Problem A
Context-Free Grammar Parsing — Problem Statistics

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Submissions	1553
Accepted submissions	710
Submission ratio	45.72%
Authors	221
Full solves [?]	125
Full solve Ratio	56.56%

#	User	Score	Language	Date
1	Swapnil Saha	90	C	2021-09-15 19:13:54

#	User	Score	Language	Date
1	Hidden user	80	C#	2017-09-20 04:02:51

#	User	Score	Language	Date
1	Joseph Huang	90	Go	2016-09-14 03:49:15
2	Alexander Crosby	80	Go	2023-02-08 07:00:07

#	User	Score	Language	Date
1	Andrew Molina	100	JavaScript (Node.js)	2024-02-06 00:22:28

#	User	Score	Language	Date
1	Hidden user	100	Python 2	2016-09-19 19:58:13
2	Andrew Kronser	100	Python 2	2017-09-13 05:16:14
3	Greg Hamerly	100	Python 2	2017-09-21 20:36:20
4	Scott Fitzgerald	100	Python 2	2017-09-21 22:33:26
5	Sean Lavoie	90	Python 2	2017-09-25 07:37:58

#	User	Runtime	Language	Date
1	Dong Li	0.22 s	C++	2025-09-18 08:40:41
2	William Kiarie Waweru	0.22 s	C++	2026-02-17 03:26:12
3	Joseph Zuniga	0.32 s	C++	2025-09-23 03:13:20
4	Kyle Thompson	0.32 s	C++	2026-02-16 00:58:51
5	Andrew Baas	0.34 s	C++	2017-09-14 17:11:50
6	Zeba Tusnia Towshi	0.35 s	C++	2025-12-10 04:23:18
7	Sharmin Fatema	0.48 s	C++	2025-09-17 04:07:21
8	Nicole Hosh	0.54 s	C++	2021-09-20 12:02:53
9	Gan-Orgil Gantumur	0.58 s	C++	2026-02-17 04:43:58
10	AGM ISLAM	0.91 s	C++	2021-09-16 21:20:31

#	User	Runtime	Language	Date
1	Tanvir Ahmed Redoy	0.61 s	Java	2025-09-22 10:01:46
2	Hidden user	1.20 s	Java	2017-09-17 04:39:18
3	Hidden user	1.76 s	Java	2017-09-20 20:49:05
4	Zhan Su	1.88 s	Java	2026-02-14 01:49:41
5	Hidden user	2.28 s	Java	2026-02-17 05:41:49
6	Sam Choi	4.04 s	Java	2026-02-15 23:09:58
7	Khifayat Abolurin	4.87 s	Java	2025-02-05 02:32:02
8	Robert Cepa	4.96 s	Java	2016-09-20 17:14:37
9	Korn Sooksatra	5.02 s	Java	2020-09-19 19:15:43
10	张珂燃	5.14 s	Java	2016-09-14 21:27:22

#	User	Runtime	Language	Date
1	Andrew Molina	7.73 s	JavaScript (Node.js)	2024-02-06 00:22:28

#	User	Runtime	Language	Date
1	Greg Hamerly	7.50 s	Python 2	2019-09-20 18:33:14
2	Scott Fitzgerald	18.24 s	Python 2	2017-09-21 22:33:26
3	Andrew Kronser	19.51 s	Python 2	2017-09-13 05:16:14
4	Hidden user	19.83 s	Python 2	2016-09-19 19:58:13

#	User	Runtime	Language	Date
1	Alejandro Rodríguez Pérez	1.63 s	Python 3	2022-09-15 07:10:05
2	Jared Jones	4.36 s	Python 3	2025-09-22 19:48:29
3	Ana Paula Arguelles Terron	4.46 s	Python 3	2024-09-23 02:01:49
4	Abanisenioluwa Kolawole Orojo	4.50 s	Python 3	2024-09-20 05:32:12
5	Kofi Nketia Ackaah-Gyasi	4.51 s	Python 3	2024-09-24 04:00:47
6	Christopher Chenoweth	5.05 s	Python 3	2024-09-23 20:59:48
7	Aaron L Carney	6.84 s	Python 3	2024-09-17 06:21:07
8	Spencer Hammack	7.22 s	Python 3	2025-09-23 03:55:00
9	Joseph Torres	7.66 s	Python 3	2026-01-31 04:15:15
10	Reagan Rubio	7.90 s	Python 3	2025-09-23 03:07:13

#	User	Length	Language	Date
1	Nicole Hosh	1434	C++	2021-09-20 12:02:53
2	Sharmin Fatema	1851	C++	2025-09-17 04:13:52
3	Ernesto Quevedo Caballero	1855	C++	2021-09-15 07:33:09
4	Dong Li	1901	C++	2025-09-18 08:40:41
5	Joseph Zuniga	2108	C++	2025-09-23 03:13:20
6	Mafizur Rahman	2173	C++	2022-09-19 22:17:33
7	Michael Crowther	2173	C++	2023-01-31 04:43:25
8	Noah	2183	C++	2026-02-14 01:34:59
9	Kelechi Fletcher	2184	C++	2016-09-19 15:31:27
10	Victoria Covey	2197	C++	2026-02-03 04:28:53

#	User	Length	Language	Date
1	Korn Sooksatra	1742	Java	2020-09-19 19:15:43
2	Will henderson	2276	Java	2024-09-23 03:26:15
3	Jonathan Myers	2453	Java	2017-09-21 12:34:09
4	Matt Harrison	2456	Java	2024-09-19 05:37:50
5	Tonni Das Jui	2472	Java	2021-09-12 00:34:50
6	Khifayat Abolurin	2710	Java	2025-02-05 02:32:02
7	Vincent Bushong	2728	Java	2019-09-24 03:36:15
8	Mark Josephs	2736	Java	2025-09-22 05:21:50
9	Clinton Adu Yeboah	2753	Java	2019-09-23 20:39:06
10	Paul Wolfe	2992	Java	2024-02-02 03:06:35

#	User	Length	Language	Date
1	Andrew Molina	3271	JavaScript (Node.js)	2024-02-06 00:22:28

#	User	Length	Language	Date
1	Andrew Kronser	1289	Python 2	2017-09-13 05:16:14
2	Greg Hamerly	1819	Python 2	2019-09-20 18:33:14
3	Scott Fitzgerald	2173	Python 2	2017-09-21 22:33:26
4	Hidden user	5794	Python 2	2016-09-19 19:58:13

#	User	Length	Language	Date
1	Ryan Sherer	1035	Python 3	2025-03-29 20:47:45
2	Christopher Chenoweth	1300	Python 3	2024-09-23 20:59:48
3	Xinyu Wu	1480	Python 3	2024-09-18 07:59:56
4	Bryant Huang	1509	Python 3	2024-09-23 08:12:57
5	Maryam Samami	1640	Python 3	2025-09-24 07:41:53
6	John Jr	1693	Python 3	2026-02-17 05:24:12
7	Aaron L Carney	1694	Python 3	2024-09-17 06:21:07
8	Reagan Rubio	1765	Python 3	2025-09-23 03:07:13
9	Alan Villagrand	1769	Python 3	2026-02-15 23:38:19
10	Daniel Michael	1779	Python 3	2026-02-15 23:18:22

Solution running time distribution