Problem B
Luhn's Checksum Algorithm — Problem Statistics

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Submissions	5296
Accepted submissions	2670
Submission ratio	50.42%
Authors	2549
Full solves [?]	2394
Full solve Ratio	93.92%

#	User	Runtime	Language	Date
1	Danny Robinson	0.01 s	Bash	2023-09-30 05:29:37

#	User	Runtime	Language	Date
1	Chris McGarty	0.02 s	C#	2018-10-30 18:32:20
2	Sean McGarty	0.02 s	C#	2018-10-31 15:27:42
3	Martin Wallgren	0.02 s	C#	2018-11-28 08:14:02
4	Eric Bäckhage	0.02 s	C#	2019-02-15 20:51:10
5	Mehdi Adelzadeh	0.02 s	C#	2019-06-21 21:54:23
6	Thomas Norris	0.02 s	C#	2019-09-20 16:38:10
7	Keiron Beadle	0.02 s	C#	2019-09-29 14:49:49
8	Michael Palkovics	0.02 s	C#	2019-11-10 01:26:49
9	Johan Pettersson	0.02 s	C#	2019-11-22 03:09:01
10	Sebastian Gielinger	0.02 s	C#	2019-12-12 07:26:53

#	User	Runtime	Language	Date
1	Philippos Boon Alexaki	0.01 s	Common Lisp	2019-11-18 17:01:38
2	David Cawthon	0.02 s	Common Lisp	2019-04-13 01:22:54
3	Hidden user	0.02 s	Common Lisp	2019-05-25 04:10:51
4	Hidden user	0.03 s	Common Lisp	2019-01-08 12:20:00

#	User	Runtime	Language	Date
1	Patrick Bahr	0.04 s	F#	2021-02-21 21:20:51
2	Sebastian Sternberg	0.04 s	F#	2021-08-25 17:01:50
3	Jacob Harris Cryer Kragh	0.04 s	F#	2022-06-27 15:26:59

#	User	Runtime	Language	Date
1	Anmol Sharma	0.02 s	Go	2019-11-08 11:34:46
2	Krzysztof Gibuła	0.02 s	Go	2021-05-11 16:36:29
3	Felix Fatum	0.02 s	Go	2022-09-26 11:48:16
4	William Fiset	0.07 s	Go	2018-10-27 04:40:35
5	Patrik Lilja	0.07 s	Go	2018-11-15 18:15:21
6	Eric Martin	0.07 s	Go	2018-12-24 03:32:31
7	Conor McGovern	0.07 s	Go	2019-03-09 18:49:29
8	Norbert Voelker	0.08 s	Go	2021-04-15 19:38:04

#	User	Runtime	Language	Date
1	Shinji Koshida	0.00 s	Haskell	2025-03-28 08:19:57
2	Brent Yorgey	0.01 s	Haskell	2018-10-17 12:46:50
3	Intrets	0.01 s	Haskell	2019-04-05 16:54:36
4	Matthew A Johnson	0.01 s	Haskell	2019-05-15 05:28:33
5	Isaac Arvestad	0.01 s	Haskell	2019-08-11 13:02:56
6	Hidden user	0.01 s	Haskell	2019-08-13 09:53:25
7	Rudi Svartveit	0.01 s	Haskell	2019-09-11 14:47:37
8	Mitchell Wright	0.01 s	Haskell	2020-02-19 17:53:22
9	Steinar Simonnes	0.01 s	Haskell	2020-09-03 18:57:12
10	Andrés Marzal Varó	0.01 s	Haskell	2020-10-10 15:46:13

#	User	Runtime	Language	Date
1	Guangyi Zhou	0.04 s	Java	2025-02-06 10:09:32
2	Anthony Pagnotta	0.04 s	Java	2026-02-26 05:42:11
3	Finn Lidbetter	0.05 s	Java	2018-10-17 14:23:37
4	James Black	0.05 s	Java	2018-10-22 14:54:20
5	José Vander Meulen	0.05 s	Java	2018-10-23 14:40:59
6	Morgan K Bender	0.06 s	Java	2018-10-12 16:15:54
7	Lee Wei Hong	0.06 s	Java	2018-10-18 08:59:53
8	Jason Tomkins	0.06 s	Java	2018-10-18 22:54:04
9	Lexie Nance	0.06 s	Java	2018-10-19 02:36:25
10	Kyle Kelly	0.06 s	Java	2018-10-20 14:08:50

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	JavaScript (Node.js)	2025-01-25 20:42:09
2	Thomas Harmeyer	0.09 s	JavaScript (Node.js)	2022-11-13 14:15:45
3	Jay Cruz	0.09 s	JavaScript (Node.js)	2023-05-07 09:13:16
4	Peter Kedemo	0.42 s	JavaScript (Node.js)	2020-01-01 11:49:12
5	John	0.42 s	JavaScript (Node.js)	2020-07-27 10:13:24
6	Minh Phúc Lê	0.42 s	JavaScript (Node.js)	2020-08-08 15:43:57
7	Hovhannes Kantuni	0.42 s	JavaScript (Node.js)	2020-09-02 17:56:05
8	Andoko Chandra	0.42 s	JavaScript (Node.js)	2020-10-04 07:28:43
9	Chris Wong	0.42 s	JavaScript (Node.js)	2021-02-07 12:32:01
10	Howard Tin Chi Chan	0.42 s	JavaScript (Node.js)	2021-02-13 13:13:08

#	User	Runtime	Language	Date
1	Håkan Lindahl	0.02 s	JavaScript (SpiderMonkey)	2022-06-16 20:58:49
2	Bjørn Chr. Soltvedt	0.03 s	JavaScript (SpiderMonkey)	2018-10-19 16:22:58
3	Jeremy Loh	0.03 s	JavaScript (SpiderMonkey)	2019-01-04 15:28:46
4	Casey Smith	0.03 s	JavaScript (SpiderMonkey)	2019-05-28 14:57:13
5	Nicklas Utgaard	0.03 s	JavaScript (SpiderMonkey)	2019-10-31 19:07:01
6	Rolands	0.03 s	JavaScript (SpiderMonkey)	2020-05-31 14:15:56
7	Zachary DeStefano	0.03 s	JavaScript (SpiderMonkey)	2020-09-04 01:23:45
8	Peter Menyes	0.03 s	JavaScript (SpiderMonkey)	2021-03-10 19:52:27
9	Christian Pilegaard Cederquist	0.03 s	JavaScript (SpiderMonkey)	2022-11-15 22:51:27
10	Zach Tschetter	0.03 s	JavaScript (SpiderMonkey)	2023-07-04 02:45:16

#	User	Runtime	Language	Date
1	Timothy Gaede	0.59 s	Julia	2024-06-14 02:02:05

#	User	Runtime	Language	Date
1	Ashish Singh	0.13 s	Kotlin	2023-01-28 06:42:18
2	Hidden user	0.14 s	Kotlin	2019-12-20 13:16:24
3	Johnny Baloney	0.15 s	Kotlin	2021-12-02 11:46:00
4	James WIlliams	0.17 s	Kotlin	2020-09-06 20:37:34
5	arda atci	0.19 s	Kotlin	2020-07-07 20:42:09
6	Zaw Myat	0.20 s	Kotlin	2024-01-15 02:26:45
7	Ola Sundell	0.21 s	Kotlin	2019-08-19 11:50:00
8	Sergey Jakobsen	0.21 s	Kotlin	2021-06-02 22:51:09
9	Neil Harmon	0.22 s	Kotlin	2019-04-09 13:59:09
10	Sarek Høverstad Skotåm	0.22 s	Kotlin	2020-10-10 19:16:25

#	User	Runtime	Language	Date
1	Shinji Koshida	0.00 s	Lua	2025-04-01 07:47:30

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2019-01-09 08:48:08
2	David Connolly	0.00 s	Pascal	2023-05-03 17:26:21

#	User	Runtime	Language	Date
1	Denis BAURAIN	0.01 s	Perl	2026-01-29 22:16:05

#	User	Runtime	Language	Date
1	Renate Fiala-Lundström	0.01 s	PHP	2021-07-17 15:34:11
2	Andre Wahyudi	0.01 s	PHP	2022-10-26 01:34:51

#	User	Runtime	Language	Date
1	Hakan Kjellerstrand	0.02 s	Prolog	2023-02-08 08:05:21

#	User	Runtime	Language	Date
1	Haochen Chen	0.03 s	Python 2	2018-10-21 21:06:46
2	Johann Ly	0.03 s	Python 2	2018-10-30 06:16:55
3	Eric Törnqvist	0.03 s	Python 2	2018-12-17 21:57:53
4	Andrei Stoica	0.03 s	Python 2	2019-01-16 21:56:55
5	Johan Lyts	0.03 s	Python 2	2019-02-18 21:02:04
6	Martin Tran	0.03 s	Python 2	2019-03-23 17:28:05
7	Hidden user	0.03 s	Python 2	2019-07-01 16:29:33
8	Hasan Kalzi	0.03 s	Python 2	2022-06-18 09:44:03
9	Ciara Godwin	0.04 s	Python 2	2018-10-17 14:15:14
10	Andreas Eisele	0.04 s	Python 2	2018-10-19 22:39:29

#	User	Runtime	Language	Date
1	Graeme Zinck	0.02 s	Python 3	2018-10-12 15:14:26
2	Nigel Quinn	0.02 s	Python 3	2018-10-19 23:11:47
3	Peter Beattie	0.02 s	Python 3	2018-10-23 10:37:51
4	Kevin Chen	0.02 s	Python 3	2018-11-05 02:43:59
5	Łukasz Łukaszew	0.02 s	Python 3	2018-11-24 21:04:48
6	Jakob Kallestad	0.02 s	Python 3	2018-11-25 15:13:23
7	Jacob Raymond	0.02 s	Python 3	2018-11-27 19:19:52
8	Arnav Sastry	0.02 s	Python 3	2018-11-28 02:48:48
9	João Pedro Alvito	0.02 s	Python 3	2018-12-02 14:00:11
10	Manu Lam	0.02 s	Python 3	2018-12-08 18:29:21

#	User	Runtime	Language	Date
1	Macdara mac an tSionnaigh	0.04 s	Ruby	2019-09-15 14:49:39
2	Donald Dong	0.05 s	Ruby	2018-12-30 23:17:55
3	Hidden user	0.05 s	Ruby	2019-03-05 11:56:09
4	Miorel Palii	0.06 s	Ruby	2018-11-05 04:04:37
5	Thomas Feld	0.06 s	Ruby	2022-11-08 14:17:03
6	Russell Ng	0.07 s	Ruby	2025-06-06 12:51:41

#	User	Length	Language	Date
1	Danny Robinson	93	Bash	2023-09-30 05:29:37

#	User	Length	Language	Date
1	Benjamin Iserman	173	C	2023-02-28 19:32:21
2	Ximun Castoreo	442	C	2020-07-07 13:37:21
3	Jón Steinn Elíasson	475	C	2020-03-03 10:53:37
4	SAJEEDHA.M cse	475	C	2020-08-21 12:48:03
5	Sreelakshmi G	475	C	2020-08-22 17:19:42
6	Kiley Thomas	475	C	2021-03-30 08:37:00
7	Jakob Lundkvist	475	C	2022-04-10 20:14:38
8	Khoa Ngo Duc Minh	475	C	2025-08-24 04:28:20
9	Ilhame Ben-saghroune	476	C	2021-05-06 11:21:24
10	Carrot 2221	483	C	2020-12-09 08:46:20

#	User	Length	Language	Date
1	Chris McGarty	501	C#	2018-10-30 18:40:13
2	Göran Andersson	512	C#	2022-05-10 15:44:02
3	Martin Wallgren	590	C#	2018-11-28 08:14:02
4	Esty Crow	635	C#	2023-03-30 19:46:31
5	Thomas Norris	799	C#	2019-09-20 16:38:10
6	Anthony Ye	848	C#	2023-04-02 16:30:22
7	Anton J Olsson	904	C#	2020-06-11 00:45:00
8	Գոռ Բաղդասարյան	987	C#	2026-01-07 06:38:00
9	Eric Bäckhage	1091	C#	2019-02-15 20:51:10
10	Victor Hultén Mattsson	1109	C#	2022-06-20 09:33:34

#	User	Length	Language	Date
1	Anna Roczek	308	C++	2023-07-11 11:54:24
2	Jalvin Chan Jia Xiang	345	C++	2020-04-06 13:33:48
3	Hidden user	346	C++	2020-02-29 21:27:20
4	William Gan	349	C++	2018-12-04 12:55:29
5	Ritchie Goldwin	366	C++	2018-12-27 14:11:32
6	Markus Mathiasen	370	C++	2021-07-03 08:40:22
7	Jerome Leow	378	C++	2020-12-24 06:56:03
8	妹様万歳	380	C++	2020-03-23 14:06:27
9	Jordan Quah Shao Xuan	385	C++	2022-12-08 08:18:38
10	Austin Fernandez	387	C++	2019-08-03 17:11:19

#	User	Length	Language	Date
1	David Cawthon	524	Common Lisp	2019-04-13 01:22:54
2	Hidden user	576	Common Lisp	2019-05-25 04:10:51
3	Philippos Boon Alexaki	689	Common Lisp	2019-11-18 17:01:38
4	Hidden user	1170	Common Lisp	2019-01-08 12:20:00

#	User	Length	Language	Date
1	Sebastian Sternberg	571	F#	2021-08-25 17:01:50
2	Jacob Harris Cryer Kragh	766	F#	2022-06-27 15:26:59
3	Patrick Bahr	2098	F#	2021-02-21 21:20:51

#	User	Length	Language	Date
1	William Fiset	455	Go	2018-10-27 04:40:35
2	Patrik Lilja	647	Go	2018-11-15 18:15:21
3	Eric Martin	683	Go	2018-12-24 03:32:31
4	Conor McGovern	695	Go	2019-03-09 18:49:29
5	Krzysztof Gibuła	753	Go	2021-05-11 16:36:29
6	Norbert Voelker	831	Go	2021-04-15 19:38:04
7	Anmol Sharma	973	Go	2019-11-08 11:34:46
8	Felix Fatum	1244	Go	2022-09-26 11:48:16

#	User	Length	Language	Date
1	Sebastian Banert	265	Haskell	2024-07-04 20:02:58
2	Øyvind Almli	450	Haskell	2021-09-14 12:51:25
3	Hidden user	454	Haskell	2019-08-13 09:53:25
4	Li Jun	459	Haskell	2023-06-27 16:53:35
5	Fulano de Tal	507	Haskell	2022-01-20 03:02:18
6	Intrets	546	Haskell	2019-04-05 16:54:36
7	Shinji Koshida	555	Haskell	2025-03-28 08:19:57
8	Matthew A Johnson	603	Haskell	2019-05-15 05:28:33
9	Brian Hwang	627	Haskell	2021-09-15 09:18:42
10	Mitchell Wright	629	Haskell	2020-02-19 17:53:22

#	User	Length	Language	Date
1	Duncan Page	472	Java	2019-03-04 22:42:10
2	Brennan Cleland	558	Java	2022-11-07 23:51:52
3	Caeden Whitaker	565	Java	2020-07-04 03:19:28
4	Kevin Kauffman	578	Java	2021-12-28 23:39:30
5	Sukhjot Singh	579	Java	2019-08-03 17:43:26
6	Carter Henderson	595	Java	2021-11-18 16:59:51
7	Christopher Stephens	618	Java	2022-11-12 23:46:43
8	Ali Pervaiz	634	Java	2019-03-19 21:12:47
9	Russell Rivard	647	Java	2021-05-12 20:28:17
10	Drew Isaacson	648	Java	2020-10-19 22:47:37

#	User	Length	Language	Date
1	Thomas Harmeyer	495	JavaScript (Node.js)	2022-11-13 14:15:45
2	Peter Kedemo	703	JavaScript (Node.js)	2020-01-01 11:49:12
3	Chris Wong	800	JavaScript (Node.js)	2021-02-07 12:32:01
4	Howard Tin Chi Chan	890	JavaScript (Node.js)	2021-02-13 13:13:08
5	Hidden user	931	JavaScript (Node.js)	2025-01-25 20:42:09
6	Hovhannes Kantuni	1001	JavaScript (Node.js)	2020-09-02 17:56:05
7	Andoko Chandra	1092	JavaScript (Node.js)	2020-10-04 07:28:43
8	John	1134	JavaScript (Node.js)	2020-07-27 10:13:24
9	Niamh Limerick	1189	JavaScript (Node.js)	2022-01-29 23:28:51
10	Minh Phúc Lê	1508	JavaScript (Node.js)	2020-08-08 15:43:57

#	User	Length	Language	Date
1	Jimmy Gustafsson	154	JavaScript (SpiderMonkey)	2024-07-12 20:03:21
2	Christian Pilegaard Cederquist	190	JavaScript (SpiderMonkey)	2022-11-15 22:51:27
3	Bjørn Chr. Soltvedt	296	JavaScript (SpiderMonkey)	2018-10-19 16:22:58
4	Peter Menyes	358	JavaScript (SpiderMonkey)	2021-03-10 19:52:27
5	Zachary DeStefano	405	JavaScript (SpiderMonkey)	2020-09-04 01:23:45
6	Zach Tschetter	408	JavaScript (SpiderMonkey)	2023-07-04 02:45:16
7	Casey Smith	575	JavaScript (SpiderMonkey)	2019-05-28 14:57:13
8	Nicklas Utgaard	659	JavaScript (SpiderMonkey)	2019-10-31 19:07:01
9	Håkan Lindahl	677	JavaScript (SpiderMonkey)	2022-06-16 20:58:49
10	Rolands	746	JavaScript (SpiderMonkey)	2020-05-31 14:15:56

#	User	Length	Language	Date
1	Timothy Gaede	534	Julia	2024-06-14 02:02:05

#	User	Length	Language	Date
1	Ashish Singh	506	Kotlin	2023-01-28 06:42:18
2	Sarek Høverstad Skotåm	615	Kotlin	2020-10-10 19:16:25
3	Troy Warmboe	627	Kotlin	2020-02-08 00:41:02
4	Hidden user	747	Kotlin	2019-11-14 20:21:45
5	arda atci	768	Kotlin	2020-07-07 20:42:09
6	Hidden user	854	Kotlin	2020-04-11 16:22:34
7	Hidden user	867	Kotlin	2019-12-20 13:16:24
8	Johnny Baloney	876	Kotlin	2021-12-02 11:46:00
9	Neil Harmon	943	Kotlin	2019-04-09 13:59:09
10	Zaw Myat	1001	Kotlin	2024-01-15 02:26:45

#	User	Length	Language	Date
1	Shinji Koshida	451	Lua	2025-04-01 07:47:30

#	User	Length	Language	Date
1	Ingemar Ragnemalm	583	Pascal	2019-01-09 08:48:08
2	David Connolly	1072	Pascal	2023-05-03 17:26:21

#	User	Length	Language	Date
1	Denis BAURAIN	304	Perl	2026-01-29 22:19:34

#	User	Length	Language	Date
1	Renate Fiala-Lundström	603	PHP	2021-07-17 15:34:11
2	Andre Wahyudi	1106	PHP	2022-10-26 01:34:51

#	User	Length	Language	Date
1	Hakan Kjellerstrand	567	Prolog	2023-02-08 08:05:21

#	User	Length	Language	Date
1	Thomas Feld	165	Python 2	2019-08-29 14:15:47
2	Andreas Eisele	189	Python 2	2018-10-19 22:39:29
3	Lars Åström	225	Python 2	2019-11-13 21:03:34
4	Conor McCauley	242	Python 2	2019-11-01 00:58:18
5	Eric Törnqvist	243	Python 2	2018-12-17 21:57:53
6	Hidden user	271	Python 2	2019-07-13 11:27:12
7	Andreas Björklund	282	Python 2	2019-08-18 12:05:55
8	Jesper Öqvist	283	Python 2	2018-10-22 05:52:06
9	Max Holmberg	306	Python 2	2018-11-09 07:34:57
10	Martin Tran	306	Python 2	2019-03-23 17:28:05

#	User	Length	Language	Date
1	Nguyên Khôi Đỗ	109	Python 3	2025-06-01 15:42:44
2	Clement Oh	110	Python 3	2023-07-10 13:53:17
3	Benjamin Z White	132	Python 3	2023-04-01 07:48:08
4	Tai Tze Kin	138	Python 3	2024-05-05 10:00:31
5	Charles Ancheta	142	Python 3	2023-03-24 04:12:43
6	fecesman	148	Python 3	2019-11-11 22:59:11
7	Prateek Bhakta	153	Python 3	2019-03-21 21:59:41
8	Ahmed Chamseddine	162	Python 3	2024-07-16 15:11:01
9	Vedran Čačić	173	Python 3	2019-01-20 18:53:47
10	Shashank Bhatt	182	Python 3	2023-10-16 20:25:14

#	User	Length	Language	Date
1	Thomas Feld	86	Ruby	2022-11-08 14:17:03
2	Russell Ng	101	Ruby	2025-06-06 12:53:14
3	Hidden user	243	Ruby	2019-03-05 11:56:09
4	Miorel Palii	261	Ruby	2018-11-05 04:04:37
5	Donald Dong	334	Ruby	2018-12-30 23:17:55
6	Macdara mac an tSionnaigh	350	Ruby	2019-09-15 14:49:39

#	User	Length	Language	Date
1	Emil Dichmann	323	Rust	2025-10-01 16:46:41
2	Vincent Lagerros	545	Rust	2025-02-07 14:25:42
3	David Rasch	661	Rust	2020-09-11 09:15:56
4	Pankajkumar Patro	726	Rust	2024-12-17 20:57:02
5	David Zacek	763	Rust	2021-05-24 22:48:23
6	Ryan Mueller	785	Rust	2023-10-23 20:23:51
7	Henrik Josefsson	900	Rust	2025-07-18 13:36:44
8	Bas Dirks	902	Rust	2022-01-01 15:06:18
9	Brendan Jones	929	Rust	2020-06-13 08:30:48
10	Farooq Khan	970	Rust	2020-05-28 21:49:33

Solution running time distribution