Problem I
Robert Hood — Problem Statistics

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Submissions	6470
Accepted submissions	1986
Submission ratio	30.70%
Authors	1505
Full solves [?]	1223
Full solve Ratio	81.26%

#	User	Runtime	Language	Date
1	Jeroen Bransen	0.02 s	C	2013-10-05 10:59:22
2	Mikael Frisk	0.02 s	C	2018-04-12 14:17:19
3	Ivan Petrov	0.02 s	C	2019-07-09 07:55:54
4	EGGIE WU	0.02 s	C	2021-11-20 22:07:13
5	Ola Lundqvist	0.03 s	C	2014-10-02 20:11:48
6	Stefan Kennedy	0.03 s	C	2017-01-08 21:19:07
7	Ioannis Br	0.03 s	C	2020-03-16 01:26:25
8	Nick Hargrove	0.03 s	C	2022-05-30 01:16:48
9	Mirel Cosulschi	0.03 s	C	2024-07-20 13:53:07
10	Josef Van V	0.04 s	C	2026-03-08 04:30:26

#	User	Runtime	Language	Date
1	Peter Bohunský	0.16 s	C#	2017-11-17 21:27:28
2	Alexei Potter	0.16 s	C#	2025-11-01 21:02:47
3	Piotr Karpala	0.17 s	C#	2015-09-08 22:12:15
4	Apurav Khare	0.18 s	C#	2021-10-18 03:46:08
5	Hidden user	0.23 s	C#	2017-10-06 15:44:32
6	Farbror Bieber	0.24 s	C#	2014-10-02 18:13:13
7	Rebecca Staffas	0.26 s	C#	2021-10-25 06:11:40
8	grabarz	0.28 s	C#	2014-09-21 14:58:31
9	Bas te Kolste	0.32 s	C#	2013-10-05 18:55:11
10	r0x3r	0.73 s	C#	2014-10-01 22:02:56

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

#	User	Runtime	Language	Date
1	Morten Lohne	0.67 s	Haskell	2017-04-18 14:56:32

#	User	Runtime	Language	Date
1	Hà Minh Ngọc	0.09 s	Java	2015-11-07 02:26:32
2	Jan Štola	0.21 s	Java	2015-06-04 09:40:24
3	Luu Nhat Phi	0.26 s	Java	2015-11-07 07:49:42
4	William Fiset	0.27 s	Java	2016-07-31 02:21:58
5	Andreas Jansson	0.31 s	Java	2016-10-05 12:22:02
6	Bjørn Dons	0.31 s	Java	2018-12-30 06:01:16
7	Eskil Jarlskog	0.32 s	Java	2016-10-06 11:12:27
8	Mohamed El Zarei	0.38 s	Java	2016-09-10 20:14:53
9	David Brink	0.38 s	Java	2016-09-11 11:23:23
10	Nick Wu	0.39 s	Java	2015-10-06 10:59:04

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.21 s	JavaScript (SpiderMonkey)	2023-07-06 22:48:49
2	Bjørn Chr. Soltvedt	0.35 s	JavaScript (SpiderMonkey)	2016-04-29 11:28:35

#	User	Runtime	Language	Date
1	Albin Heimerson	0.77 s	Julia	2023-09-22 21:16:48

#	User	Runtime	Language	Date
1	Phường Lên	0.66 s	Kotlin	2020-05-03 04:53:25
2	Nicholas Johnson	0.82 s	Kotlin	2022-05-27 14:30:22
3	Liu Yuhang	1.93 s	Kotlin	2025-04-09 11:39:52

#	User	Runtime	Language	Date
1	Joel Newman	0.15 s	OCaml	2023-11-17 22:30:17

#	User	Runtime	Language	Date
1	Hidden user	0.17 s	Python 2	2013-10-06 20:17:29
2	Harry Smidt	0.18 s	Python 2	2019-10-18 09:53:54
3	Knut Anders Stokke	0.19 s	Python 2	2017-04-18 15:29:38
4	Marcus Johansson	0.20 s	Python 2	2013-10-10 17:51:02
5	Hidden user	0.32 s	Python 2	2018-05-19 19:03:04
6	Maj Stenmark	0.32 s	Python 2	2018-05-19 19:03:54
7	Sivasankaran D	0.32 s	Python 2	2026-03-12 01:42:52
8	Kasper Borys	0.33 s	Python 2	2017-05-06 03:42:15
9	Måns Magnusson	0.33 s	Python 2	2018-06-19 23:52:29
10	Jacky Dai	0.33 s	Python 2	2021-06-24 12:14:07

#	User	Runtime	Language	Date
1	Gustavo Fadel	0.14 s	Python 3	2021-03-20 22:55:35
2	Julie Hodneland	0.15 s	Python 3	2024-04-27 14:29:40
3	Dimitri Przybylski	0.16 s	Python 3	2021-05-17 12:29:56
4	Erling Bratli	0.24 s	Python 3	2024-04-20 14:33:43
5	Benjamin Hartwick	0.25 s	Python 3	2024-11-21 01:09:19
6	Efe Ertugrul	0.26 s	Python 3	2023-11-20 22:57:17
7	Alan Hu	0.27 s	Python 3	2024-11-20 21:50:49
8	Daniela Simonelli	0.27 s	Python 3	2025-11-21 00:51:26
9	Hidden user	0.28 s	Python 3	2025-04-24 09:07:47
10	Thomas Savage-Duguay	0.28 s	Python 3	2025-11-19 21:02:23

#	User	Runtime	Language	Date
1	Casper Christensen	1.02 s	Ruby	2016-03-10 17:22:30

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.01 s	Rust	2025-07-24 23:53:45
2	Artur Khuziakhmetov	0.01 s	Rust	2025-11-03 15:37:01
3	Yoeri Otten	0.02 s	Rust	2022-10-05 15:32:18
4	Iwancof	0.02 s	Rust	2023-06-26 15:51:38
5	Ole Vik Lysne	0.02 s	Rust	2024-04-23 23:03:00
6	Klas af Geijerstam	0.03 s	Rust	2020-10-10 14:53:37
7	gard heine kalland	0.03 s	Rust	2024-05-07 13:12:05
8	藤原潮人	0.05 s	Rust	2023-06-27 10:16:31

#	User	Length	Language	Date
1	Jeroen Bransen	982	C	2013-10-05 10:59:22
2	Ivan Petrov	1042	C	2019-07-09 07:55:54
3	Lasse Melbye	1072	C	2014-10-02 11:57:21
4	Tran Tuong Minh Nguyen	1116	C	2018-02-14 08:00:08
5	EGGIE WU	1120	C	2021-11-20 22:21:58
6	Wael Al Saeed	1226	C	2014-07-19 01:03:20
7	Josef Van V	1482	C	2026-03-08 04:30:26
8	Stefan Kennedy	1926	C	2017-01-08 21:19:07
9	Ola Lundqvist	1928	C	2014-10-02 20:11:48
10	Ioannis Br	2534	C	2024-07-14 21:16:53

#	User	Length	Language	Date
1	r0x3r	1011	C#	2014-10-01 21:53:34
2	Alexei Potter	2512	C#	2025-11-01 21:07:03
3	Peter Bohunský	2612	C#	2017-11-17 21:27:28
4	Farbror Bieber	3091	C#	2014-10-02 18:13:13
5	Rebecca Staffas	3283	C#	2021-10-25 06:11:40
6	Hidden user	4579	C#	2017-10-06 15:44:32
7	Apurav Khare	4926	C#	2021-10-18 03:46:08
8	Piotr Karpala	6182	C#	2015-09-08 22:12:15
9	Bas te Kolste	12073	C#	2013-10-05 18:55:11
10	grabarz	12613	C#	2014-09-21 14:58:31

#	User	Length	Language	Date
1	Ziqian Zhong	645	C++	2022-05-27 14:05:56
2	Lim An Jun	668	C++	2023-01-19 04:54:33
3	Pedro Shinzato Chen	677	C++	2021-03-29 00:24:00
4	Aaryan Prakash	689	C++	2023-05-27 16:21:48
5	Nick Wu	696	C++	2023-05-27 15:50:12
6	Jacob Steinebronn	700	C++	2023-05-27 16:10:27
7	Giovanni Gaio	757	C++	2022-01-03 13:58:29
8	Giovanni Gaio	758	C++	2022-10-22 12:17:35
9	Luiz Oda	781	C++	2019-10-03 00:04:05
10	Colin Galen	782	C++	2023-05-27 16:03:26

#	User	Length	Language	Date
1	Morten Lohne	2681	Haskell	2017-04-18 14:56:32

#	User	Length	Language	Date
1	Arup Ratan Guha	1220	Java	2023-05-27 15:44:55
2	Andreas Oppebøen	1227	Java	2013-10-06 15:10:29
3	Andreas Jansson	1299	Java	2016-10-05 12:22:02
4	Eskil Jarlskog	1299	Java	2016-10-06 11:12:27
5	Hidden user	1378	Java	2022-06-23 08:44:09
6	Måns Magnusson	1415	Java	2016-04-19 16:54:35
7	Darrin Wiley	1523	Java	2019-04-10 20:14:09
8	Evan Michael Bailey	1616	Java	2022-06-23 17:00:46
9	Luu Nhat Phi	2038	Java	2015-11-07 07:49:42
10	Sagnik Biswas	2101	Java	2024-09-25 04:09:58

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	1622	JavaScript (SpiderMonkey)	2016-04-25 19:34:13
2	Christian Pilegaard Cederquist	3981	JavaScript (SpiderMonkey)	2023-07-06 22:48:49

#	User	Length	Language	Date
1	Albin Heimerson	2137	Julia	2023-09-22 21:16:48

#	User	Length	Language	Date
1	Phường Lên	1977	Kotlin	2020-05-03 04:53:25
2	Nicholas Johnson	2311	Kotlin	2022-05-27 14:30:22
3	Liu Yuhang	2835	Kotlin	2025-04-09 11:39:52

#	User	Length	Language	Date
1	Joel Newman	10143	OCaml	2023-11-17 22:30:17

#	User	Length	Language	Date
1	Hidden user	712	Python 2	2013-10-06 20:17:29
2	Måns Magnusson	759	Python 2	2018-06-19 23:52:29
3	Lars Åström	830	Python 2	2018-10-24 10:31:56
4	Björn Magnusson	830	Python 2	2018-11-02 21:15:28
5	Jonatan Nilsson	830	Python 2	2018-12-02 17:43:35
6	Hidden user	988	Python 2	2018-05-19 19:03:04
7	Maj Stenmark	988	Python 2	2018-05-19 19:03:54
8	Sivasankaran D	1073	Python 2	2026-03-12 01:42:52
9	Anton Lyxell	1077	Python 2	2019-12-01 06:39:04
10	Kasper Borys	1256	Python 2	2017-05-06 03:42:15

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

#	User	Length	Language	Date
1	Casper Christensen	914	Ruby	2016-03-10 17:22:30

#	User	Length	Language	Date
1	Artur Khuziakhmetov	1201	Rust	2025-11-04 08:05:42
2	gard heine kalland	2165	Rust	2024-05-07 13:12:05
3	Ole Vik Lysne	2538	Rust	2024-04-24 08:36:08
4	Yoeri Otten	3881	Rust	2022-10-05 15:32:18
5	Klas af Geijerstam	8835	Rust	2020-10-10 14:53:37
6	Vincent Lagerros	13894	Rust	2024-05-09 17:51:29
7	Iwancof	59466	Rust	2023-06-26 15:51:38
8	藤原潮人	59941	Rust	2023-06-27 10:16:31

Solution running time distribution