Problem A
Sentry Robots — Problem Statistics

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Submissions	531
Accepted submissions	224
Submission ratio	42.18%
Authors	189
Accepted authors	168
Author ratio	88.89%

#	User	Runtime	Language	Date
1	Ivan Petrov	0.00 s	C	2019-07-26 09:57:32

#	User	Runtime	Language	Date
1	Norbert Voelker	0.04 s	Go	2023-05-02 00:37:57

#	User	Runtime	Language	Date
1	Doug Goodman	0.14 s	Java	2022-07-01 20:44:57
2	Brent Yorgey	0.27 s	Java	2021-12-01 00:37:49
3	Katz Roy	0.68 s	Java	2022-09-30 04:11:23

#	User	Runtime	Language	Date
1	Pang Yuan Ker	0.12 s	Python 3	2022-09-26 09:48:45
2	Måns Magnusson	0.13 s	Python 3	2021-10-05 19:45:22
3	Maj Stenmark	0.13 s	Python 3	2021-10-07 22:46:34
4	Wang Yibin	0.16 s	Python 3	2021-10-11 20:58:34
5	Zhang Grace Jia Yi	0.17 s	Python 3	2022-09-28 13:50:19
6	Ng Wee Han	0.17 s	Python 3	2022-10-10 15:49:55
7	Lim Jun Hup	0.19 s	Python 3	2022-10-10 12:24:41
8	Kang Liwei	0.21 s	Python 3	2021-10-13 13:04:41
9	D. Salgado	0.24 s	Python 3	2023-06-12 07:13:21
10	Lim Sheng Jie	0.25 s	Python 3	2021-10-12 20:19:36

#	User	Length	Language	Date
1	Ivan Petrov	2786	C	2019-07-26 09:57:32

#	User	Length	Language	Date
1	Hidden user	1571	C++	2020-06-16 10:03:11
2	Roman Yanushevskyi	1694	C++	2024-03-17 17:22:10
3	Mårten Wiman	1750	C++	2016-09-27 17:46:54
4	William Gan	1772	C++	2018-08-05 11:36:56
5	Yeung Man Tsung	1830	C++	2024-03-18 09:16:32
6	Fredrik Hernqvist	1850	C++	2016-09-27 19:01:36
7	Hubert Teo	1915	C++	2017-02-17 05:02:07
8	Yiwen101	1921	C++	2024-03-12 14:21:11
9	Dmitry Lyubshin	1944	C++	2023-05-06 15:46:55
10	keyansheng	2000	C++	2025-03-06 11:37:36

#	User	Length	Language	Date
1	Norbert Voelker	3789	Go	2023-05-02 00:37:57

#	User	Length	Language	Date
1	Doug Goodman	3145	Java	2022-07-01 20:44:57
2	Katz Roy	10224	Java	2022-09-30 04:11:23
3	Brent Yorgey	11294	Java	2021-12-01 00:37:49

#	User	Length	Language	Date
1	Nicholas Russell Saerang	1343	Python 3	2025-03-07 17:35:26
2	Kang Liwei	2174	Python 3	2021-10-13 13:04:41
3	Ruan Bo Kai	2683	Python 3	2022-09-21 07:35:31
4	Pang Yuan Ker	2712	Python 3	2022-09-26 09:48:45
5	Teoh Jun Jie	2740	Python 3	2022-10-07 19:12:45
6	D. Salgado	2766	Python 3	2023-06-12 07:13:21
7	Lim Jun Hup	3151	Python 3	2022-10-10 12:24:41
8	Måns Magnusson	3305	Python 3	2021-10-05 19:45:22
9	Maj Stenmark	3305	Python 3	2021-10-07 22:46:34
10	Wang Yibin	5525	Python 3	2021-10-11 20:58:34

Solution running time distribution