	Go	2019-11-14 17:19:50
5	Lowe Bonnevier	0.09 s	Go	2021-04-08 16:03:01
6	Erik Söderlund	0.13 s	Go	2024-11-11 21:14:53
7	Carl Liljencrantz	0.15 s	Go	2025-06-09 22:32:13
8	Edvard All	0.39 s	Go	2020-11-12 17:22:40
9	Olof Gren	0.44 s	Go	2019-11-12 12:08:08
10	Eldar Zeynalli	0.45 s	Go	2019-10-28 17:29:58

#	User	Runtime	Language	Date
1	Mikael Blomstrand	0.02 s	Haskell	2016-11-12 18:26:34
2	Hidden user	0.03 s	Haskell	2018-11-07 19:09:19
3	Theo Åhfeldt	0.03 s	Haskell	2019-10-26 18:15:36
4	Anders Thuné	0.03 s	Haskell	2019-10-27 15:12:13
5	Niklas Reje	0.11 s	Haskell	2019-08-09 14:53:51
6	Simon Rosén	0.11 s	Haskell	2022-11-09 17:10:17
7	Hidden user	0.12 s	Haskell	2018-11-16 12:55:03
8	Fredrik Blomqvist	0.12 s	Haskell	2023-11-14 16:11:18
9	Eskil Queseth	0.17 s	Haskell	2021-11-17 10:37:37
10	Isaac Arvestad	0.20 s	Haskell	2017-11-17 16:35:54

#	User	Runtime	Language	Date
1	Axel Lindeberg	0.06 s	Java	2018-12-12 20:58:44
2	Henrik Mellin	0.07 s	Java	2018-12-07 02:23:25
3	Hidden user	0.09 s	Java	2018-11-07 20:30:32
4	Gustav Norén	0.11 s	Java	2018-03-28 08:21:02
5	Maxmilian Auer	0.11 s	Java	2018-06-05 17:50:25
6	Johan Wieslander	0.11 s	Java	2020-06-04 14:51:46
7	Hidden user	0.15 s	Java	2018-08-11 15:17:12
8	Alan Ihre	0.15 s	Java	2018-11-02 09:20:32
9	Love Almgren	0.15 s	Java	2018-11-09 08:58:46
10	Mattias Bergström	0.15 s	Java	2018-11-09 10:07:52

#	User	Runtime	Language	Date
1	Hidden user	0.39 s	JavaScript (Node.js)	2019-05-30 16:47:04
2	David Bardvall	0.63 s	JavaScript (Node.js)	2021-03-31 19:42:37

#	User	Runtime	Language	Date
1	Jesper Lundholm	0.66 s	Kotlin	2017-11-06 19:59:06
2	Karlo Angelic	0.73 s	Kotlin	2022-11-15 00:51:35

#	User	Runtime	Language	Date
1	Ruben Socha	0.05 s	Lua	2024-04-16 14:43:46

#	User	Runtime	Language	Date
1	Melvin Jakobsson	0.22 s	Prolog	2022-11-10 13:20:48
2	Christian Stjernberg	0.23 s	Prolog	2019-11-11 14:40:43

#	User	Runtime	Language	Date
1	Gustaf Blomqvist	0.04 s	Python 2	2019-11-12 02:00:36
2	Lara Sheik	0.04 s	Python 2	2019-11-21 15:55:45
3	Victor Alsen	0.05 s	Python 2	2019-11-08 16:57:05
4	Johan Parö	0.06 s	Python 2	2018-11-09 14:23:36
5	Alexander Kruger	0.06 s	Python 2	2019-11-06 23:58:52
6	Anushri Devarmanai	0.07 s	Python 2	2018-04-13 22:40:08
7	Nicolai Hellesnes	0.08 s	Python 2	2018-11-10 14:17:03
8	Hidden user	0.08 s	Python 2	2018-11-10 14:19:43
9	Felix Balthasar Berief	0.09 s	Python 2	2019-04-02 18:31:03
10	Özer Özkahraman	0.14 s	Python 2	2017-04-21 18:39:39

#	User	Runtime	Language	Date
1	Gustaf Blomqvist	0.02 s	Python 3	2019-11-12 01:37:24
2	Victor Alsen	0.02 s	Python 3	2019-11-20 03:15:10
3	Lara Sheik	0.02 s	Python 3	2019-11-21 15:51:10
4	Hidden user	0.04 s	Python 3	2018-10-29 11:40:09
5	David Stevens	0.05 s	Python 3	2018-11-08 21:12:51
6	Måns Andersson	0.05 s	Python 3	2019-11-08 12:38:22
7	Marcus Enström	0.05 s	Python 3	2019-11-10 13:16:43
8	Ryll Åman	0.05 s	Python 3	2023-04-20 14:43:45
9	Andy Li	0.05 s	Python 3	2024-10-27 15:38:36
10	Seema Fatima Bashir	0.05 s	Python 3	2024-11-04 22:05:52

#	User	Runtime	Language	Date
1	Sebastián Valencia Naranjo	0.06 s	Python 3 with NumPy	2025-04-11 17:47:19
2	Zhen Han	0.08 s	Python 3 with NumPy	2023-04-16 21:55:24
3	Sathvik Perkari	0.10 s	Python 3 with NumPy	2023-06-02 14:39:02
4	Maciej Grzegorz Staniszewski	0.12 s	Python 3 with NumPy	2024-04-19 15:17:28
5	Hidden user	0.12 s	Python 3 with NumPy	2024-04-20 22:54:23
6	Benoît Goupil	0.12 s	Python 3 with NumPy	2024-04-22 13:05:26
7	Anni Bäckman	0.13 s	Python 3 with NumPy	2024-04-15 18:48:24
8	Shadman Hassan	0.15 s	Python 3 with NumPy	2025-06-11 04:08:32
9	Tianji Ma	0.30 s	Python 3 with NumPy	2022-11-02 20:06:29
10	Tristan Gumbel	0.40 s	Python 3 with NumPy	2024-04-17 15:58:03

#	User	Runtime	Language	Date
1	Paul Vinell	0.08 s	Ruby	2019-10-27 13:12:12

#	User	Runtime	Language	Date
1	Axel Lindeberg	0.00 s	Rust	2019-09-15 21:18:30
2	Gustaf Blomqvist	0.00 s	Rust	2019-11-08 16:28:56
3	Isak Einberg	0.00 s	Rust	2022-11-21 16:00:07
4	Vincent Lagerros	0.00 s	Rust	2023-11-07 21:42:52
5	Oskar Nehlin	0.01 s	Rust	2018-11-13 17:04:31
6	Aleksandar Mitic	0.01 s	Rust	2018-11-13 18:02:15
7	Joel Söderman	0.01 s	Rust	2019-03-23 21:25:05
8	Markus Wesslén	0.01 s	Rust	2019-11-10 02:20:42
9	Aron Bergman	0.01 s	Rust	2021-11-22 10:42:12
10	Didrik Munther	0.01 s	Rust	2021-11-23 14:58:45

#	User	Length	Language	Date
1	Arvid Jonasson	135	APL	2025-09-06 14:26:20

#	User	Length	Language	Date
1	Leo Vainio	241	C	2022-11-20 16:32:01
2	Oscar Cusin	253	C	2022-11-19 15:01:38
3	Vincent Lagerros	306	C	2023-11-07 22:45:48
4	Vilmer Jonsson	444	C	2022-11-16 11:25:52
5	Gustaf Blomqvist	621	C	2019-11-10 21:12:54
6	Ryll Åman	628	C	2023-04-16 21:24:11
7	Viggo Kann	680	C	2022-11-07 23:49:55
8	Elin Inoue	755	C	2021-11-15 20:52:34
9	Henrik Mellin	792	C	2018-12-09 18:32:41
10	Erik Flink	816	C	2019-11-07 17:44:26

#	User	Length	Language	Date
1	Alexander Skalski	2084	C#	2023-11-01 20:44:17
2	Hidden user	3281	C#	2019-04-02 21:39:25
3	Alexander Krantz	4201	C#	2021-04-13 15:34:54

#	User	Length	Language	Date
1	Leo Vainio	270	C++	2022-11-19 17:08:18
2	Farhan Syed	429	C++	2023-10-24 17:06:28
3	Samuel Greenberg	499	C++	2023-11-06 21:30:11
4	Herman Karlsson	555	C++	2019-11-07 23:48:07
5	Nils Gustafsson	618	C++	2017-04-19 10:57:11
6	Gustaf Blomqvist	621	C++	2019-11-10 21:15:42
7	Lukas Mattsson	633	C++	2021-11-09 02:02:37
8	Albin Andréasson	662	C++	2020-11-05 13:19:14
9	Hannes Bredberg	744	C++	2018-10-11 17:23:11
10	Oskar Strömberg	813	C++	2019-11-08 11:45:52

#	User	Length	Language	Date
1	Christian Stjernberg	2401	COBOL	2019-11-14 23:54:43

#	User	Length	Language	Date
1	Leo Vainio	382	Go	2022-11-20 20:29:11
2	Edvard All	1055	Go	2020-11-12 17:22:40
3	Eldar Zeynalli	1099	Go	2019-10-30 14:17:57
4	Oscar Hellgren	1175	Go	2025-06-06 02:05:17
5	Victor Blix	1455	Go	2023-11-03 23:50:38
6	Fanny Voltaire	1594	Go	2020-11-10 10:05:44
7	Hidden user	1707	Go	2020-11-10 09:52:26
8	Eugén Bevegård	1841	Go	2023-11-10 15:55:25
9	Lowe Bonnevier	2098	Go	2021-04-08 16:03:01
10	Erik Söderlund	3017	Go	2024-11-11 21:14:53

#	User	Length	Language	Date
1	Hidden user	1059	Haskell	2018-11-04 16:19:36
2	Mikael Blomstrand	1110	Haskell	2016-11-12 18:26:34
3	Fredrik Blomqvist	1127	Haskell	2023-11-14 16:11:18
4	Eskil Queseth	1360	Haskell	2021-11-15 14:03:22
5	Hidden user	1551	Haskell	2018-11-16 12:55:03
6	Isaac Arvestad	1599	Haskell	2017-11-16 13:13:30
7	Simon Rosén	1642	Haskell	2022-11-09 17:10:17
8	Theo Åhfeldt	1723	Haskell	2019-10-26 18:15:36
9	Anders Thuné	1723	Haskell	2019-10-27 15:12:13
10	Niklas Reje	2265	Haskell	2019-08-09 15:06:24

#	User	Length	Language	Date
1	Leo Vainio	427	Java	2022-11-19 19:14:06
2	Anna Veselova	967	Java	2017-05-24 14:02:16
3	Emelie Wästlund	1109	Java	2025-06-05 14:40:42
4	Rickard Björklund	1266	Java	2017-04-06 11:22:07
5	Isabelle Hallman	1292	Java	2017-04-18 14:35:04
6	Paul Wall	1311	Java	2019-04-26 08:57:54
7	Kristin Evegård	1370	Java	2018-04-16 16:49:29
8	Ahmet Uyar	1406	Java	2019-11-13 22:58:43
9	Carl Bentzer	1442	Java	2022-11-15 11:21:07
10	Hidden user	1457	Java	2018-04-12 11:19:24

#	User	Length	Language	Date
1	David Bardvall	2373	JavaScript (Node.js)	2021-03-31 19:42:37
2	Hidden user	5479	JavaScript (Node.js)	2019-05-30 16:47:04

#	User	Length	Language	Date
1	Karlo Angelic	1903	Kotlin	2022-11-15 00:51:35
2	Jesper Lundholm	2692	Kotlin	2017-11-06 20:07:22

#	User	Length	Language	Date
1	Ruben Socha	748	Lua	2024-04-16 14:43:46

#	User	Length	Language	Date
1	Melvin Jakobsson	962	Prolog	2022-11-10 15:05:48
2	Christian Stjernberg	1960	Prolog	2019-11-11 16:00:44

#	User	Length	Language	Date
1	Victor Alsen	532	Python 2	2019-11-08 16:57:05
2	Gustaf Blomqvist	600	Python 2	2019-11-12 02:00:36
3	Lara Sheik	840	Python 2	2019-11-21 15:55:45
4	Felix Balthasar Berief	866	Python 2	2019-04-02 18:31:03
5	Johan Parö	1258	Python 2	2018-11-09 14:58:56
6	Hidden user	1583	Python 2	2018-11-10 14:19:43
7	Nicolai Hellesnes	1585	Python 2	2018-11-10 14:17:03
8	Robin Gunning	1605	Python 2	2016-11-16 21:12:41
9	Samuel Stenberg	1872	Python 2	2017-04-14 01:57:23
10	Anushri Devarmanai	1877	Python 2	2018-04-13 22:40:08

#	User	Length	Language	Date
1	Elias Lundell	141	Python 3	2025-04-01 23:28:25
2	Eskil Nyberg	142	Python 3	2025-04-02 11:46:18
3	Isak Nyberg	152	Python 3	2023-10-13 11:55:16
4	Ismael Parada	166	Python 3	2024-01-29 20:25:42
5	Ryll Åman	193	Python 3	2023-04-15 18:38:45
6	Patrik Magnus Johansson	272	Python 3	2022-11-13 09:52:39
7	Leo Vainio	279	Python 3	2022-11-18 10:52:46
8	Mathias Magnusson	295	Python 3	2023-11-15 20:22:42
9	Alex Gunnarsson	334	Python 3	2023-11-17 12:14:04
10	Hannes Hallqvist	335	Python 3	2021-11-11 15:49:25

#	User	Length	Language	Date
1	Jesper Qvick	360	Python 3 with NumPy	2024-04-09 10:53:47
2	Nils Forsgren	883	Python 3 with NumPy	2023-04-28 16:23:53
3	Sathvik Perkari	1083	Python 3 with NumPy	2023-06-02 14:39:02
4	Zeyang Kong	1335	Python 3 with NumPy	2025-03-24 18:32:36
5	Hidden user	1404	Python 3 with NumPy	2024-04-20 22:54:23
6	Paula Schembri	1413	Python 3 with NumPy	2024-04-22 08:59:33
7	Tianji Ma	1443	Python 3 with NumPy	2022-11-02 20:06:29
8	Anni Bäckman	1480	Python 3 with NumPy	2024-04-15 18:48:24
9	Maciej Grzegorz Staniszewski	1627	Python 3 with NumPy	2024-04-19 15:17:28
10	Benoît Goupil	1659	Python 3 with NumPy	2024-04-22 14:43:06

#	User	Length	Language	Date
1	Paul Vinell	825	Ruby	2019-10-27 13:12:12

#	User	Length	Language	Date
1	Vincent Lagerros	441	Rust	2023-11-07 22:53:18
2	Isak Einberg	643	Rust	2022-11-14 20:48:11
3	Azeez Daoud	891	Rust	2023-11-07 21:34:36
4	Elias Rilegård	1210	Rust	2024-04-16 17:34:44
5	Gustaf Blomqvist	1299	Rust	2019-11-08 16:40:57
6	Melvin Jakobsson	1377	Rust	2022-11-08 23:28:14
7	Samuel Falk	1461	Rust	2021-11-18 15:37:58
8	Edvard All	1492	Rust	2020-11-12 15:42:26
9	Markus Wesslén	1523	Rust	2019-11-08 13:35:41
10	Hidden user	1542	Rust	2025-04-08 19:13:47

Solution running time distribution