Problem A
Hailstone Sequences — Problem Statistics

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Submissions	2796
Accepted submissions	1355
Submission ratio	48.46%
Authors	1236
Full solves [?]	1166
Full solve Ratio	94.34%

#	User	Runtime	Language	Date
1	Danny Robinson	0.01 s	Bash	2023-09-09 20:57:25
2	Chenzhang Hu	0.07 s	Bash	2024-05-11 15:47:01

#	User	Runtime	Language	Date
1	Mikael Fiala-Lundström	0.02 s	C#	2021-10-19 21:35:12
2	Hidden user	0.02 s	C#	2021-11-04 21:48:52
3	Karoline Øijorden	0.02 s	C#	2022-02-10 17:19:26
4	Hailey Hable	0.02 s	C#	2022-03-16 17:59:30
5	Göran Andersson	0.02 s	C#	2022-05-15 12:40:40
6	Esty Crow	0.02 s	C#	2022-09-24 07:02:14
7	Krzysztof Magda	0.04 s	C#	2023-04-28 13:05:12
8	Christopher Reichling	0.04 s	C#	2024-09-03 16:01:33
9	Գոռ Բաղդասարյան	0.04 s	C#	2024-09-27 09:51:06
10	Umar Rasyid	0.04 s	C#	2025-01-09 01:38:56

#	User	Runtime	Language	Date
1	Oisín Mac Fhearaí	0.00 s	Crystal	2024-08-29 12:04:44

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.03 s	F#	2022-07-23 07:33:22

#	User	Runtime	Language	Date
1	Erwin Darsono	0.00 s	Go	2025-06-11 06:36:32
2	Norbert Voelker	0.08 s	Go	2021-10-18 00:19:28

#	User	Runtime	Language	Date
1	Ng Tek In	0.00 s	Haskell	2022-08-10 20:12:30
2	Leslie Yip	0.00 s	Haskell	2022-08-12 03:56:20
3	Steinar Simonnes	0.00 s	Haskell	2024-02-20 12:29:20
4	Sebastian Banert	0.00 s	Haskell	2024-06-20 17:34:23
5	Brent Yorgey	0.01 s	Haskell	2021-10-13 17:19:36
6	Zackeus Zetterberg	0.01 s	Haskell	2021-10-21 21:29:06
7	Hidden user	0.01 s	Haskell	2021-10-27 15:44:59
8	Øyvind Almli	0.01 s	Haskell	2021-10-30 13:51:41
9	Charley Sheaffer	0.01 s	Haskell	2021-11-01 00:26:11
10	Jan Hrček	0.01 s	Haskell	2021-11-20 13:44:29

#	User	Runtime	Language	Date
1	Joshua Chin	0.04 s	Java	2025-06-10 13:01:17
2	Lee Heng Sheng	0.05 s	Java	2024-05-01 09:37:11
3	Terry Morris	0.05 s	Java	2024-07-08 02:17:00
4	Victor Nguyen	0.06 s	Java	2021-10-27 18:01:31
5	Joachim Borup	0.06 s	Java	2021-11-02 16:54:07
6	Dylan Smith	0.06 s	Java	2021-11-23 01:08:34
7	Stela Palii	0.06 s	Java	2021-12-10 07:24:36
8	Sven Rönnbäck	0.06 s	Java	2021-12-22 17:59:54
9	Kyle Kelly	0.06 s	Java	2021-12-25 11:57:56
10	Ryan Tan	0.06 s	Java	2021-12-26 11:41:53

#	User	Runtime	Language	Date
1	Hidden user	0.04 s	JavaScript (Node.js)	2024-11-09 21:08:13
2	John	0.09 s	JavaScript (Node.js)	2022-08-07 01:40:35
3	Kyle Senebouttarath	0.09 s	JavaScript (Node.js)	2023-03-08 21:59:39
4	Howard Tin Chi Chan	0.42 s	JavaScript (Node.js)	2022-01-11 13:51:13
5	Chris Wong	0.42 s	JavaScript (Node.js)	2022-01-13 10:10:27

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.02 s	JavaScript (SpiderMonkey)	2021-10-14 13:55:50
2	Peter Menyes	0.02 s	JavaScript (SpiderMonkey)	2021-11-04 21:16:34
3	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-01-15 16:33:17
4	Zach Tschetter	0.02 s	JavaScript (SpiderMonkey)	2023-04-22 01:58:29
5	Evan Magill	0.02 s	JavaScript (SpiderMonkey)	2024-04-25 07:28:02
6	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-06-17 22:15:11

#	User	Runtime	Language	Date
1	Timothy Gaede	0.35 s	Julia	2024-03-23 06:14:41

#	User	Runtime	Language	Date
1	Nicholas Johnson	0.11 s	Kotlin	2021-11-16 04:28:06
2	Jacob Huebner	0.11 s	Kotlin	2022-03-16 19:48:34
3	Sam Keyser	0.11 s	Kotlin	2022-03-18 00:24:09
4	Ola Sundell	0.14 s	Kotlin	2021-10-20 16:28:28
5	Malcolm Johnson	0.15 s	Kotlin	2022-09-08 22:04:56
6	Sergey Jakobsen	0.18 s	Kotlin	2021-10-17 14:18:20
7	Troy Warmboe	0.18 s	Kotlin	2023-04-11 21:00:32
8	Adam Rankin	0.18 s	Kotlin	2023-04-25 19:40:22
9	Emil Wihlander	0.18 s	Kotlin	2023-07-26 22:02:20
10	Martijn Muijsers	0.18 s	Kotlin	2024-05-31 11:28:07

#	User	Runtime	Language	Date
1	David Connolly	0.00 s	Pascal	2021-10-13 21:59:16
2	Ingemar Ragnemalm	0.00 s	Pascal	2022-09-09 19:19:58

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Perl	2024-10-10 14:06:32

#	User	Runtime	Language	Date
1	Andre Wahyudi	0.01 s	PHP	2023-03-16 09:56:10
2	Renate Fiala-Lundström	0.01 s	PHP	2023-07-20 19:39:47

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.02 s	Prolog	2022-08-08 11:35:01
2	Hakan Kjellerstrand	0.03 s	Prolog	2023-02-11 19:26:15

#	User	Runtime	Language	Date
1	Johan Lyts	0.03 s	Python 2	2021-10-24 20:47:16
2	Yanmarshus Bachtiar	0.03 s	Python 2	2021-10-30 14:22:54
3	Hasan Kalzi	0.03 s	Python 2	2021-11-05 21:30:37
4	Andreas Björklund	0.03 s	Python 2	2021-11-10 17:02:13

#	User	Runtime	Language	Date
1	Adam Pehrson	0.04 s	Python 3	2022-06-06 15:01:01
2	Petr	0.04 s	Python 3	2022-06-06 18:28:16
3	Trishul	0.04 s	Python 3	2022-07-19 14:20:06
4	Lee Chun Wan	0.04 s	Python 3	2022-08-22 15:35:20
5	Thomas Feld	0.04 s	Python 3	2022-08-25 10:13:12
6	Fetene Abebe	0.04 s	Python 3	2022-08-26 19:46:20
7	Sebastian Pucher	0.04 s	Python 3	2022-08-29 16:00:40
8	Preston Clarke	0.04 s	Python 3	2022-09-03 23:17:46
9	Ahmed Djemil MOUSSA	0.04 s	Python 3	2022-09-05 15:40:45
10	Guru Prasath	0.04 s	Python 3	2022-09-07 06:40:35

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	Ruby	2021-10-13 17:21:05
2	Miorel Palii	0.05 s	Ruby	2022-03-12 18:34:23
3	Thomas Feld	0.06 s	Ruby	2023-01-02 15:59:22
4	Hakan Kjellerstrand	0.06 s	Ruby	2023-03-18 13:39:20
5	Eugen Neagoe	0.06 s	Ruby	2023-04-10 01:39:55
6	Chenzhang Hu	0.12 s	Ruby	2025-09-22 14:46:48

#	User	Length	Language	Date
1	Danny Robinson	49	Bash	2023-09-09 20:57:25
2	Chenzhang Hu	51	Bash	2025-09-13 18:02:31

#	User	Length	Language	Date
1	Martin Blom	83	C	2024-01-08 12:00:04
2	Matthew Weston	200	C	2022-06-11 17:16:23
3	Matthew Hartono	231	C	2022-09-19 19:03:05
4	Mikael K Eriksson	240	C	2021-10-19 15:32:22
5	Allan Nouri	256	C	2024-04-03 16:44:21
6	Andrew Roberts	257	C	2021-11-20 23:42:56
7	Julian Duniec	260	C	2023-08-27 16:42:23
8	Hidden user	283	C	2025-05-17 07:17:24
9	Aleksandr Khindanov	284	C	2023-11-30 22:07:18
10	紅茶	286	C	2023-08-29 11:08:54

#	User	Length	Language	Date
1	Christopher Reichling	267	C#	2024-09-03 16:01:33
2	Esty Crow	311	C#	2022-09-24 07:02:14
3	Göran Andersson	365	C#	2022-05-15 12:40:40
4	Գոռ Բաղդասարյան	479	C#	2024-09-27 09:51:06
5	Hidden user	484	C#	2021-11-04 21:48:52
6	Mikael Fiala-Lundström	534	C#	2021-10-19 21:35:12
7	Benjamin Bilbeau	574	C#	2024-08-20 22:43:52
8	Krishnasai Chaluvadi	639	C#	2023-09-08 23:33:27
9	Hailey Hable	656	C#	2022-03-16 17:59:30
10	Umar Rasyid	716	C#	2025-01-09 01:38:56

#	User	Length	Language	Date
1	Frans Meulenbroeks	97	C++	2025-02-11 22:06:00
2	Tyler Fernando	101	C++	2022-11-03 11:58:39
3	Ernest Ng Zi Xuan	113	C++	2023-01-23 22:01:38
4	Benjamin Henriksson	168	C++	2022-09-04 16:43:07
5	Michele Ghilardi	180	C++	2023-03-21 17:05:35
6	Đậu Huy Minh	186	C++	2022-11-03 17:47:49
7	Dominik Kubicki	196	C++	2022-01-24 19:09:34
8	Gabriel Andersson	196	C++	2022-09-03 12:08:11
9	Yeung Man Tsung	198	C++	2022-11-19 08:55:48
10	Jesús Pacheco Alonso	202	C++	2024-07-10 19:17:28

#	User	Length	Language	Date
1	Oisín Mac Fhearaí	90	Crystal	2024-08-29 12:04:44

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	333	F#	2022-07-23 07:33:22

#	User	Length	Language	Date
1	Erwin Darsono	192	Go	2025-06-11 06:36:32
2	Norbert Voelker	474	Go	2021-10-18 00:19:28

#	User	Length	Language	Date
1	Brent Yorgey	135	Haskell	2021-10-13 17:19:36
2	Sebastian Banert	194	Haskell	2024-06-20 17:34:23
3	Øyvind Almli	220	Haskell	2021-10-30 13:51:41
4	Leslie Yip	246	Haskell	2022-08-12 03:56:20
5	Steinar Simonnes	259	Haskell	2024-02-20 12:29:20
6	Zackeus Zetterberg	271	Haskell	2021-10-21 21:29:06
7	Jan Hrček	351	Haskell	2021-11-20 13:44:29
8	Charley Sheaffer	406	Haskell	2021-11-01 00:26:11
9	Ng Tek In	510	Haskell	2022-08-10 20:12:30
10	Hidden user	13026	Haskell	2021-10-27 15:44:59

#	User	Length	Language	Date
1	Ernest Ng Zi Xuan	251	Java	2023-06-29 19:19:49
2	Jason Liu	291	Java	2023-05-10 02:48:02
3	Collin Presser	327	Java	2022-11-17 17:39:20
4	Kevin Kauffman	349	Java	2021-12-29 05:11:15
5	Joshua Chin	353	Java	2025-06-10 13:05:12
6	Hidden user	365	Java	2023-02-18 23:48:22
7	Binh Tran	366	Java	2022-11-17 18:27:04
8	Thomas Anung Basuki	372	Java	2025-12-09 02:20:12
9	Anna	380	Java	2024-02-01 15:37:39
10	Mark van Helvoort	382	Java	2024-08-12 14:40:57

#	User	Length	Language	Date
1	Howard Tin Chi Chan	437	JavaScript (Node.js)	2022-01-11 13:51:13
2	Kyle Senebouttarath	576	JavaScript (Node.js)	2023-03-08 21:59:39
3	Hidden user	598	JavaScript (Node.js)	2024-11-09 21:08:13
4	John	733	JavaScript (Node.js)	2022-08-07 01:40:35
5	Chris Wong	788	JavaScript (Node.js)	2022-01-13 10:10:27

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	56	JavaScript (SpiderMonkey)	2023-01-15 16:34:25
2	Jimmy Gustafsson	70	JavaScript (SpiderMonkey)	2024-06-17 22:15:11
3	Evan Magill	94	JavaScript (SpiderMonkey)	2024-04-25 07:28:02
4	Bjørn Chr. Soltvedt	111	JavaScript (SpiderMonkey)	2021-10-14 13:56:27
5	Peter Menyes	127	JavaScript (SpiderMonkey)	2021-11-04 21:16:34
6	Zach Tschetter	129	JavaScript (SpiderMonkey)	2023-04-22 01:58:29

#	User	Length	Language	Date
1	Timothy Gaede	180	Julia	2024-03-23 06:05:49

#	User	Length	Language	Date
1	Sam Keyser	233	Kotlin	2023-03-08 17:12:53
2	Troy Warmboe	246	Kotlin	2023-04-11 21:00:32
3	Chris Johnson	265	Kotlin	2025-03-12 20:47:19
4	Malcolm Johnson	280	Kotlin	2022-09-08 22:04:56
5	Jacob Huebner	320	Kotlin	2022-03-16 19:48:34
6	Sergey Jakobsen	325	Kotlin	2021-10-17 14:18:20
7	Emil Wihlander	358	Kotlin	2023-07-26 22:02:20
8	Adam Rankin	444	Kotlin	2023-04-25 19:40:22
9	Ola Sundell	544	Kotlin	2021-10-20 16:28:28
10	Hidden user	557	Kotlin	2024-09-01 14:02:21

#	User	Length	Language	Date
1	Ingemar Ragnemalm	203	Pascal	2022-09-09 19:19:58
2	David Connolly	297	Pascal	2021-10-13 21:59:16

#	User	Length	Language	Date
1	Hidden user	197	Perl	2024-10-10 14:06:32

#	User	Length	Language	Date
1	Renate Fiala-Lundström	149	PHP	2023-07-20 19:39:47
2	Andre Wahyudi	543	PHP	2023-03-16 09:56:10

#	User	Length	Language	Date
1	Hakan Kjellerstrand	129	Prolog	2023-03-18 00:07:31
2	Andriy Zyevakov	403	Prolog	2022-08-08 11:35:01

#	User	Length	Language	Date
1	Andreas Björklund	103	Python 2	2021-11-10 17:02:13
2	Yanmarshus Bachtiar	137	Python 2	2021-10-30 14:22:54
3	Johan Lyts	173	Python 2	2021-10-24 20:47:16
4	Hasan Kalzi	358	Python 2	2021-11-05 21:30:37

#	User	Length	Language	Date
1	Thomas Feld	61	Python 3	2022-08-25 10:13:12
2	Clement Oh	61	Python 3	2023-05-20 21:42:29
3	Harry Zhang	62	Python 3	2023-01-19 22:53:51
4	Alexandre Charland	62	Python 3	2024-10-13 16:24:36
5	Morten Clausen	65	Python 3	2022-10-09 22:21:26
6	David Worley	65	Python 3	2025-11-17 19:33:58
7	Charles Ancheta	67	Python 3	2023-04-09 08:11:56
8	Tai Tze Kin	67	Python 3	2024-05-02 09:42:01
9	Farzam Abrishami	68	Python 3	2024-01-25 23:23:37
10	Tobias Bessler	70	Python 3	2024-04-24 02:57:33

#	User	Length	Language	Date
1	Thomas Feld	48	Ruby	2023-01-02 15:59:22
2	Hakan Kjellerstrand	50	Ruby	2023-03-18 13:42:14
3	Miorel Palii	115	Ruby	2022-03-12 18:34:23
4	Hidden user	123	Ruby	2021-10-13 17:21:05
5	Eugen Neagoe	124	Ruby	2023-04-10 01:39:55
6	Chenzhang Hu	150	Ruby	2025-09-22 14:46:48

#	User	Length	Language	Date
1	Emil Dichmann	293	Rust	2025-09-24 05:14:26
2	Artur Khuziakhmetov	320	Rust	2025-02-02 12:13:15
3	David Rasch	379	Rust	2021-10-17 10:04:34
4	Bas Dirks	394	Rust	2022-01-04 18:00:17
5	Vincent Lagerros	395	Rust	2025-01-27 10:09:42
6	Hidden user	434	Rust	2021-10-22 17:05:43
7	Pankajkumar Patro	443	Rust	2024-09-21 16:52:27
8	Brayton Alkinburgh	517	Rust	2022-11-17 17:57:56
9	Zac Clifton	557	Rust	2021-10-15 22:07:23
10	Jan-Erik Menzel	644	Rust	2022-07-02 21:13:11

Solution running time distribution