Problem A
Happy Happy Prime Prime — Problem Statistics

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Submissions	8032
Accepted submissions	3319
Submission ratio	41.32%
Authors	2700
Full solves [?]	2389
Full solve Ratio	88.48%

#	User	Runtime	Language	Date
1	Jakub Jarząbek	0.03 s	C#	2020-10-15 21:21:17
2	Raja Sanjeev Kumar Nakka	0.05 s	C#	2016-06-23 14:42:27
3	Robert Low	0.05 s	C#	2016-07-30 13:09:51
4	Marek	0.05 s	C#	2016-09-21 18:20:19
5	Andrzej Krajniak	0.05 s	C#	2016-09-22 06:10:05
6	Stephen (Joe) Malone	0.05 s	C#	2018-02-24 19:32:05
7	Soujatya Sanyal	0.05 s	C#	2019-02-09 21:51:45
8	Samuel Leclerc	0.05 s	C#	2021-04-16 18:27:05
9	Khin Nyunt	0.06 s	C#	2016-12-11 14:43:39
10	Mirjam Skobe	0.06 s	C#	2016-12-11 17:39:19

#	User	Runtime	Language	Date
1	Ari Páll Agnarsson	0.07 s	Common Lisp	2021-03-21 03:44:54

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.08 s	F#	2022-11-29 17:02:40

#	User	Runtime	Language	Date
1	Nischal Bhandari	0.02 s	Go	2025-05-16 20:40:33
2	Ola Dahl	0.08 s	Go	2022-11-06 15:14:56
3	Krzysztof Gibuła	0.11 s	Go	2021-05-11 21:59:36
4	Norbert Voelker	0.13 s	Go	2021-07-06 19:36:48
5	Matthew Sheldon	0.13 s	Go	2023-09-08 20:16:33
6	Julian Duniec	0.17 s	Go	2024-09-10 10:57:51
7	Christoffer Danborg Irvall	0.25 s	Go	2019-05-07 22:07:29
8	Matthew Chao	0.26 s	Go	2018-05-06 18:12:18

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.01 s	Haskell	2024-06-25 09:13:03
2	Wilfried van Asten	0.02 s	Haskell	2015-12-20 10:35:32
3	Mattias Harrysson	0.04 s	Haskell	2015-11-18 17:49:26
4	Anthony Clark	0.05 s	Haskell	2017-03-04 04:09:32
5	Jared Beller	0.05 s	Haskell	2018-02-23 04:49:11
6	Maria De La Torre Romo	0.06 s	Haskell	2018-02-24 17:58:46
7	Jørn Lode	0.06 s	Haskell	2020-10-06 16:53:59
8	Hidden user	0.07 s	Haskell	2019-11-05 15:33:03
9	Gustaf Pihl	0.07 s	Haskell	2024-04-14 01:06:19
10	Hidden user	0.14 s	Haskell	2019-05-10 15:23:30

#	User	Runtime	Language	Date
1	Guangyi Zhou	0.07 s	Java	2024-12-12 12:07:27
2	Samuel Klingström	0.08 s	Java	2017-05-11 17:48:12
3	Sven Rönnbäck	0.08 s	Java	2022-03-27 15:17:14
4	Đức Phạm Hoài	0.09 s	Java	2018-10-12 15:43:01
5	Issa Issack	0.09 s	Java	2025-02-20 03:01:44
6	Winston Cheung	0.10 s	Java	2017-03-05 02:00:23
7	José Vander Meulen	0.10 s	Java	2018-04-30 18:50:12
8	Dat Vo Nguyen Tien	0.10 s	Java	2022-01-31 03:27:09
9	Đỗ Duy Tân	0.11 s	Java	2015-10-21 02:15:11
10	Tú Huỳnh	0.11 s	Java	2015-10-21 04:14:55

#	User	Runtime	Language	Date
1	Khin Nyunt	0.67 s	JavaScript (Node.js)	2021-11-15 15:29:09

#	User	Runtime	Language	Date
1	Jimmy Gustafsson	0.05 s	JavaScript (SpiderMonkey)	2024-08-02 22:37:07
2	Christian Pilegaard Cederquist	0.07 s	JavaScript (SpiderMonkey)	2023-02-15 09:34:37
3	Zach Tschetter	0.08 s	JavaScript (SpiderMonkey)	2023-05-03 15:27:00
4	Peter Kedemo	0.09 s	JavaScript (SpiderMonkey)	2016-06-11 19:30:16
5	Bjørn Chr. Soltvedt	0.35 s	JavaScript (SpiderMonkey)	2016-02-21 20:01:07
6	J M	0.35 s	JavaScript (SpiderMonkey)	2016-10-07 13:33:25
7	Caullen Sasnett	0.98 s	JavaScript (SpiderMonkey)	2018-02-24 18:01:39

#	User	Runtime	Language	Date
1	Timothy Gaede	0.76 s	Julia	2024-04-10 06:36:51
2	Danny Robinson	0.82 s	Julia	2023-09-11 15:04:04

#	User	Runtime	Language	Date
1	Sam Keyser	0.28 s	Kotlin	2023-04-17 01:05:40
2	Silas Lenz	0.34 s	Kotlin	2019-05-06 12:04:13
3	Hidden user	0.44 s	Kotlin	2017-11-28 23:50:11
4	Dayan Ruben Gonzalez	0.48 s	Kotlin	2020-10-02 04:29:25
5	Neil Harmon	0.56 s	Kotlin	2019-09-26 12:31:36
6	Adam Rankin	0.82 s	Kotlin	2023-05-05 19:58:47

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	OCaml	2024-09-30 15:33:36

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2017-08-23 14:19:43

#	User	Runtime	Language	Date
1	Nguyen Phuoc Loc (FUG CT)	0.06 s	PHP	2023-12-23 21:19:22

#	User	Runtime	Language	Date
1	Rhys Balevicius	0.05 s	Python 2	2017-10-30 23:00:07
2	Andrei Stoica	0.06 s	Python 2	2017-10-25 16:34:49
3	Oskar Haarklou Veileborg	0.07 s	Python 2	2015-12-11 11:16:30
4	Denis Godunov	0.07 s	Python 2	2017-05-26 12:14:59
5	Sigurður Jens Albertsson	0.07 s	Python 2	2017-11-30 23:40:47
6	Hidden user	0.08 s	Python 2	2015-11-21 21:39:44
7	Asger Hautop Drewsen	0.08 s	Python 2	2016-01-27 14:16:17
8	Kjetil Børs-Lind	0.08 s	Python 2	2018-01-25 18:15:18
9	Bertrand Evertz	0.08 s	Python 2	2019-11-01 10:36:23
10	Lars Tveito	0.09 s	Python 2	2016-09-11 20:54:31

#	User	Runtime	Language	Date
1	Sam Westigard	0.03 s	Python 3	2018-04-02 05:33:59
2	Markus	0.03 s	Python 3	2019-06-27 19:32:42
3	Christian Lindeström	0.04 s	Python 3	2016-08-17 22:25:19
4	Arturas Aleksandrauskas	0.04 s	Python 3	2019-04-17 20:01:14
5	Wayne	0.05 s	Python 3	2016-01-25 11:48:08
6	Robin Andersson	0.05 s	Python 3	2016-05-01 09:38:36
7	Nicholas Lantz	0.05 s	Python 3	2016-10-22 01:54:40
8	Duke Nguyen	0.05 s	Python 3	2017-06-22 03:42:28
9	Hidden user	0.05 s	Python 3	2018-03-24 18:05:37
10	Fred Bloggs	0.05 s	Python 3	2019-03-16 06:30:16

#	User	Runtime	Language	Date
1	Hidden user	0.08 s	Ruby	2019-11-18 11:53:11
2	Hidden user	0.08 s	Ruby	2020-08-01 14:57:39
3	Thomas Feld	0.08 s	Ruby	2023-05-03 12:54:54
4	Clifford Owino	0.11 s	Ruby	2017-06-27 20:31:06
5	Robin Boregrim	0.13 s	Ruby	2018-04-26 17:19:57

#	User	Runtime	Language	Date
1	Davíð Helgason	0.00 s	Rust	2020-03-11 16:43:12
2	Kristinn Vikar	0.00 s	Rust	2023-10-17 15:53:42
3	Egor Kulikov	0.00 s	Rust	2025-01-08 13:25:57
4	Vincent Lagerros	0.00 s	Rust	2025-01-30 21:20:12
5	Aaron Lengyel	0.01 s	Rust	2023-04-28 23:54:51
6	Leo Jarhede	0.01 s	Rust	2025-04-25 06:25:02
7	Joe Blower	0.01 s	Rust	2025-09-04 00:34:02
8	Isak Jägberg	0.02 s	Rust	2019-05-05 15:54:35
9	David Rasch	0.02 s	Rust	2021-03-08 16:27:45
10	Bas Dirks	0.02 s	Rust	2022-01-14 23:33:14

#	User	Runtime	Language	Date
1	Robert Morelli	0.02 s	Swift	2024-10-28 04:18:58

#	User	Length	Language	Date
1	furtive	575	C	2020-09-29 14:44:08
2	Aljon Novelo	842	C	2024-05-10 11:53:37
3	Ryan O'Hara	914	C	2017-11-08 01:59:16
4	Adam Evans	926	C	2016-08-29 21:42:58
5	Felix Skjutar	956	C	2023-04-18 15:45:15
6	Sami Al Chalati	1071	C	2024-07-12 13:46:29
7	Duane Currie	1079	C	2020-02-02 13:50:47
8	Ling Wen Jian	1092	C	2019-01-10 16:53:38
9	Eric Dand	1093	C	2017-03-09 04:03:43
10	Kyle Fairfax	1137	C	2018-02-24 18:57:10

#	User	Length	Language	Date
1	traxex	881	C#	2024-05-07 09:51:26
2	Þorsteinn Þorvaldsson	1487	C#	2017-06-04 20:05:45
3	Robert Low	1517	C#	2016-07-30 13:09:51
4	florist swe	1548	C#	2024-12-05 00:34:36
5	Khin Nyunt	1557	C#	2016-12-11 14:43:39
6	Björn Pettersson	1591	C#	2018-10-15 21:51:11
7	Jerome Beaulieu	1592	C#	2021-04-16 18:54:24
8	Raphael Albiez	1638	C#	2018-10-10 06:45:20
9	Vincent Paradis	1732	C#	2021-04-16 18:07:56
10	Simon Grey	1805	C#	2018-10-12 20:31:47

#	User	Length	Language	Date
1	Yeung Man Tsung	495	C++	2022-11-20 09:53:13
2	Johan Wind	539	C++	2018-09-02 21:08:22
3	Zane Yu	573	C++	2019-01-03 08:01:04
4	Lawrence Li	591	C++	2018-03-23 23:48:55
5	Mustefa Kamil	610	C++	2019-05-02 19:31:32
6	Izzati Al Vandiar	632	C++	2016-03-02 16:27:50
7	Oisín O'Duibhir	642	C++	2018-10-05 12:23:05
8	Josenildo Silva	650	C++	2017-04-10 03:03:24
9	Công Hậu Trần	661	C++	2016-04-08 13:15:36
10	Sidhant Bansal	662	C++	2019-09-17 08:39:37

#	User	Length	Language	Date
1	Ari Páll Agnarsson	11443	Common Lisp	2021-03-21 03:44:54

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	1458	F#	2022-11-29 16:59:13

#	User	Length	Language	Date
1	Julian Duniec	736	Go	2024-09-10 10:57:51
2	Nischal Bhandari	931	Go	2025-05-16 20:40:33
3	Krzysztof Gibuła	1024	Go	2021-05-11 21:59:36
4	Matthew Sheldon	1029	Go	2023-09-08 20:16:33
5	Norbert Voelker	1555	Go	2021-07-06 19:36:48
6	Matthew Chao	1829	Go	2018-05-06 18:12:18
7	Ola Dahl	1907	Go	2022-11-06 15:14:56
8	Christoffer Danborg Irvall	1943	Go	2019-05-07 22:07:29

#	User	Length	Language	Date
1	Gustaf Pihl	470	Haskell	2024-04-14 01:23:51
2	Brandon Tang	640	Haskell	2023-09-06 08:27:07
3	Anthony Clark	706	Haskell	2017-03-04 04:09:32
4	Hidden user	732	Haskell	2019-05-10 15:23:30
5	Jared Beller	765	Haskell	2018-02-23 04:49:11
6	Jørn Lode	989	Haskell	2020-10-06 16:53:59
7	César Antonio Carvajal de la Haza	1021	Haskell	2017-05-01 18:59:03
8	JD Hoglan	1158	Haskell	2016-05-04 21:10:22
9	Mattias Harrysson	1173	Haskell	2015-11-18 17:49:26
10	Maria De La Torre Romo	1304	Haskell	2018-02-24 17:58:46

#	User	Length	Language	Date
1	Amon Al-khatib	851	Java	2015-12-19 21:01:59
2	Benjamin Scott Pruett	871	Java	2015-10-17 17:26:07
3	Tobias Lehnert	899	Java	2018-05-03 16:39:10
4	Pedro Contipelli	908	Java	2016-04-25 22:50:29
5	Hidden user	925	Java	2022-11-10 11:02:53
6	Pramitha Jayasooriya	928	Java	2024-02-04 01:40:50
7	Duncan Page	932	Java	2017-09-11 22:10:11
8	Ada Clevinger	936	Java	2018-06-02 17:16:08
9	Marcus Phua	952	Java	2018-06-11 08:49:58
10	Weiyu Wang	961	Java	2017-10-01 18:04:58

#	User	Length	Language	Date
1	Khin Nyunt	2006	JavaScript (Node.js)	2021-11-15 15:29:09

#	User	Length	Language	Date
1	Jimmy Gustafsson	310	JavaScript (SpiderMonkey)	2024-08-02 22:37:07
2	Zach Tschetter	705	JavaScript (SpiderMonkey)	2023-05-03 15:27:00
3	Christian Pilegaard Cederquist	744	JavaScript (SpiderMonkey)	2023-02-15 09:34:37
4	Caullen Sasnett	1359	JavaScript (SpiderMonkey)	2018-02-24 18:01:39
5	Bjørn Chr. Soltvedt	6424	JavaScript (SpiderMonkey)	2016-02-21 20:01:07
6	J M	8282	JavaScript (SpiderMonkey)	2016-10-07 13:33:25
7	Peter Kedemo	8924	JavaScript (SpiderMonkey)	2016-06-11 19:30:16

#	User	Length	Language	Date
1	Danny Robinson	184	Julia	2023-09-11 15:04:04
2	Timothy Gaede	2207	Julia	2024-04-10 06:36:51

#	User	Length	Language	Date
1	Dayan Ruben Gonzalez	658	Kotlin	2020-10-02 04:29:25
2	Hidden user	810	Kotlin	2017-11-28 23:50:11
3	Adam Rankin	821	Kotlin	2023-05-05 19:58:47
4	Sam Keyser	1163	Kotlin	2023-04-17 01:05:40
5	Neil Harmon	2219	Kotlin	2019-09-26 12:31:36
6	Silas Lenz	3650	Kotlin	2019-05-06 12:04:13

#	User	Length	Language	Date
1	Hidden user	847	OCaml	2024-09-30 15:33:36

#	User	Length	Language	Date
1	Ingemar Ragnemalm	2257	Pascal	2017-08-23 14:19:43

#	User	Length	Language	Date
1	Nguyen Phuoc Loc (FUG CT)	1118	PHP	2023-12-23 21:19:22

#	User	Length	Language	Date
1	Thomas Feld	476	Python 2	2019-08-26 12:39:28
2	Kjetil Børs-Lind	519	Python 2	2018-01-25 18:15:18
3	Roman Bohuk	531	Python 2	2017-03-08 00:45:31
4	Conor McCauley	531	Python 2	2019-10-28 23:39:06
5	Eoin Davey	546	Python 2	2018-03-27 14:04:07
6	Måns Gezelius	556	Python 2	2018-04-23 23:00:11
7	Oskar Haarklou Veileborg	577	Python 2	2015-12-11 11:16:30
8	Lars Tveito	579	Python 2	2016-09-11 20:54:31
9	Zak Thompson	599	Python 2	2017-05-11 18:03:58
10	Johan Lyts	602	Python 2	2019-03-26 13:23:44

#	User	Length	Language	Date
1	Gustav Elmqvist	168	Python 3	2023-03-02 17:07:00
2	Jorke de Vlas	190	Python 3	2024-04-04 10:28:54
3	Erik Ulff	238	Python 3	2024-03-14 11:10:59
4	Charles Ancheta	283	Python 3	2023-04-18 20:22:47
5	Farzam Abrishami	288	Python 3	2024-01-25 23:08:33
6	Zach Woods	322	Python 3	2018-10-05 21:38:29
7	Karen Birgitta Hanssen	347	Python 3	2023-01-04 00:03:25
8	Tai Tze Kin	348	Python 3	2024-05-07 10:30:04
9	Ari Blondal	385	Python 3	2020-07-03 07:35:13
10	Thibault Raffaillac	407	Python 3	2024-07-29 11:29:55

#	User	Length	Language	Date
1	Thomas Feld	112	Ruby	2023-05-03 12:54:54
2	Hidden user	258	Ruby	2019-11-18 11:47:17
3	Hidden user	377	Ruby	2020-08-01 14:57:39
4	Robin Boregrim	469	Ruby	2018-04-26 17:19:57
5	Clifford Owino	523	Ruby	2017-06-27 20:31:06

#	User	Length	Language	Date
1	David Rasch	948	Rust	2021-03-08 16:27:45
2	Ming Kang	1221	Rust	2025-06-08 06:45:00
3	Lily Gloudemans	1792	Rust	2024-09-24 21:38:51
4	Martin Simensen	2021	Rust	2019-05-13 14:48:40
5	Vincent Lagerros	2031	Rust	2025-01-30 21:15:35
6	Leo Jarhede	2099	Rust	2025-04-25 06:25:02
7	Kristinn Vikar	2242	Rust	2023-10-17 15:29:03
8	Alexander Berntsson	2316	Rust	2025-04-19 20:59:16
9	Abdulsalam Al-Gaaod	2391	Rust	2025-09-10 10:56:44
10	Isak Jägberg	2510	Rust	2019-05-05 15:55:02

#	User	Length	Language	Date
1	Robert Morelli	1006	Swift	2024-10-28 04:18:58

Solution running time distribution