Problem A
Birds on a Wire — Problem Statistics

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Submissions	8447
Accepted submissions	2576
Submission ratio	30.50%
Authors	2431
Accepted authors	2033
Author ratio	83.63%

#	User	Runtime	Language	Date
1	Eyleifur Bjarkason	0.00 s	C	2021-08-15 20:59:14
2	Alexander Bilde Pedersen	0.00 s	C	2022-09-13 15:27:09
3	Hidden user	0.00 s	C	2022-12-17 22:43:41
4	Sanjiv Dinakar	0.00 s	C	2023-04-29 16:29:06
5	Clement-Andi Edet	0.00 s	C	2025-02-26 00:39:57
6	Sandu Calin	0.00 s	C	2025-02-26 16:27:23
7	Fredrik Atmer	0.01 s	C	2012-12-05 15:41:04
8	Hidden user	0.01 s	C	2016-07-18 01:31:32
9	Tapani	0.01 s	C	2017-08-30 19:05:54
10	Dalton Parker Caron	0.01 s	C	2018-10-13 23:47:39

#	User	Runtime	Language	Date
1	Duelene Olson	0.02 s	C#	2016-05-18 02:46:17
2	Robert Low	0.02 s	C#	2016-08-12 16:56:42
3	Andriy Zyevakov	0.03 s	C#	2015-12-08 13:12:31
4	Faisal Rahman	0.03 s	C#	2016-01-14 09:06:09
5	Andrzej Krajniak	0.03 s	C#	2016-08-05 00:17:45
6	Erik van Holland	0.03 s	C#	2017-09-21 17:23:46
7	Hidden user	0.04 s	C#	2021-11-16 20:00:38
8	Martin Holst	0.04 s	C#	2021-12-10 11:20:15
9	Jie Fan	0.04 s	C#	2022-07-20 20:36:28
10	traxex	0.04 s	C#	2024-05-06 17:53:28

#	User	Runtime	Language	Date
1	Hidden user	0.06 s	Common Lisp	2019-07-02 03:39:11

#	User	Runtime	Language	Date
1	Lukas Frimer Tholander	0.08 s	F#	2024-09-05 01:02:31

#	User	Runtime	Language	Date
1	MARIA JOSE MORALES AVALOS	0.01 s	Go	2025-04-26 05:27:51
2	Norbert Voelker	0.08 s	Go	2021-11-04 19:29:54

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.01 s	Haskell	2025-06-26 16:48:13
2	Brent Yorgey	0.02 s	Haskell	2017-11-15 06:41:18
3	Ryan Chew	0.02 s	Haskell	2019-03-29 14:40:59
4	Hidden user	0.06 s	Haskell	2016-07-18 16:48:15
5	Johan Meier	0.06 s	Haskell	2017-01-15 09:22:28
6	Isaac Arvestad	0.06 s	Haskell	2017-02-10 17:52:51
7	Elias Riedel Gårding	0.07 s	Haskell	2014-09-18 18:13:16
8	Olle Eriksson	0.07 s	Haskell	2018-06-27 06:26:20
9	Matthew Craven	0.07 s	Haskell	2020-06-04 06:16:36
10	Axel Suárez	0.07 s	Haskell	2021-03-10 04:19:37

#	User	Runtime	Language	Date
1	Nguyễn Hùng Cường	0.07 s	Java	2018-07-08 18:18:42
2	Đức Phạm Hoài	0.07 s	Java	2018-07-09 13:14:17
3	Khánh Nguyễn Tiến	0.07 s	Java	2018-07-10 06:09:15
4	Samuel Klingström	0.07 s	Java	2018-12-03 18:11:25
5	Kåre Kejser Jensen	0.07 s	Java	2023-04-26 12:15:06
6	Sven Rönnbäck	0.07 s	Java	2023-10-20 18:37:37
7	José Vander Meulen	0.08 s	Java	2018-02-13 13:39:29
8	Kristoffer Borgstrøm	0.08 s	Java	2021-09-07 13:27:15
9	Emil Bak-Møller	0.08 s	Java	2021-09-13 15:30:56
10	Aditya Gupta	0.08 s	Java	2022-04-12 23:28:25

#	User	Runtime	Language	Date
1	Urban Pettersson	0.10 s	JavaScript (Node.js)	2018-06-24 21:01:53
2	Stephanie Keck	0.46 s	JavaScript (Node.js)	2020-01-26 01:28:31
3	Youness Elaachiq	0.46 s	JavaScript (Node.js)	2020-02-07 01:44:01

#	User	Runtime	Language	Date
1	Peter Kedemo	0.02 s	JavaScript (SpiderMonkey)	2016-01-04 23:21:25
2	Benjamin A Jenkins	0.02 s	JavaScript (SpiderMonkey)	2017-01-20 21:52:23
3	Bjørn Chr. Soltvedt	0.03 s	JavaScript (SpiderMonkey)	2022-06-18 06:40:06
4	Christian Cederquist	0.03 s	JavaScript (SpiderMonkey)	2023-06-10 00:33:26
5	Nick Cooper	0.04 s	JavaScript (SpiderMonkey)	2024-03-16 02:20:28

#	User	Runtime	Language	Date
1	Noszály Csaba	0.51 s	Julia	2025-03-28 16:28:49
2	Timothy Gaede	0.61 s	Julia	2024-08-07 11:06:35

#	User	Runtime	Language	Date
1	Hidden user	0.23 s	Kotlin	2020-02-22 15:25:44
2	Adam Rankin	0.30 s	Kotlin	2023-09-22 04:56:50
3	Hidden user	0.36 s	Kotlin	2022-05-17 13:09:03

#	User	Runtime	Language	Date
1	Caleb Austin	0.02 s	Lua	2024-09-20 23:19:15

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.01 s	Pascal	2018-10-28 09:47:00

#	User	Runtime	Language	Date
1	Renate	0.02 s	PHP	2023-08-09 22:42:52

#	User	Runtime	Language	Date
1	Christofer Ohlsson	0.03 s	Python 2	2015-05-22 11:08:07
2	Urban Pettersson	0.03 s	Python 2	2015-11-15 16:22:41
3	Sebastian Åkerman	0.03 s	Python 2	2016-04-08 20:45:20
4	Hermon Mulat	0.03 s	Python 2	2016-12-18 04:18:27
5	Andrei Stoica	0.03 s	Python 2	2017-10-26 12:45:09
6	William Ogletree	0.03 s	Python 2	2019-01-26 00:12:15
7	Henry Jayakusuma	0.03 s	Python 2	2019-03-27 13:28:44
8	Erik Odenman	0.04 s	Python 2	2015-05-12 00:30:37
9	Meme Maestro	0.04 s	Python 2	2016-07-24 08:10:10
10	Daniel Strizhevsky	0.04 s	Python 2	2016-09-17 04:25:19

#	User	Runtime	Language	Date
1	Aaron Dunigan AtLee	0.03 s	Python 3	2018-01-31 03:42:46
2	Henry Jayakusuma	0.03 s	Python 3	2019-03-27 13:27:32
3	Coy Christensen	0.03 s	Python 3	2019-10-05 01:29:18
4	Ryan Farrell	0.03 s	Python 3	2019-10-05 07:24:14
5	Gamithra Marga	0.04 s	Python 3	2018-01-28 11:59:30
6	Lino Toran Jenner	0.04 s	Python 3	2018-04-13 22:08:22
7	Lisa Mayer	0.04 s	Python 3	2018-07-01 20:51:05
8	Michael Wong	0.04 s	Python 3	2018-10-05 23:57:07
9	Delon Shen	0.04 s	Python 3	2019-01-25 22:57:32
10	Vincent Tandya	0.04 s	Python 3	2019-02-01 03:43:30

#	User	Runtime	Language	Date
1	Chris Weston	0.04 s	Ruby	2016-02-20 22:43:23
2	Casper Christensen	0.04 s	Ruby	2016-07-23 21:55:09
3	Thomas Feld	0.07 s	Ruby	2023-02-28 14:58:23
4	Clement Oh	0.07 s	Ruby	2024-02-23 14:47:22
5	Andreas Severin Hauch Trøstrup	0.07 s	Ruby	2024-09-04 19:03:54
6	Frederik Petersen	0.09 s	Ruby	2024-09-04 16:03:29

#	User	Runtime	Language	Date
1	Johan Flensmark	0.00 s	Rust	2022-09-09 18:33:08
2	Hidden user	0.00 s	Rust	2022-12-08 10:27:26
3	Anton Iacobaeus	0.00 s	Rust	2023-02-16 14:24:56
4	Niklas Sandén	0.00 s	Rust	2023-03-22 18:06:53
5	Vincent Lagerros	0.00 s	Rust	2024-05-16 23:20:39
6	Egor Kulikov	0.00 s	Rust	2025-02-04 12:16:27
7	Ming Kang	0.00 s	Rust	2025-06-06 06:08:25
8	Twoflower	0.01 s	Rust	2022-02-13 21:07:48
9	poppyer	0.01 s	Rust	2022-05-06 19:33:35
10	Hidden user	0.01 s	Rust	2024-12-30 05:32:57

#	User	Length	Language	Date
1	Charles Boole	601	C	2019-10-20 07:00:03
2	Clement-Andi Edet	604	C	2025-02-26 00:39:57
3	Brian Jezreel So	622	C	2019-10-20 07:01:08
4	Hidden user	626	C	2022-12-17 22:43:41
5	Anders Friis Kaas	692	C	2020-11-27 22:43:46
6	Sandu Calin	702	C	2025-02-26 16:27:23
7	Fredrik Atmer	753	C	2012-12-05 15:41:04
8	Dalton Parker Caron	780	C	2018-10-13 23:47:39
9	Hidden user	844	C	2022-06-04 03:39:10
10	Julian Rafael Sunpayco	891	C	2019-10-19 15:58:14

#	User	Length	Language	Date
1	traxex	494	C#	2024-05-06 17:53:28
2	Martin Holst	1030	C#	2021-12-10 11:20:15
3	Nicolai Grymer	1144	C#	2023-09-10 21:40:04
4	Robert Low	1194	C#	2016-08-12 16:56:42
5	Hidden user	1207	C#	2021-11-16 20:00:38
6	Nicke Nyfiken	1652	C#	2025-04-02 09:21:00
7	Jie Fan	1753	C#	2022-07-20 20:36:28
8	Erik van Holland	1826	C#	2017-09-21 17:23:46
9	Martin Liu	1835	C#	2023-10-13 06:03:53
10	Faisal Rahman	2073	C#	2016-01-14 09:06:09

#	User	Length	Language	Date
1	Frans Meulenbroeks	220	C++	2024-11-11 12:11:11
2	Jesper Bech Christensen	229	C++	2022-09-07 14:34:43
3	Zane Yu	299	C++	2018-12-10 15:14:04
4	Markus Mathiasen	322	C++	2022-08-24 11:58:58
5	Grae Yeandle	326	C++	2021-11-13 11:37:08
6	Alexander Engström	334	C++	2023-10-10 19:52:06
7	Jalvin Chan Jia Xiang	349	C++	2020-04-13 16:35:08
8	Rene Josiah M. Quinto	365	C++	2016-03-07 01:48:10
9	Debadutta Padhial	367	C++	2018-11-24 15:16:15
10	Estelle Lee	371	C++	2016-02-01 14:18:05

#	User	Length	Language	Date
1	Hidden user	571	Common Lisp	2019-07-02 03:39:11

#	User	Length	Language	Date
1	Lukas Frimer Tholander	2860	F#	2024-09-05 01:02:31

#	User	Length	Language	Date
1	Norbert Voelker	784	Go	2021-11-04 19:29:54
2	MARIA JOSE MORALES AVALOS	1745	Go	2025-04-26 05:27:51

#	User	Length	Language	Date
1	Ryan Chew	417	Haskell	2019-03-29 12:29:01
2	Elias Riedel Gårding	489	Haskell	2014-09-18 18:13:16
3	Johan Meier	509	Haskell	2017-01-15 09:22:28
4	Steinar Simonnes	582	Haskell	2025-06-26 16:45:48
5	Brent Yorgey	637	Haskell	2017-11-15 06:41:18
6	Matthew Craven	662	Haskell	2020-06-04 06:16:36
7	Axel Suárez	737	Haskell	2021-03-10 04:19:37
8	Hidden user	770	Haskell	2023-10-13 16:39:08
9	Olle Eriksson	944	Haskell	2018-06-27 06:26:20
10	Isaac Arvestad	1434	Haskell	2017-02-10 17:52:51

#	User	Length	Language	Date
1	Gutti Torvadal	457	Java	2024-04-20 15:48:27
2	Xuehui Chen	529	Java	2018-07-05 00:28:46
3	Tú Thanh	530	Java	2015-11-14 06:57:12
4	Tú Huỳnh	530	Java	2015-11-14 06:57:56
5	Ive Xu	539	Java	2015-11-26 07:09:35
6	Ayoub El Yaquine	551	Java	2017-01-31 23:12:53
7	Emil Bak-Møller	644	Java	2019-02-22 02:40:41
8	Matt Bonsall	662	Java	2016-09-08 17:01:54
9	Eric Leow Yu Quan	663	Java	2021-05-06 07:10:57
10	Marco Karaan	688	Java	2016-03-07 02:12:53

#	User	Length	Language	Date
1	Urban Pettersson	878	JavaScript (Node.js)	2018-06-24 21:01:53
2	Youness Elaachiq	1650	JavaScript (Node.js)	2020-02-07 01:44:01
3	Stephanie Keck	9902	JavaScript (Node.js)	2020-01-26 01:28:31

#	User	Length	Language	Date
1	Nick Cooper	134	JavaScript (SpiderMonkey)	2024-03-16 04:13:32
2	Peter Kedemo	444	JavaScript (SpiderMonkey)	2016-01-04 23:21:25
3	Christian Cederquist	517	JavaScript (SpiderMonkey)	2023-06-10 00:33:26
4	Benjamin A Jenkins	654	JavaScript (SpiderMonkey)	2017-01-20 21:52:23
5	Bjørn Chr. Soltvedt	708	JavaScript (SpiderMonkey)	2022-06-18 06:40:06

#	User	Length	Language	Date
1	Noszály Csaba	138	Julia	2025-03-28 16:28:49
2	Timothy Gaede	1115	Julia	2024-08-07 11:06:35

#	User	Length	Language	Date
1	Hidden user	615	Kotlin	2022-05-17 12:02:54
2	Adam Rankin	727	Kotlin	2023-09-22 04:56:50
3	Hidden user	960	Kotlin	2020-02-22 15:25:44

#	User	Length	Language	Date
1	Caleb Austin	654	Lua	2024-09-20 23:19:15

#	User	Length	Language	Date
1	Ingemar Ragnemalm	1787	Pascal	2018-10-28 09:47:00

#	User	Length	Language	Date
1	Renate	646	PHP	2023-08-09 22:42:52

#	User	Length	Language	Date
1	Thomas Feld	178	Python 2	2020-06-23 00:00:40
2	Erik Odenman	204	Python 2	2015-05-12 00:30:37
3	Neal Zane	215	Python 2	2015-12-14 02:19:02
4	Hidden user	224	Python 2	2018-01-05 07:48:15
5	Andreas Björklund	237	Python 2	2019-05-19 09:12:45
6	Måns Gezelius	237	Python 2	2018-05-21 16:18:28
7	Herbert Ilhan Tanujaya	259	Python 2	2019-03-27 10:31:23
8	William Gan	269	Python 2	2017-12-23 12:13:43
9	Lars Åström	282	Python 2	2019-09-16 18:18:40
10	Urban Pettersson	295	Python 2	2015-11-15 16:22:41

#	User	Length	Language	Date
1	Benjamin Z White	110	Python 3	2023-04-14 17:49:14
2	Gustav Elmqvist	137	Python 3	2023-02-16 20:52:46
3	Luke Dulworth	146	Python 3	2025-02-26 04:44:13
4	Ahmed Chamseddine	148	Python 3	2025-05-05 16:13:03
5	vance	148	Python 3	2022-11-21 06:49:26
6	Simon Langlois	164	Python 3	2024-03-12 11:20:19
7	Jakub Jagiello	172	Python 3	2022-07-31 18:10:08
8	Nick Cooper	174	Python 3	2024-03-11 20:20:11
9	Thomas Draper	175	Python 3	2024-11-10 02:49:20
10	George Zhang	177	Python 3	2023-02-04 00:36:58

#	User	Length	Language	Date
1	Thomas Feld	79	Ruby	2023-02-28 14:58:23
2	Clement Oh	141	Ruby	2024-02-23 14:47:22
3	Andreas Severin Hauch Trøstrup	160	Ruby	2024-09-04 19:12:40
4	Casper Christensen	334	Ruby	2016-07-23 21:55:09
5	Frederik Petersen	392	Ruby	2024-09-04 16:03:29
6	Chris Weston	1174	Ruby	2016-02-20 22:43:23

#	User	Length	Language	Date
1	poppyer	991	Rust	2022-05-06 19:33:35
2	Hidden user	1218	Rust	2022-12-08 10:27:26
3	Johan Flensmark	1369	Rust	2022-09-09 18:41:52
4	Twoflower	1546	Rust	2022-02-13 21:07:48
5	Anton Iacobaeus	1727	Rust	2023-02-16 14:24:56
6	Hidden user	1914	Rust	2024-12-30 05:32:57
7	Ming Kang	2644	Rust	2025-06-06 06:08:25
8	Vincent Lagerros	3981	Rust	2024-05-16 23:20:39
9	Egor Kulikov	17828	Rust	2025-02-04 12:16:27
10	Niklas Sandén	26216	Rust	2023-03-22 18:06:53

Solution running time distribution