Problem A
Piano Lessons — Problem Statistics

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Submissions	539
Accepted submissions	255
Submission ratio	47.31%
Authors	198
Full solves [?]	196
Full solve Ratio	98.99%

#	User	Runtime	Language	Date
1	Ahmed Siadomar	0.05 s	C++	2023-11-20 16:53:09
2	Jerry Xu	0.05 s	C++	2023-11-22 00:41:16
3	RUI GUO	0.05 s	C++	2023-12-09 02:49:45
4	Jad Chehimi	0.05 s	C++	2025-12-02 18:59:43
5	Sandra Taskovic	0.05 s	C++	2025-12-08 06:19:23
6	Aymone Wilson-bahun	0.05 s	C++	2025-12-08 08:58:28
7	Vedant Vyas	0.06 s	C++	2023-12-02 09:29:07
8	Danila Seliayeu	0.09 s	C++	2023-12-08 04:10:01
9	Yuting He	0.12 s	C++	2022-12-05 04:45:49
10	Matthew Shocrylas	0.12 s	C++	2022-12-06 02:36:32

#	User	Runtime	Language	Date
1	Chris Cervania	0.09 s	Python 3	2025-11-30 23:50:27
2	Hudeyfa Jimale	0.09 s	Python 3	2025-12-09 00:23:53
3	Cole Dewis	0.10 s	Python 3	2023-11-17 17:47:27
4	Carlin Boyles	0.10 s	Python 3	2023-11-22 05:38:19
5	Hidden user	0.10 s	Python 3	2023-12-08 08:09:03
6	Hamidat	0.10 s	Python 3	2025-11-27 16:20:15
7	Hidden user	0.10 s	Python 3	2025-11-28 00:56:09
8	Roderick Lan	0.10 s	Python 3	2025-12-08 22:07:07
9	Hidden user	0.11 s	Python 3	2022-11-30 03:23:22
10	Ahmad Amali	0.11 s	Python 3	2022-12-04 22:40:06

#	User	Runtime	Language	Date
1	Tianyi Zhang	0.60 s	Python 3 with NumPy	2025-12-09 02:03:46
2	Silin Song	0.69 s	Python 3 with NumPy	2025-11-22 20:48:26
3	Julia Doan	0.69 s	Python 3 with NumPy	2025-12-06 06:26:42
4	Vansh Srivastav	3.04 s	Python 3 with NumPy	2025-12-03 21:07:16

#	User	Runtime	Language	Date
1	Krish Lal	0.31 s	Rust	2025-12-01 02:17:52
2	Logan Travis	0.32 s	Rust	2025-11-24 04:29:36

#	User	Length	Language	Date
1	Jayden Cho	807	C++	2022-12-03 01:42:34
2	YUXUAN FU	867	C++	2023-12-05 00:01:52
3	Artem Anosov Morozov	1002	C++	2025-12-09 00:40:58
4	Kevin Wu	1123	C++	2022-12-04 13:23:34
5	Tran Phuong Anh Nguyen	1247	C++	2023-12-08 21:55:05
6	Bennett Wiredu	1275	C++	2022-12-08 03:23:29
7	Raghav Chandak	1391	C++	2022-12-09 03:26:36
8	Sashreek Magan	1393	C++	2023-12-05 06:12:50
9	qilong li	1400	C++	2022-11-22 05:49:21
10	Faiza Rahman	1400	C++	2025-12-01 02:50:38

#	User	Length	Language	Date
1	Mingbo Feng	599	Python 3	2025-12-05 18:31:10
2	Ximeng Duan	670	Python 3	2025-12-02 23:44:39
3	Rachit Anugula	792	Python 3	2025-12-03 20:30:11
4	Wenhao You	867	Python 3	2023-11-19 05:11:11
5	David Onchuru	1123	Python 3	2023-12-01 07:50:02
6	Binh Phan	1149	Python 3	2025-12-01 02:37:46
7	Karl Zhong	1255	Python 3	2023-12-03 02:13:02
8	Nick Shan	1326	Python 3	2025-12-08 22:53:52
9	Felix Wang	1327	Python 3	2023-12-08 09:47:22
10	Aryan Kalwani	1332	Python 3	2022-12-03 23:16:56

#	User	Length	Language	Date
1	Tianyi Zhang	1785	Python 3 with NumPy	2025-12-09 02:03:46
2	Julia Doan	1807	Python 3 with NumPy	2025-12-06 06:26:42
3	Vansh Srivastav	2361	Python 3 with NumPy	2025-12-03 21:07:16
4	Silin Song	2807	Python 3 with NumPy	2025-11-22 20:48:26

#	User	Length	Language	Date
1	Logan Travis	6719	Rust	2025-11-24 04:29:36
2	Krish Lal	7802	Rust	2025-12-01 02:17:52

Solution running time distribution