Problem A
Rock Band — Problem Statistics

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Submissions	1563
Accepted submissions	557
Submission ratio	35.64%
Authors	480
Full solves [?]	407
Full solve Ratio	84.79%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.06 s	C	2020-03-03 10:42:04
2	Mirel Cosulschi	0.18 s	C	2024-01-21 08:21:19
3	Ivan Petrov	0.20 s	C	2017-11-06 09:54:47

#	User	Runtime	Language	Date
1	Gert Jan Sterrenburg	0.65 s	C#	2017-08-31 20:03:08
2	Tjibbe van der Veen	0.69 s	C#	2017-08-31 19:23:34
3	Erik van Holland	0.76 s	C#	2017-08-31 19:12:41
4	Guido Passage	0.79 s	C#	2017-08-31 19:03:28
5	Rogier Emmen	1.39 s	C#	2017-09-03 16:08:47
6	Yuri van Berkum	1.79 s	C#	2017-08-31 19:29:56
7	Andrzej Krajniak	1.80 s	C#	2017-09-06 20:00:15

#	User	Runtime	Language	Date
1	Frank Endriss	0.06 s	C++	2019-12-31 23:48:01
2	Agis Daniels	0.07 s	C++	2019-11-30 18:03:20
3	Pavel Verigo	0.10 s	C++	2019-10-16 20:42:35
4	Joel Au	0.10 s	C++	2020-05-13 15:44:37
5	Ragnar Groot Koerkamp	0.11 s	C++	2016-11-06 02:25:50
6	Hieronymus de Jong	0.11 s	C++	2017-10-30 22:55:45
7	Hidden user	0.11 s	C++	2019-10-15 08:49:13
8	Nicholas Novakovic	0.11 s	C++	2020-04-16 10:28:43
9	Jalvin Chan Jia Xiang	0.11 s	C++	2020-04-27 12:56:17
10	Hidden user	0.11 s	C++	2020-10-26 14:46:08

#	User	Runtime	Language	Date
1	Ryan Chew	0.38 s	Haskell	2019-01-23 06:01:53

#	User	Runtime	Language	Date
1	Crystal Sharpe	0.26 s	Java	2020-08-07 06:55:24
2	Bjørn Dons	0.29 s	Java	2019-09-17 20:05:28
3	Ruslan	0.67 s	Java	2023-01-14 10:06:49
4	Dev Chheda	0.71 s	Java	2021-03-20 18:23:52
5	Liam Keliher	0.72 s	Java	2024-06-26 00:47:10
6	Shreyas Jamadagni	0.79 s	Java	2024-10-13 09:07:53
7	Brent Yorgey	0.81 s	Java	2019-12-31 00:44:02
8	Andrew Polizzotto	0.87 s	Java	2020-02-29 05:42:41
9	Kevin Lim Yong Shen	0.88 s	Java	2020-01-11 16:44:08
10	Mack Wong Yoong Yee	0.89 s	Java	2024-06-19 18:20:37

#	User	Runtime	Language	Date
1	Jeremiah Ang	1.83 s	JavaScript (Node.js)	2020-09-17 11:56:55

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.40 s	JavaScript (SpiderMonkey)	2023-10-07 19:14:38
2	Bjørn Chr. Soltvedt	0.95 s	JavaScript (SpiderMonkey)	2017-02-12 00:53:09

#	User	Runtime	Language	Date
1	Hidden user	0.77 s	Kotlin	2020-04-18 16:07:54
2	Adam Rankin	1.80 s	Kotlin	2023-10-29 17:12:21

#	User	Runtime	Language	Date
1	Michael Huang	0.30 s	Python 2	2018-05-13 03:20:10
2	Haochen Chen	0.31 s	Python 2	2016-11-05 21:12:51
3	Andreas Björklund	0.32 s	Python 2	2020-08-22 10:49:57
4	Lars Åström	0.35 s	Python 2	2019-04-26 18:08:46
5	Christofer Ohlsson	0.46 s	Python 2	2016-11-12 08:42:36

#	User	Runtime	Language	Date
1	Maj Stenmark	0.28 s	Python 3	2022-01-09 13:32:28
2	Hidden user	0.28 s	Python 3	2023-08-24 23:01:35
3	Petr	0.29 s	Python 3	2025-05-21 06:18:45
4	Floris Cnossen	0.34 s	Python 3	2020-05-20 18:22:11
5	Paul Yang	0.34 s	Python 3	2024-09-30 23:21:54
6	Arup Ratan Guha	0.35 s	Python 3	2024-12-14 18:04:24
7	Arnav Upadhyay	0.35 s	Python 3	2025-01-06 21:37:52
8	Alessandro Della Flora	0.36 s	Python 3	2024-04-20 12:32:43
9	Tryan Aditya	0.36 s	Python 3	2025-02-06 05:09:29
10	Pizza Hut	0.36 s	Python 3	2025-02-13 15:41:46

#	User	Runtime	Language	Date
1	Hidden user	0.65 s	Ruby	2019-03-21 15:41:42

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.03 s	Rust	2025-08-10 02:20:18
2	Artur Khuziakhmetov	0.12 s	Rust	2022-07-27 10:21:59
3	Pahlevi Fikri Auliya	0.20 s	Rust	2020-10-25 01:01:45
4	Egor Kulikov	0.21 s	Rust	2025-10-14 15:37:28

#	User	Length	Language	Date
1	Ivan Petrov	851	C	2017-11-06 09:54:47
2	Mirel Cosulschi	1210	C	2024-01-21 08:21:19
3	Bergur Snorrason	1951	C	2020-03-03 10:42:04

#	User	Length	Language	Date
1	Yuri van Berkum	1352	C#	2017-08-31 19:29:56
2	Rogier Emmen	1672	C#	2017-09-03 16:10:11
3	Tjibbe van der Veen	1676	C#	2017-08-31 19:23:34
4	Guido Passage	1768	C#	2017-08-31 19:03:28
5	Gert Jan Sterrenburg	1874	C#	2017-08-31 20:03:08
6	Erik van Holland	2056	C#	2017-08-31 19:12:41
7	Andrzej Krajniak	7404	C#	2017-09-06 20:00:15

#	User	Length	Language	Date
1	Markus Mathiasen	426	C++	2021-08-19 11:32:08
2	Fajar Yuda Apriliano	481	C++	2019-01-18 13:34:30
3	Zane Yu	503	C++	2019-01-21 14:59:55
4	Artemis Ngoh	545	C++	2022-09-22 13:09:00
5	William Gan	564	C++	2017-11-06 07:07:42
6	Josenildo Silva	565	C++	2017-03-20 04:11:14
7	Ethan Guo	580	C++	2018-11-28 22:03:50
8	Hidden user	587	C++	2020-03-26 08:41:18
9	Li Jiayu	591	C++	2022-01-16 07:39:05
10	Caeden Whitaker	601	C++	2021-07-07 19:50:56

#	User	Length	Language	Date
1	Ryan Chew	3542	Haskell	2019-01-23 06:01:53

#	User	Length	Language	Date
1	Natalie Longtin	580	Java	2019-05-30 04:11:48
2	Huang Qiming	719	Java	2021-07-12 12:02:54
3	Jeroen Bransen	911	Java	2017-09-12 14:47:41
4	Marc Dominic San Pedro	944	Java	2019-10-09 04:15:14
5	Kevin Pratt	1005	Java	2016-11-05 20:04:54
6	Shreyas Jamadagni	1101	Java	2024-10-13 09:07:53
7	Daniel West	1134	Java	2018-05-04 21:13:29
8	Doug Goodman	1186	Java	2018-04-21 19:05:35
9	Martha Kosa	1191	Java	2024-09-19 23:09:59
10	Conor Pettice-Yarnall	1244	Java	2023-10-28 19:31:01

#	User	Length	Language	Date
1	Jeremiah Ang	936	JavaScript (Node.js)	2020-09-17 11:56:55

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	388	JavaScript (SpiderMonkey)	2023-10-07 19:14:38
2	Bjørn Chr. Soltvedt	563	JavaScript (SpiderMonkey)	2017-02-12 00:53:09

#	User	Length	Language	Date
1	Adam Rankin	1056	Kotlin	2023-10-29 17:12:21
2	Hidden user	1209	Kotlin	2020-04-18 16:07:54

#	User	Length	Language	Date
1	Haochen Chen	380	Python 2	2016-11-05 21:12:51
2	Andreas Björklund	453	Python 2	2020-08-22 10:49:57
3	Christofer Ohlsson	471	Python 2	2016-11-12 08:42:36
4	Michael Huang	506	Python 2	2018-05-13 03:20:10
5	Lars Åström	756	Python 2	2019-04-26 18:08:46

#	User	Length	Language	Date
1	Thomas Feld	116	Python 3	2023-06-22 11:00:20
2	Benjamin Z White	147	Python 3	2023-06-06 16:43:15
3	Clement Oh	245	Python 3	2023-12-29 10:11:53
4	Надежда Кононюк	276	Python 3	2024-04-19 22:32:52
5	Alexander Bilde Pedersen	280	Python 3	2025-03-21 18:25:32
6	Hidden user	282	Python 3	2022-09-20 21:23:34
7	Noam Cohen	284	Python 3	2021-01-21 19:09:09
8	Sayan Gupta	286	Python 3	2024-07-18 21:09:44
9	Brandon Young	287	Python 3	2024-02-04 22:31:34
10	Brandon Tang	299	Python 3	2023-06-03 17:43:38

#	User	Length	Language	Date
1	Hidden user	247	Ruby	2019-03-21 15:41:42

#	User	Length	Language	Date
1	Artur Khuziakhmetov	1306	Rust	2022-07-27 10:21:59
2	Pahlevi Fikri Auliya	2461	Rust	2020-10-25 01:01:45
3	Vincent Lagerros	11278	Rust	2024-08-02 13:24:39
4	Egor Kulikov	24849	Rust	2025-10-14 15:37:28

Solution running time distribution