Problem I
Keyboards in Concert — Problem Statistics

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Submissions	3121
Accepted submissions	1077
Submission ratio	34.51%
Authors	882
Full solves [?]	759
Full solve Ratio	86.05%

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	C	2019-01-04 10:50:06
2	Ivan Petrov	0.02 s	C	2019-11-04 15:41:03
3	Samuel Deutsch	0.02 s	C	2020-09-23 08:20:39
4	Gabriel Totev	0.02 s	C	2020-10-19 06:17:22
5	Komatsuna	0.02 s	C	2022-07-11 16:49:44
6	Hidden user	0.12 s	C	2023-11-19 12:02:52
7	taichi	0.15 s	C	2023-05-15 02:56:46

#	User	Runtime	Language	Date
1	Sébastien Paumier	0.14 s	C#	2018-11-10 12:43:00

#	User	Runtime	Language	Date
1	Daryll Ko	0.00 s	C++	2022-07-04 11:12:43
2	Yu-Chen Chan	0.00 s	C++	2024-04-12 02:41:44
3	Kenneth Langedal	0.01 s	C++	2019-11-25 17:22:57
4	Jim Zheng	0.01 s	C++	2020-02-04 16:39:40
5	Muhamad Affan	0.01 s	C++	2020-07-14 03:47:24
6	Duarte Nóbrega	0.01 s	C++	2020-07-19 19:56:16
7	Hidden user	0.01 s	C++	2022-02-12 20:22:16
8	Alexander Kravberg	0.01 s	C++	2024-11-30 02:15:17
9	Sven Rönnbäck	0.01 s	C++	2024-12-25 19:40:18
10	Dmitry Lyubshin	0.02 s	C++	2018-11-12 05:21:10

#	User	Runtime	Language	Date
1	Hugo Sansaqua	0.03 s	Common Lisp	2020-05-01 13:51:00

#	User	Runtime	Language	Date
1	Jakob Israelsen	0.29 s	F#	2020-02-07 17:58:14

#	User	Runtime	Language	Date
1	Norbert Voelker	0.16 s	Go	2021-12-04 21:48:43
2	Ben Reed	0.34 s	Go	2022-06-01 23:26:13

#	User	Runtime	Language	Date
1	Hidden user	0.16 s	Haskell	2022-09-03 16:46:33

#	User	Runtime	Language	Date
1	Leo Pan	0.09 s	Java	2022-10-20 23:58:32
2	Payas	0.09 s	Java	2023-02-09 06:46:56
3	Jimmy Dinh	0.09 s	Java	2023-12-09 10:41:28
4	Ayaka Nishihori	0.10 s	Java	2020-09-25 02:08:09
5	Trung Dang	0.10 s	Java	2021-09-24 06:05:31
6	Hidden user	0.10 s	Java	2021-09-24 06:06:35
7	Derek Thomson	0.10 s	Java	2022-02-10 04:25:04
8	Ahmad Barhamje	0.10 s	Java	2023-08-04 01:21:15
9	Bjørn Dons	0.11 s	Java	2018-12-28 04:44:12
10	Sparsh Sanchorawala	0.11 s	Java	2022-11-12 00:35:28

#	User	Runtime	Language	Date
1	Christian Cederquist	0.09 s	JavaScript (SpiderMonkey)	2023-06-04 09:30:00
2	Bjørn Chr. Soltvedt	0.40 s	JavaScript (SpiderMonkey)	2018-12-18 01:45:44

#	User	Runtime	Language	Date
1	Nicholas Johnson	0.27 s	Kotlin	2022-02-05 19:40:53
2	Jacob Huebner	0.40 s	Kotlin	2020-04-27 11:39:23

#	User	Runtime	Language	Date
1	Hidden user	0.07 s	Python 2	2018-12-08 15:47:10
2	Hermon Mulat	0.08 s	Python 2	2018-12-27 23:51:33
3	Skyler Kiefer	0.08 s	Python 2	2020-02-10 02:52:31
4	Andreas Björklund	0.09 s	Python 2	2018-12-24 06:23:47
5	Øyvind Haarberg	0.12 s	Python 2	2018-11-11 19:40:34
6	Lars Åström	0.13 s	Python 2	2019-09-18 17:31:40
7	Jaden Lee	0.13 s	Python 2	2020-09-19 22:06:19
8	Markus Fanebust Dregi	0.18 s	Python 2	2018-11-10 12:18:44
9	Arne Tobias Malkenes Ødegaard	0.24 s	Python 2	2019-10-29 18:06:10
10	Oskar Haarklou Veileborg	0.30 s	Python 2	2019-07-26 14:39:50

#	User	Runtime	Language	Date
1	Aaron Lengyel	0.08 s	Python 3	2024-10-01 03:46:38
2	Nathan Vaters	0.08 s	Python 3	2025-03-04 22:19:25
3	Kyle Gusdorf	0.09 s	Python 3	2020-10-20 05:02:51
4	Takumi ITO	0.09 s	Python 3	2023-05-11 09:52:09
5	August Danell Håkansson	0.09 s	Python 3	2023-06-15 12:20:14
6	Mason Barnhill	0.09 s	Python 3	2023-12-19 18:17:56
7	Ishrat Naba	0.09 s	Python 3	2025-03-05 01:00:55
8	Katie Chen	0.09 s	Python 3	2025-03-09 21:44:58
9	René Castañeda	0.09 s	Python 3	2025-05-31 22:54:07
10	José Alfredo Rodríguez Rodríguez	0.09 s	Python 3	2025-06-01 00:41:41

#	User	Runtime	Language	Date
1	Thomas Feld	0.14 s	Ruby	2023-10-09 12:44:41
2	Bryan Terce	0.19 s	Ruby	2020-10-20 00:39:38
3	Yusuke Ichiki	0.19 s	Ruby	2022-05-12 19:12:39

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.00 s	Rust	2025-05-21 20:19:38
2	Hidden user	0.01 s	Rust	2019-11-28 14:32:06
3	Haggi Haggi	0.01 s	Rust	2019-12-01 19:33:39
4	Ryosuke Takahashi	0.01 s	Rust	2023-05-09 02:42:08
5	Schnee	0.15 s	Rust	2023-05-15 12:40:24
6	Iwancof	0.34 s	Rust	2023-05-09 03:29:46
7	藤原潮人	0.56 s	Rust	2023-05-16 07:14:18
8	Trygve Eide Igesund	0.78 s	Rust	2023-08-27 13:56:12

#	User	Length	Language	Date
1	Gabriel Totev	910	C	2020-10-19 06:17:22
2	Samuel Deutsch	1052	C	2020-09-23 08:20:39
3	Hidden user	1084	C	2023-11-19 12:02:52
4	Ivan Petrov	1358	C	2019-11-04 15:41:03
5	Hidden user	1359	C	2019-01-04 11:02:03
6	taichi	1503	C	2023-05-15 02:56:46
7	Komatsuna	1702	C	2022-07-11 16:49:44

#	User	Length	Language	Date
1	Sébastien Paumier	1632	C#	2018-11-10 12:43:00

#	User	Length	Language	Date
1	Anvit Sinha	349	C++	2024-04-12 00:44:44
2	David Sturgill	389	C++	2023-01-14 12:32:46
3	Armen Andreasyan	491	C++	2019-01-05 12:25:38
4	William Gan	493	C++	2018-12-04 17:15:45
5	James Tan	555	C++	2024-04-08 22:00:18
6	Leo Lee	564	C++	2024-04-02 20:53:18
7	Takuto Susuki	583	C++	2023-05-16 15:02:15
8	Emiliano Jossie	616	C++	2021-11-01 07:33:02
9	KEYANG LI	629	C++	2022-02-05 22:27:48
10	David Zheng	643	C++	2018-12-08 02:54:41

#	User	Length	Language	Date
1	Hugo Sansaqua	5861	Common Lisp	2020-05-01 13:51:00

#	User	Length	Language	Date
1	Jakob Israelsen	898	F#	2020-02-07 17:58:14

#	User	Length	Language	Date
1	Ben Reed	844	Go	2022-06-01 23:26:13
2	Norbert Voelker	1417	Go	2021-12-04 21:48:43

#	User	Length	Language	Date
1	Hidden user	1603	Haskell	2022-09-03 16:46:33

#	User	Length	Language	Date
1	Saisuvan Chikyala	1161	Java	2020-02-06 01:04:55
2	David Joy	1216	Java	2020-01-30 03:30:55
3	Chirag Asrani	1216	Java	2025-03-11 00:18:16
4	chirurg	1226	Java	2025-03-05 06:54:55
5	Hrushik Chiluvuri	1240	Java	2022-01-30 20:41:16
6	Ryan Chang	1246	Java	2021-09-24 03:39:27
7	Abhinav Dusi	1322	Java	2021-09-19 02:07:37
8	Russell Zhu	1448	Java	2022-01-30 20:39:21
9	Peter Jin	1510	Java	2022-10-12 14:56:36
10	Suhas T. Nagar	1511	Java	2022-02-07 18:10:28

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	450	JavaScript (SpiderMonkey)	2018-12-18 01:45:44
2	Christian Cederquist	791	JavaScript (SpiderMonkey)	2023-06-04 09:30:00

#	User	Length	Language	Date
1	Jacob Huebner	1228	Kotlin	2020-04-27 11:39:23
2	Nicholas Johnson	2644	Kotlin	2022-02-05 19:40:53

#	User	Length	Language	Date
1	Andreas Björklund	455	Python 2	2018-12-24 06:23:47
2	Oskar Haarklou Veileborg	481	Python 2	2019-07-26 14:39:50
3	Hermon Mulat	532	Python 2	2018-12-27 23:51:33
4	Arne Tobias Malkenes Ødegaard	591	Python 2	2019-10-29 18:06:10
5	Skyler Kiefer	600	Python 2	2020-02-10 02:52:31
6	Lars Åström	607	Python 2	2019-09-18 17:31:40
7	Øyvind Haarberg	643	Python 2	2018-11-11 19:40:34
8	Markus Fanebust Dregi	661	Python 2	2018-11-10 12:18:44
9	Hidden user	695	Python 2	2018-12-08 15:47:10
10	Jaden Lee	1102	Python 2	2020-09-19 22:06:19

#	User	Length	Language	Date
1	Jayden Pahukula	230	Python 3	2023-10-05 22:00:30
2	Thibault Raffaillac	243	Python 3	2023-03-17 15:28:22
3	Peter Stauder	272	Python 3	2023-03-11 20:10:35
4	Yong Mao	294	Python 3	2023-10-27 04:08:38
5	frodo821	295	Python 3	2022-05-17 08:38:41
6	Bhavesh Pareek	316	Python 3	2022-10-19 23:23:12
7	Casper Rysgaard	317	Python 3	2021-02-02 17:08:02
8	Saravana Polisetti	322	Python 3	2022-10-20 22:44:23
9	Lawry Sorenson	339	Python 3	2023-03-10 03:32:39
10	Hidden user	344	Python 3	2024-03-03 19:37:12

#	User	Length	Language	Date
1	Thomas Feld	110	Ruby	2023-10-09 12:44:41
2	Bryan Terce	511	Ruby	2020-10-20 00:39:38
3	Yusuke Ichiki	524	Ruby	2022-05-12 19:12:39

#	User	Length	Language	Date
1	藤原潮人	1546	Rust	2023-05-16 07:14:18
2	Schnee	1656	Rust	2023-05-15 12:40:24
3	Trygve Eide Igesund	1919	Rust	2023-08-27 13:56:12
4	Hidden user	2047	Rust	2019-11-25 01:19:41
5	Haggi Haggi	2800	Rust	2019-11-30 14:00:31
6	Ryosuke Takahashi	4025	Rust	2023-05-09 02:42:08
7	Iwancof	20384	Rust	2023-05-14 00:40:42
8	Vincent Lagerros	62684	Rust	2025-05-21 20:19:38

Solution running time distribution