Problem A
Factstone Benchmark — Problem Statistics

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Submissions	2220
Accepted submissions	895
Submission ratio	40.32%
Authors	800
Full solves [?]	647
Full solve Ratio	80.88%

#	User	Runtime	Language	Date
1	Carl-Fredrik Sundlöf	0.00 s	C	2009-12-03 17:53:28
2	Johannes Svensson	0.00 s	C	2009-12-06 13:12:06
3	David Björklund	0.00 s	C	2009-12-08 16:00:22
4	Thibault Raffaillac	0.00 s	C	2011-12-19 18:23:15
5	David Flemström	0.00 s	C	2014-05-14 00:43:27
6	vance	0.00 s	C	2020-04-02 08:41:19
7	Andrew Parker	0.00 s	C	2020-07-07 23:07:12
8	Emil Wihlander	0.00 s	C	2020-11-29 00:02:51
9	Shawn Lee Kai Sheng	0.00 s	C	2021-04-28 14:03:02
10	Chuan-Chen Chu	0.01 s	C	2020-07-07 20:33:25

#	User	Runtime	Language	Date
1	masosz	0.03 s	C#	2015-03-31 21:29:14
2	Abdellatif Elyoussefy	0.03 s	C#	2020-12-29 11:53:28
3	Hamdanil Rasyid	0.05 s	C#	2024-12-15 02:23:40
4	Victor Hultén Mattsson	0.11 s	C#	2021-06-15 21:13:31
5	Hidden user	0.13 s	C#	2021-11-13 01:52:14
6	Hidden user	0.14 s	C#	2020-07-06 21:51:58

#	User	Runtime	Language	Date
1	Hidden user	0.07 s	Common Lisp	2019-07-31 00:40:42

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	D	2025-08-15 07:07:24

#	User	Runtime	Language	Date
1	Paul Boddington	0.16 s	Go	2016-05-18 04:09:14

#	User	Runtime	Language	Date
1	Esther Chong	0.01 s	Haskell	2018-08-16 07:23:37
2	Tim Put	0.01 s	Haskell	2021-04-14 09:10:13
3	Zach Tschetter	0.01 s	Haskell	2021-09-28 01:06:26
4	Hidden user	0.02 s	Haskell	2022-08-23 11:45:36
5	Niklas Rosén	0.03 s	Haskell	2014-05-18 01:26:04
6	Brent Yorgey	0.05 s	Haskell	2018-12-17 21:50:27

#	User	Runtime	Language	Date
1	Fredrik Atmer	0.05 s	Java	2009-11-20 12:21:43
2	Staffan Rydström	0.05 s	Java	2011-12-21 01:54:09
3	Martijn Muijsers	0.05 s	Java	2016-11-15 13:37:26
4	Joshua Chin	0.05 s	Java	2025-06-14 13:10:50
5	Carl-Fredrik Sundlöf	0.06 s	Java	2009-12-03 17:27:48
6	Hidden user	0.06 s	Java	2009-12-09 08:36:56
7	Marcus Öman	0.06 s	Java	2009-12-16 20:59:35
8	Erik Odenman	0.06 s	Java	2011-05-20 21:35:39
9	Kai Widell Niigata	0.06 s	Java	2014-05-14 15:18:24
10	Jens Ståhl	0.06 s	Java	2014-05-15 11:24:11

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-05-21 15:04:41
2	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-07-16 16:51:08
3	michael r lederle	0.08 s	JavaScript (SpiderMonkey)	2022-04-20 08:05:01

#	User	Runtime	Language	Date
1	Timothy Gaede	0.63 s	Julia	2024-08-21 16:52:30

#	User	Runtime	Language	Date
1	Hidden user	0.15 s	Kotlin	2019-12-18 10:55:35
2	Adam Rankin	0.22 s	Kotlin	2023-09-17 00:10:06
3	Adam Koprowski	0.25 s	Kotlin	2022-01-03 22:55:15
4	Phường Lên	0.28 s	Kotlin	2020-01-23 04:36:04

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.03 s	Prolog	2025-12-02 09:15:51

#	User	Runtime	Language	Date
1	Johannes Agestam	0.02 s	Python 2	2015-06-23 17:35:25
2	Michael Pfeifer	0.03 s	Python 2	2017-06-12 16:45:43
3	Agis Daniels	0.03 s	Python 2	2019-12-01 15:31:52
4	Ben Huck	0.03 s	Python 2	2020-09-24 22:02:56
5	Yanmarshus Bachtiar	0.03 s	Python 2	2020-10-02 09:50:19
6	Achraf Faytout	0.03 s	Python 2	2021-10-09 02:33:23
7	William Fiset	0.04 s	Python 2	2016-05-10 02:18:17
8	Dmitry Lyubshin	0.04 s	Python 2	2018-05-21 05:31:13
9	Andreas Björklund	0.04 s	Python 2	2021-11-08 19:12:03
10	Anders Westling	0.05 s	Python 2	2012-03-02 15:37:24

#	User	Runtime	Language	Date
1	Johannes Agestam	0.02 s	Python 3	2015-06-23 17:31:36
2	Isaac Lee	0.02 s	Python 3	2016-05-10 02:12:49
3	Nathan Collins	0.02 s	Python 3	2016-08-07 03:39:15
4	Arnav Sastry	0.02 s	Python 3	2017-01-10 22:29:29
5	Gal Zakrajsek	0.02 s	Python 3	2018-01-23 13:40:29
6	Lino Toran Jenner	0.02 s	Python 3	2018-04-06 22:19:01
7	Kasra Ghodsi	0.02 s	Python 3	2018-09-10 02:10:24
8	Vincent Tandya	0.02 s	Python 3	2018-12-30 02:53:55
9	Aaron Dunigan AtLee	0.02 s	Python 3	2019-01-10 01:47:44
10	Henry Jayakusuma	0.02 s	Python 3	2019-04-20 19:11:29

#	User	Runtime	Language	Date
1	Thomas Feld	0.06 s	Ruby	2023-04-18 12:15:05

#	User	Runtime	Language	Date
1	Aaron Lengyel	0.00 s	Rust	2021-11-21 06:09:08
2	Bas Dirks	0.00 s	Rust	2022-02-17 20:57:29
3	Vincent Lagerros	0.00 s	Rust	2024-06-09 16:23:37
4	Hidden user	0.01 s	Rust	2021-10-31 05:44:58
5	Eric Pinter	0.03 s	Rust	2021-11-13 04:05:52

#	User	Length	Language	Date
1	Shawn Lee Kai Sheng	238	C	2021-05-01 06:03:10
2	Eyleifur Bjarkason	245	C	2023-02-21 00:16:51
3	Thibault Raffaillac	261	C	2017-10-25 18:13:46
4	Johannes Svensson	271	C	2009-12-06 13:12:06
5	ravi	284	C	2020-12-30 23:55:56
6	Carl-Fredrik Sundlöf	307	C	2009-12-03 17:53:28
7	David Björklund	315	C	2009-12-08 16:00:22
8	James Christian Ruiz	338	C	2023-09-03 15:26:27
9	Marcus Larsson	364	C	2013-05-12 20:52:02
10	Theo Szymkowiak	368	C	2016-11-13 17:22:09

#	User	Length	Language	Date
1	Hidden user	733	C#	2020-07-06 21:51:58
2	Victor Hultén Mattsson	1102	C#	2021-06-15 21:13:31
3	Abdellatif Elyoussefy	1275	C#	2020-12-29 11:53:28
4	Hidden user	1810	C#	2021-11-13 01:52:14
5	Hamdanil Rasyid	1921	C#	2024-12-15 02:23:40
6	masosz	2328	C#	2015-03-31 21:29:14

#	User	Length	Language	Date
1	David Wärn	232	C++	2015-06-01 13:33:35
2	Ollanta Cuba Gyllensten	246	C++	2009-12-04 10:33:01
3	Frederick Pek	247	C++	2021-04-28 10:19:08
4	Henrik Sandström	262	C++	2009-12-01 17:24:17
5	Christian Yongwhan Lim	266	C++	2023-06-14 17:26:58
6	Stefan Varnev	268	C++	2020-12-05 20:43:24
7	Zane Yu	271	C++	2019-01-11 14:51:06
8	Hidden user	272	C++	2024-03-26 18:59:31
9	Florian Cliquet	272	C++	2024-10-22 12:10:49
10	Yeung Man Tsung	275	C++	2022-12-01 08:47:16

#	User	Length	Language	Date
1	Hidden user	331	Common Lisp	2019-07-31 00:40:42

#	User	Length	Language	Date
1	Hidden user	477	D	2025-08-15 07:07:24

#	User	Length	Language	Date
1	Paul Boddington	487	Go	2016-05-18 04:09:14

#	User	Length	Language	Date
1	Niklas Rosén	311	Haskell	2014-05-18 00:54:31
2	Esther Chong	447	Haskell	2018-08-16 07:23:37
3	Zach Tschetter	541	Haskell	2021-09-28 01:06:26
4	Brent Yorgey	989	Haskell	2018-12-17 21:50:27
5	Hidden user	1072	Haskell	2022-08-23 11:56:55
6	Tim Put	1113	Haskell	2021-04-14 09:10:13

#	User	Length	Language	Date
1	Staffan Rydström	403	Java	2011-12-21 01:02:29
2	Xun Su	403	Java	2016-11-05 00:25:39
3	Ruth Silcoff	479	Java	2020-12-05 23:21:16
4	Kelvin Tagoe	481	Java	2018-04-13 17:49:24
5	Doug Goodman	506	Java	2017-11-18 18:40:28
6	zhiqiao Yu	525	Java	2020-12-05 17:00:46
7	Saâd Benatti	525	Java	2020-12-05 21:52:20
8	Victor Jukic Prevost	531	Java	2016-11-05 00:23:00
9	Jan Štola	533	Java	2015-05-26 16:45:24
10	Erik Odenman	540	Java	2011-05-20 21:35:39

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	132	JavaScript (SpiderMonkey)	2023-07-16 16:52:21
2	Bjørn Chr. Soltvedt	236	JavaScript (SpiderMonkey)	2016-05-21 15:04:41
3	michael r lederle	341	JavaScript (SpiderMonkey)	2022-04-20 08:05:01

#	User	Length	Language	Date
1	Timothy Gaede	1201	Julia	2024-08-21 16:52:30

#	User	Length	Language	Date
1	Phường Lên	308	Kotlin	2020-01-23 04:36:04
2	Adam Koprowski	550	Kotlin	2022-01-03 22:55:15
3	Adam Rankin	827	Kotlin	2023-09-17 00:10:06
4	Hidden user	962	Kotlin	2019-12-18 10:55:35

#	User	Length	Language	Date
1	Andriy Zyevakov	5902	Prolog	2025-12-02 09:15:51

#	User	Length	Language	Date
1	Guan Yang Ze	215	Python 2	2019-09-24 20:08:03
2	Andreas Björklund	233	Python 2	2021-11-08 19:12:03
3	Izzati Al Vandiar	258	Python 2	2015-11-09 03:17:12
4	Dmitry Lyubshin	269	Python 2	2018-05-21 05:31:13
5	Govind Venugopalan	271	Python 2	2017-12-26 03:06:26
6	Johan Lyts	274	Python 2	2019-08-01 21:29:26
7	Anders Westling	279	Python 2	2012-03-02 15:37:24
8	Paulo Bu	285	Python 2	2015-04-07 08:47:41
9	Johannes Agestam	293	Python 2	2015-06-23 17:35:25
10	Quan Huynh	302	Python 2	2015-09-21 10:36:23

#	User	Length	Language	Date
1	Teikn Smith	131	Python 3	2023-12-16 00:36:48
2	Peter Stauder	135	Python 3	2023-04-14 19:37:12
3	Bergur Snorrason	158	Python 3	2023-02-21 13:59:19
4	Clement Oh	158	Python 3	2023-12-09 11:16:10
5	Artur Khuziakhmetov	181	Python 3	2025-01-25 09:56:58
6	Torstein Barvik Molstad	197	Python 3	2025-11-26 19:39:03
7	Nicholas Russell Saerang	200	Python 3	2023-02-20 19:57:25
8	Gal Zakrajsek	206	Python 3	2018-02-05 17:27:29
9	Ainun Najib	208	Python 3	2020-08-29 11:40:56
10	Shawn Lee Kai Sheng	210	Python 3	2021-04-28 11:34:39

#	User	Length	Language	Date
1	Thomas Feld	84	Ruby	2025-08-26 13:09:41

#	User	Length	Language	Date
1	Bas Dirks	757	Rust	2022-02-17 20:57:29
2	Hidden user	861	Rust	2021-10-31 05:44:58
3	Eric Pinter	1206	Rust	2021-11-13 04:01:38
4	Vincent Lagerros	4399	Rust	2024-06-09 16:22:40
5	Aaron Lengyel	4476	Rust	2021-11-21 06:09:08

Solution running time distribution