Problem A
Combination Lock — Problem Statistics

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Submissions	4952
Accepted submissions	1933
Submission ratio	39.03%
Authors	1893
Full solves [?]	1613
Full solve Ratio	85.21%

#	User	Runtime	Language	Date
1	Max NC	0.23 s	APL	2023-09-11 20:49:09
2	Thomas Feld	0.23 s	APL	2023-09-12 10:54:27

#	User	Runtime	Language	Date
1	Thomas Feld	0.01 s	Bash	2023-09-12 10:04:14

#	User	Runtime	Language	Date
1	Duelene Olson	0.02 s	C#	2017-04-27 19:28:08
2	Hidden user	0.02 s	C#	2017-09-07 16:05:10
3	Саттар Имамов	0.02 s	C#	2017-11-02 22:54:41
4	Nils Lenart	0.02 s	C#	2020-04-01 13:07:29
5	Hakan Yurt	0.02 s	C#	2023-03-28 06:20:17
6	Jeremiah A. Stringer	0.03 s	C#	2017-09-20 18:42:42
7	Jacob Aufdenberg	0.03 s	C#	2019-07-09 16:27:45
8	Daniel Fennhagen	0.03 s	C#	2019-09-18 12:32:01
9	Simon Aydin	0.03 s	C#	2020-09-12 20:03:28
10	Chi Tran	0.03 s	C#	2020-12-09 03:51:40

#	User	Runtime	Language	Date
1	David Cawthon	0.03 s	Common Lisp	2019-05-25 15:20:00

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	F#	2022-07-21 16:38:16

#	User	Runtime	Language	Date
1	Husain Satan	0.01 s	Go	2023-12-02 10:38:38
2	Magix	0.02 s	Go	2020-09-18 11:36:09
3	Norbert Voelker	0.03 s	Go	2021-03-28 18:45:33
4	Hidden user	0.03 s	Go	2025-01-11 23:38:19
5	Christian Vestergaard	0.08 s	Go	2021-05-02 17:14:45
6	Carl Mårshagen	0.13 s	Go	2018-06-12 22:08:03
7	Peter Sutherland	0.13 s	Go	2018-06-19 20:47:06

#	User	Runtime	Language	Date
1	Evan Wilde	0.01 s	Haskell	2017-02-23 18:53:41
2	César Antonio Carvajal de la Haza	0.01 s	Haskell	2017-04-25 14:26:38
3	Brent Yorgey	0.01 s	Haskell	2017-11-08 02:59:35
4	Hidden user	0.01 s	Haskell	2022-04-23 10:03:36
5	Emanuel Särnhammar	0.01 s	Haskell	2022-06-18 14:51:39
6	Brandon Tang	0.01 s	Haskell	2022-07-17 08:09:19
7	Hidden user	0.01 s	Haskell	2022-12-27 12:00:08
8	Erik Olof Ossian Eriksson	0.01 s	Haskell	2023-01-19 15:39:19
9	Attila Koszo	0.01 s	Haskell	2023-02-02 14:49:40
10	Sebastian Banert	0.01 s	Haskell	2023-04-23 13:35:08

#	User	Runtime	Language	Date
1	Issa Issack	0.05 s	Java	2025-04-07 17:03:04
2	Khánh Nguyễn Tiến	0.06 s	Java	2018-07-27 08:37:29
3	John Ladera	0.06 s	Java	2018-11-18 06:25:46
4	Joachim Borup	0.06 s	Java	2022-11-17 23:34:00
5	Hans Gylling	0.07 s	Java	2010-02-05 03:55:43
6	Ashkan Jahanbakhsh	0.07 s	Java	2011-12-19 14:22:26
7	Ashu Yadav	0.07 s	Java	2018-07-01 07:11:47
8	Emil Bak-Møller	0.07 s	Java	2020-09-11 09:19:16
9	Simon Kristiansen	0.07 s	Java	2020-11-16 11:55:53
10	Kristoffer Borgstrøm	0.07 s	Java	2020-12-07 19:58:56

#	User	Runtime	Language	Date
1	Peter D'Elia	0.06 s	JavaScript (Node.js)	2023-11-10 16:14:28
2	Sander Hellesø	0.09 s	JavaScript (Node.js)	2019-04-20 06:30:22
3	Wee Jong Cheong	0.43 s	JavaScript (Node.js)	2021-04-01 14:04:35
4	Peter Kedemo	0.46 s	JavaScript (Node.js)	2020-01-02 17:28:14

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2017-02-20 03:11:58
2	Nguyễn Hùng Cường	0.03 s	JavaScript (SpiderMonkey)	2018-07-27 06:34:53
3	Christian Pilegaard Cederquist	0.03 s	JavaScript (SpiderMonkey)	2023-06-06 07:24:42
4	Andrew Stoute	0.03 s	JavaScript (SpiderMonkey)	2023-11-09 19:45:13

#	User	Runtime	Language	Date
1	Timothy Gaede	0.52 s	Julia	2024-05-27 03:53:47

#	User	Runtime	Language	Date
1	Hidden user	0.14 s	Kotlin	2020-04-30 01:29:24
2	Adam Rankin	0.27 s	Kotlin	2023-09-01 04:55:39
3	Troy Warmboe	0.28 s	Kotlin	2023-04-14 20:55:08
4	Dayan Ruben Gonzalez	0.29 s	Kotlin	2020-10-11 01:19:13
5	Benjamin Laurence Erickson	0.30 s	Kotlin	2022-11-08 16:33:57
6	Ali M. Nekoh	0.31 s	Kotlin	2025-06-05 09:16:10
7	Dmitry Shostak	0.32 s	Kotlin	2019-09-22 16:00:18
8	Alexandre Conte	0.32 s	Kotlin	2021-08-22 10:10:24

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Nim	2025-05-22 07:06:22

#	User	Runtime	Language	Date
1	Ludovic Mignot	0.01 s	OCaml	2020-07-06 09:50:37

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2018-09-25 10:22:17

#	User	Runtime	Language	Date
1	陳建宏	0.01 s	PHP	2021-06-10 04:34:38

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.02 s	Prolog	2018-12-06 18:52:31
2	Joakim Blikstad	0.03 s	Prolog	2017-04-12 21:34:57

#	User	Runtime	Language	Date
1	Matt Bonsall	0.04 s	Python 2	2017-02-26 21:40:29
2	Isaac Lee	0.04 s	Python 2	2017-03-01 23:26:32
3	Sigurður Jens Albertsson	0.04 s	Python 2	2017-11-08 13:05:21
4	Andrei Stoica	0.04 s	Python 2	2017-12-19 10:44:53
5	Sam Thomas	0.04 s	Python 2	2018-09-25 22:42:42
6	Lim Hong Hui Eugene	0.04 s	Python 2	2019-04-25 01:55:38
7	Christofer Ohlsson	0.05 s	Python 2	2017-02-14 20:46:37
8	Hidden user	0.05 s	Python 2	2017-04-12 09:28:23
9	Darshan Patel	0.05 s	Python 2	2017-10-01 03:54:57
10	Michael Marzullo	0.05 s	Python 2	2018-09-15 20:17:48

#	User	Runtime	Language	Date
1	Isaac Lee	0.02 s	Python 3	2017-03-01 23:24:26
2	Sarah Harvey	0.02 s	Python 3	2017-03-05 06:41:43
3	Ram Basnet	0.02 s	Python 3	2017-03-09 00:33:07
4	Josenildo Silva	0.02 s	Python 3	2017-07-08 21:57:27
5	Arjun Blum	0.02 s	Python 3	2017-09-26 22:49:20
6	Brian Nguyen	0.02 s	Python 3	2017-09-26 23:39:19
7	Punnavit Akkarapitakchai	0.02 s	Python 3	2017-09-26 23:43:28
8	Nick Jarvis	0.02 s	Python 3	2017-10-04 23:08:43
9	Ryan Florida	0.02 s	Python 3	2017-10-28 23:06:31
10	Ive Xu	0.02 s	Python 3	2017-12-18 15:13:04

#	User	Runtime	Language	Date
1	Anthony Lam	0.03 s	Ruby	2017-10-07 05:42:16
2	Hidden user	0.04 s	Ruby	2017-02-14 16:43:35
3	Thomas Feld	0.07 s	Ruby	2023-02-13 14:16:29
4	Russell Ng	0.07 s	Ruby	2025-05-23 19:37:30

#	User	Length	Language	Date
1	Max NC	52	APL	2023-09-13 09:00:35
2	Thomas Feld	59	APL	2023-09-12 10:56:56

#	User	Length	Language	Date
1	Thomas Feld	72	Bash	2023-09-12 10:04:14

#	User	Length	Language	Date
1	Eduardo Núñez	144	C	2024-03-01 23:25:10
2	Hidden user	147	C	2025-01-29 18:19:11
3	Hidden user	227	C	2019-08-04 03:07:31
4	Sebastian Pucher	255	C	2022-07-15 20:22:21
5	Sujan Roy	272	C	2020-04-28 10:23:28
6	Ng Wei Jie	275	C	2020-02-17 17:46:12
7	Magnus Hegdahl	283	C	2020-07-29 21:52:56
8	Jón Steinn Elíasson	287	C	2017-06-14 15:20:40
9	Brian Spain	287	C	2017-11-11 00:35:41
10	Ralph Martin Montero	287	C	2018-03-26 12:30:00

#	User	Length	Language	Date
1	Håkan Sjöström	577	C#	2021-11-18 12:49:33
2	Daniel Fennhagen	616	C#	2019-09-18 12:32:01
3	Hakan Yurt	764	C#	2023-03-27 13:28:53
4	Leandro de Gonzaga Peres	842	C#	2023-02-15 19:40:23
5	Jwan Resho	845	C#	2025-04-03 05:44:42
6	Danish Ali	849	C#	2025-06-28 14:52:33
7	Sebastian Sternberg	851	C#	2021-02-20 20:16:09
8	Саттар Имамов	861	C#	2017-11-02 22:54:41
9	Hidden user	971	C#	2017-09-07 16:05:10
10	Jeremiah A. Stringer	978	C#	2017-09-20 18:42:42

#	User	Length	Language	Date
1	Tyler Fernando	212	C++	2022-11-07 02:11:14
2	Way Tan	222	C++	2018-12-03 17:13:38
3	Austin Fernandez	227	C++	2019-07-30 16:37:00
4	Shafquat Mahbub	233	C++	2020-07-21 14:18:19
5	Cristhian Yamith Cely Oliveros	235	C++	2024-03-25 20:34:26
6	Amanual Degu	241	C++	2022-08-29 13:57:19
7	Nasis Dereje	244	C++	2022-08-05 13:48:55
8	Keefe Johnson	255	C++	2017-05-30 07:23:27
9	Timothy Wan Kai Yang	258	C++	2022-10-08 01:25:13
10	Christian Yongwhan Lim	261	C++	2023-06-16 21:24:08

#	User	Length	Language	Date
1	David Cawthon	1125	Common Lisp	2019-05-25 15:20:00

#	User	Length	Language	Date
1	Hidden user	893	F#	2022-07-21 16:38:16

#	User	Length	Language	Date
1	Norbert Voelker	552	Go	2021-03-28 18:45:33
2	Carl Mårshagen	575	Go	2018-06-12 22:55:04
3	Hidden user	663	Go	2025-01-11 23:38:19
4	Husain Satan	908	Go	2023-12-02 10:38:38
5	Peter Sutherland	918	Go	2018-06-19 20:47:06
6	Magix	1502	Go	2020-09-18 11:36:09
7	Christian Vestergaard	1540	Go	2021-05-02 17:15:24

#	User	Length	Language	Date
1	Fabian Mitterwallner	115	Haskell	2025-02-05 01:19:46
2	Udo Stenzel	161	Haskell	2023-04-29 22:32:04
3	Hidden user	221	Haskell	2022-12-27 12:00:08
4	Sebastian Banert	292	Haskell	2023-04-23 13:35:08
5	Brent Yorgey	339	Haskell	2017-11-08 02:59:35
6	Erik Olof Ossian Eriksson	348	Haskell	2023-01-19 15:39:19
7	Emanuel Särnhammar	408	Haskell	2022-06-18 14:51:39
8	César Antonio Carvajal de la Haza	409	Haskell	2017-04-25 14:26:38
9	Agus Sentosa Hermawan	437	Haskell	2021-11-26 11:40:50
10	Patrik Lilja	489	Haskell	2017-06-27 19:36:14

#	User	Length	Language	Date
1	Maki Nishikino	402	Java	2018-09-27 18:44:53
2	Doug Goodman	411	Java	2017-09-22 21:47:04
3	Sathvik Kuthuru	420	Java	2018-09-27 19:20:29
4	Andre Le	470	Java	2017-10-05 08:30:15
5	Mitch Price	497	Java	2017-02-26 20:39:38
6	Nam Phan Thành	518	Java	2018-07-27 07:34:17
7	Jiru Xu	519	Java	2017-09-17 02:32:03
8	Sơn Phạm Huỳnh	536	Java	2018-07-27 08:32:26
9	Tyler Pittenger	557	Java	2022-01-05 07:58:11
10	Jayson Rook	559	Java	2017-10-04 22:38:46

#	User	Length	Language	Date
1	Peter D'Elia	781	JavaScript (Node.js)	2023-11-10 16:14:28
2	Sander Hellesø	796	JavaScript (Node.js)	2019-04-20 06:30:22
3	Peter Kedemo	821	JavaScript (Node.js)	2020-01-02 17:28:14
4	Wee Jong Cheong	2594	JavaScript (Node.js)	2021-04-01 14:04:35

#	User	Length	Language	Date
1	Nguyễn Hùng Cường	306	JavaScript (SpiderMonkey)	2018-07-27 08:27:46
2	Bjørn Chr. Soltvedt	316	JavaScript (SpiderMonkey)	2017-02-20 03:11:58
3	Christian Pilegaard Cederquist	943	JavaScript (SpiderMonkey)	2023-06-06 07:24:42
4	Andrew Stoute	1172	JavaScript (SpiderMonkey)	2023-11-09 19:45:13

#	User	Length	Language	Date
1	Timothy Gaede	803	Julia	2024-05-27 03:53:47

#	User	Length	Language	Date
1	Adam Rankin	286	Kotlin	2023-09-01 04:55:39
2	Dmitry Shostak	481	Kotlin	2019-09-22 16:00:18
3	Dayan Ruben Gonzalez	536	Kotlin	2020-10-11 01:19:13
4	Benjamin Laurence Erickson	573	Kotlin	2022-11-08 16:33:57
5	Alexandre Conte	629	Kotlin	2021-08-22 10:10:24
6	Ali M. Nekoh	896	Kotlin	2025-06-05 09:16:10
7	Troy Warmboe	919	Kotlin	2023-04-14 20:55:08
8	Hidden user	1325	Kotlin	2020-04-30 01:29:24

#	User	Length	Language	Date
1	Hidden user	535	Nim	2025-05-22 07:06:22

#	User	Length	Language	Date
1	Ludovic Mignot	984	OCaml	2020-07-06 09:56:24

#	User	Length	Language	Date
1	Ingemar Ragnemalm	994	Pascal	2018-09-25 10:22:17

#	User	Length	Language	Date
1	陳建宏	469	PHP	2021-06-10 04:34:38

#	User	Length	Language	Date
1	Andriy Zyevakov	591	Prolog	2018-12-06 18:52:31
2	Joakim Blikstad	1347	Prolog	2017-04-12 21:34:57

#	User	Length	Language	Date
1	Thomas Feld	144	Python 2	2019-09-26 10:33:28
2	Johan Lyts	171	Python 2	2019-08-02 13:00:01
3	Matt Bonsall	241	Python 2	2017-02-26 21:40:29
4	Lim Hong Hui Eugene	266	Python 2	2019-04-25 01:55:38
5	William Gan	267	Python 2	2017-12-19 02:23:46
6	Christofer Ohlsson	289	Python 2	2017-02-14 20:46:37
7	Michael Marzullo	289	Python 2	2018-09-15 20:17:48
8	Jesper Öqvist	296	Python 2	2018-10-30 09:49:59
9	Ethan Arnold	302	Python 2	2017-09-15 23:26:30
10	Ethan Arnold	302	Python 2	2017-09-17 03:37:53

#	User	Length	Language	Date
1	Christopher Kopp	93	Python 3	2023-03-02 19:57:31
2	Ahmed Chamseddine	106	Python 3	2025-06-12 10:28:44
3	Guk Yi Siong	107	Python 3	2023-01-06 16:35:03
4	Casper Rysgaard	122	Python 3	2023-12-03 12:05:03
5	Noah Hessen Bjerke	123	Python 3	2023-01-03 17:04:47
6	Charles Ancheta	123	Python 3	2023-03-25 21:13:51
7	Rafael Kristoforus Yanto	123	Python 3	2025-02-21 03:32:45
8	Tai Tze Kin	125	Python 3	2024-05-11 09:37:02
9	Jason Cannon	137	Python 3	2019-12-05 03:52:34
10	Farzam Abrishami	142	Python 3	2023-12-26 19:47:33

#	User	Length	Language	Date
1	Thomas Feld	87	Ruby	2023-02-13 14:16:29
2	Russell Ng	91	Ruby	2025-05-23 19:37:30
3	Hidden user	365	Ruby	2017-02-14 16:43:35
4	Anthony Lam	805	Ruby	2017-10-07 05:42:16

#	User	Length	Language	Date
1	Hidden user	551	Rust	2025-04-03 20:39:52
2	Bas Dirks	619	Rust	2022-01-19 06:29:41
3	Josip Smolcic	620	Rust	2023-04-29 22:17:02
4	Hidden user	647	Rust	2025-12-30 17:47:05
5	Artur Khuziakhmetov	692	Rust	2022-07-24 07:07:22
6	Adam Gausmann	732	Rust	2022-12-27 03:50:02
7	David Zacek	791	Rust	2021-12-26 22:57:05
8	Thobias Larsen	822	Rust	2023-02-01 10:38:05
9	Melvyn Depeyrot	1174	Rust	2025-01-10 00:39:15
10	Arvid Rehnberg	1175	Rust	2025-01-17 21:13:47

Solution running time distribution