Problem A
Black and White — Problem Statistics

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Submissions	560
Accepted submissions	260
Submission ratio	46.43%
Authors	207
Full solves [?]	169
Full solve Ratio	81.64%

#	User	Runtime	Language	Date
1	Mirel Cosulschi	0.17 s	C	2025-05-25 09:45:10

#	User	Runtime	Language	Date
1	Тимофей Онищук	0.07 s	C++	2024-11-16 17:08:51
2	Alexander Kravberg	0.07 s	C++	2025-06-21 21:35:32
3	Noah Webber	0.11 s	C++	2026-01-31 21:07:06
4	paopaomate	0.11 s	C++	2026-03-15 21:08:48
5	Matthew Shang	0.13 s	C++	2022-03-21 06:29:55
6	Cameron Custer	0.13 s	C++	2022-03-25 20:09:49
7	Vernon Gutierrez	0.13 s	C++	2023-10-18 19:00:29
8	Vlad Kurgankin	0.13 s	C++	2024-05-28 19:41:26
9	Sujay Konda	0.13 s	C++	2026-01-31 19:09:08
10	Dhruv Patel	0.14 s	C++	2022-03-05 21:34:35

#	User	Runtime	Language	Date
1	Karlz Jeffrey Sarquilla	0.31 s	Java	2023-07-28 17:51:25
2	Bjørn Dons	0.33 s	Java	2023-08-10 21:36:37
3	Jacob Magnuson	0.36 s	Java	2022-07-19 03:21:16
4	Jerry Xiong	0.37 s	Java	2022-03-05 20:25:46
5	Vidith Madhu	0.37 s	Java	2022-03-05 21:43:43
6	Caleb Hu	0.40 s	Java	2022-03-05 23:21:21
7	Ericka Kyle Rojas	0.41 s	Java	2023-08-11 13:31:45
8	Chris Gittings	0.44 s	Java	2022-03-09 06:05:18
9	Kath Racal	0.44 s	Java	2023-08-04 05:39:53
10	Kathleen Heart Racal	0.44 s	Java	2023-08-14 13:13:03

#	User	Runtime	Language	Date
1	Danny Mittal	0.43 s	Kotlin	2022-03-19 21:35:48
2	Nicholas Johnson	0.67 s	Kotlin	2022-03-20 17:15:03
3	Jacob Huebner	0.67 s	Kotlin	2022-03-22 21:26:38

#	User	Runtime	Language	Date
1	paopaomate	0.30 s	Python 3	2026-03-16 10:49:32
2	Arnav Sastry	0.52 s	Python 3	2022-03-17 15:56:41
3	Ryan Kells	0.56 s	Python 3	2025-10-17 22:20:09
4	Nicholas Tarsis	0.60 s	Python 3	2024-06-30 02:36:30
5	Kevin Li	0.67 s	Python 3	2022-03-06 08:23:55
6	Kelly Dance	0.84 s	Python 3	2022-03-31 21:02:23
7	Pim Agterberg	0.86 s	Python 3	2022-10-05 02:11:54

#	User	Length	Language	Date
1	Mirel Cosulschi	909	C	2025-05-25 09:45:10

#	User	Length	Language	Date
1	Yongchen Zhou	592	C++	2022-03-05 21:18:07
2	Ricardo Ruiz	745	C++	2022-06-22 15:13:48
3	Donald Dong	771	C++	2022-03-19 10:29:59
4	Hidden user	791	C++	2026-02-14 00:19:02
5	Neal Zane	846	C++	2022-06-25 09:16:40
6	Omar Muhammetkulyyev	854	C++	2024-10-15 00:33:25
7	Bach Tran	901	C++	2026-01-31 22:40:12
8	Dmitry Lyubshin	911	C++	2023-05-10 15:56:50
9	BluefrumS	952	C++	2025-04-16 22:11:14
10	Nathan Nguyen	954	C++	2024-02-18 18:50:15

#	User	Length	Language	Date
1	Doug Goodman	1212	Java	2022-03-20 19:07:01
2	Chris Gittings	1266	Java	2022-03-09 06:05:18
3	Karlz Jeffrey Sarquilla	1386	Java	2023-07-28 17:51:25
4	Caleb Hu	1431	Java	2022-03-05 23:21:21
5	Ericka Kyle Rojas	1579	Java	2023-08-11 13:31:45
6	Jerry Xiong	1644	Java	2022-03-05 20:25:46
7	Kath Racal	1644	Java	2023-08-04 05:39:53
8	Kathleen Heart Racal	1644	Java	2023-08-14 13:13:03
9	Jacob Magnuson	1834	Java	2022-07-19 03:21:16
10	Jeffrey H.	2104	Java	2023-08-06 19:30:07

#	User	Length	Language	Date
1	Danny Mittal	957	Kotlin	2022-03-19 21:35:48
2	Jacob Huebner	1429	Kotlin	2022-03-22 21:26:38
3	Nicholas Johnson	1725	Kotlin	2022-03-20 17:15:03

#	User	Length	Language	Date
1	Nicholas Tarsis	659	Python 3	2024-06-30 02:36:30
2	Pim Agterberg	1159	Python 3	2022-10-06 13:42:07
3	Ryan Kells	1211	Python 3	2025-10-17 22:20:09
4	Arnav Sastry	1293	Python 3	2022-03-17 15:56:41
5	Kelly Dance	1325	Python 3	2022-03-31 21:02:23
6	paopaomate	1792	Python 3	2026-03-16 10:49:32
7	Kevin Li	3683	Python 3	2022-03-06 08:23:55

Solution running time distribution