Problem I
Dropping Ball — Problem Statistics

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Submissions	461
Accepted submissions	107
Submission ratio	23.21%
Authors	100
Full solves [?]	80
Full solve Ratio	80.00%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.01 s	C	2019-11-06 18:42:52
2	Hidden user	0.01 s	C	2020-10-22 17:27:39
3	Ivan Petrov	0.07 s	C	2019-12-05 13:53:29

#	User	Runtime	Language	Date
1	Duy Vu	0.00 s	C++	2019-11-03 06:41:23
2	Cong Vu Ba	0.00 s	C++	2019-11-03 06:55:25
3	Atli Fannar Franklín	0.00 s	C++	2019-11-07 15:02:59
4	Nguyen Thanh Trung	0.01 s	C++	2019-10-30 07:51:19
5	Trung Nguyen	0.01 s	C++	2019-10-30 16:03:45
6	Nguyễn Diệp Xuân Quang	0.01 s	C++	2019-11-03 04:12:28
7	Quoc Cuong Tran	0.01 s	C++	2019-11-03 04:18:10
8	Lê Duy Thức	0.01 s	C++	2019-11-03 04:53:11
9	Minh Nguyen	0.01 s	C++	2019-11-03 05:16:14
10	Hidden user	0.01 s	C++	2019-11-03 05:18:21

#	User	Runtime	Language	Date
1	Doug Goodman	0.13 s	Java	2021-05-09 18:52:41

#	User	Runtime	Language	Date
1	Thomas Neill	0.07 s	Python 3	2022-01-12 04:24:53
2	Duoduo Zhao	0.08 s	Python 3	2025-08-15 19:01:06
3	Nicholas Russell Saerang	0.12 s	Python 3	2024-06-24 12:35:38
4	hz z	0.16 s	Python 3	2022-12-18 08:18:01

#	User	Length	Language	Date
1	Bergur Snorrason	3532	C	2019-11-06 18:42:52
2	Hidden user	4791	C	2020-10-22 17:27:39
3	Ivan Petrov	5360	C	2019-12-05 13:53:29

#	User	Length	Language	Date
1	Transaza Kotholoko	1642	C++	2019-11-13 18:06:02
2	Alexander Skidanov	1725	C++	2024-11-22 23:43:11
3	Minh Nguyen	1887	C++	2019-11-03 05:16:14
4	Hau Cao	1977	C++	2022-11-06 14:25:50
5	Truc An Nguyen	2077	C++	2019-11-12 10:55:03
6	Dat Vu	2162	C++	2019-11-19 09:30:56
7	Son Nguyen Cao	2222	C++	2022-02-19 01:34:43
8	Dark Seal	2228	C++	2019-11-03 06:23:12
9	Đức Minh	2229	C++	2020-02-02 08:49:11
10	congktx	2275	C++	2022-11-12 04:14:39

#	User	Length	Language	Date
1	Doug Goodman	3073	Java	2021-05-09 18:52:41

#	User	Length	Language	Date
1	Nicholas Russell Saerang	1540	Python 3	2024-06-24 12:35:38
2	Thomas Neill	2054	Python 3	2022-01-12 04:24:53
3	hz z	3099	Python 3	2022-12-18 08:18:01
4	Duoduo Zhao	4274	Python 3	2025-08-15 19:01:06

Solution running time distribution