Problem A
Hydra's Heads — Problem Statistics

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Submissions	2664
Accepted submissions	1260
Submission ratio	47.30%
Authors	1211
Accepted authors	1114
Author ratio	91.99%

#	User	Runtime	Language	Date
1	Sebastian Banert	0.00 s	Ada	2024-10-20 18:24:48

#	User	Runtime	Language	Date
1	Joseph Russell	0.02 s	C#	2018-12-16 22:49:22
2	Eric Bäckhage	0.02 s	C#	2019-02-07 21:52:11
3	Brian Liang	0.02 s	C#	2019-02-10 05:38:39
4	Garway Mei	0.02 s	C#	2019-03-21 04:25:17
5	Clinton Wong	0.02 s	C#	2019-04-17 04:47:22
6	Goran Hrovat	0.02 s	C#	2019-05-03 18:04:08
7	Fredrik Stigsson	0.02 s	C#	2019-05-09 13:45:15
8	Thomas Norris	0.02 s	C#	2019-06-21 00:46:03
9	Hidden user	0.02 s	C#	2019-07-18 23:15:08
10	Risto Kaunisto	0.03 s	C#	2019-07-28 15:11:36

#	User	Runtime	Language	Date
1	David Cawthon	0.02 s	Common Lisp	2019-04-28 18:54:35

#	User	Runtime	Language	Date
1	Yitian Wang	0.02 s	Go	2023-03-23 04:09:34
2	Krzysztof Gibuła	0.07 s	Go	2019-02-14 21:49:31
3	Andriy Zyevakov	0.07 s	Go	2019-04-16 08:55:41
4	Thomas Mailund	0.08 s	Go	2020-11-26 09:47:59
5	Norbert Voelker	0.08 s	Go	2021-04-17 00:17:39

#	User	Runtime	Language	Date
1	Brent Yorgey	0.01 s	Haskell	2018-12-11 18:21:59
2	Micah Stairs	0.01 s	Haskell	2019-03-17 23:05:08
3	Michael Wong	0.01 s	Haskell	2019-04-17 03:13:39
4	Matthew Johnson	0.01 s	Haskell	2019-05-15 01:53:27
5	Hidden user	0.01 s	Haskell	2019-08-13 14:31:26
6	Caleb Surovik	0.01 s	Haskell	2021-07-04 00:50:08
7	Steinar Simonnes	0.02 s	Haskell	2025-01-23 14:26:40
8	Jan Hrček	0.72 s	Haskell	2020-10-27 14:19:46

#	User	Runtime	Language	Date
1	José Vander Meulen	0.05 s	Java	2018-12-12 14:12:28
2	Bjørn Dons	0.05 s	Java	2018-12-14 22:15:26
3	Prakash Sanyasi	0.05 s	Java	2018-12-16 17:11:51
4	Ku Brian	0.05 s	Java	2024-05-12 11:53:20
5	Nguyen Thanh Trung	0.06 s	Java	2018-11-30 01:05:26
6	Hiếu Lăng	0.06 s	Java	2018-11-30 01:29:28
7	Lim Zhan Hong	0.06 s	Java	2020-05-16 07:50:14
8	Ryan Lee Ting Zhern	0.06 s	Java	2020-05-20 10:59:17
9	Andrew Polizzotto	0.06 s	Java	2020-06-03 00:33:35
10	Theodoric Keith Lim	0.06 s	Java	2020-06-03 11:50:06

#	User	Runtime	Language	Date
1	John	0.09 s	JavaScript (Node.js)	2022-07-31 04:57:36
2	Peter Kedemo	0.42 s	JavaScript (Node.js)	2020-01-05 23:43:57
3	Andoko Chandra	0.42 s	JavaScript (Node.js)	2020-10-08 19:04:43
4	Chris Wong	0.42 s	JavaScript (Node.js)	2021-02-20 22:39:21
5	Navid Pirsajed	0.42 s	JavaScript (Node.js)	2021-03-18 02:30:50

#	User	Runtime	Language	Date
1	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2022-09-14 10:17:37
2	Christian Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-01-15 13:13:35
3	Bjørn Chr. Soltvedt	0.03 s	JavaScript (SpiderMonkey)	2018-12-12 19:30:11
4	Peter Menyes	0.03 s	JavaScript (SpiderMonkey)	2021-08-16 20:45:44

#	User	Runtime	Language	Date
1	Timothy Gaede	0.54 s	Julia	2024-06-25 11:29:19

#	User	Runtime	Language	Date
1	Neil Harmon	0.20 s	Kotlin	2019-04-04 14:26:34
2	Adam Rankin	0.21 s	Kotlin	2023-04-27 18:20:47
3	Troy Warmboe	0.23 s	Kotlin	2020-02-10 21:52:39

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2018-12-11 20:43:03

#	User	Runtime	Language	Date
1	Catalin Popa	0.03 s	Python 2	2018-12-12 17:44:59
2	Hermon Mulat	0.03 s	Python 2	2018-12-20 21:40:59
3	Andrei Stoica	0.03 s	Python 2	2019-01-02 14:03:43
4	Anubhav Roy Bhattacharya	0.03 s	Python 2	2019-01-18 18:44:27
5	Redwan Yassin Mohammedberhan	0.03 s	Python 2	2019-01-26 04:08:01
6	Jesper Öqvist	0.03 s	Python 2	2019-02-24 11:26:01
7	Kylee Willis	0.03 s	Python 2	2019-03-07 20:11:31
8	Conor McCauley	0.03 s	Python 2	2019-03-22 09:42:31
9	Thomas Feld	0.03 s	Python 2	2019-08-30 13:12:17
10	Yanmarshus Bachtiar	0.03 s	Python 2	2020-08-29 04:24:23

#	User	Runtime	Language	Date
1	Iman Khodadi	0.02 s	Python 3	2018-12-12 11:17:23
2	Davi Ajmaya	0.02 s	Python 3	2018-12-12 11:45:43
3	Yang Li	0.02 s	Python 3	2018-12-12 19:48:59
4	Noah Gergel	0.02 s	Python 3	2018-12-13 07:47:59
5	Alex Kohanim	0.02 s	Python 3	2018-12-13 11:20:51
6	Hidden user	0.02 s	Python 3	2018-12-13 16:49:45
7	Hidden user	0.02 s	Python 3	2018-12-15 16:53:13
8	Jonathan Yudi Gunawan	0.02 s	Python 3	2018-12-20 14:56:35
9	Sho Ya Voorthuyzen	0.02 s	Python 3	2018-12-22 00:41:54
10	Alexei Fedotov	0.02 s	Python 3	2018-12-24 14:40:04

#	User	Runtime	Language	Date
1	Stefan Kennedy	0.04 s	Ruby	2019-01-20 14:52:43
2	Hidden user	0.04 s	Ruby	2019-04-01 17:45:30
3	Donald Dong	0.05 s	Ruby	2018-12-28 07:35:31
4	Hidden user	0.05 s	Ruby	2020-09-16 18:10:36
5	Thomas Feld	0.06 s	Ruby	2023-02-28 09:36:14

#	User	Runtime	Language	Date
1	Chaoyi Yin	0.00 s	Rust	2019-03-29 19:17:37
2	Steve Tate	0.00 s	Rust	2020-05-16 00:10:57
3	David Zacek	0.00 s	Rust	2021-06-01 18:26:11
4	Kok Dith	0.00 s	Rust	2021-08-13 03:56:22
5	Eric Pinter	0.00 s	Rust	2021-10-17 19:41:03
6	Akke Mei Vleerlaag	0.00 s	Rust	2021-10-31 10:42:55
7	Bas Dirks	0.00 s	Rust	2022-02-07 10:44:39
8	Aaron Lengyel	0.00 s	Rust	2023-04-29 01:23:41
9	Pankajkumar Patro	0.00 s	Rust	2025-01-22 18:43:26
10	Vincent Lagerros	0.00 s	Rust	2025-01-27 11:52:39

#	User	Length	Language	Date
1	Sebastian Banert	760	Ada	2024-10-20 18:24:48

#	User	Length	Language	Date
1	Andrew Roberts	314	C	2020-06-04 00:24:19
2	arda atci	326	C	2022-04-24 20:50:24
3	Ximun Castoreo	426	C	2020-07-22 08:54:55
4	Wesley Stephanak	534	C	2019-01-31 05:52:09
5	Md Amiruzzaman	579	C	2022-07-21 18:18:06
6	Sambit Palit	581	C	2020-10-13 01:47:40
7	Sam Zimmerman	597	C	2021-04-27 00:24:58
8	Jón Steinn Elíasson	599	C	2020-03-03 18:30:53
9	Sơn Nguyễn Hồng	635	C	2019-01-26 07:13:50
10	Emil Wihlander	861	C	2020-12-01 01:24:55

#	User	Length	Language	Date
1	traxex	472	C#	2024-05-16 18:06:35
2	Göran Andersson	675	C#	2022-05-11 23:54:20
3	Thomas Norris	738	C#	2019-06-21 00:46:03
4	Eric Bäckhage	1463	C#	2019-02-07 21:52:11
5	Goran Hrovat	1480	C#	2019-05-03 18:04:08
6	Joseph Russell	1615	C#	2018-12-16 22:49:22
7	Garway Mei	1818	C#	2019-03-21 04:25:17
8	Hidden user	1837	C#	2019-07-18 23:15:08
9	Brian Liang	1838	C#	2019-02-10 05:38:39
10	Clinton Wong	2378	C#	2019-04-17 04:47:22

#	User	Length	Language	Date
1	Oisin Carroll	175	C++	2019-02-13 03:21:54
2	承佑鍾	264	C++	2020-04-24 14:53:41
3	Domen Su	276	C++	2019-09-21 08:17:31
4	Yungchun Hsiao	278	C++	2020-04-24 17:17:35
5	Kyle Dulay	280	C++	2020-11-07 03:02:07
6	Zheng-Dao Yang	290	C++	2019-02-18 14:00:55
7	Armen Andreasyan	291	C++	2018-12-19 19:07:23
8	Li Jiayu	291	C++	2021-12-05 03:31:57
9	陳小宇	292	C++	2020-03-21 16:03:59
10	Phuong Tran	294	C++	2022-05-07 20:38:28

#	User	Length	Language	Date
1	David Cawthon	1580	Common Lisp	2019-04-28 18:54:35

#	User	Length	Language	Date
1	Thomas Mailund	342	Go	2020-11-26 09:47:59
2	Andriy Zyevakov	585	Go	2019-04-16 08:55:41
3	Krzysztof Gibuła	744	Go	2019-02-14 21:49:31
4	Norbert Voelker	900	Go	2021-04-17 00:24:19
5	Yitian Wang	1394	Go	2023-03-23 04:09:34

#	User	Length	Language	Date
1	Micah Stairs	397	Haskell	2019-03-17 23:05:08
2	Brent Yorgey	470	Haskell	2018-12-11 18:21:59
3	Caleb Surovik	595	Haskell	2021-07-04 00:50:08
4	Hidden user	610	Haskell	2019-08-13 14:31:26
5	Michael Wong	675	Haskell	2019-04-17 03:13:39
6	Matthew Johnson	718	Haskell	2019-05-15 01:53:27
7	Jan Hrček	851	Haskell	2020-10-27 14:19:46
8	Steinar Simonnes	1301	Haskell	2025-01-23 14:26:40

#	User	Length	Language	Date
1	Caeden Whitaker	419	Java	2020-07-06 05:05:51
2	Ryan Looney	511	Java	2019-04-11 03:41:57
3	Henry Cooper	519	Java	2019-03-08 17:24:34
4	Anand Iyer	572	Java	2019-01-20 02:57:13
5	Alberto Alvarez	587	Java	2019-01-06 22:54:40
6	Prakash Sanyasi	591	Java	2018-12-16 17:08:54
7	Nazri Abdullah	627	Java	2019-04-24 20:17:23
8	Emilie Hyslop	646	Java	2021-01-01 07:46:55
9	Doug Goodman	657	Java	2019-05-11 20:01:46
10	Jackie Trinh	663	Java	2020-02-07 20:40:08

#	User	Length	Language	Date
1	Peter Kedemo	650	JavaScript (Node.js)	2020-01-05 23:43:57
2	Andoko Chandra	999	JavaScript (Node.js)	2020-10-08 19:04:43
3	Chris Wong	1022	JavaScript (Node.js)	2021-02-20 22:39:21
4	John	1056	JavaScript (Node.js)	2022-07-31 04:57:36
5	Navid Pirsajed	1250	JavaScript (Node.js)	2021-03-18 02:30:50

#	User	Length	Language	Date
1	Jimmy Gustafsson	215	JavaScript (SpiderMonkey)	2022-09-14 10:17:37
2	Bjørn Chr. Soltvedt	391	JavaScript (SpiderMonkey)	2018-12-12 19:30:11
3	Christian Cederquist	392	JavaScript (SpiderMonkey)	2023-01-15 13:13:35
4	Peter Menyes	565	JavaScript (SpiderMonkey)	2021-08-16 20:45:44

#	User	Length	Language	Date
1	Timothy Gaede	649	Julia	2024-06-25 11:29:19

#	User	Length	Language	Date
1	Adam Rankin	667	Kotlin	2023-04-27 18:20:47
2	Troy Warmboe	1365	Kotlin	2020-02-10 21:52:39
3	Neil Harmon	1411	Kotlin	2019-04-04 14:26:34

#	User	Length	Language	Date
1	Ingemar Ragnemalm	428	Pascal	2018-12-11 20:43:03

#	User	Length	Language	Date
1	Thomas Feld	183	Python 2	2019-08-30 13:12:17
2	Andreas Björklund	275	Python 2	2021-03-24 16:26:26
3	Yanmarshus Bachtiar	360	Python 2	2020-08-29 04:24:23
4	Redwan Yassin Mohammedberhan	414	Python 2	2019-01-26 04:08:01
5	Jesper Öqvist	415	Python 2	2019-02-24 11:26:01
6	Anubhav Roy Bhattacharya	454	Python 2	2019-01-18 18:44:27
7	Andrei Stoica	465	Python 2	2019-01-02 14:06:56
8	Lars Åström	492	Python 2	2019-09-26 11:57:51
9	Kylee Willis	502	Python 2	2019-03-07 20:11:31
10	Johan Lyts	555	Python 2	2019-04-25 22:15:31

#	User	Length	Language	Date
1	Kévin Dubrulle	104	Python 3	2024-11-01 13:51:33
2	Thibault Raffaillac	123	Python 3	2023-08-12 15:19:13
3	Charles Ancheta	129	Python 3	2023-05-13 08:16:07
4	Harry Zhang	143	Python 3	2023-01-13 16:31:38
5	Christian Blumenthal	147	Python 3	2019-02-11 17:19:38
6	Ahmed Chamseddine	171	Python 3	2024-07-22 13:32:54
7	Tai Tze Kin	174	Python 3	2024-05-05 12:08:21
8	Donovan Bly	175	Python 3	2025-01-24 07:47:08
9	Florian Dubois	206	Python 3	2021-05-25 00:20:16
10	Henry Xia	209	Python 3	2022-06-06 06:13:17

#	User	Length	Language	Date
1	Thomas Feld	86	Ruby	2023-02-28 09:47:03
2	Hidden user	191	Ruby	2019-04-01 17:45:30
3	Hidden user	197	Ruby	2020-09-16 18:10:36
4	Stefan Kennedy	350	Ruby	2019-01-20 14:52:43
5	Donald Dong	538	Ruby	2018-12-28 07:35:31

#	User	Length	Language	Date
1	Pankajkumar Patro	488	Rust	2025-01-22 18:43:26
2	Vincent Lagerros	616	Rust	2025-01-27 11:52:39
3	Chaoyi Yin	834	Rust	2019-03-29 19:17:37
4	David Zacek	856	Rust	2021-06-01 18:26:11
5	Eric Pinter	1091	Rust	2021-10-17 19:41:03
6	Akke Mei Vleerlaag	1481	Rust	2021-10-31 10:42:55
7	Kevin Caffrey	1517	Rust	2018-12-31 03:16:04
8	Bas Dirks	1584	Rust	2022-02-07 10:44:39
9	Steve Tate	1691	Rust	2020-05-16 00:10:57
10	Kok Dith	1757	Rust	2021-08-13 03:56:22

Solution running time distribution