Problem J
Keep the Parade Safe — Problem Statistics

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Submissions	1281
Accepted submissions	190
Submission ratio	14.83%
Authors	218
Full solves [?]	115
Full solve Ratio	52.75%

#	User	Runtime	Language	Date
1	Ivan Petrov	0.01 s	C	2020-01-15 14:25:22
2	Ioannis Br	0.01 s	C	2021-02-03 22:41:25

#	User	Runtime	Language	Date
1	Eric Williamson	0.25 s	Java	2018-01-20 23:19:41

#	User	Runtime	Language	Date
1	Jonatan Nilsson	0.10 s	Python 2	2019-10-22 14:33:56
2	Lars Åström	0.10 s	Python 2	2019-10-22 19:09:58
3	Björn Magnusson	0.10 s	Python 2	2019-10-28 16:58:36

#	User	Runtime	Language	Date
1	Nicholas Russell Saerang	0.12 s	Python 3	2025-05-18 17:49:55

#	User	Length	Language	Date
1	Ivan Petrov	3551	C	2020-01-15 14:25:22
2	Ioannis Br	8173	C	2021-02-03 22:41:25

#	User	Length	Language	Date
1	Ivan Petrov	2447	C++	2020-01-15 14:04:26
2	25 - 7a13 - Nguyen Khang Ninh	2728	C++	2026-01-28 16:13:25
3	Nguyen Xuan Tung	2772	C++	2019-09-24 16:45:52
4	Rico Tiongson	2790	C++	2017-12-08 15:42:30
5	Li Jack	3076	C++	2019-05-20 04:03:51
6	Kim Hao Nguyen Duong	3115	C++	2017-11-05 06:29:00
7	Elite_Vanor	3120	C++	2022-09-02 17:48:49
8	Anthony Wong	3129	C++	2017-11-05 06:39:15
9	Siva Tanikonda	3309	C++	2020-08-01 22:07:36
10	Huangjie Zhao	3486	C++	2017-11-15 11:15:19

#	User	Length	Language	Date
1	Eric Williamson	7414	Java	2018-01-20 23:19:41

#	User	Length	Language	Date
1	Jonatan Nilsson	1783	Python 2	2019-10-22 14:33:56
2	Lars Åström	1783	Python 2	2019-10-22 19:09:58
3	Björn Magnusson	1783	Python 2	2019-10-28 16:58:36

#	User	Length	Language	Date
1	Nicholas Russell Saerang	1482	Python 3	2025-06-12 22:49:30

Solution running time distribution