Problem I
Robot Protection — Problem Statistics

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Submissions	2508
Accepted submissions	1152
Submission ratio	45.93%
Authors	728
Full solves [?]	661
Full solve Ratio	90.80%

#	User	Runtime	Language	Date
1	Alexander Bilde Pedersen	0.03 s	C	2023-03-26 15:23:05
2	Oskar	0.05 s	C	2019-08-30 07:58:01
3	Ioannis Br	0.05 s	C	2020-03-15 02:23:42
4	Jón Steinn Elíasson	0.05 s	C	2020-05-06 04:02:32
5	arda atci	0.05 s	C	2020-09-10 23:56:04
6	Nick Hargrove	0.05 s	C	2022-05-29 01:29:50
7	Quân Anh	0.05 s	C	2024-04-02 00:49:22
8	Mirel Cosulschi	0.05 s	C	2024-07-20 14:57:36
9	Pim Heeman	0.08 s	C	2020-03-18 20:22:26
10	Bergur Snorrason	0.22 s	C	2020-10-16 18:23:07

#	User	Runtime	Language	Date
1	Carlos Palacios	0.17 s	C#	2025-05-09 03:48:24
2	Hidden user	0.20 s	C#	2018-04-20 16:52:32
3	Victor Öman	0.21 s	C#	2017-05-24 16:30:43
4	Hidden user	0.22 s	C#	2017-03-19 23:30:48
5	Rafael Steffen Nguyen Jensen	0.23 s	C#	2025-04-26 15:04:54
6	Frida Sjögren	0.25 s	C#	2018-08-06 15:05:26
7	Edvin Mako	0.37 s	C#	2020-05-09 16:57:58
8	Sayed Md. Atiqur Rahman	0.40 s	C#	2018-04-21 23:40:00
9	Basile Van Hoorick	0.52 s	C#	2019-09-14 22:33:09

#	User	Runtime	Language	Date
1	Donald Dong	0.02 s	C++	2018-04-30 08:15:06
2	Kenneth Langedal	0.02 s	C++	2019-04-09 14:08:07
3	Hidden user	0.02 s	C++	2019-07-18 09:42:42
4	Victor Song	0.02 s	C++	2023-06-26 23:16:31
5	Hidden user	0.02 s	C++	2024-12-12 03:39:34
6	Kevin Chevalier	0.03 s	C++	2019-07-25 19:51:10
7	Oskar	0.03 s	C++	2019-09-16 18:44:58
8	Alexander Kravberg	0.03 s	C++	2023-07-22 21:47:05
9	Lin Lee	0.04 s	C++	2017-03-10 15:11:14
10	Muhammad Irham Rasyidi	0.04 s	C++	2018-04-06 21:57:03

#	User	Runtime	Language	Date
1	Hallgrímur Jónas Jensson	0.87 s	F#	2024-05-05 21:16:21

#	User	Runtime	Language	Date
1	amund lindberg	0.28 s	Haskell	2019-04-30 00:39:23
2	Hidden user	1.13 s	Haskell	2023-01-15 15:28:44
3	Daniel Brännvall	1.14 s	Haskell	2023-06-25 21:12:52
4	Ryan Yates	1.15 s	Haskell	2019-11-12 21:49:20
5	Stian	1.19 s	Haskell	2020-04-18 01:18:31
6	Brent Yorgey	1.50 s	Haskell	2018-06-06 04:23:34

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.18 s	Java	2022-11-23 21:38:45
2	Ranjith M	0.30 s	Java	2024-07-07 00:23:57
3	Jakob Kallestad	0.31 s	Java	2019-04-09 20:58:04
4	Sebastian Donnum	0.36 s	Java	2020-05-08 18:32:07
5	Emily Hoppe	0.37 s	Java	2021-12-01 00:50:40
6	Karl Michelsen	0.41 s	Java	2022-05-07 15:32:12
7	Mehdi Maick	0.44 s	Java	2018-04-12 11:18:42
8	Kristoffer Borgstrøm	0.46 s	Java	2021-04-06 19:17:49
9	Axel Nilsson	0.48 s	Java	2023-06-30 12:28:02
10	Bjørn Dons	0.50 s	Java	2018-12-30 20:10:08

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.28 s	JavaScript (SpiderMonkey)	2023-05-02 14:25:50
2	Jimmy Gustafsson	0.35 s	JavaScript (SpiderMonkey)	2022-06-23 08:54:43
3	Bjørn Chr. Soltvedt	0.45 s	JavaScript (SpiderMonkey)	2018-05-04 02:23:42
4	Alexander Borodach	0.71 s	JavaScript (SpiderMonkey)	2018-02-13 07:07:37
5	Sardar Batofi	0.71 s	JavaScript (SpiderMonkey)	2018-05-25 16:04:14

#	User	Runtime	Language	Date
1	Timothy Gaede	1.27 s	Julia	2024-06-29 04:46:57

#	User	Runtime	Language	Date
1	Ditlef Alexander Diseth	0.84 s	Kotlin	2020-04-15 13:05:43
2	Nicholas Johnson	0.89 s	Kotlin	2020-03-12 05:00:04
3	Neil Harmon	1.40 s	Kotlin	2019-07-23 12:24:11

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.05 s	Pascal	2019-01-07 08:17:42

#	User	Runtime	Language	Date
1	Anders Larsson	0.51 s	PHP	2020-03-29 22:34:47
2	Markus Weller	0.71 s	PHP	2019-03-14 15:17:17

#	User	Runtime	Language	Date
1	Ocram Esah	0.13 s	Python 2	2022-04-21 19:22:12
2	Andrew Kronser	0.34 s	Python 2	2017-10-18 17:26:38
3	Ram Basnet	0.38 s	Python 2	2019-01-05 23:10:01
4	Johan Lyts	0.42 s	Python 2	2020-12-23 15:21:21
5	Young Leon	0.43 s	Python 2	2017-01-20 18:32:41
6	Maj Stenmark	0.43 s	Python 2	2019-01-15 21:05:03
7	Lars Åström	0.44 s	Python 2	2019-06-03 19:34:45
8	Andreas Björklund	0.46 s	Python 2	2020-10-24 07:48:11
9	Thomas Feld	0.47 s	Python 2	2019-09-17 10:53:43

#	User	Runtime	Language	Date
1	Ocram Esah	0.13 s	Python 3	2022-06-06 10:22:51
2	Kadin Matotek	0.14 s	Python 3	2025-06-07 16:07:35
3	Jens Reimers	0.17 s	Python 3	2022-06-23 12:08:04
4	Andrew Godbout	0.19 s	Python 3	2020-10-08 15:40:36
5	Greg Vance	0.19 s	Python 3	2023-04-19 08:02:43
6	Floris Cnossen	0.21 s	Python 3	2022-05-04 13:09:10
7	Yong Mao	0.23 s	Python 3	2024-04-19 04:55:56
8	Elisha Fast	0.23 s	Python 3	2025-02-24 22:24:49
9	Magnus Lillerønning Aune	0.26 s	Python 3	2024-05-07 12:06:29
10	Liz Smith	0.29 s	Python 3	2023-11-20 23:22:43

#	User	Runtime	Language	Date
1	Alexander Bilde Pedersen	0.74 s	Ruby	2023-03-21 01:31:06

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.01 s	Rust	2025-05-01 16:03:20
2	Stian Soltvedt	0.02 s	Rust	2019-04-29 12:05:40
3	Malthe Mathias Mølgaard Larsen	0.02 s	Rust	2023-03-20 18:49:23
4	Ole Vik Lysne	0.02 s	Rust	2024-04-23 16:55:41
5	Melker Forsberg	0.04 s	Rust	2023-06-23 16:58:08
6	gard heine kalland	0.04 s	Rust	2024-05-08 17:42:16
7	Isak Jägberg	0.05 s	Rust	2023-04-04 10:26:47
8	Bas Dirks	0.05 s	Rust	2024-01-17 15:52:14
9	Akemi Izuko	0.06 s	Rust	2022-10-27 01:49:37
10	Albert Rise Nielsen	0.06 s	Rust	2023-03-14 18:01:47

#	User	Length	Language	Date
1	Mirel Cosulschi	2065	C	2024-07-20 14:57:36
2	Oskar	2158	C	2019-08-29 22:08:01
3	Pim Heeman	2555	C	2020-03-18 20:22:26
4	arda atci	2719	C	2020-09-10 23:56:04
5	Jón Steinn Elíasson	2759	C	2020-05-06 04:02:32
6	Alexander Bilde Pedersen	2847	C	2023-03-19 01:07:25
7	Bergur Snorrason	2978	C	2020-10-16 18:23:07
8	Nick Hargrove	3157	C	2022-05-29 01:29:50
9	Quân Anh	3529	C	2024-04-02 00:49:22
10	Ioannis Br	3702	C	2020-03-15 02:23:42

#	User	Length	Language	Date
1	Carlos Palacios	2537	C#	2025-05-09 03:48:24
2	Basile Van Hoorick	3044	C#	2019-09-14 22:33:09
3	Sayed Md. Atiqur Rahman	3090	C#	2018-04-21 23:40:00
4	Frida Sjögren	3906	C#	2018-08-06 15:05:26
5	Edvin Mako	4407	C#	2020-05-09 16:57:58
6	Rafael Steffen Nguyen Jensen	4641	C#	2025-04-26 15:04:54
7	Hidden user	4911	C#	2018-04-20 16:52:32
8	Hidden user	7487	C#	2017-03-19 23:30:48
9	Victor Öman	8364	C#	2017-05-24 16:30:43

#	User	Length	Language	Date
1	人外沙耶	949	C++	2020-12-19 04:35:49
2	William Gan	1068	C++	2016-04-20 07:19:26
3	Elias Lolck	1082	C++	2021-03-04 15:03:14
4	Johan Wind	1094	C++	2018-05-06 23:45:26
5	Hidden user	1137	C++	2021-07-29 21:16:42
6	Ragur Krishnan	1212	C++	2018-01-04 01:10:43
7	Yeung Man Tsung	1264	C++	2023-01-01 06:24:39
8	Hidden user	1282	C++	2019-06-05 19:11:33
9	Ernest Ng Zi Xuan	1284	C++	2024-06-07 12:19:13
10	Chris Vilches	1302	C++	2024-10-25 04:06:06

#	User	Length	Language	Date
1	Hallgrímur Jónas Jensson	2050	F#	2024-03-27 14:22:54

#	User	Length	Language	Date
1	Ryan Yates	1001	Haskell	2019-11-12 21:49:20
2	Stian	1163	Haskell	2020-04-18 01:18:31
3	Hidden user	1201	Haskell	2023-01-15 15:28:44
4	amund lindberg	1977	Haskell	2019-04-30 00:39:23
5	Daniel Brännvall	2147	Haskell	2023-06-25 21:12:52
6	Brent Yorgey	5710	Haskell	2018-06-06 04:23:34

#	User	Length	Language	Date
1	Doug Goodman	1524	Java	2018-04-22 20:08:19
2	Joel Gritter	2124	Java	2020-10-01 06:52:16
3	polimed	2129	Java	2024-04-06 23:01:53
4	Amidala Hoffmén	2268	Java	2025-03-27 15:36:29
5	Daniel S	2331	Java	2021-09-23 05:02:26
6	Isaac Lee	2437	Java	2020-06-22 03:38:28
7	long phan	2512	Java	2018-08-17 06:16:16
8	Frederik Buur	2724	Java	2025-03-14 13:34:19
9	Tobias Hamerslag	2797	Java	2018-05-14 15:39:26
10	Marc Dominic San Pedro	2825	Java	2023-06-19 10:40:55

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	1466	JavaScript (SpiderMonkey)	2018-05-04 02:23:42
2	Alexander Borodach	1822	JavaScript (SpiderMonkey)	2018-02-13 07:07:37
3	Sardar Batofi	1828	JavaScript (SpiderMonkey)	2018-05-25 16:13:35
4	Jimmy Gustafsson	2518	JavaScript (SpiderMonkey)	2022-06-23 08:54:43
5	Christian Pilegaard Cederquist	3777	JavaScript (SpiderMonkey)	2023-05-02 14:25:50

#	User	Length	Language	Date
1	Timothy Gaede	3284	Julia	2024-06-29 04:46:57

#	User	Length	Language	Date
1	Nicholas Johnson	2957	Kotlin	2020-03-12 04:46:06
2	Neil Harmon	3135	Kotlin	2019-07-23 12:24:11
3	Ditlef Alexander Diseth	4730	Kotlin	2020-04-15 13:05:43

#	User	Length	Language	Date
1	Ingemar Ragnemalm	2718	Pascal	2019-01-07 08:17:42

#	User	Length	Language	Date
1	Markus Weller	1679	PHP	2019-03-14 15:17:17
2	Anders Larsson	2572	PHP	2020-03-29 22:34:47

#	User	Length	Language	Date
1	Thomas Feld	826	Python 2	2019-09-17 10:53:43
2	Andreas Björklund	951	Python 2	2020-10-24 07:48:11
3	Lars Åström	1081	Python 2	2019-06-03 19:34:45
4	Maj Stenmark	1218	Python 2	2019-01-15 21:05:03
5	Andrew Kronser	1229	Python 2	2017-10-18 17:26:38
6	Johan Lyts	1233	Python 2	2020-12-23 14:22:32
7	Ocram Esah	1268	Python 2	2022-04-21 19:22:12
8	Jesper Öqvist	1556	Python 2	2018-10-28 16:49:23
9	Ram Basnet	1607	Python 2	2019-01-05 23:10:01

#	User	Length	Language	Date
1	Simon Hellsten	286	Python 3	2023-06-28 18:41:08
2	Noah Hessen Bjerke	518	Python 3	2025-11-08 20:45:37
3	Nino Bašić	588	Python 3	2023-01-07 18:46:33
4	Lex Janssens	720	Python 3	2025-10-07 10:45:47
5	Thøger Bro	733	Python 3	2024-03-14 00:17:31
6	Hidden user	757	Python 3	2023-06-28 13:37:37
7	Nicholas Russell Saerang	831	Python 3	2023-06-29 23:57:55
8	Kristian Nore	858	Python 3	2024-05-07 13:53:18
9	Hidden user	903	Python 3	2023-03-26 21:48:42
10	Jesús Pacheco Alonso	905	Python 3	2025-10-20 09:55:21

#	User	Length	Language	Date
1	Alexander Bilde Pedersen	342	Ruby	2023-03-21 14:31:43

#	User	Length	Language	Date
1	gard heine kalland	2213	Rust	2024-05-08 17:42:16
2	Ole Vik Lysne	2408	Rust	2024-04-23 16:57:33
3	Albert Rise Nielsen	2439	Rust	2023-03-14 18:01:47
4	Isak Jägberg	3362	Rust	2023-04-04 10:26:47
5	Bas Dirks	3395	Rust	2024-01-17 15:52:14
6	Malthe Mathias Mølgaard Larsen	3623	Rust	2023-03-20 18:59:01
7	Melker Forsberg	3807	Rust	2023-06-25 00:19:42
8	Akemi Izuko	4216	Rust	2022-10-27 01:49:37
9	Stian Soltvedt	4250	Rust	2019-04-29 12:05:40
10	Davíð Helgason	12257	Rust	2020-04-01 01:26:50

Solution running time distribution