Problem I
Robert Hood — Problem Statistics

Back to problem description

Submissions	6366
Accepted submissions	1945
Submission ratio	30.55%
Authors	1475
Full solves [?]	1191
Full solve Ratio	80.75%

#	User	Runtime	Language	Date
1	Jeroen Bransen	0.02 s	C	2013-10-05 12:59:22
2	Mikael Frisk	0.02 s	C	2018-04-12 16:17:19
3	Ivan Petrov	0.02 s	C	2019-07-09 09:55:54
4	EGGIE WU	0.02 s	C	2021-11-20 23:07:13
5	Ola Lundqvist	0.03 s	C	2014-10-02 22:11:48
6	Stefan Kennedy	0.03 s	C	2017-01-08 22:19:07
7	Ioannis Br	0.03 s	C	2020-03-16 02:26:25
8	Nick Hargrove	0.03 s	C	2022-05-30 03:16:48
9	Mirel Cosulschi	0.03 s	C	2024-07-20 15:53:07
10	Lasse Melbye	0.15 s	C	2014-10-02 13:57:21

#	User	Runtime	Language	Date
1	Peter Bohunský	0.16 s	C#	2017-11-17 22:27:28
2	Alexei Potter	0.16 s	C#	2025-11-01 22:02:47
3	Piotr Karpala	0.17 s	C#	2015-09-09 00:12:15
4	Apurav Khare	0.18 s	C#	2021-10-18 05:46:08
5	Hidden user	0.23 s	C#	2017-10-06 17:44:32
6	Farbror Bieber	0.24 s	C#	2014-10-02 20:13:13
7	Rebecca Staffas	0.26 s	C#	2021-10-25 08:11:40
8	grabarz	0.28 s	C#	2014-09-21 16:58:31
9	Bas te Kolste	0.32 s	C#	2013-10-05 20:55:11
10	r0x3r	0.73 s	C#	2014-10-02 00:02:56

#	User	Runtime	Language	Date
1	Fu Yong Quah	0.02 s	C++	2015-04-13 06:21:24
2	Fredrik Hernqvist	0.02 s	C++	2015-10-20 15:26:15
3	Hidden user	0.02 s	C++	2016-10-03 15:32:36
4	Håkon Tjeldnes	0.02 s	C++	2017-05-04 18:51:56
5	Mikal Naustdal	0.02 s	C++	2017-05-07 14:30:12
6	Hidden user	0.02 s	C++	2017-08-16 10:21:24
7	Benjamin Qi	0.02 s	C++	2017-10-11 13:40:55
8	Antoni Guz	0.02 s	C++	2018-02-13 22:13:30
9	Wang Zhi Jian	0.02 s	C++	2018-04-11 14:43:51
10	Dmitry Lyubshin	0.02 s	C++	2018-04-23 09:08:09

#	User	Runtime	Language	Date
1	Morten Lohne	0.67 s	Haskell	2017-04-18 16:56:32

#	User	Runtime	Language	Date
1	Hà Minh Ngọc	0.09 s	Java	2015-11-07 03:26:32
2	Jan Štola	0.21 s	Java	2015-06-04 11:40:24
3	Luu Nhat Phi	0.26 s	Java	2015-11-07 08:49:42
4	William Fiset	0.27 s	Java	2016-07-31 04:21:58
5	Andreas Jansson	0.31 s	Java	2016-10-05 14:22:02
6	Bjørn Dons	0.31 s	Java	2018-12-30 07:01:16
7	Eskil Jarlskog	0.32 s	Java	2016-10-06 13:12:27
8	Mohamed El Zarei	0.38 s	Java	2016-09-10 22:14:53
9	David Brink	0.38 s	Java	2016-09-11 13:23:23
10	Nick Wu	0.39 s	Java	2015-10-06 12:59:04

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.21 s	JavaScript (SpiderMonkey)	2023-07-07 00:48:49
2	Bjørn Chr. Soltvedt	0.35 s	JavaScript (SpiderMonkey)	2016-04-29 13:28:35

#	User	Runtime	Language	Date
1	Albin Heimerson	0.77 s	Julia	2023-09-22 23:16:48

#	User	Runtime	Language	Date
1	Phường Lên	0.66 s	Kotlin	2020-05-03 06:53:25
2	Nicholas Johnson	0.82 s	Kotlin	2022-05-27 16:30:22
3	Liu Yuhang	1.93 s	Kotlin	2025-04-09 13:39:52

#	User	Runtime	Language	Date
1	Joel Newman	0.15 s	OCaml	2023-11-17 23:30:17

#	User	Runtime	Language	Date
1	Hidden user	0.17 s	Python 2	2013-10-06 22:17:29
2	Harry Smidt	0.18 s	Python 2	2019-10-18 11:53:54
3	Knut Anders Stokke	0.19 s	Python 2	2017-04-18 17:29:38
4	Marcus Johansson	0.20 s	Python 2	2013-10-10 19:51:02
5	Hidden user	0.32 s	Python 2	2018-05-19 21:03:04
6	Maj Stenmark	0.32 s	Python 2	2018-05-19 21:03:54
7	Kasper Borys	0.33 s	Python 2	2017-05-06 05:42:15
8	Måns Magnusson	0.33 s	Python 2	2018-06-20 01:52:29
9	Jacky Dai	0.33 s	Python 2	2021-06-24 14:14:07
10	Lars Åström	0.34 s	Python 2	2018-10-24 12:31:56

#	User	Runtime	Language	Date
1	Gustavo Fadel	0.14 s	Python 3	2021-03-20 23:55:35
2	Julie Hodneland	0.15 s	Python 3	2024-04-27 16:29:40
3	Dimitri Przybylski	0.16 s	Python 3	2021-05-17 14:29:56
4	Erling Bratli	0.24 s	Python 3	2024-04-20 16:33:43
5	Benjamin Hartwick	0.25 s	Python 3	2024-11-21 02:09:19
6	Efe Ertugrul	0.26 s	Python 3	2023-11-20 23:57:17
7	Alan Hu	0.27 s	Python 3	2024-11-20 22:50:49
8	Daniela Simonelli	0.27 s	Python 3	2025-11-21 01:51:26
9	Hidden user	0.28 s	Python 3	2025-04-24 11:07:47
10	Thomas Savage-Duguay	0.28 s	Python 3	2025-11-19 22:02:23

#	User	Runtime	Language	Date
1	Casper Christensen	1.02 s	Ruby	2016-03-10 18:22:30

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.01 s	Rust	2025-07-25 01:53:45
2	Artur Khuziakhmetov	0.01 s	Rust	2025-11-03 16:37:01
3	Yoeri Otten	0.02 s	Rust	2022-10-05 17:32:18
4	Iwancof	0.02 s	Rust	2023-06-26 17:51:38
5	Ole Vik Lysne	0.02 s	Rust	2024-04-24 01:03:00
6	Klas af Geijerstam	0.03 s	Rust	2020-10-10 16:53:37
7	gard heine kalland	0.03 s	Rust	2024-05-07 15:12:05
8	藤原潮人	0.05 s	Rust	2023-06-27 12:16:31

#	User	Length	Language	Date
1	Jeroen Bransen	982	C	2013-10-05 12:59:22
2	Ivan Petrov	1042	C	2019-07-09 09:55:54
3	Lasse Melbye	1072	C	2014-10-02 13:57:21
4	Tran Tuong Minh Nguyen	1116	C	2018-02-14 09:00:08
5	EGGIE WU	1120	C	2021-11-20 23:21:58
6	Wael Al Saeed	1226	C	2014-07-19 03:03:20
7	Stefan Kennedy	1926	C	2017-01-08 22:19:07
8	Ola Lundqvist	1928	C	2014-10-02 22:11:48
9	Ioannis Br	2534	C	2024-07-14 23:16:53
10	Mirel Cosulschi	2570	C	2024-07-20 15:53:07

#	User	Length	Language	Date
1	r0x3r	1011	C#	2014-10-01 23:53:34
2	Alexei Potter	2512	C#	2025-11-01 22:07:03
3	Peter Bohunský	2612	C#	2017-11-17 22:27:28
4	Farbror Bieber	3091	C#	2014-10-02 20:13:13
5	Rebecca Staffas	3283	C#	2021-10-25 08:11:40
6	Hidden user	4579	C#	2017-10-06 17:44:32
7	Apurav Khare	4926	C#	2021-10-18 05:46:08
8	Piotr Karpala	6182	C#	2015-09-09 00:12:15
9	Bas te Kolste	12073	C#	2013-10-05 20:55:11
10	grabarz	12613	C#	2014-09-21 16:58:31

#	User	Length	Language	Date
1	Ziqian Zhong	645	C++	2022-05-27 16:05:56
2	Lim An Jun	668	C++	2023-01-19 05:54:33
3	Pedro Shinzato Chen	677	C++	2021-03-29 02:24:00
4	Aaryan Prakash	689	C++	2023-05-27 18:21:48
5	Nick Wu	696	C++	2023-05-27 17:50:12
6	Jacob Steinebronn	700	C++	2023-05-27 18:10:27
7	Giovanni Gaio	757	C++	2022-01-03 14:58:29
8	Giovanni Gaio	758	C++	2022-10-22 14:17:35
9	Luiz Oda	781	C++	2019-10-03 02:04:05
10	Colin Galen	782	C++	2023-05-27 18:03:26

#	User	Length	Language	Date
1	Morten Lohne	2681	Haskell	2017-04-18 16:56:32

#	User	Length	Language	Date
1	Arup Ratan Guha	1220	Java	2023-05-27 17:44:55
2	Andreas Oppebøen	1227	Java	2013-10-06 17:10:29
3	Andreas Jansson	1299	Java	2016-10-05 14:22:02
4	Eskil Jarlskog	1299	Java	2016-10-06 13:12:27
5	Hidden user	1378	Java	2022-06-23 10:44:09
6	Måns Magnusson	1415	Java	2016-04-19 18:54:35
7	Darrin Wiley	1523	Java	2019-04-10 22:14:09
8	Evan Michael Bailey	1616	Java	2022-06-23 19:00:46
9	Luu Nhat Phi	2038	Java	2015-11-07 08:49:42
10	Sagnik Biswas	2101	Java	2024-09-25 06:09:58

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	1622	JavaScript (SpiderMonkey)	2016-04-25 21:34:13
2	Christian Pilegaard Cederquist	3981	JavaScript (SpiderMonkey)	2023-07-07 00:48:49

#	User	Length	Language	Date
1	Albin Heimerson	2137	Julia	2023-09-22 23:16:48

#	User	Length	Language	Date
1	Phường Lên	1977	Kotlin	2020-05-03 06:53:25
2	Nicholas Johnson	2311	Kotlin	2022-05-27 16:30:22
3	Liu Yuhang	2835	Kotlin	2025-04-09 13:39:52

#	User	Length	Language	Date
1	Joel Newman	10143	OCaml	2023-11-17 23:30:17

#	User	Length	Language	Date
1	Hidden user	712	Python 2	2013-10-06 22:17:29
2	Måns Magnusson	759	Python 2	2018-06-20 01:52:29
3	Lars Åström	830	Python 2	2018-10-24 12:31:56
4	Björn Magnusson	830	Python 2	2018-11-02 22:15:28
5	Jonatan Nilsson	830	Python 2	2018-12-02 18:43:35
6	Hidden user	988	Python 2	2018-05-19 21:03:04
7	Maj Stenmark	988	Python 2	2018-05-19 21:03:54
8	Anton Lyxell	1077	Python 2	2019-12-01 07:39:04
9	Kasper Borys	1256	Python 2	2017-05-06 05:42:15
10	Jesper Öqvist	1542	Python 2	2018-05-15 02:49:15

#	User	Length	Language	Date
1	Julie Hodneland	504	Python 3	2024-04-27 16:37:16
2	James Bryan Francisco	536	Python 3	2025-07-08 12:09:56
3	Daniel Yang	619	Python 3	2023-05-27 22:58:20
4	Abiram Gangavaram	659	Python 3	2023-05-27 18:31:50
5	Sam Chen	691	Python 3	2025-11-15 17:26:10
6	Erling Bratli	716	Python 3	2024-04-20 16:33:43
7	Kristian Nore	752	Python 3	2024-05-07 14:00:44
8	Casper Rysgaard	770	Python 3	2022-05-23 09:45:26
9	Dilhan Salgado	772	Python 3	2023-05-27 18:09:29
10	Saad Zellag	811	Python 3	2024-11-27 01:04:44

#	User	Length	Language	Date
1	Casper Christensen	914	Ruby	2016-03-10 18:22:30

#	User	Length	Language	Date
1	Artur Khuziakhmetov	1201	Rust	2025-11-04 09:05:42
2	gard heine kalland	2165	Rust	2024-05-07 15:12:05
3	Ole Vik Lysne	2538	Rust	2024-04-24 10:36:08
4	Yoeri Otten	3881	Rust	2022-10-05 17:32:18
5	Klas af Geijerstam	8835	Rust	2020-10-10 16:53:37
6	Vincent Lagerros	13894	Rust	2024-05-09 19:51:29
7	Iwancof	59466	Rust	2023-06-26 17:51:38
8	藤原潮人	59941	Rust	2023-06-27 12:16:31

Solution running time distribution