Problem A
Hydra's Heads

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Problem statistics

Submissions	2388
Accepted submissions	1175
Submission ratio	49.20%
Authors	1126
Accepted authors	1045
Author ratio	92.81%

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

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

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

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

#	User	Runtime	Date
1	José Vander Meulen	0.05 s	2018-12-12 14:12:28
2	Bjørn Dons	0.05 s	2018-12-14 22:15:26
3	Prakash Sanyasi	0.05 s	2018-12-16 17:11:51
4	Nguyen Thanh Trung	0.06 s	2018-11-30 01:05:26
5	Hiếu Lăng	0.06 s	2018-11-30 01:29:28
6	Lim Zhan Hong	0.06 s	2020-05-16 07:50:14
7	Ryan Lee Ting Zhern	0.06 s	2020-05-20 10:59:17
8	Andy Polizzotto	0.06 s	2020-06-03 00:33:35
9	Theodoric Keith Lim	0.06 s	2020-06-03 11:50:06
10	Anh Tài Trần	0.06 s	2020-06-05 03:56:32

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

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

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

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

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

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

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

#	User	Runtime	Date
1	Chaoyi Yin	0.00 s	2019-03-29 19:17:37
2	Steve Tate	0.00 s	2020-05-16 00:10:57
3	David Zacek	0.00 s	2021-06-01 18:26:11
4	Kok Dith	0.00 s	2021-08-13 03:56:22
5	Eric Pinter	0.00 s	2021-10-17 19:41:03
6	Akke Mei Vleerlaag	0.00 s	2021-10-31 10:42:55
7	Bas Dirks	0.00 s	2022-02-07 10:44:39
8	Aaron Lengyel	0.00 s	2023-04-29 01:23:41
9	Anders Engqvist	0.07 s	2020-04-13 18:18:51
10	Kevin Caffrey	0.10 s	2018-12-31 03:16:04

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

#	User	Length	Date
1	Göran Andersson	675	2022-05-11 23:54:20
2	Thomas Norris	738	2019-06-21 00:46:03
3	Eric Bäckhage	1463	2019-02-07 21:52:11
4	Goran Hrovat	1480	2019-05-03 18:04:08
5	Joseph Russell	1615	2018-12-16 22:49:22
6	Garway Mei	1818	2019-03-21 04:25:17
7	Hidden user	1837	2019-07-18 23:15:08
8	Brian Liang	1838	2019-02-10 05:38:39
9	Clinton Wong	2378	2019-04-17 04:47:22
10	Risto Kaunisto	10766	2019-07-28 15:11:36

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

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

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

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

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

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

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

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

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

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

#	User	Length	Date
1	Thibault Raffaillac	123	2023-08-12 15:19:13
2	Charles Ancheta	129	2023-05-13 08:16:07
3	Harry Zhang	143	2023-01-13 16:31:38
4	Christian Blumenthal	147	2019-02-11 17:19:38
5	Florian Dubois	206	2021-05-25 00:20:16
6	Henry Xia	209	2022-06-06 06:13:17
7	Shashank Bhatt	220	2022-05-07 20:50:41
8	Paco Criado	221	2023-08-11 13:14:46
9	Jason Cannon	226	2019-11-06 21:08:18
10	Vedran Čačić	230	2019-01-13 13:56:37

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

#	User	Length	Date
1	Chaoyi Yin	834	2019-03-29 19:17:37
2	David Zacek	856	2021-06-01 18:26:11
3	Eric Pinter	1091	2021-10-17 19:41:03
4	Akke Mei Vleerlaag	1481	2021-10-31 10:42:55
5	Kevin Caffrey	1517	2018-12-31 03:16:04
6	Bas Dirks	1584	2022-02-07 10:44:39
7	Steve Tate	1691	2020-05-16 00:10:57
8	Kok Dith	1757	2021-08-13 03:56:22
9	Anders Engqvist	4876	2020-04-13 18:18:51
10	Aaron Lengyel	5137	2023-04-29 01:23:41

Solution running time distribution