Problem A
Collatz Conjecture — Problem Statistics

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Submissions	8318
Accepted submissions	1901
Submission ratio	22.85%
Authors	1673
Full solves [?]	1370
Full solve Ratio	81.89%

#	User	Runtime	Language	Date
1	lobo	0.04 s	C#	2016-05-28 16:39:30
2	Tomasz Masternak	0.04 s	C#	2018-09-24 13:13:29
3	Abdellatif Elyoussefy	0.04 s	C#	2020-02-12 10:27:36
4	Moo	0.05 s	C#	2017-07-15 11:56:06
5	Frankie Chen	0.05 s	C#	2019-08-26 18:15:40
6	Frankie Chen	0.05 s	C#	2019-08-26 19:28:16
7	Þorsteinn Þorvaldsson	0.06 s	C#	2017-06-07 18:57:35
8	Deci Bel	0.06 s	C#	2024-05-03 13:06:36
9	Nathan Andrews	0.07 s	C#	2024-09-13 00:56:09

#	User	Runtime	Language	Date
1	Ronas Jacob Coban Olsen	0.03 s	Go	2025-08-06 10:41:06
2	Ilya Antipin	0.17 s	Go	2017-01-20 15:01:04

#	User	Runtime	Language	Date
1	Brent Yorgey	0.02 s	Haskell	2017-10-03 13:07:08
2	Alberto Cerezo Cid	0.02 s	Haskell	2018-10-26 18:45:56
3	César Antonio Carvajal de la Haza	0.02 s	Haskell	2018-10-28 16:50:09
4	Patrik Lilja	0.03 s	Haskell	2016-05-02 22:37:18
5	Hidden user	0.04 s	Haskell	2022-02-13 06:04:38
6	Josenildo Silva	0.08 s	Haskell	2017-02-18 13:32:26
7	Abel Martin	0.16 s	Haskell	2018-10-29 19:50:10
8	Yamato Matsuoka	0.18 s	Haskell	2016-06-04 05:20:37
9	Max Jackson	0.25 s	Haskell	2016-05-02 08:01:24
10	Brian Hwang	0.27 s	Haskell	2021-09-17 03:01:13

#	User	Runtime	Language	Date
1	Liam Keliher	0.09 s	Java	2016-10-25 22:26:40
2	Eyleifur Bjarkason	0.09 s	Java	2018-12-04 21:11:43
3	Alexander Belokon	0.11 s	Java	2025-10-23 23:07:52
4	Hidden user	0.14 s	Java	2017-01-23 19:46:20
5	Hidden user	0.14 s	Java	2018-08-04 20:53:24
6	Atul Sharma	0.15 s	Java	2017-10-27 10:38:50
7	Taras Romanyuk	0.15 s	Java	2024-08-09 00:54:08
8	lobo	0.17 s	Java	2016-05-28 16:14:48
9	Ross Sowell	0.17 s	Java	2016-06-02 22:53:23
10	Subham Swastik Dora	0.17 s	Java	2017-06-12 14:29:10

#	User	Runtime	Language	Date
1	Minh Trang Nguyen	0.09 s	JavaScript (Node.js)	2025-10-20 13:27:29

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.10 s	JavaScript (SpiderMonkey)	2016-05-01 02:50:59
2	Nicklas Utgaard	0.11 s	JavaScript (SpiderMonkey)	2017-11-22 23:25:11
3	Christian Pilegaard Cederquist	0.30 s	JavaScript (SpiderMonkey)	2023-06-28 16:26:55

#	User	Runtime	Language	Date
1	Hidden user	0.45 s	Julia	2025-04-21 10:33:49
2	Timothy Gaede	0.68 s	Julia	2024-05-01 19:07:11
3	Danny Robinson	0.98 s	Julia	2023-10-06 09:52:14

#	User	Runtime	Language	Date
1	Hidden user	0.22 s	Kotlin	2020-05-09 10:54:55
2	Hidden user	0.33 s	Kotlin	2021-05-04 11:53:49
3	Eloy Hernández	0.33 s	Kotlin	2021-10-08 18:33:08
4	Adam Koprowski	0.34 s	Kotlin	2021-07-15 11:42:25
5	Steinar Simonnes	0.54 s	Kotlin	2025-09-04 08:51:43
6	Mark Mathis	0.59 s	Kotlin	2018-10-14 22:27:42

#	User	Runtime	Language	Date
1	Anthony Gillespie	0.56 s	Lua	2024-09-18 15:53:23

#	User	Runtime	Language	Date
1	Joseph Chau	0.04 s	Pascal	2024-02-03 00:19:50

#	User	Runtime	Language	Date
1	Sigurður Jens Albertsson	0.05 s	Python 2	2017-11-18 21:26:25
2	Peter Sofronas	0.06 s	Python 2	2016-08-23 04:50:42
3	Jake Mayo	0.06 s	Python 2	2016-11-21 01:11:21
4	Asad Mahdi	0.06 s	Python 2	2016-12-02 23:29:45
5	Ekaterina	0.06 s	Python 2	2017-01-22 23:33:23
6	Paul Leung	0.06 s	Python 2	2017-10-27 15:54:52
7	Juliang Li	0.06 s	Python 2	2018-03-02 23:11:55
8	Jesper Öqvist	0.06 s	Python 2	2018-08-12 01:12:01
9	Thomas Feld	0.06 s	Python 2	2020-06-23 14:31:59
10	Frederik Højholt	0.07 s	Python 2	2016-07-05 21:51:56

#	User	Runtime	Language	Date
1	Svyatoslav Ilinskiy	0.06 s	Python 3	2016-11-19 23:00:26
2	Johny Vinaver	0.06 s	Python 3	2016-11-21 04:36:58
3	Brian Bechtel	0.06 s	Python 3	2016-11-21 04:48:17
4	Michael Volk	0.06 s	Python 3	2016-12-02 22:47:55
5	Dennis Le	0.06 s	Python 3	2016-12-03 02:53:43
6	Guk Yi Siong	0.06 s	Python 3	2025-02-06 13:59:23
7	Pranav Tonpe	0.06 s	Python 3	2025-08-28 23:43:49
8	Christine Dominic	0.06 s	Python 3	2025-09-01 07:03:08
9	Eric Zazovsky	0.06 s	Python 3	2025-09-02 20:26:13
10	Suryamukhi Venigalla	0.06 s	Python 3	2025-09-03 12:06:45

#	User	Runtime	Language	Date
1	Florent Thomas-Morel	0.08 s	Ruby	2016-11-24 15:04:29
2	Thomas Feld	0.10 s	Ruby	2023-10-16 15:08:07
3	Kieran Maharaj	0.14 s	Ruby	2020-07-02 14:07:34
4	Hidden user	0.36 s	Ruby	2021-03-12 07:17:20

#	User	Runtime	Language	Date
1	David Rasch	0.01 s	Rust	2020-07-30 17:01:22
2	Alex Loiko	0.01 s	Rust	2021-07-08 17:38:23
3	Chen Weikang	0.02 s	Rust	2019-01-06 23:08:33
4	Chaoyi Yin	0.02 s	Rust	2019-01-06 23:13:38
5	Bas Dirks	0.02 s	Rust	2022-02-04 21:26:36
6	Jiaye Will Wang	0.02 s	Rust	2025-09-09 05:32:28
7	Isak Jägberg	0.03 s	Rust	2021-01-07 10:39:55
8	Marcus Dicander	0.03 s	Rust	2021-07-08 17:55:25
9	Egor Kulikov	0.66 s	Rust	2025-03-21 09:32:14

#	User	Length	Language	Date
1	Hidden user	558	C	2017-07-17 18:33:20
2	Raymond Yang	596	C	2020-01-03 23:44:58
3	Mirel Cosulschi	766	C	2023-11-23 09:05:17
4	Ivan Petrov	835	C	2019-09-02 14:13:17
5	Yassir Mahmoud El Massaoudi	882	C	2016-10-12 17:21:47
6	Đào Thanh Duy	985	C	2016-04-03 08:07:30
7	Pavel Shibaev	985	C	2016-05-09 13:10:32
8	Ravi Sharma	987	C	2016-07-10 16:33:44
9	Thibault Raffaillac	1059	C	2018-11-29 12:37:46
10	Yen Hung Liu	1336	C	2016-10-14 17:44:13

#	User	Length	Language	Date
1	Nathan Andrews	880	C#	2024-09-13 00:56:09
2	Tomasz Masternak	1280	C#	2018-09-24 13:13:29
3	Þorsteinn Þorvaldsson	1431	C#	2017-06-07 18:57:35
4	Abdellatif Elyoussefy	1682	C#	2020-02-12 10:27:36
5	lobo	2397	C#	2016-05-28 16:39:30
6	Frankie Chen	2456	C#	2019-08-26 19:28:16
7	Frankie Chen	2488	C#	2019-08-26 18:15:40
8	Deci Bel	2493	C#	2024-05-03 13:06:36
9	Moo	3530	C#	2017-07-15 11:56:06

#	User	Length	Language	Date
1	Hidden user	466	C++	2024-10-22 15:07:10
2	永田まさき	537	C++	2019-03-01 11:16:03
3	Modan Han	551	C++	2017-05-13 21:07:39
4	손상준	556	C++	2015-11-17 07:48:01
5	Grae Yeandle	556	C++	2021-01-30 13:24:59
6	Utkarsh Agrawal	580	C++	2019-02-24 12:45:11
7	Garðar Ingvarsson	581	C++	2019-04-09 21:41:56
8	Kieran Horgan	582	C++	2017-08-27 20:24:02
9	Austin Fernandez	586	C++	2019-08-27 22:50:06
10	Syx Pek	587	C++	2016-02-03 20:00:28

#	User	Length	Language	Date
1	Ilya Antipin	789	Go	2017-01-20 15:02:55
2	Ronas Jacob Coban Olsen	1390	Go	2025-08-06 10:41:06

#	User	Length	Language	Date
1	César Antonio Carvajal de la Haza	733	Haskell	2017-04-30 15:51:28
2	Patrik Lilja	748	Haskell	2016-05-02 22:37:18
3	Brian Hwang	790	Haskell	2021-09-17 03:01:13
4	Josenildo Silva	861	Haskell	2017-02-18 13:32:26
5	Alberto Cerezo Cid	874	Haskell	2018-10-26 18:45:56
6	Brent Yorgey	879	Haskell	2017-10-03 13:07:08
7	Max Jackson	909	Haskell	2016-05-02 08:01:24
8	Abel Martin	1452	Haskell	2018-10-29 19:50:10
9	Yamato Matsuoka	1455	Haskell	2016-06-04 05:20:37
10	Hidden user	4115	Haskell	2022-02-13 06:14:25

#	User	Length	Language	Date
1	Sikandar Bakht	847	Java	2020-04-07 16:20:10
2	Love Almgren	882	Java	2017-01-23 15:01:28
3	Jordan Lamkin	917	Java	2017-01-28 01:11:31
4	Yousef Absi	930	Java	2020-07-06 03:34:56
5	Chance Page	934	Java	2017-04-10 01:38:03
6	Nathan Gossett	934	Java	2018-08-09 21:22:34
7	Doug Goodman	980	Java	2016-09-04 17:33:17
8	Jiru Xu	980	Java	2017-10-05 00:49:45
9	Matej Papik	1026	Java	2016-10-03 17:15:25
10	Crystal Sharpe	1053	Java	2020-02-07 14:56:47

#	User	Length	Language	Date
1	Minh Trang Nguyen	962	JavaScript (Node.js)	2025-10-20 13:27:29

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	657	JavaScript (SpiderMonkey)	2016-05-01 02:50:59
2	Nicklas Utgaard	879	JavaScript (SpiderMonkey)	2017-11-22 23:25:11
3	Christian Pilegaard Cederquist	916	JavaScript (SpiderMonkey)	2023-06-28 16:26:55

#	User	Length	Language	Date
1	Danny Robinson	243	Julia	2023-10-06 09:52:14
2	Hidden user	280	Julia	2025-04-21 10:47:28
3	Timothy Gaede	1345	Julia	2024-05-01 19:07:11

#	User	Length	Language	Date
1	Steinar Simonnes	495	Kotlin	2025-09-04 08:53:23
2	Eloy Hernández	785	Kotlin	2021-10-08 18:33:08
3	Adam Koprowski	932	Kotlin	2021-07-15 11:42:25
4	Hidden user	959	Kotlin	2021-05-04 11:53:49
5	Mark Mathis	1029	Kotlin	2018-10-14 22:27:42
6	Hidden user	1558	Kotlin	2020-05-09 10:54:55

#	User	Length	Language	Date
1	Anthony Gillespie	1134	Lua	2024-09-18 15:53:23

#	User	Length	Language	Date
1	Joseph Chau	2748	Pascal	2024-02-03 00:19:50

#	User	Length	Language	Date
1	Thomas Feld	361	Python 2	2020-06-23 14:31:59
2	Andreas Björklund	419	Python 2	2020-03-08 09:42:24
3	Paul Leung	454	Python 2	2017-10-27 15:54:52
4	Martin Wan	471	Python 2	2018-01-25 05:48:10
5	Daniel Strizhevsky	572	Python 2	2017-06-27 08:22:24
6	Grant Ballard	576	Python 2	2019-04-16 22:15:51
7	Frederik Højholt	606	Python 2	2016-07-05 21:51:56
8	Jesper Öqvist	637	Python 2	2018-08-12 01:12:01
9	Jasper Lu	641	Python 2	2017-06-27 02:56:15
10	Alfredo Beaumont	641	Python 2	2017-08-12 10:13:26

#	User	Length	Language	Date
1	David Aldenbro	289	Python 3	2025-10-21 22:08:09
2	Victor Zheng	366	Python 3	2017-05-13 20:16:03
3	Lawry Sorenson	384	Python 3	2024-01-26 03:51:51
4	Oskar Haarklou Veileborg	386	Python 3	2020-04-07 11:14:55
5	Rafael Kristoforus Yanto	411	Python 3	2025-05-09 12:06:23
6	Edvard Walde Heimdal	425	Python 3	2024-10-01 21:33:03
7	Bjørn Dons	429	Python 3	2018-10-14 19:38:09
8	Arend Spijker	429	Python 3	2025-10-23 23:16:46
9	Kelly Dance	431	Python 3	2022-08-11 03:28:57
10	Guk Yi Siong	439	Python 3	2025-02-10 18:24:48

#	User	Length	Language	Date
1	Thomas Feld	174	Ruby	2023-10-16 15:34:30
2	Hidden user	690	Ruby	2021-03-12 07:03:56
3	Kieran Maharaj	941	Ruby	2020-07-02 14:07:34
4	Florent Thomas-Morel	1288	Ruby	2016-11-24 15:04:29

#	User	Length	Language	Date
1	Alex Loiko	1000	Rust	2021-07-08 17:38:23
2	David Rasch	1088	Rust	2020-07-30 17:01:22
3	Chen Weikang	1243	Rust	2019-01-06 23:08:33
4	Chaoyi Yin	1307	Rust	2019-01-06 23:13:38
5	Bas Dirks	1399	Rust	2022-02-04 21:26:36
6	Marcus Dicander	1925	Rust	2021-07-08 17:55:25
7	Jiaye Will Wang	2161	Rust	2025-09-09 05:32:28
8	Isak Jägberg	3152	Rust	2021-01-07 10:39:55
9	Egor Kulikov	39310	Rust	2025-03-21 09:32:14

Solution running time distribution