Problem A
Simple Cron Spec — Problem Statistics

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Submissions	977
Accepted submissions	554
Submission ratio	56.70%
Authors	479
Full solves [?]	439
Full solve Ratio	91.65%

#	User	Runtime	Language	Date
1	Andrew Jones	0.01 s	C	2022-01-10 02:16:51
2	Sambit Palit	0.02 s	C	2021-06-27 16:00:05

#	User	Runtime	Language	Date
1	Göran Andersson	0.10 s	C#	2022-05-18 00:31:36
2	Mikael Fiala-Lundström	0.18 s	C#	2021-04-27 19:54:48
3	Henrik Hallbert	0.34 s	C#	2022-04-14 12:21:45
4	Leslie Yip	0.96 s	C#	2022-09-08 15:14:58

#	User	Runtime	Language	Date
1	Bay Wei Heng	0.00 s	C++	2021-09-04 09:33:01
2	Jonathan Hallström	0.00 s	C++	2023-08-07 21:15:47
3	Mazen Hassan	0.00 s	C++	2025-12-29 09:33:33
4	Frankie Lam	0.01 s	C++	2021-04-22 23:52:33
5	Jay Leeds	0.01 s	C++	2021-04-22 23:54:47
6	Eric Wei	0.01 s	C++	2021-04-22 23:57:08
7	Kinllen Peng	0.01 s	C++	2021-04-22 23:57:29
8	Moses Mayer	0.01 s	C++	2021-04-22 23:59:44
9	Daniel Qian	0.01 s	C++	2021-04-23 00:06:22
10	Akif Patel	0.01 s	C++	2021-04-23 00:06:38

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.31 s	F#	2022-11-19 19:42:26

#	User	Runtime	Language	Date
1	Norbert Voelker	0.09 s	Go	2021-04-27 18:38:33
2	Ian Howell	0.50 s	Go	2021-05-12 18:33:32

#	User	Runtime	Language	Date
1	Steinar Simonnes	1.29 s	Haskell	2025-06-02 12:03:06
2	Jan Hrček	1.75 s	Haskell	2021-10-03 14:00:30
3	Hidden user	2.19 s	Haskell	2021-05-29 17:02:07
4	Hidden user	2.63 s	Haskell	2023-01-14 17:46:48
5	Brent Yorgey	2.87 s	Haskell	2021-04-26 22:21:34

#	User	Runtime	Language	Date
1	Crystal Sharpe	0.10 s	Java	2021-05-01 19:28:26
2	Sven Rönnbäck	0.10 s	Java	2022-01-22 13:31:34
3	Joachim Borup	0.13 s	Java	2021-05-07 16:34:15
4	Chris Gittings	0.15 s	Java	2021-04-26 19:53:10
5	Andy Phan	0.16 s	Java	2021-04-22 23:55:52
6	Quân Anh	0.16 s	Java	2024-04-26 03:17:58
7	Jonathan Guo	0.17 s	Java	2021-04-23 00:05:24
8	Ranjith M	0.19 s	Java	2023-08-26 16:33:59
9	Leon Yuan	0.20 s	Java	2021-04-23 00:10:52
10	Jonathan Lam	0.20 s	Java	2021-04-23 00:48:54

#	User	Runtime	Language	Date
1	Chris Wong	1.89 s	JavaScript (Node.js)	2022-01-16 16:12:12

#	User	Runtime	Language	Date
1	Jimmy Gustafsson	0.19 s	JavaScript (SpiderMonkey)	2024-08-07 07:17:35
2	Christian Pilegaard Cederquist	0.26 s	JavaScript (SpiderMonkey)	2023-02-08 22:57:08
3	Peter Menyes	0.60 s	JavaScript (SpiderMonkey)	2021-09-26 09:46:10
4	Bjørn Chr. Soltvedt	1.75 s	JavaScript (SpiderMonkey)	2021-04-26 22:43:35
5	Zach Tschetter	2.37 s	JavaScript (SpiderMonkey)	2023-06-28 03:28:59

#	User	Runtime	Language	Date
1	Timothy Gaede	1.93 s	Julia	2024-06-15 05:05:25

#	User	Runtime	Language	Date
1	Benjamin Laurence Erickson	0.21 s	Kotlin	2021-06-30 15:36:40
2	Adam Rankin	0.29 s	Kotlin	2023-09-22 02:17:41
3	Jacob Huebner	0.38 s	Kotlin	2021-04-27 11:43:19
4	Nicholas Johnson	0.41 s	Kotlin	2021-04-22 23:48:42
5	Roger Bongers	0.59 s	Kotlin	2021-06-26 23:37:44
6	Ola Sundell	0.62 s	Kotlin	2021-05-23 17:09:39
7	Martijn Muijsers	1.05 s	Kotlin	2024-06-02 17:46:48
8	Rahul Kandekar	1.94 s	Kotlin	2022-09-20 10:07:56

#	User	Runtime	Language	Date
1	Greg Gorlen	1.98 s	Perl	2024-02-24 06:37:02

#	User	Runtime	Language	Date
1	crapcode	0.25 s	PHP	2022-06-01 23:31:13

#	User	Runtime	Language	Date
1	Andreas Björklund	0.07 s	Python 2	2021-05-01 05:26:21
2	Thomas Feld	0.09 s	Python 2	2021-05-21 06:44:56

#	User	Runtime	Language	Date
1	Noor Nasri	0.07 s	Python 3	2021-04-23 00:39:56
2	Florian Dubois	0.08 s	Python 3	2021-06-24 16:42:06
3	Jacob Teo	0.08 s	Python 3	2023-04-09 20:07:21
4	Kither	0.08 s	Python 3	2023-07-10 12:58:34
5	Lucas Patten	0.08 s	Python 3	2024-01-19 02:47:53
6	Linh B. Ngo	0.08 s	Python 3	2024-04-19 00:51:16
7	Ryan Tan	0.08 s	Python 3	2025-07-24 13:59:18
8	Tanner Hoke	0.09 s	Python 3	2021-04-22 23:56:15
9	Shuxin Chen	0.09 s	Python 3	2021-04-22 23:56:53
10	Konstantin Miagkov	0.09 s	Python 3	2021-04-23 00:08:29

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.00 s	Rust	2025-05-28 13:01:35
2	Jason Hooper	0.01 s	Rust	2022-03-28 18:02:05
3	Isak Jägberg	0.27 s	Rust	2021-12-24 21:48:41
4	Bas Dirks	0.27 s	Rust	2022-01-06 14:26:50
5	Eric Pinter	0.68 s	Rust	2021-06-21 19:59:23
6	Ethan Toney	1.56 s	Rust	2022-05-04 21:08:59
7	Freek van Keulen	2.04 s	Rust	2021-07-28 15:29:27

#	User	Length	Language	Date
1	Sambit Palit	2288	C	2021-06-27 16:00:05
2	Andrew Jones	2847	C	2022-01-10 02:16:51

#	User	Length	Language	Date
1	Leslie Yip	1450	C#	2022-09-08 15:14:58
2	Göran Andersson	1885	C#	2022-05-18 00:31:36
3	Mikael Fiala-Lundström	3175	C#	2021-04-27 19:54:48
4	Henrik Hallbert	3355	C#	2022-04-14 12:16:14

#	User	Length	Language	Date
1	Qimin Tao	906	C++	2021-04-23 01:14:30
2	Mangesh Sakordekar	944	C++	2022-09-10 19:10:31
3	Dmitry Lyubshin	988	C++	2023-04-02 09:46:05
4	Frederick Pek	1036	C++	2021-06-11 10:22:33
5	Hidden user	1143	C++	2021-05-04 16:50:38
6	Caeden Whitaker	1163	C++	2021-06-02 18:17:51
7	Grae Yeandle	1180	C++	2021-04-26 17:45:02
8	Joakim Blikstad	1191	C++	2021-06-17 09:27:16
9	Richard Gong	1212	C++	2021-04-23 00:18:10
10	Yen-Hsiang Chang	1226	C++	2021-05-02 03:58:23

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	2144	F#	2022-11-19 19:42:26

#	User	Length	Language	Date
1	Ian Howell	1328	Go	2021-05-12 18:33:32
2	Norbert Voelker	2024	Go	2021-04-27 18:38:33

#	User	Length	Language	Date
1	Hidden user	975	Haskell	2023-01-14 17:46:48
2	Steinar Simonnes	1235	Haskell	2025-06-02 11:56:09
3	Jan Hrček	1426	Haskell	2021-10-03 14:00:30
4	Brent Yorgey	2625	Haskell	2021-04-26 22:21:34
5	Hidden user	13253	Haskell	2021-05-29 17:02:07

#	User	Length	Language	Date
1	Jonas Klausen	1081	Java	2022-09-30 11:56:42
2	Colin Sullivan	1554	Java	2021-04-23 00:42:24
3	Jonathan Guo	1625	Java	2021-04-23 00:05:24
4	Darrin Wiley	1788	Java	2023-09-24 06:49:29
5	Andrew Chen	1822	Java	2021-04-23 00:34:34
6	Daniel West	1902	Java	2021-04-23 00:09:19
7	Darko Aleksic	1913	Java	2021-05-22 05:30:19
8	Arup Ratan Guha	1939	Java	2021-08-12 20:10:15
9	Victor Nguyen	1947	Java	2021-09-05 02:34:23
10	Ed Carl	2033	Java	2021-04-23 01:38:48

#	User	Length	Language	Date
1	Chris Wong	1575	JavaScript (Node.js)	2022-01-16 16:12:12

#	User	Length	Language	Date
1	Jimmy Gustafsson	422	JavaScript (SpiderMonkey)	2024-08-07 07:17:35
2	Peter Menyes	1005	JavaScript (SpiderMonkey)	2021-09-26 11:36:16
3	Bjørn Chr. Soltvedt	1124	JavaScript (SpiderMonkey)	2021-04-26 22:43:35
4	Zach Tschetter	1674	JavaScript (SpiderMonkey)	2023-06-28 03:28:59
5	Christian Pilegaard Cederquist	1987	JavaScript (SpiderMonkey)	2023-02-08 22:57:08

#	User	Length	Language	Date
1	Timothy Gaede	1770	Julia	2024-06-15 05:05:25

#	User	Length	Language	Date
1	Nicholas Johnson	1038	Kotlin	2021-04-22 23:48:42
2	Adam Rankin	1213	Kotlin	2023-09-22 02:17:41
3	Martijn Muijsers	1382	Kotlin	2024-06-02 17:46:48
4	Rahul Kandekar	1488	Kotlin	2022-09-20 10:07:56
5	Roger Bongers	1620	Kotlin	2021-06-26 23:37:44
6	Benjamin Laurence Erickson	1672	Kotlin	2021-06-30 15:36:40
7	Ola Sundell	1715	Kotlin	2021-05-23 17:09:39
8	Jacob Huebner	2290	Kotlin	2021-04-27 11:43:19

#	User	Length	Language	Date
1	Greg Gorlen	964	Perl	2024-02-24 06:36:40

#	User	Length	Language	Date
1	crapcode	865	PHP	2022-06-01 23:31:13

#	User	Length	Language	Date
1	Thomas Feld	407	Python 2	2021-05-21 06:42:50
2	Andreas Björklund	630	Python 2	2021-05-01 05:26:21

#	User	Length	Language	Date
1	Peter Seely	373	Python 3	2024-02-16 08:30:49
2	Oskar Haarklou Veileborg	405	Python 3	2021-05-26 09:27:40
3	Thibault Raffaillac	415	Python 3	2024-07-31 14:24:42
4	Ahmed Chamseddine	501	Python 3	2024-08-08 15:02:09
5	Hidden user	522	Python 3	2021-08-13 20:51:23
6	Teikn Smith	527	Python 3	2024-01-19 02:29:29
7	Tobias Bessler	551	Python 3	2024-08-28 17:50:41
8	Markus Mathiasen	559	Python 3	2021-05-07 14:41:45
9	Jacob Teo	572	Python 3	2023-04-09 20:07:21
10	Xander Fair	578	Python 3	2025-10-23 19:45:36

#	User	Length	Language	Date
1	Bas Dirks	1608	Rust	2022-01-06 14:26:50
2	Ethan Toney	1633	Rust	2022-05-04 21:08:59
3	Freek van Keulen	2154	Rust	2021-07-28 15:29:27
4	Eric Pinter	2240	Rust	2021-06-21 19:59:23
5	Isak Jägberg	2996	Rust	2021-12-24 21:48:41
6	Jason Hooper	3362	Rust	2022-03-28 18:05:29
7	Vincent Lagerros	52990	Rust	2025-05-28 13:01:35

Solution running time distribution