Problem A
Playfair Cipher — Problem Statistics

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Submissions	1444
Accepted submissions	583
Submission ratio	40.37%
Authors	606
Accepted authors	516
Author ratio	85.15%

#	User	Runtime	Language	Date
1	Seth Carter	0.00 s	C	2018-02-21 00:55:30
2	Ivan Petrov	0.00 s	C	2019-05-29 13:51:28
3	amineNouabi	0.00 s	C	2021-11-13 07:07:34
4	Mikael K Eriksson	0.00 s	C	2022-05-03 11:45:57
5	Hidden user	0.00 s	C	2022-05-30 21:06:13
6	Scott Sherlock	0.00 s	C	2022-09-05 20:28:28
7	daimiao chen	0.00 s	C	2024-03-16 18:53:35

#	User	Runtime	Language	Date
1	Dan Wolff	0.02 s	C#	2018-10-11 17:23:25
2	Mikael Fiala-Lundström	0.03 s	C#	2021-06-07 03:22:21
3	Axel Strömberg	0.03 s	C#	2021-11-15 15:29:52
4	Joshua Blüming	0.03 s	C#	2022-07-31 23:44:00
5	Bartosz Starczewski	0.04 s	C#	2019-01-18 12:20:10
6	Jon Skranes	0.04 s	C#	2022-01-18 21:26:14
7	PumpedByFranck Tm	0.06 s	C#	2025-06-20 19:51:54
8	Matias Suarez	0.06 s	C#	2025-06-20 22:42:23
9	Fredric Bergman	0.07 s	C#	2024-02-21 01:19:43

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.04 s	F#	2023-04-06 10:01:59
2	Kristoffer Borgstrøm	0.06 s	F#	2022-06-15 01:04:31

#	User	Runtime	Language	Date
1	Justin Bak	0.07 s	Go	2019-01-05 08:32:56
2	Marcin Dudek	0.07 s	Go	2019-01-16 10:30:18
3	Norbert Voelker	0.08 s	Go	2021-08-21 00:55:17

#	User	Runtime	Language	Date
1	Brent Yorgey	0.00 s	Haskell	2018-01-07 04:37:48
2	Sebastian Banert	0.00 s	Haskell	2023-04-16 17:47:29
3	Steinar Simonnes	0.00 s	Haskell	2024-09-29 16:55:02
4	Hidden user	0.01 s	Haskell	2019-11-04 15:46:26
5	Shing Tak Lam	0.01 s	Haskell	2021-03-12 09:04:22
6	Scott Dauer	0.01 s	Haskell	2022-01-08 19:46:55

#	User	Runtime	Language	Date
1	Taras Romanyuk	0.04 s	Java	2024-10-02 12:19:11
2	Hans Gylling	0.05 s	Java	2009-10-14 22:10:17
3	Graeme Zinck	0.05 s	Java	2018-10-12 01:35:04
4	Steven Cheng	0.06 s	Java	2018-05-23 18:58:31
5	Ashu Yadav	0.06 s	Java	2018-06-26 12:30:08
6	Aafia Ahmad	0.07 s	Java	2018-10-13 02:02:33
7	Ben Cobb	0.07 s	Java	2023-11-17 20:49:14
8	Ben Douglass	0.08 s	Java	2018-07-01 18:11:42
9	Samuel Klingström	0.08 s	Java	2018-11-08 22:53:55
10	Justin Turner	0.09 s	Java	2018-02-06 18:39:32

#	User	Runtime	Language	Date
1	Christopher Churchwell	0.05 s	JavaScript (Node.js)	2023-11-30 00:02:15
2	Angelo Gazzola	0.06 s	JavaScript (Node.js)	2024-11-10 17:04:52
3	Oliver Larsson	0.12 s	JavaScript (Node.js)	2022-10-14 15:58:18

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2017-11-17 22:59:31
2	Christian Cederquist	0.03 s	JavaScript (SpiderMonkey)	2023-06-01 22:06:04

#	User	Runtime	Language	Date
1	Timothy Gaede	0.87 s	Julia	2024-10-02 13:37:46

#	User	Runtime	Language	Date
1	Hidden user	0.16 s	Kotlin	2020-03-08 01:06:24
2	Benjamin Laurence Erickson	0.19 s	Kotlin	2023-04-07 17:13:21
3	Simon Weidmann	0.21 s	Kotlin	2023-06-08 11:18:46
4	Adam Rankin	0.21 s	Kotlin	2023-09-13 01:36:25
5	Jesper Bech Christensen	0.23 s	Kotlin	2023-10-03 17:11:04
6	Neil Harmon	0.25 s	Kotlin	2019-10-30 15:15:54
7	Ola Sundell	0.25 s	Kotlin	2019-11-11 11:55:00

#	User	Runtime	Language	Date
1	Jacob Elliott	0.03 s	Python 2	2018-02-21 02:57:40
2	João Pedro Alvito	0.03 s	Python 2	2018-03-31 03:05:55
3	Maj Stenmark	0.03 s	Python 2	2018-08-19 20:23:38
4	Jesper Öqvist	0.03 s	Python 2	2018-11-07 23:53:32
5	Andreas Björklund	0.03 s	Python 2	2019-04-07 10:22:55
6	Riko Jacob	0.03 s	Python 2	2019-04-18 17:52:03
7	Yanmarshus Bachtiar	0.03 s	Python 2	2020-10-18 06:08:53
8	Thomas Feld	0.04 s	Python 2	2019-10-30 16:03:04
9	Johan Lyts	0.04 s	Python 2	2020-08-08 14:42:56

#	User	Runtime	Language	Date
1	Win Htet Aung	0.02 s	Python 3	2018-01-13 12:52:36
2	Christian	0.02 s	Python 3	2018-02-04 22:17:58
3	Hakan Celik	0.02 s	Python 3	2018-04-18 12:15:55
4	Carina Nilsson	0.02 s	Python 3	2018-05-03 11:16:34
5	Hidden user	0.02 s	Python 3	2018-05-08 18:55:40
6	Kasra Ghodsi	0.02 s	Python 3	2018-05-16 15:45:43
7	Anatole HAGBE	0.02 s	Python 3	2018-09-26 00:26:24
8	Karl Hvarregaard Mose	0.02 s	Python 3	2018-10-04 00:20:06
9	Hidden user	0.02 s	Python 3	2018-10-06 12:59:40
10	Jake Crouch	0.02 s	Python 3	2018-10-13 01:58:03

#	User	Runtime	Language	Date
1	Macdara mac an tSionnaigh	0.05 s	Ruby	2019-11-04 21:47:14
2	Adam Hellberg	0.39 s	Ruby	2019-09-26 11:26:54

#	User	Runtime	Language	Date
1	David Schalin	0.00 s	Rust	2021-11-02 14:16:00
2	Bas Dirks	0.00 s	Rust	2022-02-21 17:44:21
3	Christian Cattai	0.00 s	Rust	2022-05-28 16:10:02
4	Adam Gausmann	0.00 s	Rust	2022-08-14 21:05:25
5	Jonathan Cederlund	0.00 s	Rust	2023-04-25 14:01:11
6	Artur Khuziakhmetov	0.00 s	Rust	2023-08-05 10:45:35
7	Petter Hansson	0.00 s	Rust	2023-09-23 23:15:51
8	Ming Kang	0.00 s	Rust	2025-06-04 09:02:46

#	User	Length	Language	Date
1	Ivan Petrov	1486	C	2019-05-29 13:51:28
2	Mikael K Eriksson	1588	C	2022-05-03 11:45:57
3	Hidden user	1597	C	2022-05-30 21:06:13
4	daimiao chen	2763	C	2024-03-16 18:53:35
5	Seth Carter	2899	C	2018-02-21 00:55:30
6	amineNouabi	3085	C	2021-11-13 07:07:34
7	Scott Sherlock	8925	C	2022-09-05 20:28:28

#	User	Length	Language	Date
1	Matias Suarez	3080	C#	2025-06-20 22:42:23
2	PumpedByFranck Tm	3696	C#	2025-06-20 19:51:54
3	Jon Skranes	4881	C#	2022-01-18 21:26:14
4	Joshua Blüming	5487	C#	2022-07-31 23:44:00
5	Dan Wolff	5545	C#	2018-10-11 17:23:25
6	Mikael Fiala-Lundström	5688	C#	2021-06-07 03:22:21
7	Axel Strömberg	5692	C#	2021-11-15 15:29:52
8	Bartosz Starczewski	6240	C#	2019-01-18 12:20:10
9	Fredric Bergman	7193	C#	2024-02-21 01:19:43

#	User	Length	Language	Date
1	Hidden user	1114	C++	2020-05-07 19:38:57
2	Josenildo Silva	1128	C++	2018-06-23 15:16:45
3	Markus Mathiasen	1179	C++	2023-08-29 16:55:05
4	林孜謙	1201	C++	2023-05-05 03:39:50
5	Hidden user	1299	C++	2024-11-20 17:37:40
6	Hidden user	1309	C++	2024-07-04 01:37:49
7	人外沙耶	1353	C++	2021-03-03 09:48:19
8	Tùng Hoàng Lâm	1404	C++	2024-12-06 11:21:36
9	speedcubing	1422	C++	2023-12-22 14:46:46
10	Vladimir Folunin	1432	C++	2022-01-27 19:09:16

#	User	Length	Language	Date
1	Kristoffer Borgstrøm	1652	F#	2022-06-15 01:04:31
2	Jacob Harris Cryer Kragh	2454	F#	2023-04-06 10:01:59

#	User	Length	Language	Date
1	Norbert Voelker	1652	Go	2021-08-21 01:00:28
2	Justin Bak	1774	Go	2019-01-05 08:32:56
3	Marcin Dudek	1980	Go	2019-01-16 10:30:18

#	User	Length	Language	Date
1	Sebastian Banert	1239	Haskell	2023-04-16 17:47:29
2	Shing Tak Lam	1374	Haskell	2021-03-12 09:04:22
3	Brent Yorgey	1612	Haskell	2018-01-07 04:37:48
4	Steinar Simonnes	1801	Haskell	2024-09-29 16:55:02
5	Scott Dauer	2737	Haskell	2022-01-08 19:46:55
6	Hidden user	10409	Haskell	2019-11-04 15:46:26

#	User	Length	Language	Date
1	Doug Goodman	1399	Java	2018-03-20 21:10:57
2	Markus Bao	1871	Java	2024-01-08 05:20:08
3	Brennan Cleland	1874	Java	2022-10-20 22:36:31
4	Selena Yue Zhang	1983	Java	2018-09-29 02:26:12
5	Nguyen Do	2077	Java	2019-01-02 14:57:59
6	Hidden user	2322	Java	2024-10-10 17:51:15
7	Carson Wilber	2363	Java	2018-10-20 23:39:50
8	Justin Turner	2383	Java	2018-02-06 18:39:32
9	Samuel Klingström	2432	Java	2018-11-08 22:53:55
10	Crystal Sharpe	2506	Java	2020-02-21 06:15:50

#	User	Length	Language	Date
1	Christopher Churchwell	1720	JavaScript (Node.js)	2023-11-30 00:02:15
2	Oliver Larsson	2262	JavaScript (Node.js)	2022-10-14 15:58:18
3	Angelo Gazzola	2403	JavaScript (Node.js)	2024-11-10 17:04:52

#	User	Length	Language	Date
1	Christian Cederquist	1221	JavaScript (SpiderMonkey)	2023-06-01 22:06:04
2	Bjørn Chr. Soltvedt	1618	JavaScript (SpiderMonkey)	2017-11-17 22:59:31

#	User	Length	Language	Date
1	Timothy Gaede	2315	Julia	2024-10-02 13:37:46

#	User	Length	Language	Date
1	Jesper Bech Christensen	1106	Kotlin	2023-10-03 17:11:04
2	Benjamin Laurence Erickson	1367	Kotlin	2023-04-07 17:13:21
3	Simon Weidmann	1452	Kotlin	2023-06-08 11:18:46
4	Hidden user	2010	Kotlin	2020-03-08 01:06:24
5	Adam Rankin	2215	Kotlin	2023-09-13 01:36:25
6	Neil Harmon	2617	Kotlin	2019-10-30 15:15:54
7	Ola Sundell	4264	Kotlin	2019-11-11 11:55:00

#	User	Length	Language	Date
1	Thomas Feld	453	Python 2	2019-10-30 16:03:04
2	Jesper Öqvist	866	Python 2	2018-11-07 23:53:32
3	Riko Jacob	957	Python 2	2019-04-18 17:52:03
4	Andreas Björklund	970	Python 2	2019-04-07 10:22:55
5	João Pedro Alvito	973	Python 2	2018-03-31 03:05:55
6	Johan Lyts	1282	Python 2	2020-08-08 14:42:56
7	Yanmarshus Bachtiar	1335	Python 2	2020-10-18 06:08:53
8	Maj Stenmark	1431	Python 2	2018-08-19 20:23:38
9	Jacob Elliott	1679	Python 2	2018-02-21 02:57:40

#	User	Length	Language	Date
1	Benjamin Z White	468	Python 3	2023-07-07 15:22:22
2	Ahmed Chamseddine	553	Python 3	2025-06-23 15:35:53
3	Jason Cannon	708	Python 3	2019-12-05 03:31:38
4	Oskar Haarklou Veileborg	720	Python 3	2020-03-19 08:51:51
5	Hu Yijie	750	Python 3	2022-04-19 15:23:27
6	Hidden user	758	Python 3	2023-11-30 09:27:39
7	Teikn Smith	772	Python 3	2022-07-06 00:19:20
8	Hidden user	789	Python 3	2019-09-19 07:25:59
9	이정섭	807	Python 3	2022-07-23 07:42:21
10	Iman Khodadi	823	Python 3	2024-09-13 13:35:37

#	User	Length	Language	Date
1	Macdara mac an tSionnaigh	1244	Ruby	2019-11-04 21:47:14
2	Adam Hellberg	1320	Ruby	2019-09-26 11:26:54

#	User	Length	Language	Date
1	Artur Khuziakhmetov	987	Rust	2023-08-05 10:45:35
2	Adam Gausmann	2011	Rust	2022-08-14 21:05:25
3	Bas Dirks	2028	Rust	2022-02-21 17:44:21
4	Christian Cattai	2046	Rust	2022-05-28 16:10:02
5	Petter Hansson	3121	Rust	2023-09-23 23:15:51
6	Jonathan Cederlund	3497	Rust	2023-04-25 14:01:11
7	Ming Kang	3987	Rust	2025-06-04 09:02:46
8	David Schalin	8957	Rust	2021-11-02 14:16:00

Solution running time distribution