Problem A
Arm Coordination — Problem Statistics

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Submissions	2320
Accepted submissions	1378
Submission ratio	59.40%
Authors	1300
Full solves [?]	1225
Full solve Ratio	94.23%

#	User	Runtime	Language	Date
1	Sebastian Banert	0.00 s	Ada	2024-10-26 23:48:34

#	User	Runtime	Language	Date
1	Danny Robinson	0.01 s	Bash	2023-09-04 13:08:04

#	User	Runtime	Language	Date
1	Adrian Bay Dorph	0.02 s	C#	2021-11-26 15:22:26
2	Mikael Fiala-Lundström	0.02 s	C#	2021-11-28 10:20:49
3	Henrik Hallbert	0.02 s	C#	2022-03-12 11:29:58
4	Eric Weiss	0.02 s	C#	2022-07-22 20:37:24
5	Maykal Droshev	0.04 s	C#	2023-06-28 17:25:38
6	Benjamin Bilbeau	0.04 s	C#	2023-12-12 16:20:23
7	traxex	0.04 s	C#	2024-05-10 12:44:41
8	Russell Rios	0.05 s	C#	2024-09-24 23:26:52
9	Rowan Gomanee	0.05 s	C#	2024-10-25 14:21:47
10	Michael Damsgaard	0.05 s	C#	2024-11-29 22:37:43

#	User	Runtime	Language	Date
1	Jesper Bengtson	0.04 s	F#	2021-11-26 15:48:00
2	Jacob Harris Cryer Kragh	0.04 s	F#	2022-06-18 06:34:27
3	Krzys Hejno	0.08 s	F#	2025-02-05 17:07:58

#	User	Runtime	Language	Date
1	Norbert Voelker	0.08 s	Go	2021-11-17 19:53:48
2	Albert Rise Nielsen	0.08 s	Go	2021-11-26 15:24:25
3	Lukas L. Hjelmstrand	0.08 s	Go	2021-11-26 15:26:03
4	Niclas Søgaard Hjortkjær	0.08 s	Go	2021-11-26 15:26:23

#	User	Runtime	Language	Date
1	Ng Tek In	0.00 s	Haskell	2022-08-11 08:27:57
2	Lars Corbijn	0.00 s	Haskell	2022-09-19 19:04:37
3	Jan Hrček	0.00 s	Haskell	2022-11-13 09:52:47
4	Sebastian Banert	0.00 s	Haskell	2023-09-25 19:27:22
5	Hidden user	0.00 s	Haskell	2023-10-02 08:27:44
6	Charley Sheaffer	0.00 s	Haskell	2023-10-31 20:11:46
7	Steinar Simonnes	0.00 s	Haskell	2024-01-21 12:18:27
8	Brent Yorgey	0.01 s	Haskell	2021-11-19 11:15:33
9	Rudy Matela	0.01 s	Haskell	2024-04-22 08:18:46

#	User	Runtime	Language	Date
1	Nathaniel Lahn	0.04 s	Java	2025-02-26 03:28:42
2	Lee Heng Sheng	0.05 s	Java	2024-04-27 13:25:47
3	Asmus Tørsleff	0.06 s	Java	2021-11-26 16:19:53
4	Crystal Sharpe	0.06 s	Java	2021-12-05 03:20:45
5	Sven Rönnbäck	0.06 s	Java	2021-12-10 18:21:01
6	Marcus Peh	0.06 s	Java	2022-01-18 07:29:40
7	Simen Eggebø	0.06 s	Java	2022-02-28 11:39:02
8	Liam Keliher	0.06 s	Java	2022-04-24 11:11:55
9	Bowen Yang	0.06 s	Java	2023-08-25 02:54:03
10	Julius Griebel	0.06 s	Java	2023-12-29 18:33:01

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	JavaScript (Node.js)	2024-07-02 19:30:18
2	Nikola Stojkovski	0.08 s	JavaScript (Node.js)	2022-08-15 08:54:21
3	John	0.09 s	JavaScript (Node.js)	2022-08-19 07:40:37
4	Niamh Limerick	0.42 s	JavaScript (Node.js)	2022-02-21 00:28:48
5	Chris Wong	0.42 s	JavaScript (Node.js)	2022-03-15 16:12:59

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.02 s	JavaScript (SpiderMonkey)	2021-11-16 11:09:12
2	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-01-10 15:52:49
3	Evan Magill	0.02 s	JavaScript (SpiderMonkey)	2024-04-20 06:08:09
4	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-06-14 21:39:53

#	User	Runtime	Language	Date
1	Timothy Gaede	0.57 s	Julia	2024-03-27 12:07:16
2	Danny Robinson	0.72 s	Julia	2023-09-04 13:07:27

#	User	Runtime	Language	Date
1	Nicholas Johnson	0.12 s	Kotlin	2022-02-21 03:48:40
2	Jacob Huebner	0.13 s	Kotlin	2022-02-22 22:03:01
3	Emil Wihlander	0.18 s	Kotlin	2023-07-27 11:37:10
4	Adam Rankin	0.19 s	Kotlin	2023-08-25 03:35:03
5	Troy Warmboe	0.19 s	Kotlin	2023-12-21 21:38:38
6	Martijn Muijsers	0.20 s	Kotlin	2024-05-30 19:18:09

#	User	Runtime	Language	Date
1	Zeheng Li	0.00 s	Lua	2023-12-11 22:30:21

#	User	Runtime	Language	Date
1	David Connolly	0.00 s	Pascal	2021-11-17 10:35:33
2	Ingemar Ragnemalm	0.00 s	Pascal	2021-12-11 10:40:13

#	User	Runtime	Language	Date
1	Renate	0.01 s	PHP	2023-07-20 22:19:53

#	User	Runtime	Language	Date
1	Hasan Kalzi	0.02 s	Python 2	2022-06-17 13:42:54
2	Yanmarshus Bachtiar	0.03 s	Python 2	2021-11-27 11:49:08
3	Andreas Björklund	0.03 s	Python 2	2022-01-22 19:37:32
4	Johan Lyts	0.03 s	Python 2	2022-04-19 19:45:17

#	User	Runtime	Language	Date
1	Henry Xia	0.04 s	Python 3	2022-06-06 05:03:20
2	Petr	0.04 s	Python 3	2022-06-06 16:57:44
3	Hasan Kalzi	0.04 s	Python 3	2022-06-17 13:43:32
4	Arnav Sastry	0.04 s	Python 3	2022-06-24 03:11:49
5	Josh Askin	0.04 s	Python 3	2022-07-02 15:41:41
6	Jaga Saju	0.04 s	Python 3	2022-07-02 17:30:15
7	laur	0.04 s	Python 3	2022-07-03 00:45:01
8	Dean Gregory	0.04 s	Python 3	2022-07-08 17:52:10
9	Constantijn Dekker	0.04 s	Python 3	2022-07-09 09:58:13
10	Kattis Speedrun	0.04 s	Python 3	2022-07-22 10:45:57

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	Ruby	2021-11-27 22:11:28
2	Nikola Stojkovski	0.05 s	Ruby	2022-08-15 09:16:59
3	Saado, E. (Eli, Student B-CS)	0.06 s	Ruby	2022-09-23 20:57:49
4	Thomas Feld	0.06 s	Ruby	2022-11-16 12:26:38

#	User	Length	Language	Date
1	Sebastian Banert	468	Ada	2024-10-26 23:48:34

#	User	Length	Language	Date
1	Danny Robinson	76	Bash	2023-09-04 13:08:04

#	User	Length	Language	Date
1	Martin Blom	110	C	2023-10-30 13:46:21
2	R.P. Gerner	158	C	2024-09-30 13:52:18
3	Adrians Formanickis	196	C	2025-09-17 14:21:31
4	Allan Nouri	199	C	2023-11-14 08:39:54
5	林良承	201	C	2024-09-11 02:54:32
6	紅茶	224	C	2023-08-27 22:55:19
7	Szymon Kucharski	227	C	2022-02-16 15:15:59
8	Jeroen Jongkees	229	C	2023-04-12 19:24:37
9	Mikael K Eriksson	239	C	2021-11-26 17:49:16
10	潘治均	244	C	2023-10-29 08:43:20

#	User	Length	Language	Date
1	traxex	304	C#	2024-05-10 12:44:41
2	Eric Weiss	563	C#	2022-07-22 20:37:24
3	Umar Rasyid	634	C#	2025-06-28 05:37:46
4	Rowan Gomanee	710	C#	2024-10-25 14:21:47
5	Dennis Stegnell	727	C#	2025-03-08 06:48:16
6	Benjamin Bilbeau	809	C#	2023-12-12 16:20:23
7	Maykal Droshev	893	C#	2023-06-28 17:25:38
8	Russell Rios	980	C#	2024-09-24 23:26:52
9	Adrian Bay Dorph	1100	C#	2021-11-26 15:22:26
10	Mikael Fiala-Lundström	1139	C#	2021-11-28 10:15:19

#	User	Length	Language	Date
1	Jonas Rouven Schoenauer	154	C++	2023-10-24 00:07:22
2	Gian Peña	191	C++	2021-11-25 09:34:58
3	yok939	198	C++	2024-02-02 14:11:46
4	Tuukka Korhonen	200	C++	2022-02-27 11:14:47
5	chiauyun weng	201	C++	2023-10-29 06:30:11
6	Dustin R	202	C++	2025-08-14 20:41:23
7	Aak	203	C++	2023-10-04 11:55:20
8	45趙郡儀Ivy	207	C++	2024-11-08 05:26:29
9	卡比獸	209	C++	2024-10-30 03:25:42
10	Grae Yeandle	211	C++	2021-11-19 16:18:49

#	User	Length	Language	Date
1	Krzys Hejno	404	F#	2025-02-05 17:07:58
2	Jacob Harris Cryer Kragh	677	F#	2022-06-18 06:34:27
3	Jesper Bengtson	1998	F#	2021-11-26 15:48:00

#	User	Length	Language	Date
1	Lukas L. Hjelmstrand	190	Go	2021-11-26 15:26:03
2	Niclas Søgaard Hjortkjær	382	Go	2021-11-26 15:26:23
3	Norbert Voelker	691	Go	2021-11-17 19:53:48
4	Albert Rise Nielsen	1525	Go	2021-11-26 15:24:25

#	User	Length	Language	Date
1	Rudy Matela	90	Haskell	2024-04-22 08:18:46
2	Brent Yorgey	117	Haskell	2021-11-19 11:15:33
3	Sebastian Banert	163	Haskell	2023-09-25 19:27:22
4	Steinar Simonnes	232	Haskell	2024-01-21 12:18:27
5	Lars Corbijn	246	Haskell	2022-09-19 19:04:37
6	Hidden user	327	Haskell	2023-10-02 08:27:44
7	Charley Sheaffer	366	Haskell	2023-10-31 20:11:46
8	Jan Hrček	443	Haskell	2022-11-13 09:52:47
9	Ng Tek In	457	Haskell	2022-08-11 08:27:57

#	User	Length	Language	Date
1	Carter Henderson	383	Java	2022-04-19 16:04:51
2	Victor Clayton Barnett	395	Java	2022-01-29 01:39:05
3	Leslie Yip	412	Java	2022-08-12 11:27:50
4	David Vinje	416	Java	2021-11-26 15:53:15
5	Andreas Guldborg Hansen	424	Java	2021-11-26 15:22:15
6	Thomas Anung Basuki	431	Java	2025-12-23 03:20:35
7	Mikhail	440	Java	2025-11-28 14:18:27
8	Mark van Helvoort	442	Java	2024-03-28 13:16:21
9	Ben Cobb	446	Java	2022-11-13 23:39:50
10	Marshall D Feng	454	Java	2021-12-05 01:51:47

#	User	Length	Language	Date
1	Nikola Stojkovski	407	JavaScript (Node.js)	2022-08-15 08:54:21
2	Hidden user	458	JavaScript (Node.js)	2023-09-13 03:16:07
3	Chris Wong	709	JavaScript (Node.js)	2022-03-15 16:12:59
4	Niamh Limerick	772	JavaScript (Node.js)	2022-02-21 00:28:48
5	John	1704	JavaScript (Node.js)	2022-08-19 07:40:37

#	User	Length	Language	Date
1	Evan Magill	120	JavaScript (SpiderMonkey)	2024-04-20 06:08:09
2	Jimmy Gustafsson	144	JavaScript (SpiderMonkey)	2024-06-14 21:43:21
3	Christian Pilegaard Cederquist	156	JavaScript (SpiderMonkey)	2023-01-10 15:52:49
4	Bjørn Chr. Soltvedt	185	JavaScript (SpiderMonkey)	2021-11-16 11:27:58

#	User	Length	Language	Date
1	Danny Robinson	105	Julia	2023-09-04 13:07:27
2	Timothy Gaede	550	Julia	2024-03-27 12:07:16

#	User	Length	Language	Date
1	Adam Rankin	250	Kotlin	2023-08-25 03:35:03
2	Emil Wihlander	274	Kotlin	2023-07-27 11:37:10
3	Jacob Huebner	291	Kotlin	2022-02-22 22:03:01
4	Troy Warmboe	355	Kotlin	2023-12-21 21:38:38
5	Martijn Muijsers	563	Kotlin	2024-05-30 19:18:09
6	Nicholas Johnson	2193	Kotlin	2022-02-21 03:48:40

#	User	Length	Language	Date
1	Zeheng Li	109	Lua	2023-12-11 22:30:21

#	User	Length	Language	Date
1	Ingemar Ragnemalm	195	Pascal	2021-12-11 10:40:13
2	David Connolly	823	Pascal	2021-11-17 10:35:33

#	User	Length	Language	Date
1	Renate	283	PHP	2023-07-20 22:19:53

#	User	Length	Language	Date
1	Johan Lyts	114	Python 2	2022-04-19 19:45:17
2	Andreas Björklund	165	Python 2	2022-01-22 19:37:32
3	Yanmarshus Bachtiar	201	Python 2	2021-11-27 11:49:08
4	Hasan Kalzi	422	Python 2	2022-06-17 13:42:54

#	User	Length	Language	Date
1	Clement Oh	76	Python 3	2023-07-01 07:48:27
2	Hao Ye	82	Python 3	2024-09-04 09:27:55
3	Benjamin Z White	91	Python 3	2023-05-03 11:39:40
4	Guillermo Hernández	95	Python 3	2022-09-29 06:22:54
5	Charles Ancheta	95	Python 3	2023-04-09 06:30:34
6	Henrik Olsen Eide	95	Python 3	2023-09-05 16:02:39
7	Kévin Dubrulle	95	Python 3	2024-04-02 09:50:57
8	Maximilien Vanhaverbeke	95	Python 3	2024-11-25 20:40:29
9	Victorio NASCIMENTO	95	Python 3	2024-11-27 23:06:26
10	David Worley	95	Python 3	2025-11-19 23:09:32

#	User	Length	Language	Date
1	Thomas Feld	66	Ruby	2023-01-11 07:44:26
2	Hidden user	126	Ruby	2021-11-27 22:11:28
3	Saado, E. (Eli, Student B-CS)	174	Ruby	2022-09-23 20:57:49
4	Nikola Stojkovski	257	Ruby	2022-08-15 09:16:59

#	User	Length	Language	Date
1	David Rasch	361	Rust	2022-10-03 12:05:56
2	Vincent Lagerros	400	Rust	2025-02-04 13:45:17
3	Emil Dichmann	458	Rust	2025-09-20 11:06:14
4	Aaron Yeoh Cruz	469	Rust	2022-01-19 17:17:40
5	Isak Jägberg	526	Rust	2024-10-18 19:25:35
6	Pankajkumar Patro	567	Rust	2024-10-20 17:11:22
7	Bas Dirks	600	Rust	2022-01-05 04:50:49
8	Alex G	601	Rust	2022-02-08 22:07:56
9	Luna Peshkov	675	Rust	2022-09-18 14:48:00
10	Alice Ryhl	780	Rust	2021-11-26 15:18:21

Solution running time distribution