Problem I
Number Sets (Hard) — Problem Statistics

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Submissions	1355
Accepted submissions	392
Submission ratio	28.93%
Authors	345
Full solves [?]	238
Full solve Ratio	68.99%

#	User	Runtime	Language	Date
1	Jesper Öqvist	0.15 s	C	2018-06-10 13:41:12
2	Isaac Saffold	0.15 s	C	2018-12-22 10:48:16
3	Ivan Petrov	0.18 s	C	2019-08-14 13:50:47
4	Alexander Bilde Pedersen	0.20 s	C	2025-03-06 19:29:50

#	User	Runtime	Language	Date
1	Per Persson	0.06 s	C++	2017-04-27 08:36:53
2	Dmitry Lyubshin	0.08 s	C++	2018-05-04 14:57:17
3	Lin Lee	0.08 s	C++	2022-03-27 07:54:37
4	Chase Hinesman	0.09 s	C++	2018-02-28 07:41:59
5	Amr Khedr	0.09 s	C++	2018-04-03 15:42:14
6	Andrew Polizzotto	0.09 s	C++	2024-10-01 00:10:34
7	Johan Sannemo	0.10 s	C++	2012-05-16 18:16:17
8	Oskar Werkelin Ahlin	0.10 s	C++	2012-05-17 23:31:43
9	Bjarki Ágúst Guðmundsson	0.10 s	C++	2014-05-01 00:16:58
10	Leif Eriksson	0.10 s	C++	2018-12-21 20:38:53

#	User	Runtime	Language	Date
1	Nathan Lee	0.29 s	Go	2025-11-24 13:42:26

#	User	Runtime	Language	Date
1	Bjørn Dons	0.27 s	Java	2018-10-31 01:57:55
2	Simon Klein	0.33 s	Java	2012-05-18 16:21:46
3	Jan Štola	0.33 s	Java	2015-03-16 17:34:49
4	Brent Yorgey	0.37 s	Java	2019-01-05 23:03:16
5	Marco Vincenzo Karaan	0.38 s	Java	2016-04-30 09:47:15
6	Erik Odenman	0.40 s	Java	2012-05-17 16:56:10
7	Martijn Muijsers	0.43 s	Java	2017-03-22 20:35:14
8	Michael Sullivan	0.44 s	Java	2016-03-18 20:45:01
9	Micah Stairs	0.44 s	Java	2016-09-03 16:03:39
10	Mehdi Maick	0.45 s	Java	2016-08-13 18:28:38

#	User	Runtime	Language	Date
1	Hidden user	0.64 s	Kotlin	2020-04-13 03:20:23
2	Jonathan Soo	0.76 s	Kotlin	2020-03-21 15:16:23

#	User	Runtime	Language	Date
1	Andreas Björklund	0.44 s	Python 2	2019-08-16 10:59:17
2	Jordan James	0.46 s	Python 2	2018-02-08 16:08:32
3	Sigurður Jens Albertsson	0.74 s	Python 2	2017-11-23 00:28:05
4	Hidden user	0.80 s	Python 2	2018-02-15 12:24:27
5	Hidden user	0.94 s	Python 2	2017-05-12 15:13:09

#	User	Runtime	Language	Date
1	Vu Minh Hieu	0.53 s	Python 3	2024-05-29 21:04:37
2	Isaac Lee	0.78 s	Python 3	2020-05-24 06:56:50
3	Alex Zhang	0.84 s	Python 3	2025-04-25 23:06:59
4	Hidden user	0.85 s	Python 3	2023-01-24 09:15:59
5	Nicholas Russell Saerang	0.94 s	Python 3	2023-07-12 07:07:17

#	User	Runtime	Language	Date
1	Atli Fannar Franklín	0.36 s	Rust	2022-01-16 11:59:34
2	Artur Khuziakhmetov	0.42 s	Rust	2025-11-16 15:44:59
3	Mckinley Xie	0.58 s	Rust	2025-04-25 22:52:22

#	User	Length	Language	Date
1	Ivan Petrov	1531	C	2019-08-14 13:50:47
2	Jesper Öqvist	2153	C	2018-06-10 13:41:12
3	Alexander Bilde Pedersen	2334	C	2025-03-06 19:29:50
4	Isaac Saffold	3800	C	2018-12-22 10:48:16

#	User	Length	Language	Date
1	Kévin Dubrulle	674	C++	2024-11-22 16:23:01
2	Yeung Man Tsung	836	C++	2023-01-04 12:38:35
3	Hidden user	918	C++	2024-04-02 16:50:39
4	William Gan	921	C++	2018-01-30 08:09:51
5	ณัฐวุฒิ เจนศักดิ์ดา	973	C++	2024-01-02 01:05:18
6	João Sobral	981	C++	2020-01-22 01:02:34
7	Davi Bonfim Moraes Morant de Holanda	1016	C++	2021-10-03 09:30:49
8	Jordi Rodríguez Manso	1033	C++	2018-08-21 09:56:15
9	Zijian Zhou	1034	C++	2021-03-22 04:01:50
10	Tautvydas Jasiūnas	1062	C++	2020-11-21 16:42:34

#	User	Length	Language	Date
1	Nathan Lee	2323	Go	2025-11-24 13:42:26

#	User	Length	Language	Date
1	Hidden user	1471	Java	2017-02-17 01:19:39
2	Frank Ruskey	1980	Java	2017-02-28 21:02:51
3	Jessica Fang	2028	Java	2017-02-17 05:19:35
4	Hidden user	2140	Java	2017-02-17 04:46:12
5	Crystal Sharpe	2182	Java	2021-05-25 04:27:59
6	Marco Vincenzo Karaan	2197	Java	2016-04-30 09:47:15
7	Intothe Unknown	2292	Java	2023-08-14 11:07:18
8	Charize Cajuday	2292	Java	2023-08-16 19:03:42
9	Martijn Muijsers	2343	Java	2017-03-22 20:35:14
10	Michael Brenan	2515	Java	2019-11-02 02:21:05

#	User	Length	Language	Date
1	Hidden user	1955	Kotlin	2020-04-13 03:20:23
2	Jonathan Soo	9008	Kotlin	2020-03-21 15:16:23

#	User	Length	Language	Date
1	Hidden user	903	Python 2	2018-02-15 12:24:27
2	Andreas Björklund	927	Python 2	2019-08-16 10:57:50
3	Hidden user	1320	Python 2	2017-05-12 15:13:09
4	Sigurður Jens Albertsson	1344	Python 2	2017-11-23 00:28:05
5	Jordan James	1590	Python 2	2018-02-08 16:08:32

#	User	Length	Language	Date
1	Nicholas Russell Saerang	1201	Python 3	2023-07-12 07:07:17
2	Vu Minh Hieu	1438	Python 3	2024-05-29 21:04:37
3	Isaac Lee	2330	Python 3	2020-05-24 06:56:50
4	Hidden user	4448	Python 3	2023-01-24 09:15:59
5	Alex Zhang	14330	Python 3	2025-04-25 23:06:59

#	User	Length	Language	Date
1	Mckinley Xie	3182	Rust	2025-04-25 22:52:22
2	Artur Khuziakhmetov	3630	Rust	2025-11-16 15:44:59
3	Atli Fannar Franklín	23002	Rust	2022-01-16 11:59:34

Solution running time distribution