Problem A
Doubleplusgood — Problem Statistics

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Submissions	1208
Accepted submissions	661
Submission ratio	54.72%
Authors	564
Full solves [?]	512
Full solve Ratio	90.78%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.05 s	C	2020-04-13 15:32:49
2	Sambit Palit	0.08 s	C	2020-10-30 23:49:45
3	Ivan Petrov	0.39 s	C	2019-03-22 08:53:21
4	Ioannis Br	0.46 s	C	2023-10-01 20:38:55

#	User	Runtime	Language	Date
1	Mikael Fiala-Lundström	0.24 s	C#	2022-02-09 00:00:29
2	Caden Waters	0.31 s	C#	2019-03-23 21:25:22
3	Esty Crow	0.38 s	C#	2023-02-23 01:02:17
4	Anthony Ye	0.38 s	C#	2023-02-26 18:32:45
5	Casper Rødgaard	0.59 s	C#	2020-04-30 20:09:06

#	User	Runtime	Language	Date
1	Benjamin Qi	0.01 s	C++	2019-03-16 17:08:59
2	Viraj Maddur	0.01 s	C++	2019-03-16 17:27:10
3	Bryan Enrique González Vélez	0.01 s	C++	2019-03-16 18:46:02
4	Andrew Stelter	0.01 s	C++	2019-03-16 20:50:49
5	Hidden user	0.01 s	C++	2019-03-27 15:54:03
6	Bay Wei Heng	0.01 s	C++	2020-02-10 09:16:06
7	Kyle Chui	0.01 s	C++	2021-10-17 22:01:14
8	Yuesong Zou	0.01 s	C++	2022-01-18 00:24:42
9	Blake Celestian	0.01 s	C++	2022-02-22 05:26:21
10	Tan Yi Long	0.01 s	C++	2024-01-08 09:34:48

#	User	Runtime	Language	Date
1	Hidden user	0.36 s	Common Lisp	2019-07-25 18:41:50

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.51 s	F#	2023-03-19 10:57:55

#	User	Runtime	Language	Date
1	Norbert Voelker	0.11 s	Go	2021-08-20 18:17:59

#	User	Runtime	Language	Date
1	Hidden user	0.03 s	Haskell	2021-11-13 13:36:41
2	Steinar Simonnes	0.07 s	Haskell	2024-05-01 13:36:56
3	Brent Yorgey	1.61 s	Haskell	2019-04-20 19:40:11

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.08 s	Java	2022-11-25 22:43:32
2	Emil Bak-Møller	0.12 s	Java	2019-10-28 13:35:54
3	Simon Hallefält	0.14 s	Java	2023-02-04 16:13:19
4	Benjamin Reidys	0.15 s	Java	2019-03-16 23:44:18
5	Graeme Zinck	0.16 s	Java	2019-03-16 20:03:26
6	Alyssa Lawton	0.16 s	Java	2022-09-27 04:06:51
7	William Quiroga	0.18 s	Java	2019-03-19 22:08:01
8	Steven Cheng	0.18 s	Java	2020-04-13 21:26:05
9	Suhas T. Nagar	0.18 s	Java	2022-05-04 08:36:39
10	Ho Lyun Jeong	0.19 s	Java	2021-10-17 21:34:17

#	User	Runtime	Language	Date
1	Minh Trang Nguyen	0.25 s	JavaScript (Node.js)	2026-01-09 22:16:01
2	August Danell Håkansson	0.33 s	JavaScript (Node.js)	2023-07-18 09:21:26
3	ChaosOp	0.59 s	JavaScript (Node.js)	2021-04-11 10:26:24

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.25 s	JavaScript (SpiderMonkey)	2023-05-26 07:46:50
2	Bjørn Chr. Soltvedt	1.47 s	JavaScript (SpiderMonkey)	2019-03-17 14:55:35

#	User	Runtime	Language	Date
1	Timothy Gaede	0.86 s	Julia	2024-05-15 05:33:10

#	User	Runtime	Language	Date
1	Adam Rankin	0.42 s	Kotlin	2023-09-20 05:14:39
2	Hidden user	0.58 s	Kotlin	2019-12-04 08:20:01

#	User	Runtime	Language	Date
1	Daniel Wolff	0.06 s	Python 2	2019-03-16 19:11:02
2	Finn Lidbetter	0.06 s	Python 2	2019-03-17 17:21:19
3	Jesper Öqvist	0.06 s	Python 2	2019-08-15 21:36:00
4	Maj Stenmark	0.06 s	Python 2	2019-09-17 17:27:35
5	Lars Åström	0.09 s	Python 2	2019-05-19 19:48:42
6	Jonatan Nilsson	0.11 s	Python 2	2019-09-17 16:54:06
7	Andreas Björklund	0.12 s	Python 2	2019-06-27 18:00:48
8	Vương Thiện Trung	0.14 s	Python 2	2019-04-28 02:46:46
9	Anshil Gandhi	0.14 s	Python 2	2019-11-14 19:33:12
10	Yanmarshus Bachtiar	0.14 s	Python 2	2020-09-09 14:37:06

#	User	Runtime	Language	Date
1	Nick Wu	0.05 s	Python 3	2023-06-29 08:56:36
2	Naveen Kumar S	0.05 s	Python 3	2025-11-11 17:38:45
3	Mukul Dhurkunde	0.05 s	Python 3	2026-01-14 21:38:19
4	Hidden user	0.05 s	Python 3	2026-02-13 21:20:28
5	Markus Krabbe Larsen	0.06 s	Python 3	2022-01-14 13:18:47
6	geedbee	0.07 s	Python 3	2025-10-22 07:15:16
7	Noah Hessen Bjerke	0.07 s	Python 3	2025-11-27 13:18:08
8	Johan Sannemo	0.08 s	Python 3	2021-10-25 23:19:27
9	Miorel Palii	0.08 s	Python 3	2022-03-07 11:56:54
10	Lawry Sorenson	0.08 s	Python 3	2025-02-22 00:48:04

#	User	Runtime	Language	Date
1	Thomas Feld	1.03 s	Ruby	2023-05-03 10:56:41

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.00 s	Rust	2024-08-25 02:41:11
2	Ross Canning	0.01 s	Rust	2019-06-10 02:26:13
3	Pahlevi Fikri Auliya	0.05 s	Rust	2021-02-27 23:29:00
4	Dan Yang	0.08 s	Rust	2019-03-26 01:13:29
5	Niklas Sandén	0.13 s	Rust	2023-02-04 12:34:14
6	Bas Dirks	0.14 s	Rust	2022-02-05 13:09:49

#	User	Length	Language	Date
1	Bergur Snorrason	1939	C	2020-04-13 15:32:49
2	Ioannis Br	2539	C	2023-10-01 20:40:45
3	Sambit Palit	3061	C	2020-10-30 23:49:45
4	Ivan Petrov	3784	C	2019-03-22 08:53:21

#	User	Length	Language	Date
1	Esty Crow	738	C#	2023-02-23 01:24:48
2	Anthony Ye	817	C#	2023-02-26 18:32:45
3	Caden Waters	2206	C#	2019-03-23 21:25:22
4	Mikael Fiala-Lundström	2248	C#	2022-02-09 00:00:29
5	Casper Rødgaard	2655	C#	2020-04-30 20:09:06

#	User	Length	Language	Date
1	Jason Cannon	484	C++	2019-12-10 16:54:24
2	Michael Pfeifer	537	C++	2019-03-16 17:15:50
3	Markus Mathiasen	546	C++	2022-01-20 13:30:16
4	Ritwin Narra	559	C++	2025-10-29 02:41:12
5	Alexander Skidanov	581	C++	2024-11-18 19:32:47
6	Armen Andreasyan	588	C++	2019-03-20 17:40:18
7	Igor Silva	604	C++	2019-03-17 00:22:58
8	Víctor Hugo Meirelles Silva	607	C++	2019-03-16 21:13:44
9	Rodrigo Weigert	619	C++	2019-03-16 17:25:22
10	Jerry Zhu	629	C++	2019-03-16 18:22:07

#	User	Length	Language	Date
1	Hidden user	1009	Common Lisp	2019-07-25 18:31:55

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	2012	F#	2023-03-19 10:57:55

#	User	Length	Language	Date
1	Norbert Voelker	1101	Go	2021-08-20 18:17:59

#	User	Length	Language	Date
1	Steinar Simonnes	798	Haskell	2024-05-01 13:36:56
2	Brent Yorgey	902	Haskell	2019-04-20 19:40:11
3	Hidden user	13513	Haskell	2021-11-13 13:36:41

#	User	Length	Language	Date
1	Andreas Guldborg Hansen	702	Java	2021-12-05 15:49:37
2	Sam Huynh	774	Java	2021-07-29 12:16:26
3	Caleb Reath	898	Java	2019-03-16 18:10:56
4	Benjamin Reidys	911	Java	2019-03-16 18:34:28
5	Suhas T. Nagar	914	Java	2022-05-04 08:36:39
6	Daniel Sutantyo	919	Java	2021-07-30 11:52:54
7	Jazz Loffredo	926	Java	2020-03-28 15:34:47
8	Markus Bao	946	Java	2024-01-06 12:48:31
9	Emilie Hyslop	997	Java	2021-07-30 12:40:37
10	Simon Hallefält	1012	Java	2023-02-04 16:13:19

#	User	Length	Language	Date
1	Minh Trang Nguyen	938	JavaScript (Node.js)	2026-01-09 22:16:01
2	ChaosOp	1050	JavaScript (Node.js)	2021-04-11 10:26:24
3	August Danell Håkansson	1374	JavaScript (Node.js)	2023-07-18 09:21:26

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	543	JavaScript (SpiderMonkey)	2023-05-26 07:46:50
2	Bjørn Chr. Soltvedt	24630	JavaScript (SpiderMonkey)	2019-03-17 14:55:35

#	User	Length	Language	Date
1	Timothy Gaede	652	Julia	2024-05-15 05:33:10

#	User	Length	Language	Date
1	Adam Rankin	685	Kotlin	2023-09-20 05:14:39
2	Hidden user	695	Kotlin	2019-12-04 08:20:01

#	User	Length	Language	Date
1	Thomas Feld	173	Python 2	2019-10-04 17:24:43
2	Kuan Wei Heng	250	Python 2	2019-05-07 13:47:07
3	Lars Åström	287	Python 2	2019-05-19 19:48:42
4	Andreas Björklund	299	Python 2	2019-06-27 18:00:48
5	Maj Stenmark	312	Python 2	2019-09-17 17:27:35
6	Jonatan Nilsson	318	Python 2	2019-09-17 16:54:06
7	Daniel Wolff	320	Python 2	2019-03-16 19:11:02
8	Anshil Gandhi	330	Python 2	2019-11-14 19:33:12
9	Jesper Öqvist	363	Python 2	2019-08-15 21:36:00
10	Saeed Askari	427	Python 2	2019-03-16 18:38:06

#	User	Length	Language	Date
1	Benjamin Z White	148	Python 3	2023-05-12 10:19:21
2	Peter Stauder	161	Python 3	2022-08-20 15:11:53
3	Dries Wedda	208	Python 3	2023-05-09 00:10:28
4	Hidden user	222	Python 3	2021-11-24 16:33:17
5	Ahmed Chamseddine	232	Python 3	2024-12-19 00:10:23
6	Tai Tze Kin	236	Python 3	2024-05-04 13:53:14
7	Jonathan Dastrup	238	Python 3	2024-10-04 23:02:57
8	Kelly Dance	239	Python 3	2024-10-04 05:58:43
9	Noah Hessen Bjerke	240	Python 3	2025-11-27 13:18:08
10	Hidden user	249	Python 3	2022-12-01 18:13:45

#	User	Length	Language	Date
1	Thomas Feld	115	Ruby	2023-05-03 10:56:41

#	User	Length	Language	Date
1	Vincent Lagerros	767	Rust	2024-08-25 01:56:25
2	Dan Yang	1161	Rust	2019-03-26 01:13:29
3	Bas Dirks	1419	Rust	2022-02-05 13:09:49
4	Pahlevi Fikri Auliya	2270	Rust	2021-02-27 23:29:00
5	Ross Canning	3278	Rust	2019-06-10 02:26:13
6	Niklas Sandén	26326	Rust	2023-02-04 12:34:14

Solution running time distribution