Problem A
Good Coalition — Problem Statistics

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Submissions	2057
Accepted submissions	661
Submission ratio	32.13%
Authors	581
Full solves [?]	495
Full solve Ratio	85.20%

#	User	Runtime	Language	Date
1	Adam Stuart Richardson	0.00 s	C	2015-03-21 18:29:02
2	Colin MacGinnitie	0.00 s	C	2018-05-05 20:02:48
3	Ivan Petrov	0.00 s	C	2019-07-22 08:05:58
4	Bergur Snorrason	0.00 s	C	2019-11-22 17:50:25
5	Eyleifur Bjarkason	0.00 s	C	2019-11-22 20:00:38
6	Cristian Diaz	0.00 s	C	2020-02-15 09:41:37
7	Rajan Saini	0.00 s	C	2020-02-23 00:15:20
8	Song, Junhao	0.00 s	C	2020-10-21 14:25:44
9	Alexander Bilde Pedersen	0.00 s	C	2023-07-25 20:29:35

#	User	Runtime	Language	Date
1	Bas te Kolste	0.02 s	C#	2015-06-15 20:51:09
2	Hamdanil Rasyid	0.07 s	C#	2025-01-08 21:40:56

#	User	Runtime	Language	Date
1	Norbert Voelker	0.01 s	Go	2024-06-05 20:53:14
2	Steven Cheng	0.02 s	Go	2020-06-03 18:02:59
3	Aleksander Jan Mistewicz	0.03 s	Go	2019-05-12 12:22:22

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.02 s	Haskell	2025-07-15 07:34:29
2	Linus Eklund	0.09 s	Haskell	2017-01-19 20:38:22
3	Brent Yorgey	0.21 s	Haskell	2018-09-08 13:46:31

#	User	Runtime	Language	Date
1	Bjørn Dons	0.07 s	Java	2018-12-07 00:42:55
2	Ryan Kelsey	0.08 s	Java	2015-03-21 19:50:46
3	Jan Štola	0.08 s	Java	2015-06-04 18:00:30
4	Felix Grape	0.08 s	Java	2016-12-09 10:12:42
5	Hidden user	0.08 s	Java	2016-12-10 18:51:51
6	Janne Selkälä	0.08 s	Java	2016-12-11 14:24:19
7	Crystal Sharpe	0.08 s	Java	2020-08-23 03:38:56
8	Johan Sannemo	0.09 s	Java	2012-11-07 17:59:06
9	Nick Wu	0.09 s	Java	2015-03-21 17:29:00
10	Erik Baalhuis	0.09 s	Java	2016-08-08 15:11:52

#	User	Runtime	Language	Date
1	Ursula Hebert-Johnson	0.45 s	JavaScript (Node.js)	2020-02-20 23:23:53

#	User	Runtime	Language	Date
1	Jacob Huebner	0.22 s	Kotlin	2020-03-20 07:05:17
2	Adam Rankin	0.39 s	Kotlin	2023-10-01 05:20:32

#	User	Runtime	Language	Date
1	Christofer Ohlsson	0.05 s	Python 2	2015-04-30 07:07:53
2	Daniel Strizhevsky	0.06 s	Python 2	2017-06-29 06:31:51
3	Johan Lyts	0.07 s	Python 2	2019-04-07 13:02:44
4	Hidden user	0.07 s	Python 2	2019-05-06 18:45:46
5	Oskar Haarklou Veileborg	0.07 s	Python 2	2019-10-24 12:48:22
6	Jasper Lu	0.08 s	Python 2	2017-06-28 05:49:37
7	Felix Balthasar Berief	0.08 s	Python 2	2019-05-12 20:47:22
8	Andreas Björklund	0.08 s	Python 2	2021-02-08 15:10:59
9	Kasper Borys	0.09 s	Python 2	2017-04-22 18:47:04
10	Lars Åström	0.09 s	Python 2	2019-09-16 06:34:04

#	User	Runtime	Language	Date
1	Carmen	0.05 s	Python 3	2025-04-09 13:17:00
2	Jiaming Kong	0.05 s	Python 3	2025-08-08 04:51:06
3	Hidden user	0.05 s	Python 3	2026-02-14 10:30:59
4	Sannidhi Agarwal	0.05 s	Python 3	2026-02-25 05:31:36
5	paopaomate	0.05 s	Python 3	2026-03-16 10:04:53
6	Naveen Kumar S	0.06 s	Python 3	2026-02-21 05:30:13
7	Flavio Drogo	0.07 s	Python 3	2024-10-14 18:47:50
8	Himanshu goyal	0.07 s	Python 3	2026-01-24 08:54:05
9	Hidden user	0.07 s	Python 3	2026-02-21 17:19:44
10	Charlie Heger	0.07 s	Python 3	2026-02-22 06:47:06

#	User	Runtime	Language	Date
1	Cristian Diaz	0.24 s	Ruby	2020-02-12 16:18:25

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Rust	2019-05-11 14:00:40
2	Bas Dirks	0.00 s	Rust	2022-07-11 08:10:20

#	User	Length	Language	Date
1	Song, Junhao	689	C	2020-10-21 14:25:44
2	Ivan Petrov	803	C	2019-07-22 08:05:58
3	Adam Stuart Richardson	829	C	2015-03-21 18:29:02
4	Colin MacGinnitie	943	C	2018-05-05 20:02:48
5	Alexander Bilde Pedersen	1328	C	2023-07-25 20:29:35
6	Bergur Snorrason	1880	C	2019-11-22 17:50:25
7	Cristian Diaz	2311	C	2020-02-15 22:03:11
8	Rajan Saini	2931	C	2020-02-23 00:15:20
9	Eyleifur Bjarkason	5915	C	2019-11-22 20:00:38

#	User	Length	Language	Date
1	Bas te Kolste	961	C#	2015-06-15 20:51:09
2	Hamdanil Rasyid	2050	C#	2025-01-08 21:40:56

#	User	Length	Language	Date
1	Teikn Smith	244	C++	2024-07-28 00:26:24
2	Mathias Gernez	352	C++	2025-09-04 20:04:13
3	Evan Michael Bailey	388	C++	2024-06-01 17:09:56
4	Josenildo Silva	433	C++	2017-04-10 02:55:51
5	Joshua Chan	542	C++	2015-09-10 06:56:05
6	Govind Venugopalan	547	C++	2017-04-10 12:49:04
7	Erik Aas	564	C++	2013-04-21 20:06:33
8	Truong Ngoc Khanh	565	C++	2016-02-23 02:06:26
9	Leonardo Blanger	571	C++	2021-01-27 22:57:18
10	Man Hin Jeffrey Hon	574	C++	2012-11-07 16:52:06

#	User	Length	Language	Date
1	Steven Cheng	732	Go	2020-06-03 18:02:59
2	Aleksander Jan Mistewicz	1014	Go	2019-05-12 12:23:57
3	Norbert Voelker	1351	Go	2024-06-05 20:53:14

#	User	Length	Language	Date
1	Steinar Simonnes	1311	Haskell	2025-07-15 07:32:15
2	Linus Eklund	2004	Haskell	2017-01-19 20:38:22
3	Brent Yorgey	2617	Haskell	2018-09-08 13:46:31

#	User	Length	Language	Date
1	Evan Dorundo	610	Java	2015-03-21 17:49:55
2	Duncan Page	662	Java	2019-11-25 23:53:12
3	Harrison Weigel	671	Java	2015-03-22 00:18:11
4	Charles Koenig	786	Java	2015-03-21 18:23:44
5	Brendan King	794	Java	2020-08-24 23:18:59
6	Stephen Royal	820	Java	2015-03-21 20:02:18
7	Joshua Kirstein	874	Java	2015-03-21 18:26:29
8	Suvinay Bothra	907	Java	2019-12-22 14:06:11
9	Roger Ballard	936	Java	2015-05-14 06:31:18
10	Joshua Linge	969	Java	2015-03-25 02:17:26

#	User	Length	Language	Date
1	Ursula Hebert-Johnson	2079	JavaScript (Node.js)	2020-02-20 23:23:53

#	User	Length	Language	Date
1	Jacob Huebner	1267	Kotlin	2020-03-20 07:05:17
2	Adam Rankin	1353	Kotlin	2023-10-01 05:20:32

#	User	Length	Language	Date
1	Daniel Strizhevsky	312	Python 2	2017-06-29 06:31:51
2	Oskar Haarklou Veileborg	338	Python 2	2019-10-24 12:48:22
3	Andreas Björklund	420	Python 2	2021-02-08 15:10:59
4	Johan Lyts	460	Python 2	2019-04-07 13:02:44
5	Jasper Lu	466	Python 2	2017-06-28 05:49:37
6	Hidden user	523	Python 2	2018-12-10 00:41:57
7	Kasper Borys	611	Python 2	2017-04-22 18:47:04
8	Christofer Ohlsson	732	Python 2	2015-04-30 07:07:53
9	Lars Åström	758	Python 2	2019-09-16 06:34:04
10	Felix Balthasar Berief	764	Python 2	2019-05-12 20:47:22

#	User	Length	Language	Date
1	Yong Mao	196	Python 3	2023-06-13 01:05:16
2	Kelly Dance	247	Python 3	2024-10-04 00:12:05
3	Clement Oh	269	Python 3	2023-09-29 09:12:26
4	Mattéo Delabre	282	Python 3	2022-11-19 22:03:09
5	Jeroen Op de Beek	287	Python 3	2024-09-22 16:18:59
6	Wilbert	334	Python 3	2026-02-20 16:14:17
7	alexandre dewilde	346	Python 3	2023-08-03 07:34:55
8	Sven Holtrop	364	Python 3	2019-10-12 15:19:20
9	Leah Le	403	Python 3	2024-04-06 03:09:07
10	USaskAdvanced12	416	Python 3	2023-02-25 22:24:35

#	User	Length	Language	Date
1	Cristian Diaz	432	Ruby	2020-02-12 18:14:55

#	User	Length	Language	Date
1	Bas Dirks	1119	Rust	2022-07-11 08:10:20
2	Hidden user	17301	Rust	2019-05-11 14:00:40

Solution running time distribution