Problem A
Tautology — Problem Statistics

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Submissions	2674
Accepted submissions	1220
Submission ratio	45.62%
Authors	976
Full solves [?]	903
Full solve Ratio	92.52%

#	User	Runtime	Language	Date
1	Simon Ståhlberg	0.02 s	C#	2014-04-14 16:35:56
2	Sarah Tibell	0.05 s	C#	2024-12-03 16:51:04

#	User	Runtime	Language	Date
1	Morten Clausen	0.04 s	F#	2020-12-28 21:58:00

#	User	Runtime	Language	Date
1	Aleksander Jan Mistewicz	0.02 s	Go	2019-04-22 18:16:10
2	Eidan Cohen	0.02 s	Go	2023-02-10 16:02:26
3	Hidden user	0.07 s	Go	2019-04-23 13:35:25
4	Johan Fogelström	0.08 s	Go	2014-11-12 13:43:15
5	Norbert Voelker	0.08 s	Go	2021-04-01 16:50:14

#	User	Runtime	Language	Date
1	Viktor Mattsson	0.05 s	Java	2014-11-09 16:33:30
2	Daniel Hollsten	0.05 s	Java	2014-11-10 10:38:03
3	Felix Grape	0.05 s	Java	2016-11-03 14:18:18
4	Björn Holm	0.06 s	Java	2014-10-23 18:36:02
5	Alexander Gomez	0.06 s	Java	2014-11-11 20:32:27
6	Carl Eriksson	0.06 s	Java	2014-11-12 00:00:43
7	Thomas Sjöholm	0.06 s	Java	2014-11-12 12:07:11
8	Tom Johansson	0.06 s	Java	2016-11-05 04:11:35
9	Isak Jägberg	0.06 s	Java	2016-11-06 13:00:55
10	Janne Selkälä	0.06 s	Java	2016-11-06 13:41:30

#	User	Runtime	Language	Date
1	Christopher Churchwell	0.14 s	JavaScript (Node.js)	2023-11-29 16:14:37

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	JavaScript (SpiderMonkey)	2014-10-28 11:10:04
2	Hidden user	0.01 s	JavaScript (SpiderMonkey)	2014-11-05 14:03:14
3	Christian Pilegaard Cederquist	0.04 s	JavaScript (SpiderMonkey)	2023-06-01 21:37:23
4	Peter Kedemo	0.16 s	JavaScript (SpiderMonkey)	2017-07-18 21:31:15

#	User	Runtime	Language	Date
1	Hidden user	0.20 s	Kotlin	2020-04-17 23:05:12
2	Johnny Baloney	0.20 s	Kotlin	2022-02-15 22:53:12
3	Adam Rankin	0.21 s	Kotlin	2023-05-10 06:56:48
4	Jesper Bech Christensen	0.22 s	Kotlin	2023-08-27 17:32:40
5	Adam Koprowski	0.27 s	Kotlin	2020-11-20 22:40:31

#	User	Runtime	Language	Date
1	Shehab Ahmed Hatem	0.01 s	Lua	2023-11-14 02:00:32

#	User	Runtime	Language	Date
1	Danny Robinson	0.06 s	Prolog	2023-10-19 23:08:42
2	Alexander Viklund	0.07 s	Prolog	2019-04-12 02:27:45
3	Hidden user	0.07 s	Prolog	2019-04-18 17:13:39

#	User	Runtime	Language	Date
1	Kai Widell Niigata	0.05 s	Python 2	2014-04-14 16:56:46
2	Nishka Awasthi	0.06 s	Python 2	2022-09-09 08:18:39
3	Hidden user	0.08 s	Python 2	2014-11-12 02:14:08
4	Felix Balthasar Berief	0.08 s	Python 2	2019-04-09 18:01:49
5	Erik Sillén	0.09 s	Python 2	2017-06-12 17:23:14
6	Tore Norderud	0.10 s	Python 2	2014-12-20 15:59:23
7	Hermon Mulat	0.10 s	Python 2	2018-12-27 22:12:06
8	Hidden user	0.10 s	Python 2	2019-04-09 14:21:51
9	Shan Pinson	0.11 s	Python 2	2020-09-27 16:26:26
10	kreativt namn jag vet	0.11 s	Python 2	2020-11-14 23:46:15

#	User	Runtime	Language	Date
1	Noah Ó Donnaile	0.02 s	Python 3	2017-09-14 13:43:11
2	Josenildo Silva	0.02 s	Python 3	2017-12-08 01:06:17
3	Eimhin McDonald	0.02 s	Python 3	2018-07-26 00:46:39
4	Mikael Florén	0.03 s	Python 3	2014-11-09 13:30:50
5	Hidden user	0.03 s	Python 3	2014-11-19 10:56:55
6	Mattis Kancans Envall	0.03 s	Python 3	2015-01-14 14:37:34
7	Arnav Sastry	0.03 s	Python 3	2017-01-10 19:43:10
8	Daniel Nogueira	0.03 s	Python 3	2018-04-12 06:42:31
9	Samuel Henry Kurniawan	0.03 s	Python 3	2018-07-26 15:59:39
10	Fang Meiyi	0.03 s	Python 3	2019-01-07 07:10:19

#	User	Runtime	Language	Date
1	Thomas Feld	0.07 s	Ruby	2025-09-02 15:00:08

#	User	Length	Language	Date
1	David Avellan-Hultman	236	C	2020-12-13 18:11:33
2	David Avellan-Hultman	261	C	2020-11-18 11:16:55
3	Zachariah Goldthorpe	892	C	2017-08-12 18:45:09
4	Kevin Chevalier	1079	C	2022-11-13 05:35:36
5	Simone Moretti	1118	C	2020-10-20 22:29:54
6	Leonardo Gagliardoni	1120	C	2021-11-09 19:30:11
7	Nilam Semesta	1348	C	2024-12-15 18:11:30
8	André Danielsson	1992	C	2016-11-03 15:25:31
9	Oscar Cusin	2209	C	2024-04-15 18:44:08
10	Hidden user	2632	C	2024-11-21 23:56:54

#	User	Length	Language	Date
1	Simon Ståhlberg	2065	C#	2014-04-14 16:35:56
2	Sarah Tibell	4330	C#	2024-12-03 16:51:04

#	User	Length	Language	Date
1	David Avellan-Hultman	312	C++	2020-11-17 17:22:15
2	vid	605	C++	2022-09-08 06:41:10
3	人外沙耶	662	C++	2023-12-16 18:31:33
4	How Si Wei	691	C++	2016-02-02 14:02:11
5	Yeung Man Tsung	739	C++	2022-11-29 09:17:50
6	Lee Bing Heng	759	C++	2022-12-11 06:27:37
7	Johan Wind	769	C++	2018-10-21 14:37:59
8	Suchi Amalapurapu	805	C++	2020-06-02 08:26:07
9	Evan Magill	809	C++	2024-11-23 21:12:15
10	Hidden user	821	C++	2025-10-12 18:06:00

#	User	Length	Language	Date
1	Morten Clausen	1582	F#	2020-12-28 21:58:00

#	User	Length	Language	Date
1	Eidan Cohen	2031	Go	2023-02-10 16:02:26
2	Norbert Voelker	2296	Go	2021-04-01 16:50:14
3	Aleksander Jan Mistewicz	2538	Go	2019-04-22 18:16:10
4	Hidden user	3244	Go	2019-04-23 13:35:25
5	Johan Fogelström	3675	Go	2014-11-12 13:43:15

#	User	Length	Language	Date
1	Mikail Khan	517	Haskell	2022-09-07 06:11:36
2	Archie Walton	1082	Haskell	2023-11-30 23:17:34
3	Michael Gilliland	1147	Haskell	2020-10-29 18:12:27
4	Brent Yorgey	1166	Haskell	2020-01-01 03:31:40
5	Diego Pedraza	1244	Haskell	2017-03-14 20:49:38
6	Mason Anderson	1259	Haskell	2022-10-20 00:47:17
7	Hidden user	1278	Haskell	2024-02-09 05:20:45
8	Mathias Magnusson	1319	Haskell	2022-02-07 13:04:49
9	Samuel Kyletoft	1664	Haskell	2020-10-27 13:50:35
10	Fulano de Tal	1729	Haskell	2020-05-30 19:26:17

#	User	Length	Language	Date
1	Kiên Nguyễn Tiến Trung	1059	Java	2017-01-29 14:30:45
2	Doug Goodman	1210	Java	2018-05-20 15:58:24
3	José Vander Meulen	1499	Java	2018-01-19 15:27:28
4	Daniel Hollsten	1589	Java	2014-11-10 10:38:03
5	Carl Eriksson	1698	Java	2014-11-12 00:00:43
6	Micah Stairs	1744	Java	2016-12-21 23:19:20
7	Mitch Price	1879	Java	2016-09-26 03:51:01
8	Turner Atwood	1893	Java	2019-08-27 19:37:18
9	Rf Schmiermann	1946	Java	2019-09-07 20:27:04
10	Nathan Oakey	2031	Java	2025-10-08 02:29:10

#	User	Length	Language	Date
1	Christopher Churchwell	2467	JavaScript (Node.js)	2023-11-29 16:14:37

#	User	Length	Language	Date
1	Hidden user	1622	JavaScript (SpiderMonkey)	2014-10-28 11:10:04
2	Christian Pilegaard Cederquist	1702	JavaScript (SpiderMonkey)	2023-06-01 21:37:23
3	Peter Kedemo	1860	JavaScript (SpiderMonkey)	2017-07-18 21:31:15
4	Hidden user	2045	JavaScript (SpiderMonkey)	2014-11-05 14:03:14

#	User	Length	Language	Date
1	Jesper Bech Christensen	1231	Kotlin	2023-08-27 17:32:40
2	Adam Koprowski	1321	Kotlin	2020-11-20 22:40:31
3	Hidden user	1711	Kotlin	2020-04-17 23:05:12
4	Adam Rankin	2034	Kotlin	2023-05-10 06:56:48
5	Johnny Baloney	2289	Kotlin	2022-02-15 22:53:12

#	User	Length	Language	Date
1	Shehab Ahmed Hatem	2195	Lua	2023-11-14 02:00:32

#	User	Length	Language	Date
1	Danny Robinson	288	Prolog	2023-10-20 00:16:38
2	Alexander Viklund	2106	Prolog	2019-04-12 02:32:37
3	Hidden user	2115	Prolog	2019-04-18 17:14:58

#	User	Length	Language	Date
1	Milosz Wielondek	1003	Python 2	2016-11-09 02:01:00
2	Tore Norderud	1327	Python 2	2014-12-20 15:59:23
3	Hidden user	1428	Python 2	2014-11-12 02:14:08
4	Tz-Ching Yu	1556	Python 2	2023-09-11 09:51:10
5	Alonso Díaz	1556	Python 2	2025-06-19 07:26:57
6	Hermon Mulat	1557	Python 2	2018-12-27 22:12:06
7	Felix Balthasar Berief	1594	Python 2	2019-04-09 18:01:49
8	Shan Pinson	1615	Python 2	2020-09-27 16:26:26
9	kreativt namn jag vet	1615	Python 2	2020-11-14 23:46:15
10	Alberto Castagnaro	1615	Python 2	2021-11-14 13:47:35

#	User	Length	Language	Date
1	Michael Wu	190	Python 3	2025-01-03 10:16:18
2	Mikail Khan	295	Python 3	2022-09-07 20:17:42
3	Bhavesh Pareek	343	Python 3	2022-09-07 07:19:59
4	Lukas Kerren	451	Python 3	2024-03-09 01:57:49
5	Eimhin McDonald	563	Python 3	2018-07-26 00:46:39
6	Zac Friggstad	582	Python 3	2021-07-06 05:37:13
7	Jeremy Allison	583	Python 3	2024-11-11 18:21:04
8	Kelly Dance	584	Python 3	2025-05-14 00:06:12
9	Hidden user	616	Python 3	2021-05-06 04:09:32
10	Oskar Haarklou Veileborg	662	Python 3	2021-02-19 11:06:27

#	User	Length	Language	Date
1	Thomas Feld	175	Ruby	2025-09-02 15:31:29

#	User	Length	Language	Date
1	Vincent Lagerros	1456	Rust	2024-04-11 00:28:12
2	Marcus Östling	1666	Rust	2019-09-07 10:53:33
3	Rasmus Andersson	1698	Rust	2024-04-23 01:44:34
4	Hidden user	1778	Rust	2019-04-21 12:29:40
5	Christoffer Andersson	1910	Rust	2024-04-15 16:23:40
6	Adam Gausmann	1925	Rust	2022-12-27 05:22:22
7	Eric Xue	1983	Rust	2024-12-04 03:36:04
8	Ryan O'Hara	1985	Rust	2020-08-22 07:02:41
9	Bhavesh Pareek	2688	Rust	2022-09-01 08:54:49
10	Markus Videfors	2876	Rust	2023-06-03 14:44:47

Solution running time distribution