Problem I
Black Out — Problem Statistics

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Submissions	1105
Accepted submissions	360
Submission ratio	32.58%
Authors	327
Full solves [?]	286
Full solve Ratio	87.46%

#	User	Runtime	Language	Date
1	Adam Stuart Richardson	0.01 s	C	2015-03-21 22:17:36
2	Jón Steinn Elíasson	0.01 s	C	2017-07-18 22:46:31
3	Josenildo Silva	0.01 s	C	2018-04-19 16:37:27
4	Dodi Vebri Wicahyo	0.01 s	C	2018-05-05 19:28:33
5	Soukayna Khzizou	0.01 s	C	2018-05-06 23:06:24
6	Ivan Petrov	0.01 s	C	2019-07-19 16:30:22
7	Bergur Snorrason	0.01 s	C	2022-01-23 13:19:05
8	kailany faustino	0.01 s	C	2022-11-12 23:18:18

#	User	Runtime	Language	Date
1	Joshua Braley	0.01 s	Go	2025-03-31 23:41:43
2	Norbert Voelker	0.03 s	Go	2021-12-11 19:49:09
3	Sander Hellesø	0.04 s	Go	2019-04-26 05:48:29
4	Hidden user	0.10 s	Go	2018-04-24 16:03:26
5	Jón Steinn Elíasson	0.11 s	Go	2017-07-19 01:42:57

#	User	Runtime	Language	Date
1	Nick Wu	0.10 s	Java	2015-03-21 19:36:45
2	Thomas Rooijakkers	0.10 s	Java	2016-10-20 21:52:31
3	Joshua Kirstein	0.13 s	Java	2015-03-21 20:31:23
4	Taras Romanyuk	0.13 s	Java	2025-02-03 00:50:23
5	Zhen Lin	0.15 s	Java	2016-04-23 21:26:27
6	Malte Larsson	0.16 s	Java	2017-08-19 19:07:40
7	Ronald Cruz	0.16 s	Java	2017-11-18 05:28:27
8	Takashi Wickes	0.17 s	Java	2015-03-24 01:47:52
9	Jón Steinn Elíasson	0.17 s	Java	2017-07-18 22:39:09
10	Michael Ray Gill	0.17 s	Java	2018-02-14 18:04:25

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.03 s	JavaScript (SpiderMonkey)	2024-09-08 18:32:59
2	Bjørn Chr. Soltvedt	0.04 s	JavaScript (SpiderMonkey)	2019-01-06 22:53:59

#	User	Runtime	Language	Date
1	Adam Rankin	0.22 s	Kotlin	2023-09-04 19:43:26
2	Jacob Huebner	0.31 s	Kotlin	2020-03-20 22:19:01

#	User	Runtime	Language	Date
1	Andreas Björklund	0.05 s	Python 2	2021-02-08 21:40:24
2	Ethan Arnold	0.07 s	Python 2	2019-12-15 07:14:24

#	User	Runtime	Language	Date
1	Magdirag Dag	0.03 s	Python 3	2017-10-13 16:56:18
2	Martin Tran	0.04 s	Python 3	2018-09-22 23:21:20
3	Yosuke Mizutani	0.04 s	Python 3	2019-11-26 03:04:40
4	Flavio Drogo	0.05 s	Python 3	2024-10-12 14:48:20
5	Gabriella Gloria	0.05 s	Python 3	2025-05-10 10:07:20
6	Arshia Zakeri Rad	0.06 s	Python 3	2024-12-01 07:03:37
7	George Zhang	0.06 s	Python 3	2024-12-01 07:13:55
8	Nicolai Robinson	0.06 s	Python 3	2025-05-29 15:36:02
9	Julina Savela	0.06 s	Python 3	2025-05-30 15:57:16
10	Jiayi Liu	0.06 s	Python 3	2025-05-30 16:01:51

#	User	Runtime	Language	Date
1	Thomas Feld	0.07 s	Ruby	2023-08-02 15:14:34

#	User	Length	Language	Date
1	Josenildo Silva	373	C	2018-04-19 16:37:27
2	Ivan Petrov	418	C	2019-07-19 16:30:22
3	kailany faustino	487	C	2022-12-05 14:53:24
4	Adam Stuart Richardson	534	C	2015-03-21 22:17:36
5	Jón Steinn Elíasson	558	C	2017-07-18 22:46:31
6	Dodi Vebri Wicahyo	558	C	2018-05-05 19:28:33
7	Bergur Snorrason	558	C	2022-01-23 13:19:05
8	Soukayna Khzizou	560	C	2018-05-06 23:06:24

#	User	Length	Language	Date
1	Markus Mathiasen	343	C++	2021-10-04 19:35:04
2	Declan McDonnell	345	C++	2019-04-02 22:31:22
3	Teikn Smith	347	C++	2024-03-21 00:35:36
4	Johan Wind	348	C++	2018-10-09 19:59:25
5	Clement Oh	362	C++	2023-11-21 06:50:41
6	Roger Chen	369	C++	2022-08-03 17:04:54
7	Jerome Leow	374	C++	2020-11-22 03:11:30
8	Antonio Molina Lovett	378	C++	2016-02-14 06:11:32
9	Changyu Zhu	380	C++	2019-03-28 21:12:14
10	YanHao Ling	385	C++	2018-06-11 05:59:07

#	User	Length	Language	Date
1	Hidden user	562	Go	2018-04-24 16:03:26
2	Joshua Braley	563	Go	2025-03-31 23:41:43
3	Jón Steinn Elíasson	565	Go	2017-07-19 01:42:57
4	Sander Hellesø	791	Go	2019-04-26 05:48:29
5	Norbert Voelker	948	Go	2021-12-11 19:49:09

#	User	Length	Language	Date
1	Brian Mungal	521	Java	2024-04-12 20:43:12
2	Kevin Sanft	544	Java	2024-05-08 21:57:04
3	Nguyen Anh Tuan	615	Java	2021-01-31 17:49:22
4	Faizul Anis	615	Java	2022-08-31 16:43:59
5	Nick Burger	615	Java	2022-10-24 19:41:40
6	Farhad Cader	615	Java	2024-06-11 06:12:55
7	Oliver Prip Hagmund	619	Java	2022-09-09 18:14:00
8	Ericka Kyle Rojas	619	Java	2023-08-02 17:29:31
9	Peter Siba	619	Java	2024-08-30 22:37:32
10	Meer Singh Sodhi	620	Java	2022-04-12 00:35:20

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	363	JavaScript (SpiderMonkey)	2019-01-06 22:53:59
2	Christian Pilegaard Cederquist	395	JavaScript (SpiderMonkey)	2024-09-08 18:32:59

#	User	Length	Language	Date
1	Adam Rankin	530	Kotlin	2023-09-04 19:43:26
2	Jacob Huebner	537	Kotlin	2020-03-20 22:19:01

#	User	Length	Language	Date
1	Andreas Björklund	442	Python 2	2021-02-08 21:40:24
2	Ethan Arnold	1284	Python 2	2019-12-15 07:14:24

#	User	Length	Language	Date
1	Luna Skjernaa Mygind	133	Python 3	2023-05-19 09:49:12
2	Peter Stauder	153	Python 3	2023-06-08 14:18:51
3	Charles Ancheta	222	Python 3	2023-04-13 09:27:02
4	Yong Mao	229	Python 3	2023-09-21 02:05:00
5	George Zhang	229	Python 3	2024-12-01 07:17:31
6	alexandre dewilde	230	Python 3	2023-08-03 11:47:32
7	Nicolai Robinson	237	Python 3	2025-05-29 15:36:02
8	Nicholas Russell Saerang	273	Python 3	2023-06-19 17:22:32
9	Magdirag Dag	275	Python 3	2017-10-13 16:56:18
10	Guan Yang Ze	276	Python 3	2021-03-02 21:09:09

#	User	Length	Language	Date
1	Thomas Feld	125	Ruby	2023-08-02 15:32:41

Solution running time distribution