Problem A
Training — Problem Statistics

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Submissions	2286
Accepted submissions	1112
Submission ratio	48.64%
Authors	988
Full solves [?]	923
Full solve Ratio	93.42%

#	User	Runtime	Language	Date
1	Thomas Feld	0.04 s	Bash	2024-02-27 13:14:09
2	Danny Robinson	0.04 s	Bash	2024-08-28 20:51:01
3	Chenzhang Hu	0.19 s	Bash	2024-06-26 17:30:55

#	User	Runtime	Language	Date
1	Joacim Wärn	0.00 s	C	2025-05-04 11:53:13
2	Hidden user	0.00 s	C	2025-05-20 19:05:33
3	Bergur Snorrason	0.01 s	C	2024-03-05 13:14:38
4	Guangyi Zhou	0.01 s	C	2025-04-04 10:44:37
5	Jarry Yang	0.02 s	C	2024-02-24 20:52:02
6	Brian Stuart	0.02 s	C	2024-02-24 22:30:27
7	Ahmad Abdulaal	0.02 s	C	2024-02-25 12:47:23
8	Mattia Marziali	0.02 s	C	2024-02-26 11:50:36
9	Allan Nouri	0.02 s	C	2024-02-28 19:41:43
10	Hidden user	0.02 s	C	2024-03-10 15:44:15

#	User	Runtime	Language	Date
1	Stefan Gillsbro Carrillo	0.07 s	C#	2024-02-27 21:26:30
2	Esty Crow	0.07 s	C#	2024-03-02 20:36:49
3	Benjamin Bilbeau	0.07 s	C#	2024-04-25 19:37:23
4	traxex	0.07 s	C#	2024-04-29 16:13:49
5	A.R.	0.07 s	C#	2024-08-29 23:04:47
6	Nicke Nyfiken	0.07 s	C#	2025-03-14 15:31:53
7	Jan Matthiessen	0.08 s	C#	2024-03-30 23:37:05
8	Michael Damsgaard	0.09 s	C#	2024-11-16 17:30:27
9	Dennis Stegnell	0.10 s	C#	2024-02-27 03:10:43
10	Sano Gharzani	0.10 s	C#	2024-02-27 21:54:42

#	User	Runtime	Language	Date
1	Øyvind Almli	0.00 s	C++	2024-02-25 14:57:27
2	Jonathan Hallström	0.00 s	C++	2024-02-28 12:26:10
3	Lee Heng Sheng	0.00 s	C++	2024-05-26 09:24:08
4	Alexander Kravberg	0.01 s	C++	2024-09-22 00:04:40
5	Nic Washbourne	0.02 s	C++	2024-02-24 20:04:21
6	Luka Mushkudiani	0.02 s	C++	2024-02-24 20:11:04
7	Kevin Sun	0.02 s	C++	2024-02-24 20:18:45
8	Jiahao Fu	0.02 s	C++	2024-02-24 20:19:19
9	Zack Lee	0.02 s	C++	2024-02-24 20:19:47
10	Paul Liu	0.02 s	C++	2024-02-24 20:27:52

#	User	Runtime	Language	Date
1	Norbert Voelker	0.02 s	Go	2024-02-25 15:49:10
2	Jimmy Nejtron	0.12 s	Go	2024-04-19 11:53:59
3	Martin Stensgård	0.13 s	Go	2024-04-01 05:02:10

#	User	Runtime	Language	Date
1	Øyvind Almli	0.02 s	Haskell	2024-02-25 14:43:36
2	Steinar Simonnes	0.03 s	Haskell	2024-02-25 14:28:51
3	Ng Tek In	0.03 s	Haskell	2024-06-19 18:46:20
4	Ramesh baskaran	0.39 s	Haskell	2024-10-16 04:14:33
5	Jan Hrček	0.40 s	Haskell	2024-12-06 17:13:13
6	vagabundus	0.42 s	Haskell	2024-04-28 01:20:09
7	Daniel Cabral	0.47 s	Haskell	2024-02-29 10:41:33
8	Rudy Matela	0.48 s	Haskell	2024-03-19 13:04:18
9	David Zacek	0.50 s	Haskell	2024-03-10 01:00:37
10	Daniel Venable	0.63 s	Haskell	2025-10-28 01:05:49

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.07 s	Java	2024-03-09 17:11:29
2	Lee Heng Sheng	0.07 s	Java	2024-04-17 08:10:02
3	Alex Tilgreen Mogensen	0.15 s	Java	2024-03-02 16:08:21
4	Ku Brian	0.25 s	Java	2024-04-29 09:14:35
5	Albert Meza	0.25 s	Java	2024-11-14 02:09:23
6	Stela Palii	0.26 s	Java	2024-12-15 19:51:11
7	Brent Yorgey	0.27 s	Java	2024-02-24 22:53:04
8	Mark Sturtevant	0.27 s	Java	2024-02-25 06:05:42
9	Julius Griebel	0.27 s	Java	2024-03-01 02:28:47
10	Ranjith M	0.28 s	Java	2024-02-24 22:00:32

#	User	Runtime	Language	Date
1	Nelson AZONHOU	0.13 s	JavaScript (Node.js)	2024-06-09 22:18:53
2	Faisal Rahman	0.18 s	JavaScript (Node.js)	2024-03-02 11:16:48
3	Navjot Kaur	0.18 s	JavaScript (Node.js)	2025-06-18 07:12:17
4	Hidden user	0.22 s	JavaScript (Node.js)	2024-10-18 02:09:36
5	Prateek Sapkota	0.25 s	JavaScript (Node.js)	2025-06-07 00:48:30

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.09 s	JavaScript (SpiderMonkey)	2024-02-25 02:20:48
2	Jimmy Gustafsson	0.09 s	JavaScript (SpiderMonkey)	2024-06-10 15:02:56
3	Evan Magill	0.10 s	JavaScript (SpiderMonkey)	2024-04-14 08:08:32
4	Christian Pilegaard Cederquist	0.13 s	JavaScript (SpiderMonkey)	2024-02-27 15:23:48
5	Zach Tschetter	0.13 s	JavaScript (SpiderMonkey)	2024-03-01 00:22:00

#	User	Runtime	Language	Date
1	Timothy Gaede	0.55 s	Julia	2024-03-19 03:04:17
2	Danny Robinson	0.98 s	Julia	2024-08-28 20:37:27

#	User	Runtime	Language	Date
1	Martijn Muijsers	0.45 s	Kotlin	2024-05-28 10:37:58
2	Adam Rankin	0.47 s	Kotlin	2024-05-05 04:33:46
3	Emil Wihlander	0.47 s	Kotlin	2024-07-16 22:19:47
4	Troy Warmboe	0.48 s	Kotlin	2024-04-06 00:59:03

#	User	Runtime	Language	Date
1	Zeheng Li	0.03 s	Lua	2024-04-17 10:36:49

#	User	Runtime	Language	Date
1	Artemis Ngoh	0.03 s	OCaml	2024-03-03 16:14:34
2	Fredrik Eriksson	0.04 s	OCaml	2024-10-25 20:47:40

#	User	Runtime	Language	Date
1	Hidden user	0.13 s	Odin	2025-05-20 18:49:25

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.03 s	Pascal	2024-03-08 09:58:45
2	David Connolly	0.03 s	Pascal	2024-03-15 16:10:17

#	User	Runtime	Language	Date
1	Saito Ta	0.56 s	Perl	2024-04-03 10:01:30

#	User	Runtime	Language	Date
1	crapcode	0.05 s	PHP	2024-03-08 11:32:56
2	Renate Fiala-Lundström	0.05 s	PHP	2024-04-07 10:45:40

#	User	Runtime	Language	Date
1	Hidden user	0.06 s	Python 3	2024-09-12 22:19:06
2	Cole Brassington	0.06 s	Python 3	2024-09-12 22:38:26
3	Kovas D. Jeleniauskas	0.06 s	Python 3	2024-09-12 23:08:52
4	Petr	0.06 s	Python 3	2024-10-09 23:09:54
5	Hidden user	0.06 s	Python 3	2026-02-15 17:36:13
6	Wade Weston	0.07 s	Python 3	2024-09-12 22:37:43
7	Hiep Nguyen	0.07 s	Python 3	2024-09-12 23:29:51
8	Hidden user	0.07 s	Python 3	2024-10-03 14:59:21
9	Dominic Berzin Chua Way Gin	0.07 s	Python 3	2025-03-15 10:52:56
10	Philipp Schneider	0.07 s	Python 3	2025-06-07 06:59:57

#	User	Runtime	Language	Date
1	Frederik Petersen	0.14 s	Ruby	2024-04-03 17:04:46
2	Thomas Feld	0.17 s	Ruby	2024-02-27 13:06:50
3	Matzuka	0.17 s	Ruby	2025-12-02 20:10:53

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.00 s	Rust	2024-12-24 18:27:03
2	Artur Khuziakhmetov	0.00 s	Rust	2025-11-20 11:23:32
3	Bas Dirks	0.01 s	Rust	2024-03-03 06:16:46
4	Frank Endriss	0.01 s	Rust	2024-05-31 14:11:58
5	Mikael Fiala-Lundström	0.01 s	Rust	2026-02-22 02:52:57
6	Winston Wu	0.02 s	Rust	2024-03-02 08:35:59
7	Aza Maulana Hadi	0.02 s	Rust	2024-03-15 07:54:13
8	David Rasch	0.02 s	Rust	2024-04-02 12:08:51
9	Pankajkumar Patro	0.02 s	Rust	2024-08-11 19:47:50
10	Isak Jägberg	0.02 s	Rust	2024-10-18 13:30:11

#	User	Length	Language	Date
1	Danny Robinson	45	Bash	2024-08-28 20:51:01
2	Chenzhang Hu	48	Bash	2025-09-12 15:54:53
3	Thomas Feld	49	Bash	2024-02-27 13:15:40

#	User	Length	Language	Date
1	Mattia Marziali	87	C	2024-02-26 11:56:31
2	Martin Blom	94	C	2024-06-13 19:21:30
3	Ahmad Abdulaal	127	C	2024-02-25 12:51:02
4	Hidden user	209	C	2024-03-10 15:44:15
5	Jarry Yang	218	C	2024-02-24 20:52:02
6	Mirel Cosulschi	223	C	2024-09-24 14:16:28
7	Hidden user	241	C	2024-09-27 14:46:58
8	Hampus Wahlin	248	C	2025-01-07 10:59:03
9	Børge Bjørnstadjordet	251	C	2024-06-28 15:40:08
10	Allan Nouri	256	C	2024-02-28 19:41:43

#	User	Length	Language	Date
1	traxex	333	C#	2024-04-29 16:13:49
2	Freek van Keulen	427	C#	2024-03-07 10:27:17
3	Nicke Nyfiken	439	C#	2025-03-14 15:31:53
4	Esty Crow	442	C#	2024-03-02 20:36:49
5	Benjamin Bilbeau	600	C#	2024-04-25 19:37:23
6	Jan Matthiessen	619	C#	2024-03-30 23:37:05
7	Umar Rasyid	674	C#	2025-01-10 06:59:44
8	Dennis Stegnell	719	C#	2024-02-27 03:10:43
9	Michael Damsgaard	720	C#	2024-11-16 17:30:27
10	A.R.	824	C#	2024-08-29 23:04:47

#	User	Length	Language	Date
1	Nathan Duncan	98	C++	2024-02-26 05:30:12
2	Ahmad Abdulaal	113	C++	2024-02-25 12:54:04
3	Evan Michael Bailey	175	C++	2024-02-25 17:25:28
4	Grae Yeandle	186	C++	2024-02-25 13:13:27
5	Buste Alin	186	C++	2025-02-06 20:20:36
6	Lucas Hasting	190	C++	2024-02-24 21:00:00
7	Adrien	190	C++	2024-03-19 22:51:21
8	Jesús Pacheco Alonso	196	C++	2024-02-26 18:16:15
9	Jack H	197	C++	2024-02-29 23:53:07
10	Jamil	204	C++	2024-03-04 06:36:44

#	User	Length	Language	Date
1	Jimmy Nejtron	280	Go	2024-04-19 11:53:59
2	Martin Stensgård	326	Go	2024-04-01 05:02:10
3	Norbert Voelker	539	Go	2024-02-25 15:49:10

#	User	Length	Language	Date
1	Daniel Cabral	195	Haskell	2024-02-29 10:50:35
2	Øyvind Almli	217	Haskell	2024-02-25 14:38:51
3	Daniel Venable	262	Haskell	2025-10-28 01:05:49
4	Ramesh baskaran	288	Haskell	2024-10-16 04:14:33
5	vagabundus	340	Haskell	2024-04-28 01:20:09
6	Greg Rosser	347	Haskell	2024-03-10 21:29:13
7	David Zacek	375	Haskell	2024-03-10 01:00:37
8	Jan Hrček	391	Haskell	2024-12-06 17:13:13
9	Rudy Matela	409	Haskell	2024-03-19 13:04:18
10	Steinar Simonnes	566	Haskell	2024-02-25 14:28:51

#	User	Length	Language	Date
1	Rasmus Streubel Nielsen	249	Java	2024-07-29 21:57:31
2	John Hershey	323	Java	2024-02-27 03:33:05
3	Adam Downs	350	Java	2024-02-24 20:49:06
4	Nick Wu	354	Java	2024-02-27 00:48:04
5	Shardul Dhongade	368	Java	2024-02-24 20:48:36
6	Arup Ratan Guha	372	Java	2024-02-25 00:52:11
7	Daniel Thomas Gehman	374	Java	2024-10-17 22:51:03
8	Lam Phuoc Huy	379	Java	2024-08-15 20:12:51
9	Mark van Helvoort	392	Java	2024-03-19 13:57:25
10	dow phin	393	Java	2024-04-22 18:37:43

#	User	Length	Language	Date
1	Navjot Kaur	392	JavaScript (Node.js)	2025-06-18 07:12:17
2	Faisal Rahman	479	JavaScript (Node.js)	2024-03-02 11:16:48
3	Hidden user	668	JavaScript (Node.js)	2024-10-18 02:09:36
4	Nelson AZONHOU	675	JavaScript (Node.js)	2024-06-09 22:18:53
5	Prateek Sapkota	1359	JavaScript (Node.js)	2025-06-07 00:48:30

#	User	Length	Language	Date
1	Jimmy Gustafsson	103	JavaScript (SpiderMonkey)	2024-06-10 15:04:24
2	Bjørn Chr. Soltvedt	106	JavaScript (SpiderMonkey)	2024-02-25 02:22:08
3	Evan Magill	149	JavaScript (SpiderMonkey)	2024-04-14 08:08:32
4	Zach Tschetter	159	JavaScript (SpiderMonkey)	2024-03-01 00:22:00
5	Christian Pilegaard Cederquist	254	JavaScript (SpiderMonkey)	2024-02-27 15:23:48

#	User	Length	Language	Date
1	Danny Robinson	101	Julia	2024-08-28 20:37:27
2	Timothy Gaede	571	Julia	2024-03-19 03:04:17

#	User	Length	Language	Date
1	Emil Wihlander	320	Kotlin	2024-07-16 22:19:47
2	Adam Rankin	367	Kotlin	2024-05-05 04:33:46
3	Troy Warmboe	432	Kotlin	2024-04-06 00:59:03
4	Martijn Muijsers	568	Kotlin	2024-05-28 10:37:58

#	User	Length	Language	Date
1	Zeheng Li	122	Lua	2024-04-17 10:36:49

#	User	Length	Language	Date
1	Fredrik Eriksson	254	OCaml	2024-10-25 20:47:40
2	Artemis Ngoh	1005	OCaml	2024-03-03 16:14:34

#	User	Length	Language	Date
1	Hidden user	600	Odin	2025-05-20 18:49:25

#	User	Length	Language	Date
1	Ingemar Ragnemalm	200	Pascal	2024-03-08 09:58:45
2	David Connolly	287	Pascal	2024-03-15 16:10:17

#	User	Length	Language	Date
1	Saito Ta	77	Perl	2024-04-03 10:01:30

#	User	Length	Language	Date
1	Renate Fiala-Lundström	184	PHP	2024-04-07 10:45:40
2	crapcode	315	PHP	2024-03-08 11:32:56

#	User	Length	Language	Date
1	Lasse Letager Hansen	83	Python 3	2024-02-27 16:29:45
2	Kevin Gomez	83	Python 3	2024-03-22 04:05:10
3	Farzam Abrishami	83	Python 3	2024-04-28 22:30:27
4	Daniel Bogorad	86	Python 3	2025-10-15 01:56:53
5	Shashank Bhatt	91	Python 3	2024-02-26 18:52:24
6	Teikn Smith	91	Python 3	2024-02-28 01:23:38
7	Kévin Dubrulle	91	Python 3	2024-04-06 15:32:07
8	Harry Zhang	99	Python 3	2024-02-27 00:55:21
9	András Biczó	103	Python 3	2024-02-28 18:49:03
10	David Worley	103	Python 3	2024-03-09 20:44:35

#	User	Length	Language	Date
1	Thomas Feld	64	Ruby	2024-02-27 13:09:21
2	Matzuka	85	Ruby	2025-12-02 20:13:07
3	Frederik Petersen	98	Ruby	2024-04-03 17:04:46

#	User	Length	Language	Date
1	Artur Khuziakhmetov	335	Rust	2025-11-20 11:33:46
2	Vincent Lagerros	340	Rust	2024-12-24 18:23:03
3	Emil Dichmann	404	Rust	2025-09-23 12:21:06
4	David Rasch	463	Rust	2024-04-02 12:10:24
5	Aza Maulana Hadi	602	Rust	2024-03-15 08:05:05
6	Mikael Fiala-Lundström	655	Rust	2026-02-22 02:52:57
7	Winston Wu	712	Rust	2024-03-02 08:35:59
8	Pankajkumar Patro	808	Rust	2024-08-11 19:47:50
9	Isak Jägberg	859	Rust	2024-10-18 13:30:11
10	Bas Dirks	944	Rust	2024-03-03 06:16:46

Solution running time distribution