Problem A
Card Trading — Problem Statistics

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Submissions	19494
Accepted submissions	3683
Submission ratio	18.89%
Authors	2371
Accepted authors	2165
Author ratio	91.31%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.02 s	C	2020-10-30 14:41:04
2	Hidden user	0.02 s	C	2025-04-19 14:00:06

#	User	Runtime	Language	Date
1	traxex	0.13 s	C#	2024-04-30 13:13:49
2	Anton Prasolov	0.19 s	C#	2021-03-16 13:03:01
3	Asbjørn Engås	0.20 s	C#	2021-03-10 18:32:41

#	User	Runtime	Language	Date
1	Øyvind Almli	0.01 s	C++	2021-02-27 00:50:29
2	Henry Xia	0.01 s	C++	2022-05-12 06:39:58
3	Hidden user	0.02 s	C++	2020-03-03 10:59:05
4	Frank Endriss	0.02 s	C++	2021-03-01 19:48:09
5	Zhang Jikun	0.02 s	C++	2022-07-14 17:50:42
6	Guk Yi Siong	0.02 s	C++	2024-02-18 14:31:42
7	Arnav Sastry	0.03 s	C++	2018-12-31 15:40:30
8	Hidden user	0.03 s	C++	2019-01-01 03:23:42
9	Marc Phua	0.03 s	C++	2020-06-20 19:03:52
10	Fidella Widjojo	0.03 s	C++	2021-02-03 20:38:59

#	User	Runtime	Language	Date
1	Norbert Voelker	0.18 s	Go	2021-09-20 00:45:20
2	Erlend Fonnes	0.20 s	Go	2021-02-07 10:29:03

#	User	Runtime	Language	Date
1	Brent Yorgey	0.34 s	Haskell	2022-02-24 11:43:19

#	User	Runtime	Language	Date
1	Clement Oh	0.11 s	Java	2022-07-27 14:05:28
2	Isaac Tay Zhi Xian	0.16 s	Java	2022-07-26 10:59:00
3	Wong Chee Hong	0.18 s	Java	2021-09-07 08:22:18
4	Øyvind Almli	0.18 s	Java	2022-02-03 21:40:01
5	Crystal Sharpe	0.21 s	Java	2021-01-18 00:05:23
6	Bryan Seah	0.23 s	Java	2021-09-07 11:01:21
7	Nicholas Russell Saerang	0.24 s	Java	2021-03-08 12:19:15
8	Hidden user	0.26 s	Java	2022-02-07 05:58:50
9	Guangyi Zhou	0.26 s	Java	2024-10-19 21:22:38
10	Bjørn Dons	0.29 s	Java	2023-01-22 20:12:18

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.16 s	JavaScript (SpiderMonkey)	2023-10-20 04:46:04
2	Christian Cederquist	0.58 s	JavaScript (SpiderMonkey)	2023-06-13 16:43:50

#	User	Runtime	Language	Date
1	Sondre Nilsen	0.90 s	Kotlin	2021-02-18 21:39:32
2	Lukas Miedema	0.95 s	Kotlin	2018-10-26 01:46:22
3	Benjamin Ye	1.14 s	Kotlin	2023-01-25 05:56:33
4	Erik Hystad	1.26 s	Kotlin	2021-02-11 16:24:00

#	User	Runtime	Language	Date
1	Maj Stenmark	0.11 s	Python 2	2018-03-30 22:43:52
2	Andreas Björklund	0.12 s	Python 2	2019-07-27 08:37:26
3	Lars Åström	0.12 s	Python 2	2019-08-04 17:45:58
4	Måns Magnusson	0.13 s	Python 2	2018-03-30 00:36:57
5	Victor Zheng	0.31 s	Python 2	2018-03-18 16:48:19
6	Olav Røthe Bakken	0.31 s	Python 2	2019-09-11 18:17:33

#	User	Runtime	Language	Date
1	Petr	0.10 s	Python 3	2025-02-18 17:55:42
2	Cheang Chi Yan Anthony	0.12 s	Python 3	2023-06-18 17:22:27
3	Marshall D Feng	0.13 s	Python 3	2025-01-04 23:52:35
4	Dominic Berzin Chua Way Gin	0.13 s	Python 3	2025-04-18 06:30:54
5	Mackinley He	0.14 s	Python 3	2022-07-02 11:54:13
6	Frank Feng	0.14 s	Python 3	2023-05-23 16:57:47
7	Jefferson Elbert Simões	0.14 s	Python 3	2024-11-14 16:24:22
8	LETIAN	0.14 s	Python 3	2025-02-12 13:02:48
9	Anikait Mundhra	0.15 s	Python 3	2023-02-02 19:30:17
10	Hidden user	0.15 s	Python 3	2023-07-03 13:16:52

#	User	Runtime	Language	Date
1	Thomas Feld	0.32 s	Ruby	2023-10-10 12:09:23

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.01 s	Rust	2024-12-02 17:30:09
2	Bas Dirks	0.02 s	Rust	2024-02-23 16:57:38
3	Egor Kulikov	0.02 s	Rust	2024-10-16 15:13:43
4	Ole Vik Lysne	0.03 s	Rust	2024-02-04 16:05:06

#	User	Length	Language	Date
1	Hidden user	848	C	2025-04-19 13:57:20
2	Bergur Snorrason	1853	C	2020-10-30 14:41:04

#	User	Length	Language	Date
1	traxex	783	C#	2024-04-30 13:13:49
2	Anton Prasolov	1966	C#	2021-03-07 11:09:43
3	Asbjørn Engås	1968	C#	2021-03-10 18:20:46

#	User	Length	Language	Date
1	Kjetil Berg	334	C++	2024-02-21 22:40:51
2	Dewita Sonya Tarabunga	515	C++	2019-11-28 08:54:34
3	Johan Wind	517	C++	2018-04-27 19:56:31
4	人外沙耶	567	C++	2023-12-20 07:34:51
5	Hyunjun Lee	583	C++	2023-05-10 19:16:00
6	Nixon Widjaja	618	C++	2023-02-07 14:43:48
7	Hidden user	646	C++	2021-09-10 08:49:16
8	Scratch Robotics	677	C++	2023-11-08 06:13:32
9	Magnus Lillerønning Aune	685	C++	2024-02-19 12:08:20
10	Ernest Ng Zi Xuan	698	C++	2024-02-16 03:26:27

#	User	Length	Language	Date
1	Norbert Voelker	1649	Go	2021-09-20 00:45:20
2	Erlend Fonnes	1734	Go	2021-02-07 10:29:03

#	User	Length	Language	Date
1	Brent Yorgey	8774	Haskell	2022-02-24 11:43:19

#	User	Length	Language	Date
1	daffa fathani adila	659	Java	2021-02-12 17:26:10
2	Hidden user	674	Java	2023-01-31 17:55:25
3	Huang Qiming	724	Java	2021-06-22 18:09:03
4	Lee Fang Jie, Jet	766	Java	2022-09-03 10:12:55
5	Low Wei Jian	854	Java	2023-09-15 07:23:51
6	Shielda Kamilia Hidajat	854	Java	2023-09-12 17:02:08
7	Danniel Alcantara	871	Java	2024-05-06 04:12:51
8	Lee Jia Yi	913	Java	2024-02-18 07:34:25
9	Wong Yung Jer	928	Java	2021-02-04 14:19:49
10	Low Ying Ting, Nicholas	933	Java	2025-02-14 12:15:42

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	338	JavaScript (SpiderMonkey)	2023-10-20 04:59:37
2	Christian Cederquist	1058	JavaScript (SpiderMonkey)	2023-06-13 16:43:50

#	User	Length	Language	Date
1	Benjamin Ye	571	Kotlin	2023-01-25 05:56:33
2	Sondre Nilsen	768	Kotlin	2021-02-18 21:42:28
3	Erik Hystad	1217	Kotlin	2021-02-11 16:24:00
4	Lukas Miedema	1283	Kotlin	2018-10-26 01:46:22

#	User	Length	Language	Date
1	Lars Åström	318	Python 2	2019-08-04 17:45:58
2	Andreas Björklund	353	Python 2	2019-07-27 08:37:26
3	Olav Røthe Bakken	410	Python 2	2019-09-11 18:17:33
4	Måns Magnusson	430	Python 2	2018-03-30 00:36:57
5	Victor Zheng	441	Python 2	2018-03-18 16:48:19
6	Maj Stenmark	479	Python 2	2018-03-30 22:43:52

#	User	Length	Language	Date
1	Hidden user	242	Python 3	2023-10-03 01:17:28
2	Anshuman Dash	253	Python 3	2023-01-31 05:09:02
3	Ahmed Chamseddine	263	Python 3	2025-06-18 16:26:21
4	Guan Yang Ze	341	Python 3	2021-02-07 07:28:05
5	Jefferson Elbert Simões	345	Python 3	2024-11-14 16:24:22
6	Christofer Ohlsson	363	Python 3	2022-10-17 18:08:46
7	FattyFats :3	396	Python 3	2021-02-05 09:23:28
8	Victor Zheng	396	Python 3	2018-03-17 23:44:15
9	Tom Luo	396	Python 3	2018-09-22 03:41:20
10	Christian Blumenthal	415	Python 3	2024-09-19 22:03:57

#	User	Length	Language	Date
1	Thomas Feld	132	Ruby	2023-10-10 12:12:21

#	User	Length	Language	Date
1	Ole Vik Lysne	1355	Rust	2024-02-04 16:11:38
2	Bas Dirks	2029	Rust	2024-02-23 16:57:38
3	Vincent Lagerros	17401	Rust	2024-12-02 17:31:27
4	Egor Kulikov	22556	Rust	2024-10-16 15:13:43

Solution running time distribution