Problem A
Bracket Matching — Problem Statistics

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Submissions	6639
Accepted submissions	2372
Submission ratio	35.73%
Authors	2011
Full solves [?]	1854
Full solve Ratio	92.19%

#	User	Runtime	Language	Date
1	Danny Robinson	0.02 s	Bash	2023-09-26 06:56:51

#	User	Runtime	Language	Date
1	Esty Crow	0.04 s	C#	2023-06-17 04:45:01
2	Anthony Ye	0.04 s	C#	2023-06-18 18:39:04
3	Gregory Sinclair	0.04 s	C#	2023-11-11 05:01:56
4	Chen Lili	0.04 s	C#	2023-12-02 20:53:44
5	traxex	0.04 s	C#	2024-05-27 15:24:02
6	Jack Cannell	0.05 s	C#	2023-12-02 20:56:00
7	William Skou Heidemann	0.05 s	C#	2024-02-23 17:10:37
8	Roberto Rodriguez Giorgetti	0.05 s	C#	2024-10-02 19:12:54
9	Umar Rasyid	0.05 s	C#	2025-02-18 01:59:14
10	Andriy Zyevakov	0.05 s	C#	2025-11-01 13:21:02

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.04 s	F#	2023-04-09 09:33:51
2	Andreas Andrä-Fredsted	0.07 s	F#	2024-02-23 18:28:17
3	Jesper Bengtson	0.09 s	F#	2026-02-13 17:02:22

#	User	Runtime	Language	Date
1	Norbert Voelker	0.02 s	Go	2023-03-12 11:40:48
2	Chris Vilches	0.12 s	Go	2024-08-16 16:08:53
3	Jimmy Nejtron	0.23 s	Go	2023-03-14 11:47:11

#	User	Runtime	Language	Date
1	Charley Sheaffer	0.01 s	Haskell	2023-11-02 16:26:50
2	Jan Hrček	0.01 s	Haskell	2024-12-25 17:26:18
3	Hidden user	0.02 s	Haskell	2023-03-12 09:20:45
4	Brent Yorgey	0.02 s	Haskell	2023-03-12 19:21:07
5	Ng Tek In	0.02 s	Haskell	2023-05-18 18:57:45
6	Hidden user	0.02 s	Haskell	2023-10-08 21:34:42
7	Steinar Simonnes	0.02 s	Haskell	2024-02-05 11:21:56
8	Adam Yaser Sweilem	0.02 s	Haskell	2025-02-10 14:52:58

#	User	Runtime	Language	Date
1	Guangyi Zhou	0.05 s	Java	2025-02-10 11:32:26
2	Tan Yi Long	0.05 s	Java	2025-08-16 19:07:13
3	Sven Rönnbäck	0.06 s	Java	2023-03-22 16:55:27
4	Einar Darri Sveinbjörnsson	0.06 s	Java	2024-08-25 01:47:05
5	Tomas Vemola	0.06 s	Java	2025-02-12 10:35:22
6	Choo Tian Long	0.06 s	Java	2025-10-02 17:28:52
7	Bastian Smith-Sivertsen	0.06 s	Java	2026-02-10 19:56:55
8	Kim Seoyoon	0.06 s	Java	2026-02-20 06:21:14
9	Hjalte Erlang Treebak	0.07 s	Java	2025-02-06 14:34:49
10	Sofie Meta Schroeder	0.07 s	Java	2025-02-11 07:56:14

#	User	Runtime	Language	Date
1	Emil Østergaard	0.05 s	JavaScript (Node.js)	2024-02-23 16:47:53

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.03 s	JavaScript (SpiderMonkey)	2023-03-12 02:34:55
2	Christian Pilegaard Cederquist	0.03 s	JavaScript (SpiderMonkey)	2023-03-12 07:43:46
3	Zach Tschetter	0.03 s	JavaScript (SpiderMonkey)	2023-05-19 02:30:21
4	Jimmy Gustafsson	0.03 s	JavaScript (SpiderMonkey)	2024-08-03 23:57:17

#	User	Runtime	Language	Date
1	Martijn Muijsers	0.22 s	Kotlin	2024-06-02 20:44:11
2	Troy Warmboe	0.26 s	Kotlin	2023-04-11 04:32:07
3	Adam Rankin	0.27 s	Kotlin	2023-04-22 19:30:34
4	Emil Wihlander	0.27 s	Kotlin	2023-07-27 13:21:06
5	Ola Sundell	0.32 s	Kotlin	2023-07-14 18:53:19

#	User	Runtime	Language	Date
1	David Connolly	0.00 s	Pascal	2023-03-13 17:22:39
2	Ingemar Ragnemalm	0.03 s	Pascal	2023-04-19 06:10:09

#	User	Runtime	Language	Date
1	Renate Fiala-Lundström	0.01 s	PHP	2023-07-15 22:56:34
2	nazifa	0.02 s	PHP	2025-04-10 20:44:57
3	Andre Wahyudi	0.03 s	PHP	2023-03-13 05:52:43

#	User	Runtime	Language	Date
1	Yanmarshus Bachtiar	0.04 s	Python 2	2023-07-11 12:29:42

#	User	Runtime	Language	Date
1	Kadin Matotek	0.04 s	Python 3	2025-03-17 07:39:26
2	Hidden user	0.04 s	Python 3	2025-10-03 21:05:21
3	Alexander Sandholdt	0.04 s	Python 3	2026-02-13 17:22:58
4	Jonathan Berg	0.04 s	Python 3	2026-03-24 12:30:06
5	Wu Bozheng	0.05 s	Python 3	2022-10-19 03:50:21
6	Zhang Haoran	0.05 s	Python 3	2022-10-19 04:32:59
7	Chen Yuxuan	0.05 s	Python 3	2022-10-19 04:39:07
8	Qi Hangjiang	0.05 s	Python 3	2022-10-19 04:46:23
9	Jason Tai Chang Sheng	0.05 s	Python 3	2022-10-19 05:07:10
10	Ramanathan Vijay Ganesh	0.05 s	Python 3	2022-10-19 05:09:17

#	User	Runtime	Language	Date
1	Drew Wilson	0.09 s	Ruby	2023-05-30 17:48:12
2	Miorel Palii	0.09 s	Ruby	2024-11-25 04:36:38
3	Eugen Neagoe	0.10 s	Ruby	2023-04-08 19:18:06
4	Russell Ng	0.11 s	Ruby	2026-03-01 23:32:18
5	Thomas Feld	0.12 s	Ruby	2023-03-20 15:22:29
6	Matzuka	0.64 s	Ruby	2025-11-21 09:23:40

#	User	Runtime	Language	Date
1	Bernard Scott	0.02 s	Swift	2026-02-10 23:32:14

#	User	Length	Language	Date
1	Danny Robinson	74	Bash	2023-09-26 06:56:51

#	User	Length	Language	Date
1	Drew Mitchell	582	C	2025-10-26 00:29:51
2	Leanna Persaud	656	C	2025-10-27 02:10:40
3	Nick Nimroozi	661	C	2025-10-26 03:26:16
4	Hidden user	686	C	2025-10-26 02:38:13
5	Julian Duniec	692	C	2024-08-13 13:07:09
6	Dave Deneus	719	C	2025-11-26 20:20:24
7	Neile Thomas	728	C	2025-10-24 07:30:23
8	Aleksandar Zivkovic	747	C	2025-10-26 00:41:05
9	Hidden user	752	C	2025-11-09 23:40:32
10	Wesley Dominica	756	C	2025-10-25 01:43:43

#	User	Length	Language	Date
1	Gregory Sinclair	332	C#	2023-11-11 05:01:56
2	traxex	383	C#	2024-05-27 15:24:02
3	Jack Cannell	897	C#	2023-12-02 20:56:00
4	William Skou Heidemann	928	C#	2024-02-23 17:10:37
5	Anthony Ye	1109	C#	2023-06-18 18:39:04
6	Umar Rasyid	1229	C#	2025-02-18 01:59:14
7	Roberto Rodriguez Giorgetti	1305	C#	2024-10-02 19:12:54
8	Esty Crow	1393	C#	2023-06-17 04:45:01
9	Michael Damsgaard	1426	C#	2024-12-30 18:47:15
10	Chen Lili	2838	C#	2023-12-02 20:53:44

#	User	Length	Language	Date
1	Marcus Xu	412	C++	2023-04-10 07:05:45
2	poopoo peepee	415	C++	2022-04-11 11:21:22
3	Jacky Blois	416	C++	2023-03-29 12:00:44
4	Hong Xingwen	454	C++	2022-09-13 05:57:30
5	王奕詠	478	C++	2025-04-23 05:04:28
6	Illia Zakharov	486	C++	2023-05-31 14:55:49
7	cp joker	499	C++	2022-04-11 11:22:08
8	Dmitry Lyubshin	504	C++	2023-03-27 07:40:57
9	Zhu Jingxi	509	C++	2022-09-07 04:49:47
10	Hidden user	513	C++	2023-06-23 19:43:45

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	690	F#	2023-04-09 09:33:51
2	Andreas Andrä-Fredsted	911	F#	2024-02-23 18:28:17
3	Jesper Bengtson	2430	F#	2026-02-13 17:02:22

#	User	Length	Language	Date
1	Chris Vilches	560	Go	2024-08-16 16:08:53
2	Norbert Voelker	865	Go	2023-03-12 11:46:46
3	Jimmy Nejtron	1716	Go	2023-03-14 11:47:11

#	User	Length	Language	Date
1	Jan Hrček	195	Haskell	2024-12-25 17:26:18
2	Charley Sheaffer	388	Haskell	2023-11-02 16:26:50
3	Hidden user	416	Haskell	2023-03-12 09:20:45
4	Steinar Simonnes	444	Haskell	2024-02-05 11:21:56
5	Brent Yorgey	574	Haskell	2023-03-12 19:21:07
6	Hidden user	578	Haskell	2023-10-08 21:34:42
7	Adam Yaser Sweilem	811	Haskell	2025-02-10 14:52:58
8	Ng Tek In	854	Haskell	2023-05-22 17:09:33

#	User	Length	Language	Date
1	Hunter Mullen	595	Java	2025-01-27 06:49:49
2	Hidden user	629	Java	2025-01-03 17:52:37
3	James	684	Java	2025-09-19 08:39:30
4	Markus Bao	725	Java	2025-10-09 04:51:39
5	Jeremy Lim	727	Java	2025-10-08 17:50:59
6	Dennis	801	Java	2024-02-24 12:51:25
7	Bowen Yang	822	Java	2023-08-24 23:50:19
8	Caleb Knapp	830	Java	2024-03-19 04:48:35
9	Henrik Bærbak Christensen	846	Java	2023-08-14 10:29:00
10	vinicius	853	Java	2026-03-09 03:46:36

#	User	Length	Language	Date
1	Emil Østergaard	665	JavaScript (Node.js)	2024-02-23 16:47:53

#	User	Length	Language	Date
1	Jimmy Gustafsson	115	JavaScript (SpiderMonkey)	2024-08-03 23:59:07
2	Bjørn Chr. Soltvedt	201	JavaScript (SpiderMonkey)	2023-03-12 03:16:53
3	Zach Tschetter	326	JavaScript (SpiderMonkey)	2023-05-19 02:42:01
4	Christian Pilegaard Cederquist	390	JavaScript (SpiderMonkey)	2023-03-12 07:43:46

#	User	Length	Language	Date
1	Adam Rankin	447	Kotlin	2023-04-22 19:30:34
2	Emil Wihlander	834	Kotlin	2023-07-27 13:21:06
3	Troy Warmboe	1110	Kotlin	2023-04-11 04:32:07
4	Ola Sundell	1162	Kotlin	2023-07-14 18:53:19
5	Martijn Muijsers	1239	Kotlin	2024-06-02 20:44:11

#	User	Length	Language	Date
1	Ingemar Ragnemalm	772	Pascal	2023-04-19 06:10:09
2	David Connolly	2908	Pascal	2023-03-13 17:22:39

#	User	Length	Language	Date
1	Renate Fiala-Lundström	381	PHP	2023-07-15 22:56:34
2	nazifa	922	PHP	2025-04-10 20:44:57
3	Andre Wahyudi	970	PHP	2023-03-13 05:52:43

#	User	Length	Language	Date
1	Yanmarshus Bachtiar	476	Python 2	2023-07-11 12:29:42

#	User	Length	Language	Date
1	Hidden user	136	Python 3	2022-10-23 00:31:03
2	Hidden user	136	Python 3	2022-10-23 18:27:47
3	David Worley	152	Python 3	2025-10-03 00:00:58
4	benoit belasco	154	Python 3	2023-07-27 01:01:24
5	Ahmed Chamseddine	164	Python 3	2024-08-06 12:12:18
6	Farzam Abrishami	165	Python 3	2023-07-30 02:33:57
7	Ryan Pitasky	169	Python 3	2024-11-11 04:03:25
8	Thomas Draper	174	Python 3	2023-03-25 20:46:15
9	Charles Ancheta	177	Python 3	2023-03-27 09:38:09
10	Arnav Sastry	181	Python 3	2023-03-11 23:25:42

#	User	Length	Language	Date
1	Thomas Feld	97	Ruby	2023-03-20 15:22:29
2	Russell Ng	124	Ruby	2026-03-01 23:53:05
3	Miorel Palii	264	Ruby	2024-11-25 04:36:38
4	Eugen Neagoe	321	Ruby	2023-04-08 19:19:33
5	Drew Wilson	456	Ruby	2023-05-30 17:48:12
6	Matzuka	572	Ruby	2025-11-21 09:23:40

#	User	Length	Language	Date
1	Vincent Lagerros	698	Rust	2025-02-23 01:24:39
2	David Rasch	787	Rust	2023-08-14 14:24:08
3	Ng Tek In	873	Rust	2023-05-18 19:14:06
4	Henrik Josefsson	888	Rust	2026-03-01 23:04:26
5	Bas Dirks	895	Rust	2023-12-25 10:42:22
6	April Clark	917	Rust	2023-10-24 22:34:46
7	Michael Jeppesen	964	Rust	2026-02-13 18:11:00
8	Sean Hagen	1035	Rust	2023-03-12 02:56:29
9	Abrahim Toutoungi	1340	Rust	2024-03-01 00:26:02
10	Emil Dichmann	1340	Rust	2025-09-20 04:17:15

#	User	Length	Language	Date
1	Bernard Scott	1661	Swift	2026-02-10 23:32:14

Solution running time distribution