Problem A
Secret Message — Problem Statistics

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Submissions	10488
Accepted submissions	5576
Submission ratio	53.17%
Authors	5078
Full solves [?]	4724
Full solve Ratio	93.03%

#	User	Runtime	Language	Date
1	Chenzhang Hu	0.10 s	Bash	2024-04-16 16:09:24

#	User	Runtime	Language	Date
1	Piotr Karpala	0.02 s	C#	2015-10-03 16:28:50
2	Marcin Dudek	0.02 s	C#	2015-10-04 21:14:32
3	Deni Spasovski	0.02 s	C#	2015-10-12 00:29:41
4	Khin Nyunt	0.02 s	C#	2016-01-24 05:13:57
5	Faisal Rahman	0.02 s	C#	2016-03-11 14:19:38
6	Joe Amenta	0.02 s	C#	2016-04-04 20:08:22
7	Piotr Karpala	0.02 s	C#	2016-09-26 03:41:28
8	Rail Sabirov	0.02 s	C#	2016-10-11 10:06:34
9	Стас Иванов	0.02 s	C#	2016-10-26 19:31:44
10	Moo	0.02 s	C#	2017-07-13 20:35:47

#	User	Runtime	Language	Date
1	David Cawthon	0.07 s	Common Lisp	2019-05-10 13:54:56

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.04 s	F#	2022-09-17 21:00:05

#	User	Runtime	Language	Date
1	Raj Shekhar	0.02 s	Go	2020-12-13 17:37:48
2	Nicklesh	0.02 s	Go	2020-12-13 22:46:38
3	Péter Szakszon	0.02 s	Go	2022-01-17 19:09:48
4	Norbert Voelker	0.09 s	Go	2021-04-23 23:57:08
5	Michael Laszlo	0.10 s	Go	2016-10-12 00:30:33
6	Nathan Lee	0.35 s	Go	2025-09-06 20:45:55
7	Kyle Weaver	0.48 s	Go	2018-11-04 03:11:05
8	Marcin Dudek	0.52 s	Go	2016-09-21 19:54:11
9	Hidden user	0.55 s	Go	2016-05-28 19:32:39
10	Joel Gritter	0.55 s	Go	2021-12-30 16:23:09

#	User	Runtime	Language	Date
1	Tim Put	0.02 s	Haskell	2019-09-17 02:02:41
2	Caleb Surovik	0.02 s	Haskell	2021-07-12 03:53:30
3	Carl Agrell	0.04 s	Haskell	2016-09-29 18:04:09
4	Intrets	0.04 s	Haskell	2019-08-26 17:15:31
5	Steinar Simonnes	0.04 s	Haskell	2024-01-31 08:17:50
6	Mitchell Wright	0.05 s	Haskell	2019-09-14 03:07:36
7	Ola Berglund	0.05 s	Haskell	2024-11-17 20:46:39
8	Max Jackson	0.06 s	Haskell	2016-05-01 16:40:30
9	Peter Deal	0.06 s	Haskell	2016-05-06 23:49:41
10	Tobias Glimmerfors	0.06 s	Haskell	2020-01-26 12:39:35

#	User	Runtime	Language	Date
1	Petr Ryšavý	0.10 s	Java	2015-10-03 19:09:12
2	Jorge Andres Moreno Mera	0.10 s	Java	2017-08-24 07:33:25
3	Johnny Tan	0.11 s	Java	2015-10-03 19:09:14
4	Andy Rock	0.11 s	Java	2015-10-03 19:27:30
5	Matthew Bregg	0.11 s	Java	2015-10-03 20:26:29
6	Eskil Jarlskog	0.11 s	Java	2016-01-26 12:36:38
7	Martijn Muijsers	0.11 s	Java	2016-09-25 14:43:21
8	William Brigham	0.11 s	Java	2017-04-24 09:05:39
9	Oliver Stenberg Jakobsen	0.11 s	Java	2017-10-10 22:50:20
10	Sven Rönnbäck	0.11 s	Java	2021-01-18 21:20:22

#	User	Runtime	Language	Date
1	Thatcher Healy	0.10 s	JavaScript (Node.js)	2025-09-25 18:13:10
2	Dag Jomar Mersland	0.44 s	JavaScript (Node.js)	2019-10-28 00:10:56
3	Niamh Limerick	0.44 s	JavaScript (Node.js)	2022-02-04 02:09:19
4	Noah Witte	0.44 s	JavaScript (Node.js)	2022-04-09 04:23:02
5	Chris Wong	0.47 s	JavaScript (Node.js)	2021-02-19 22:05:36
6	Keaton Robel	0.47 s	JavaScript (Node.js)	2022-04-07 03:54:18
7	Andoko Chandra	0.48 s	JavaScript (Node.js)	2020-10-11 14:22:53
8	Hidden user	0.49 s	JavaScript (Node.js)	2020-11-18 01:18:28
9	Khin Nyunt	0.52 s	JavaScript (Node.js)	2021-11-29 15:58:06

#	User	Runtime	Language	Date
1	Rofel Ganado	0.03 s	JavaScript (SpiderMonkey)	2016-01-27 04:57:37
2	Zachary DeStefano	0.03 s	JavaScript (SpiderMonkey)	2018-02-07 00:31:32
3	Arend van Erk	0.04 s	JavaScript (SpiderMonkey)	2015-10-18 18:19:52
4	Peter Kedemo	0.04 s	JavaScript (SpiderMonkey)	2015-12-18 21:10:00
5	Bjørn Chr. Soltvedt	0.04 s	JavaScript (SpiderMonkey)	2016-01-16 15:47:00
6	Stanislav Bivolarski	0.04 s	JavaScript (SpiderMonkey)	2017-04-14 18:18:39
7	Peter Menyes	0.04 s	JavaScript (SpiderMonkey)	2017-08-26 15:11:46
8	Davíð Helgason	0.04 s	JavaScript (SpiderMonkey)	2019-06-20 22:54:17
9	Jimmy Gustafsson	0.04 s	JavaScript (SpiderMonkey)	2024-07-19 23:52:31
10	Evan Magill	0.04 s	JavaScript (SpiderMonkey)	2024-11-24 20:11:55

#	User	Runtime	Language	Date
1	Timothy Gaede	0.73 s	Julia	2024-05-11 08:58:50

#	User	Runtime	Language	Date
1	Johnny Baloney	0.21 s	Kotlin	2021-12-08 16:42:49
2	Jacob Huebner	0.23 s	Kotlin	2020-03-17 05:02:18
3	Ronald Cruz	0.24 s	Kotlin	2017-12-09 02:13:41
4	Dmitry Shostak	0.24 s	Kotlin	2018-06-21 18:36:45
5	Adam Rankin	0.31 s	Kotlin	2023-08-26 01:07:12
6	Neil Harmon	0.36 s	Kotlin	2019-05-06 11:18:25
7	Troy Warmboe	0.44 s	Kotlin	2020-02-11 01:55:48
8	Orlando de Andrade Figueiredo	0.46 s	Kotlin	2020-08-29 01:58:47
9	Philipp Maksimov	0.56 s	Kotlin	2020-04-25 16:37:11
10	Thanh Le	0.84 s	Kotlin	2021-08-07 17:23:36

#	User	Runtime	Language	Date
1	Shehab Ahmed Hatem	0.12 s	Lua	2023-11-29 21:14:19
2	Caleb Austin	0.17 s	Lua	2024-08-24 00:12:13

#	User	Runtime	Language	Date
1	Sebastian Banert	0.01 s	OCaml	2024-07-19 18:46:06
2	Hidden user	0.02 s	OCaml	2023-12-29 19:07:56

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Odin	2025-06-10 22:47:40

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.01 s	Pascal	2017-08-08 23:51:05
2	David Connolly	0.02 s	Pascal	2017-08-23 17:42:27
3	Hidden user	0.02 s	Pascal	2019-09-30 04:43:51

#	User	Runtime	Language	Date
1	Renate	0.02 s	PHP	2021-11-13 23:14:59
2	Steven D. Wilson	0.03 s	PHP	2016-03-25 17:55:07
3	Silvena Lam	0.04 s	PHP	2016-02-10 13:29:38
4	Rakibul Hassan	0.05 s	PHP	2021-01-18 02:06:29
5	Hidden user	0.06 s	PHP	2018-02-23 21:15:11
6	Connor Billings	0.13 s	PHP	2019-12-31 22:59:53
7	Alessandro Pasqualini	0.23 s	PHP	2019-01-13 13:15:19
8	Nicolas Marsceau	0.25 s	PHP	2016-08-26 21:52:08

#	User	Runtime	Language	Date
1	Hakan Kjellerstrand	0.32 s	Prolog	2023-02-06 10:32:52

#	User	Runtime	Language	Date
1	Snild Dolkow	0.03 s	Python 2	2015-10-04 08:05:29
2	Asger Hautop Drewsen	0.03 s	Python 2	2015-11-03 21:09:50
3	Jie Liang Lee	0.04 s	Python 2	2015-10-03 18:37:27
4	Caleb Bryant	0.04 s	Python 2	2015-10-03 19:14:24
5	Franck Nijimbere	0.04 s	Python 2	2015-10-03 21:40:30
6	Martin Sundin	0.04 s	Python 2	2016-04-14 14:57:11
7	Syafiq Al Atiiq	0.04 s	Python 2	2016-07-12 17:43:31
8	Ho Yin Ng	0.04 s	Python 2	2016-09-21 06:39:31
9	Sala Gabriel	0.04 s	Python 2	2017-05-09 21:23:49
10	Sergey Pashkovsky	0.04 s	Python 2	2017-11-21 20:44:19

#	User	Runtime	Language	Date
1	Daniel Worsnup	0.02 s	Python 3	2016-04-21 22:09:23
2	Christian Lindeström	0.02 s	Python 3	2016-09-07 22:47:36
3	Arash Rai	0.02 s	Python 3	2016-09-24 06:34:04
4	Brett Stevenson	0.02 s	Python 3	2018-02-11 09:13:03
5	Cheng Hang	0.02 s	Python 3	2018-03-28 09:51:17
6	Matthew Kan	0.02 s	Python 3	2018-05-21 14:39:49
7	Cody Gramlich	0.02 s	Python 3	2018-06-02 21:05:12
8	Hidden user	0.02 s	Python 3	2019-01-03 07:38:56
9	Tyge Tiessen	0.02 s	Python 3	2019-04-12 22:51:09
10	Muhammad Natsir	0.02 s	Python 3	2019-08-01 10:00:44

#	User	Runtime	Language	Date
1	Jinwoo Lee	0.14 s	Racket	2025-02-01 07:45:44

#	User	Runtime	Language	Date
1	Macdara mac an tSionnaigh	0.09 s	Ruby	2019-10-05 19:43:36
2	Hidden user	0.11 s	Ruby	2017-05-10 08:22:23
3	Régis Hanol	0.11 s	Ruby	2022-01-19 16:57:56
4	Lara Hoya Trujillo	0.12 s	Ruby	2019-11-17 18:32:16
5	Patricia Gao	0.13 s	Ruby	2020-01-24 11:56:46
6	Gerry Hall	0.14 s	Ruby	2016-03-27 21:42:05
7	Troy Sornson	0.15 s	Ruby	2022-01-20 01:04:28
8	Clement Oh	0.16 s	Ruby	2024-03-19 13:02:07
9	Casper Christensen	0.18 s	Ruby	2016-01-01 23:32:09
10	Hidden user	0.18 s	Ruby	2019-11-10 18:47:04

#	User	Runtime	Language	Date
1	Chaoyi Yin	0.00 s	Rust	2019-01-06 21:04:38
2	Chen Weikang	0.00 s	Rust	2019-01-06 21:12:29
3	Isak Jägberg	0.00 s	Rust	2022-01-17 19:22:47
4	Hidden user	0.00 s	Rust	2024-06-30 22:59:39
5	Vincent Lagerros	0.00 s	Rust	2024-12-04 19:11:08
6	Joe Blower	0.00 s	Rust	2025-06-12 21:33:23
7	David Rasch	0.01 s	Rust	2020-07-29 13:49:42
8	Bas Dirks	0.01 s	Rust	2022-01-30 10:51:01
9	Garrett Rowe	0.01 s	Rust	2022-05-31 07:34:48
10	Egor Kulikov	0.01 s	Rust	2024-11-28 13:59:39

#	User	Length	Language	Date
1	Chenzhang Hu	1720	Bash	2024-04-16 16:09:24

#	User	Length	Language	Date
1	Martin Blom	237	C	2024-07-20 20:14:43
2	Anthony Clark	423	C	2017-11-17 18:00:06
3	Hidden user	449	C	2017-07-16 15:26:21
4	Hidden user	494	C	2018-05-14 21:49:06
5	Matthew Johnson	504	C	2015-10-03 18:38:29
6	Minh Tuấn	506	C	2016-03-06 12:39:28
7	Tomáš Drtina	514	C	2015-10-03 18:51:07
8	Seth Carter	531	C	2018-05-29 19:49:29
9	Sujan Roy	538	C	2020-05-07 09:49:22
10	Johan Öhlin	544	C	2017-08-29 13:07:16

#	User	Length	Language	Date
1	Hidden user	557	C#	2024-03-11 00:54:50
2	Anthony Ye	592	C#	2023-01-08 18:23:09
3	Göran Andersson	605	C#	2022-05-14 20:06:33
4	Kunwei Zhang	628	C#	2019-05-06 15:53:03
5	Esty Crow	634	C#	2023-01-03 18:32:18
6	Thomas Norris	695	C#	2019-06-24 09:19:06
7	Pontus Magnusson	786	C#	2016-06-10 11:03:23
8	Khin Nyunt	853	C#	2016-01-24 05:13:57
9	Paweł Borkowski	875	C#	2020-03-04 19:46:47
10	Benjamin Iserman	901	C#	2021-11-11 02:27:46

#	User	Length	Language	Date
1	son le thanh	290	C++	2020-11-23 08:37:31
2	Brandon Fuller	331	C++	2019-09-17 01:23:05
3	Mugeon Kim	337	C++	2024-02-10 12:47:11
4	官毓韋	339	C++	2018-11-27 05:58:34
5	Lee Bing Heng	349	C++	2022-11-20 11:37:32
6	Johan Wind	358	C++	2015-12-01 19:53:47
7	Ariel García Morán	363	C++	2018-01-03 17:16:00
8	Kevin Sun	369	C++	2015-10-04 03:24:52
9	Hongbo Zhang	371	C++	2015-10-03 19:40:31
10	David Venhoek	376	C++	2016-01-04 14:07:42

#	User	Length	Language	Date
1	David Cawthon	1205	Common Lisp	2019-05-10 13:54:56

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	935	F#	2022-09-17 21:00:05

#	User	Length	Language	Date
1	Kyle Weaver	432	Go	2018-11-04 03:11:05
2	Krzysztof Gibuła	529	Go	2019-03-05 23:43:06
3	Marcin Dudek	533	Go	2016-09-21 19:51:27
4	Hidden user	618	Go	2016-05-28 19:32:39
5	Nicklesh	675	Go	2020-12-14 15:55:06
6	Cameron Brill	694	Go	2022-02-23 20:27:13
7	Michael Laszlo	937	Go	2016-10-12 00:30:33
8	Joel Gritter	939	Go	2021-12-30 16:23:09
9	Nathan Lee	960	Go	2025-09-06 20:45:55
10	Raj Shekhar	1006	Go	2020-12-13 17:37:48

#	User	Length	Language	Date
1	Lars Tveito	326	Haskell	2016-01-06 01:09:35
2	Brent Yorgey	423	Haskell	2017-10-03 05:55:23
3	Lieven Marchand	455	Haskell	2017-09-16 21:59:27
4	Li Jun	456	Haskell	2023-07-02 18:19:03
5	Hidden user	460	Haskell	2019-08-25 10:33:02
6	Anthony Clays	482	Haskell	2016-12-04 21:37:44
7	Carl Agrell	494	Haskell	2016-09-29 18:04:09
8	Aurélien Pepin	520	Haskell	2019-09-07 10:24:45
9	Consuelo Gómez Gómez	524	Haskell	2017-04-22 15:31:15
10	Andreas Ländle	526	Haskell	2020-06-14 11:26:13

#	User	Length	Language	Date
1	Harrison Weigel	536	Java	2015-10-03 18:51:04
2	Anton Pirogov	545	Java	2015-11-24 22:29:09
3	Chandler Griscom	557	Java	2015-10-03 20:18:18
4	Logan Su	574	Java	2015-10-03 18:57:38
5	Benjamin Laurence Erickson	574	Java	2016-08-31 06:25:22
6	Samuel Klingström	577	Java	2017-03-04 00:42:01
7	Sam Heil	582	Java	2016-09-22 04:36:30
8	Tae Ho Kim	592	Java	2019-11-14 23:29:34
9	Nathan Gossett	595	Java	2018-05-08 19:38:04
10	Travis Meade	596	Java	2018-01-05 19:36:58

#	User	Length	Language	Date
1	Noah Witte	678	JavaScript (Node.js)	2022-04-09 04:23:02
2	Chris Wong	747	JavaScript (Node.js)	2021-02-19 22:05:36
3	Thatcher Healy	947	JavaScript (Node.js)	2025-09-25 18:13:10
4	Andoko Chandra	974	JavaScript (Node.js)	2020-10-11 14:22:53
5	Niamh Limerick	1108	JavaScript (Node.js)	2022-02-04 02:09:19
6	Keaton Robel	1197	JavaScript (Node.js)	2022-04-07 03:54:18
7	Khin Nyunt	1414	JavaScript (Node.js)	2021-11-29 15:58:06
8	Hidden user	2681	JavaScript (Node.js)	2020-11-18 01:18:28
9	Dag Jomar Mersland	3777	JavaScript (Node.js)	2019-10-28 00:10:56

#	User	Length	Language	Date
1	Jimmy Gustafsson	167	JavaScript (SpiderMonkey)	2024-07-19 23:52:31
2	Evan Magill	335	JavaScript (SpiderMonkey)	2024-11-24 20:11:55
3	Peter Menyes	378	JavaScript (SpiderMonkey)	2017-08-26 17:18:04
4	Zachary DeStefano	399	JavaScript (SpiderMonkey)	2018-02-07 00:31:32
5	Bjørn Chr. Soltvedt	452	JavaScript (SpiderMonkey)	2016-01-16 15:47:00
6	Peter Kedemo	525	JavaScript (SpiderMonkey)	2015-12-18 21:10:00
7	J M	651	JavaScript (SpiderMonkey)	2016-11-12 16:34:38
8	Johannes Strelen	683	JavaScript (SpiderMonkey)	2018-12-07 15:58:13
9	Tim Oram	719	JavaScript (SpiderMonkey)	2016-03-18 21:28:15
10	Rofel Ganado	783	JavaScript (SpiderMonkey)	2016-01-27 04:57:37

#	User	Length	Language	Date
1	Timothy Gaede	844	Julia	2024-05-11 08:58:50

#	User	Length	Language	Date
1	Ronald Cruz	631	Kotlin	2017-12-09 02:13:41
2	Aldinata	658	Kotlin	2020-12-04 10:59:23
3	Ashish Singh	752	Kotlin	2023-02-01 08:06:15
4	Adam Rankin	764	Kotlin	2023-08-26 01:07:12
5	Dmitry Shostak	784	Kotlin	2018-06-21 18:36:45
6	Jacob Huebner	908	Kotlin	2020-03-17 05:02:18
7	Neil Harmon	1042	Kotlin	2019-05-06 11:18:25
8	Johnny Baloney	1057	Kotlin	2021-12-08 16:42:49
9	Philipp Maksimov	1128	Kotlin	2020-04-25 16:37:11
10	Orlando de Andrade Figueiredo	1559	Kotlin	2020-08-29 01:58:47

#	User	Length	Language	Date
1	Shehab Ahmed Hatem	916	Lua	2023-11-29 21:14:19
2	Caleb Austin	1267	Lua	2024-08-24 00:12:13

#	User	Length	Language	Date
1	Sebastian Banert	531	OCaml	2024-07-19 18:47:03
2	Hidden user	1224	OCaml	2023-12-29 19:07:56

#	User	Length	Language	Date
1	Hidden user	1280	Odin	2025-06-10 22:47:40

#	User	Length	Language	Date
1	Ingemar Ragnemalm	586	Pascal	2017-08-08 23:51:05
2	Hidden user	697	Pascal	2019-09-30 04:43:51
3	David Connolly	734	Pascal	2017-08-23 17:42:27

#	User	Length	Language	Date
1	Hidden user	552	PHP	2018-02-23 21:15:11
2	Connor Billings	569	PHP	2019-12-31 22:59:53
3	Rakibul Hassan	574	PHP	2021-01-18 02:06:29
4	Steven D. Wilson	697	PHP	2016-03-25 17:55:07
5	Renate	707	PHP	2021-11-13 23:14:59
6	Nicolas Marsceau	1101	PHP	2016-08-26 21:52:08
7	Alessandro Pasqualini	1110	PHP	2019-01-13 13:15:19
8	Silvena Lam	1305	PHP	2016-02-10 13:29:38

#	User	Length	Language	Date
1	Hakan Kjellerstrand	714	Prolog	2023-02-06 10:32:52

#	User	Length	Language	Date
1	Justin Su	214	Python 2	2019-09-14 08:41:15
2	Thomas Feld	225	Python 2	2019-08-19 13:05:04
3	Ted Ying	247	Python 2	2015-10-03 18:33:38
4	Asger Hautop Drewsen	260	Python 2	2015-11-03 21:09:50
5	Yan Kalchevsky	260	Python 2	2017-01-17 20:32:27
6	Mang Saswi	267	Python 2	2016-01-06 16:29:21
7	Johannes Agestam	270	Python 2	2015-10-13 23:29:11
8	Jeff Robertson	285	Python 2	2017-08-17 20:27:56
9	Jesper Öqvist	294	Python 2	2018-10-24 18:54:58
10	Hasan Ramezani	299	Python 2	2016-06-17 12:59:48

#	User	Length	Language	Date
1	Gustav Elmqvist	137	Python 3	2023-02-13 16:54:14
2	Alexandre Charland	139	Python 3	2024-09-05 14:41:41
3	Hidden user	143	Python 3	2024-05-09 11:42:47
4	Tai Tze Kin	149	Python 3	2024-05-02 23:25:49
5	Lawry Sorenson	173	Python 3	2023-06-10 00:06:00
6	Ahmed Chamseddine	180	Python 3	2024-07-19 10:27:20
7	Daniel Worsnup	181	Python 3	2016-04-21 22:09:23
8	William Chorkawy	187	Python 3	2023-03-25 10:46:58
9	Thibault Raffaillac	195	Python 3	2023-08-14 11:53:38
10	Charles Ancheta	196	Python 3	2023-04-10 21:43:03

#	User	Length	Language	Date
1	Jinwoo Lee	626	Racket	2025-02-01 07:45:44

#	User	Length	Language	Date
1	Thomas Feld	96	Ruby	2022-11-25 12:02:52
2	Clement Oh	196	Ruby	2024-03-19 13:22:40
3	Régis Hanol	238	Ruby	2022-01-19 16:57:56
4	Casper Christensen	276	Ruby	2016-01-01 23:32:09
5	Macdara mac an tSionnaigh	287	Ruby	2019-10-05 19:43:36
6	Hidden user	328	Ruby	2019-03-19 11:53:12
7	Erik Rydbert	392	Ruby	2016-07-07 12:04:25
8	Lara Hoya Trujillo	479	Ruby	2019-11-17 18:32:16
9	Gerry Hall	488	Ruby	2016-03-27 21:42:05
10	Lee Tze Han	502	Ruby	2018-06-29 08:59:26

#	User	Length	Language	Date
1	Vincent Lagerros	369	Rust	2024-12-04 19:11:30
2	Chaoyi Yin	596	Rust	2019-01-06 21:04:38
3	David Rasch	616	Rust	2020-07-29 13:49:42
4	Chen Weikang	684	Rust	2019-01-06 21:12:29
5	Kok Dith	780	Rust	2021-08-15 14:15:36
6	Hidden user	861	Rust	2024-12-17 23:45:03
7	Pankajkumar Patro	881	Rust	2024-12-07 14:13:58
8	Joe Blower	1197	Rust	2025-06-12 21:33:23
9	Andrea Cattaneo	1471	Rust	2024-04-06 21:33:58
10	Eric Pinter	1595	Rust	2021-11-20 04:26:24

Solution running time distribution