Problem A
Beach Ball Serve — Problem Statistics

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Submissions	52
Accepted submissions	17
Submission ratio	32.69%
Authors	10
Accepted authors	8
Author ratio	80.00%

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	C++	2025-03-08 22:57:53
2	Ethan Luo	0.00 s	C++	2025-03-09 00:43:41
3	Nick Wu	0.00 s	C++	2025-08-26 20:39:29
4	Hidden user	0.01 s	C++	2025-08-14 15:52:35

#	User	Runtime	Language	Date
1	Hidden user	0.12 s	Java	2025-03-09 18:16:07

#	User	Runtime	Language	Date
1	Hidden user	0.04 s	Python 3	2025-06-18 20:08:12
2	Hidden user	0.05 s	Python 3	2025-03-08 23:34:19
3	Duoduo Zhao	0.05 s	Python 3	2025-09-06 17:39:52
4	Ahmed Siadomar	0.07 s	Python 3	2025-03-08 22:28:54
5	Allan Kong	0.10 s	Python 3	2025-03-16 04:34:17

#	User	Length	Language	Date
1	Hidden user	868	C++	2025-08-14 15:52:54
2	Ethan Luo	1747	C++	2025-03-09 00:43:41
3	Nick Wu	3898	C++	2025-08-26 20:39:29
4	Hidden user	30540	C++	2025-03-08 22:57:53

#	User	Length	Language	Date
1	Hidden user	1477	Java	2025-03-09 18:16:07

#	User	Length	Language	Date
1	Hidden user	671	Python 3	2025-08-24 20:10:52
2	Ahmed Siadomar	925	Python 3	2025-03-08 22:28:54
3	Hidden user	934	Python 3	2025-03-08 23:34:19
4	Allan Kong	1575	Python 3	2025-03-16 04:34:17
5	Duoduo Zhao	2646	Python 3	2025-09-06 17:39:52

Solution running time distribution