Problem A
iBoard — Problem Statistics

Back to problem description

Submissions	2055
Accepted submissions	922
Submission ratio	44.87%
Authors	871
Full solves [?]	788
Full solve Ratio	90.47%

#	User	Runtime	Language	Date
1	Klas af Geijerstam	0.02 s	C#	2017-04-10 23:41:50
2	Aabir Bahaida	0.02 s	C#	2017-09-04 11:12:00
3	RaeMi	0.02 s	C#	2017-09-04 13:10:05
4	Samir	0.02 s	C#	2019-01-06 18:32:40
5	Mikael Fiala-Lundström	0.02 s	C#	2022-02-17 01:59:16
6	Göran Andersson	0.02 s	C#	2022-06-07 14:17:06
7	Aman Choudhary	0.04 s	C#	2024-05-03 16:19:41
8	Michael Damsgaard	0.04 s	C#	2024-11-05 20:49:40

#	User	Runtime	Language	Date
1	Nicholas Lantz	0.02 s	Common Lisp	2019-05-03 16:57:15

#	User	Runtime	Language	Date
1	Mukhlas Rosyadi	0.00 s	Go	2023-11-15 07:31:56
2	Husain Satan	0.00 s	Go	2023-11-17 01:10:27
3	Ade Hendra	0.00 s	Go	2023-11-25 12:07:15
4	Norbert Voelker	0.07 s	Go	2021-07-06 21:17:38

#	User	Runtime	Language	Date
1	Patrik Lilja	0.00 s	Haskell	2016-05-01 19:24:36
2	Brent Yorgey	0.00 s	Haskell	2017-11-25 05:43:41
3	Aurélien Pepin	0.00 s	Haskell	2019-08-17 21:43:24
4	Hidden user	0.00 s	Haskell	2019-10-27 12:29:57
5	Quinn Flavel	0.00 s	Haskell	2021-01-07 06:23:11
6	Joshua Coward	0.00 s	Haskell	2022-02-01 19:00:02
7	Hidden user	0.00 s	Haskell	2023-01-08 11:24:04
8	Steinar Simonnes	0.00 s	Haskell	2024-03-28 11:49:40
9	Jan Hrček	0.01 s	Haskell	2021-04-01 15:05:40

#	User	Runtime	Language	Date
1	Morten Pedersen	0.05 s	Java	2015-10-14 22:20:19
2	Erik Nyström	0.05 s	Java	2015-12-11 08:16:54
3	Michael Sullivan	0.05 s	Java	2016-02-10 05:09:48
4	Terrence Park	0.05 s	Java	2016-02-12 20:15:27
5	Paul Boddington	0.05 s	Java	2016-05-13 22:34:20
6	Who Am I?	0.05 s	Java	2016-05-25 18:19:11
7	Nick Wu	0.05 s	Java	2016-07-04 19:15:39
8	Mouad Naciri	0.05 s	Java	2016-08-09 00:08:24
9	Micah Stairs	0.05 s	Java	2016-09-04 01:01:37
10	Martijn Muijsers	0.05 s	Java	2016-10-29 02:58:44

#	User	Runtime	Language	Date
1	Greg Gorlen	0.05 s	JavaScript (Node.js)	2025-09-12 04:33:08

#	User	Runtime	Language	Date
1	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2015-12-30 10:16:16
2	Johannes Jensen	0.01 s	JavaScript (SpiderMonkey)	2016-03-06 00:16:13
3	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-03-17 06:59:15
4	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-03-20 10:51:01
5	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2025-07-22 10:05:37

#	User	Runtime	Language	Date
1	Timothy Gaede	0.40 s	Julia	2025-04-05 20:46:27
2	Danny Robinson	0.67 s	Julia	2023-10-11 01:28:57

#	User	Runtime	Language	Date
1	Dayan Ruben Gonzalez	0.15 s	Kotlin	2020-09-28 16:52:54
2	Hidden user	0.16 s	Kotlin	2020-01-06 15:16:10
3	Adam Rankin	0.16 s	Kotlin	2023-05-08 00:14:37
4	Neil Harmon	0.18 s	Kotlin	2019-08-29 15:41:56
5	Aniket Kumar	0.18 s	Kotlin	2024-05-01 16:25:41

#	User	Runtime	Language	Date
1	Artemis Ngoh	0.00 s	OCaml	2024-04-03 19:45:42
2	luna	0.00 s	OCaml	2024-04-04 04:21:01

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2019-11-23 17:14:59

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.01 s	Prolog	2018-12-04 20:09:56

#	User	Runtime	Language	Date
1	Team Baud	0.02 s	Python 2	2015-09-08 19:10:39
2	Arne Tobias Malkenes Ødegaard	0.02 s	Python 2	2015-11-30 10:55:50
3	Kalab Solomon	0.02 s	Python 2	2022-08-03 16:14:27
4	AKA_ OPTIMUS	0.02 s	Python 2	2022-08-03 16:16:17
5	Christofer Ohlsson	0.03 s	Python 2	2015-08-16 20:51:21
6	Johan Wind	0.03 s	Python 2	2015-09-18 18:02:04
7	Asger Hautop Drewsen	0.03 s	Python 2	2015-09-24 10:56:09
8	Lars Tveito	0.03 s	Python 2	2015-09-27 00:11:19
9	Michael Laszlo	0.03 s	Python 2	2016-10-19 23:58:38
10	Haggai Liu	0.03 s	Python 2	2017-03-21 00:03:39

#	User	Runtime	Language	Date
1	Joel De La Cruz	0.02 s	Python 3	2016-09-17 20:48:51
2	Casper Freksen	0.02 s	Python 3	2016-10-05 00:15:57
3	Matthew Casserly	0.02 s	Python 3	2016-10-18 22:37:13
4	Ram Basnet	0.02 s	Python 3	2017-03-09 01:43:41
5	Andrew Gil	0.02 s	Python 3	2017-03-20 05:27:16
6	Axel Matstoms	0.02 s	Python 3	2017-04-19 22:57:52
7	Arnar Bjarni Arnarson	0.02 s	Python 3	2017-05-24 16:49:59
8	Anthony Buchholz	0.02 s	Python 3	2017-06-04 06:58:01
9	Cian Ruane	0.02 s	Python 3	2017-06-18 21:35:19
10	Ciara Godwin	0.02 s	Python 3	2017-07-11 11:33:19

#	User	Runtime	Language	Date
1	Thomas Feld	0.06 s	Ruby	2023-05-02 09:37:35

#	User	Runtime	Language	Date
1	Claes Gustafsson	0.00 s	Rust	2019-01-05 00:39:23
2	David Rasch	0.00 s	Rust	2021-03-25 17:16:09
3	Bas Dirks	0.00 s	Rust	2022-03-11 09:55:15
4	Arnab De	0.00 s	Rust	2022-10-25 16:53:05
5	Erik Magnusson	0.00 s	Rust	2025-01-18 22:16:06
6	Vincent Lagerros	0.00 s	Rust	2025-08-09 00:53:03

#	User	Length	Language	Date
1	Mikael K Eriksson	433	C	2021-09-16 08:21:27
2	klimisnotmilk	468	C	2024-03-01 04:11:12
3	Andrew Roberts	518	C	2017-09-12 07:11:18
4	Team Baud	630	C	2015-09-08 19:15:58
5	Teju Venkatesh	633	C	2025-05-25 07:32:25
6	chandrakala A S	645	C	2025-05-25 06:56:07
7	Sambit Palit	824	C	2020-10-02 19:02:02
8	Ian Howell	1027	C	2019-11-05 19:09:38
9	Alexander Hassan	1648	C	2024-03-08 20:23:36
10	Bergur Snorrason	1786	C	2019-06-28 16:15:49

#	User	Length	Language	Date
1	Göran Andersson	842	C#	2022-06-07 14:17:06
2	Klas af Geijerstam	915	C#	2017-04-10 23:41:50
3	Mikael Fiala-Lundström	1038	C#	2022-02-17 01:59:16
4	Aabir Bahaida	1082	C#	2017-09-04 11:12:00
5	Samir	1193	C#	2019-01-06 18:32:40
6	RaeMi	1255	C#	2017-09-04 13:10:05
7	Aman Choudhary	1316	C#	2024-05-03 16:19:41
8	Michael Damsgaard	1328	C#	2024-11-05 20:49:40

#	User	Length	Language	Date
1	Frans Meulenbroeks	242	C++	2024-11-11 18:00:41
2	Jason Liu	298	C++	2024-04-15 15:26:23
3	Markus Mathiasen	312	C++	2021-09-08 19:35:22
4	Hyunjun Lee	323	C++	2022-10-28 13:33:11
5	traxex	331	C++	2021-11-30 12:39:22
6	Dmitry Lyubshin	350	C++	2018-05-02 20:34:47
7	人外沙耶	351	C++	2020-11-17 10:42:07
8	Alex Dai	355	C++	2016-08-23 07:19:34
9	Ohieku Eneji Peacemaker	355	C++	2025-04-20 21:22:55
10	Nasis Dereje	356	C++	2022-08-03 16:49:05

#	User	Length	Language	Date
1	Nicholas Lantz	944	Common Lisp	2019-05-03 16:57:15

#	User	Length	Language	Date
1	Mukhlas Rosyadi	412	Go	2023-11-15 07:31:56
2	Ade Hendra	589	Go	2023-11-25 12:07:15
3	Husain Satan	660	Go	2023-11-17 01:10:27
4	Norbert Voelker	738	Go	2021-07-06 21:17:38

#	User	Length	Language	Date
1	Quinn Flavel	344	Haskell	2021-01-07 06:23:11
2	Joshua Coward	392	Haskell	2022-02-03 02:10:04
3	Jan Hrček	437	Haskell	2021-04-01 15:05:40
4	Patrik Lilja	438	Haskell	2016-05-01 19:24:36
5	Hidden user	461	Haskell	2023-01-08 11:24:04
6	Brent Yorgey	531	Haskell	2017-11-25 05:43:41
7	Steinar Simonnes	661	Haskell	2024-03-28 11:54:05
8	Aurélien Pepin	885	Haskell	2019-08-17 21:43:24
9	Hidden user	7376	Haskell	2019-10-27 12:29:57

#	User	Length	Language	Date
1	Pedro Contipelli	470	Java	2017-02-03 18:28:00
2	Jacob Haynie	477	Java	2018-10-26 00:50:57
3	Doug Goodman	496	Java	2018-01-02 20:08:02
4	Kyar Nyo Aye	496	Java	2018-03-22 16:37:12
5	Justin Yu	543	Java	2021-03-20 16:33:34
6	Ivey Jane Botin Bon	548	Java	2023-03-04 13:18:11
7	Ivey Jane Bon	548	Java	2023-03-04 13:27:32
8	Thijs Mangelsdorf	548	Java	2023-11-15 15:26:37
9	Dhorajiya Kenil Shantilal	548	Java	2024-05-03 22:40:24
10	Hidden user	548	Java	2025-03-11 15:12:03

#	User	Length	Language	Date
1	Greg Gorlen	243	JavaScript (Node.js)	2025-09-12 04:40:07

#	User	Length	Language	Date
1	Jimmy Gustafsson	159	JavaScript (SpiderMonkey)	2025-07-22 10:05:37
2	Peter Kedemo	328	JavaScript (SpiderMonkey)	2015-12-30 10:16:16
3	Bjørn Chr. Soltvedt	394	JavaScript (SpiderMonkey)	2016-03-17 06:59:15
4	Christian Pilegaard Cederquist	413	JavaScript (SpiderMonkey)	2023-03-20 10:51:01
5	Johannes Jensen	433	JavaScript (SpiderMonkey)	2016-03-06 00:16:13

#	User	Length	Language	Date
1	Danny Robinson	109	Julia	2023-10-11 01:28:57
2	Timothy Gaede	340	Julia	2025-04-05 20:46:27

#	User	Length	Language	Date
1	Dayan Ruben Gonzalez	434	Kotlin	2020-09-28 16:52:54
2	Adam Rankin	595	Kotlin	2023-05-08 00:14:37
3	Neil Harmon	749	Kotlin	2019-08-29 15:41:56
4	Aniket Kumar	754	Kotlin	2024-05-01 16:25:41
5	Hidden user	993	Kotlin	2020-01-06 15:16:10

#	User	Length	Language	Date
1	Artemis Ngoh	918	OCaml	2024-04-03 19:45:42
2	luna	1104	OCaml	2024-04-04 04:21:01

#	User	Length	Language	Date
1	Ingemar Ragnemalm	518	Pascal	2019-11-23 17:14:59

#	User	Length	Language	Date
1	Andriy Zyevakov	768	Prolog	2018-12-04 20:09:56

#	User	Length	Language	Date
1	Justin Su	177	Python 2	2019-10-07 10:15:08
2	Thomas Feld	193	Python 2	2019-09-23 14:06:32
3	Jesper Öqvist	232	Python 2	2018-10-28 18:16:15
4	Asger Hautop Drewsen	243	Python 2	2015-09-24 10:56:09
5	Conor McCauley	264	Python 2	2019-10-28 05:53:02
6	Andreas Björklund	279	Python 2	2019-12-26 09:07:45
7	Haggai Liu	302	Python 2	2017-03-21 00:03:39
8	Johan Wind	307	Python 2	2015-09-18 18:02:04
9	Kalab Solomon	314	Python 2	2022-08-03 16:14:27
10	AKA_ OPTIMUS	314	Python 2	2022-08-03 16:16:17

#	User	Length	Language	Date
1	Guk Yi Siong	118	Python 3	2024-12-16 06:44:22
2	Tai Tze Kin	141	Python 3	2024-05-09 08:59:20
3	Benjamin Z White	143	Python 3	2023-05-02 00:48:29
4	Ahmed Chamseddine	146	Python 3	2024-09-13 11:07:18
5	Hidden user	157	Python 3	2021-10-27 17:00:26
6	Hrant Hovhannisyan	159	Python 3	2025-07-02 06:48:50
7	David Aldenbro	159	Python 3	2025-08-26 18:16:11
8	Jorge EstradaMartinez	161	Python 3	2025-03-31 01:38:42
9	Kaaden RumanCam	164	Python 3	2022-05-18 04:00:09
10	Lee Isaac	169	Python 3	2023-05-13 03:52:23

#	User	Length	Language	Date
1	Thomas Feld	71	Ruby	2023-05-02 10:02:40

#	User	Length	Language	Date
1	David Rasch	355	Rust	2021-03-25 17:16:09
2	Vincent Lagerros	457	Rust	2025-08-09 00:53:03
3	Bas Dirks	535	Rust	2022-03-11 09:55:15
4	Claes Gustafsson	606	Rust	2019-01-05 00:39:23
5	Arnab De	1311	Rust	2022-10-25 16:53:05
6	Erik Magnusson	4355	Rust	2025-01-18 22:16:06

Solution running time distribution