Problem A
Pieces of Parentheses — Problem Statistics

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Submissions	1926
Accepted submissions	426
Submission ratio	22.12%
Authors	444
Accepted authors	324
Author ratio	72.97%

#	User	Runtime	Language	Date
1	Ivan Petrov	0.02 s	C	2019-08-09 14:00:39
2	Bernd Schmidt	0.03 s	C	2017-05-06 15:16:16

#	User	Runtime	Language	Date
1	Yu Cheng	0.01 s	C++	2017-04-15 20:27:56
2	Ye Ji	0.01 s	C++	2017-04-15 21:04:28
3	Ojas Deshpande	0.01 s	C++	2017-04-16 23:01:14
4	Paul Wild	0.01 s	C++	2017-05-29 19:03:27
5	Dmitry Lyubshin	0.01 s	C++	2018-05-13 21:27:36
6	Josef Minařík	0.01 s	C++	2020-04-17 21:03:12
7	Andrew Polizzotto	0.01 s	C++	2022-04-16 19:46:37
8	Nguyễn Anh Dũng	0.01 s	C++	2024-05-01 20:22:13
9	Ayman Ahmed	0.01 s	C++	2024-09-23 03:41:46
10	Tin Le	0.01 s	C++	2025-05-04 20:15:55

#	User	Runtime	Language	Date
1	Sichao Yang	0.14 s	Java	2018-03-18 08:06:46
2	Miguel Diaz Iturry	0.17 s	Java	2017-04-15 22:27:44
3	Zihan Wang	0.17 s	Java	2018-03-23 03:07:01
4	Alexander Fetisov	0.19 s	Java	2017-04-15 19:31:15
5	name name	0.19 s	Java	2018-05-31 21:15:29
6	Benjamin Reidys	0.22 s	Java	2019-03-03 04:38:37
7	Nick Wu	0.23 s	Java	2017-04-15 20:22:21
8	Eric Ly	0.24 s	Java	2017-04-15 21:52:11
9	Jason Portillo	0.26 s	Java	2017-04-15 23:08:38
10	Michael Chang	0.26 s	Java	2020-12-09 03:18:46

#	User	Runtime	Language	Date
1	Benjamin Laurence Erickson	0.40 s	Kotlin	2019-11-01 19:16:10

#	User	Runtime	Language	Date
1	Kevin Tang	0.33 s	Python 2	2019-02-20 21:43:34
2	Måns Magnusson	0.82 s	Python 2	2018-03-27 13:41:20

#	User	Runtime	Language	Date
1	Oskar Haarklou Veileborg	0.25 s	Python 3	2021-02-03 22:20:18
2	Lawry Sorenson	0.51 s	Python 3	2024-08-04 18:34:45
3	Arihant Jain	0.70 s	Python 3	2021-04-10 20:23:22

#	User	Length	Language	Date
1	Ivan Petrov	2550	C	2019-08-09 14:00:39
2	Bernd Schmidt	4314	C	2017-05-06 15:16:16

#	User	Length	Language	Date
1	Phan Minh Hoàng	992	C++	2017-04-24 11:31:08
2	Saad	1029	C++	2025-02-03 07:32:33
3	Oscar Burga	1064	C++	2020-10-16 05:34:47
4	Daniel Zhang	1095	C++	2019-06-04 06:52:58
5	Josef Minařík	1110	C++	2020-04-17 21:00:27
6	Sultan Aliban	1118	C++	2025-02-02 16:27:32
7	Victor Forbes	1120	C++	2017-04-15 21:15:28
8	Xingyu Zhou	1121	C++	2018-03-24 04:50:48
9	Phạm Cao Nguyên	1159	C++	2017-04-24 09:45:18
10	Jeremy Lim	1189	C++	2024-06-29 21:13:34

#	User	Length	Language	Date
1	Sichao Yang	1608	Java	2018-03-18 18:23:15
2	Benjamin Reidys	1805	Java	2020-02-15 21:15:39
3	Derek Goodwin	1832	Java	2017-04-20 17:22:47
4	Miguel Diaz Iturry	1853	Java	2017-04-15 22:27:44
5	Timothy Buzzelli	1886	Java	2017-04-15 19:22:05
6	Aegon Targaryen	2040	Java	2017-09-15 13:56:03
7	Nathan Chen	2103	Java	2025-06-18 15:10:06
8	Doug Goodman	2228	Java	2022-05-19 20:07:41
9	Alexander Fetisov	2272	Java	2017-04-15 19:31:15
10	Eric Ly	2286	Java	2017-04-15 21:52:11

#	User	Length	Language	Date
1	Benjamin Laurence Erickson	1612	Kotlin	2019-11-01 19:16:10

#	User	Length	Language	Date
1	Måns Magnusson	867	Python 2	2018-03-27 13:41:20
2	Kevin Tang	1648	Python 2	2019-02-20 21:43:34

#	User	Length	Language	Date
1	Oskar Haarklou Veileborg	591	Python 3	2021-02-04 08:25:02
2	Lawry Sorenson	815	Python 3	2024-08-04 18:34:45
3	Arihant Jain	913	Python 3	2021-04-10 20:23:22

Solution running time distribution