Problem A
Mirror Images — Problem Statistics

Back to problem description

Submissions	9557
Accepted submissions	4566
Submission ratio	47.78%
Authors	4020
Full solves [?]	3717
Full solve Ratio	92.46%

#	User	Runtime	Language	Date
1	Mesut Ekici	0.02 s	C#	2016-10-16 20:12:38
2	Jonathan Walker	0.02 s	C#	2016-10-19 17:36:40
3	Hidden user	0.02 s	C#	2016-12-25 00:28:37
4	Matthew Rocha	0.02 s	C#	2017-02-10 22:48:58
5	Jens Mossig	0.02 s	C#	2017-02-12 14:36:39
6	Shaun Lazaro	0.02 s	C#	2017-03-05 07:10:17
7	Hidden user	0.02 s	C#	2017-04-20 19:55:28
8	Rasmus Brants	0.02 s	C#	2017-04-28 09:03:14
9	Erik Rantala	0.02 s	C#	2017-05-24 23:55:09
10	Ólafur Andri	0.02 s	C#	2017-06-05 01:39:32

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.04 s	F#	2022-06-29 18:47:06
2	Patrick Bahr	0.08 s	F#	2021-02-21 21:53:38

#	User	Runtime	Language	Date
1	Krzysztof Gibuła	0.02 s	Go	2019-03-18 00:01:12
2	Logan Travis	0.02 s	Go	2025-09-02 03:21:59
3	Norbert Voelker	0.08 s	Go	2021-04-14 22:30:30
4	Adam Smith	0.10 s	Go	2017-03-08 22:34:07
5	T COM	0.10 s	Go	2021-01-15 07:20:29
6	Aleksandar Vorkapic	0.11 s	Go	2018-04-05 22:58:01
7	Ian Howell	0.13 s	Go	2017-01-25 05:47:46

#	User	Runtime	Language	Date
1	Javier Ojeda	0.06 s	Java	2016-10-15 20:08:56
2	Daniel Moyer	0.06 s	Java	2016-10-15 20:19:46
3	Martijn Muijsers	0.06 s	Java	2016-10-15 22:33:54
4	Finn Lidbetter	0.06 s	Java	2016-10-18 15:38:39
5	Michel Langeveld	0.06 s	Java	2016-11-05 14:11:05
6	Lozzi Ali	0.06 s	Java	2016-11-19 14:07:32
7	Hidden user	0.06 s	Java	2016-11-25 17:08:59
8	Othmane Bentaleb	0.06 s	Java	2016-11-27 22:59:06
9	Daniël Barenholz	0.06 s	Java	2017-05-07 15:45:31
10	Liam Keliher	0.06 s	Java	2017-05-09 04:48:26

#	User	Runtime	Language	Date
1	Hidden user	0.06 s	JavaScript (Node.js)	2024-08-23 22:11:51
2	Sander Hellesø	0.07 s	JavaScript (Node.js)	2019-04-14 01:35:32
3	Gurpartap Singh Bhatti	0.07 s	JavaScript (Node.js)	2019-06-02 00:54:02
4	Andoko Chandra	0.43 s	JavaScript (Node.js)	2020-10-09 21:16:12
5	Chris Wong	0.43 s	JavaScript (Node.js)	2021-02-07 02:12:53
6	Niamh Limerick	0.44 s	JavaScript (Node.js)	2022-04-13 15:41:29
7	John	0.45 s	JavaScript (Node.js)	2021-02-27 06:24:09
8	Khin Nyunt	0.45 s	JavaScript (Node.js)	2021-11-23 16:31:18
9	Howard Tin Chi Chan	0.53 s	JavaScript (Node.js)	2021-02-13 13:44:32

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-10-18 23:37:13
2	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2016-10-19 18:33:58
3	Tor Nordqvist	0.01 s	JavaScript (SpiderMonkey)	2016-11-08 13:25:31
4	J M	0.01 s	JavaScript (SpiderMonkey)	2016-11-18 19:50:43
5	Ionel Hindorean	0.01 s	JavaScript (SpiderMonkey)	2016-11-27 21:49:29
6	Mohammad Mousavi	0.01 s	JavaScript (SpiderMonkey)	2017-01-03 13:13:31
7	Spencer Smith	0.01 s	JavaScript (SpiderMonkey)	2017-06-06 23:52:31
8	Michael Hjortholt	0.01 s	JavaScript (SpiderMonkey)	2017-07-11 00:06:46
9	Peter Menyes	0.01 s	JavaScript (SpiderMonkey)	2017-08-07 19:54:56
10	Davíð Helgason	0.01 s	JavaScript (SpiderMonkey)	2017-08-07 20:37:50

#	User	Runtime	Language	Date
1	Timothy Gaede	0.66 s	Julia	2024-04-18 17:26:16

#	User	Runtime	Language	Date
1	Jacob Huebner	0.14 s	Kotlin	2020-04-27 04:06:49
2	Dayan Ruben Gonzalez	0.22 s	Kotlin	2020-09-29 15:44:59
3	Hidden user	0.23 s	Kotlin	2021-04-28 11:04:53
4	Taylor South	0.23 s	Kotlin	2023-03-28 23:38:50
5	Emil Wihlander	0.23 s	Kotlin	2023-07-27 16:08:01
6	Zaw Myat	0.23 s	Kotlin	2024-01-17 06:31:10
7	Dmitry Shostak	0.24 s	Kotlin	2018-08-23 08:51:19
8	Adam Rankin	0.24 s	Kotlin	2023-04-29 23:58:20
9	Neil Harmon	0.25 s	Kotlin	2019-04-26 15:20:17
10	Leonard Alexander Blechschmidt	0.26 s	Kotlin	2021-11-08 16:22:25

#	User	Runtime	Language	Date
1	David Connolly	0.00 s	Pascal	2017-08-18 16:52:17
2	Egor Shchetinin	0.00 s	Pascal	2018-01-23 17:27:47
3	Vova Podkorytov	0.00 s	Pascal	2018-01-23 17:28:30
4	Nhật Nguyễn Minh	0.00 s	Pascal	2021-10-16 06:08:04

#	User	Runtime	Language	Date
1	Steven D. Wilson	0.01 s	PHP	2016-11-17 03:00:50
2	Renate	0.01 s	PHP	2021-05-31 00:35:37
3	Andre Wahyudi	0.01 s	PHP	2022-10-25 11:23:49
4	Susanne Ragnemalm	0.01 s	PHP	2023-11-20 06:20:38
5	Jonas Lindenskov Nielsen	0.02 s	PHP	2019-11-05 14:22:10

#	User	Runtime	Language	Date
1	Hadi Qovaizi	0.02 s	Prolog	2016-12-17 21:35:41
2	Andriy Zyevakov	0.02 s	Prolog	2017-06-18 16:35:39
3	Hakan Kjellerstrand	0.02 s	Prolog	2023-02-24 21:11:38

#	User	Runtime	Language	Date
1	Ted Morin	0.03 s	Python 2	2016-10-15 20:35:03
2	Christofer Ohlsson	0.03 s	Python 2	2016-10-15 20:40:33
3	Maksym Bendeberia	0.03 s	Python 2	2016-10-20 15:00:17
4	Siri Dovner	0.03 s	Python 2	2016-11-27 16:17:34
5	Hidden user	0.03 s	Python 2	2016-12-08 20:08:34
6	Matteo Piano	0.03 s	Python 2	2016-12-19 23:12:05
7	Felipe Mota	0.03 s	Python 2	2016-12-30 14:50:17
8	Wyatt Wismer	0.03 s	Python 2	2017-01-16 20:04:58
9	Miguel Alfageme Sanchez	0.03 s	Python 2	2017-02-05 03:32:51
10	Jared Rondeau	0.03 s	Python 2	2017-02-10 22:21:13

#	User	Runtime	Language	Date
1	Victor Zheng	0.02 s	Python 3	2016-10-15 20:09:05
2	Zachariah Goldthorpe	0.02 s	Python 3	2016-10-15 20:10:52
3	Joel De La Cruz	0.02 s	Python 3	2016-10-15 20:12:08
4	Hidden user	0.02 s	Python 3	2016-10-15 20:14:51
5	Jan Clarin	0.02 s	Python 3	2016-10-15 20:19:34
6	Kevin Gordon	0.02 s	Python 3	2016-10-15 20:24:20
7	Jeff Robertson	0.02 s	Python 3	2016-10-15 20:24:28
8	Swaraj Dhumne	0.02 s	Python 3	2016-10-15 20:24:29
9	Christian Lindeström	0.02 s	Python 3	2016-10-15 20:26:22
10	Stepan Fedorko-Bartos	0.02 s	Python 3	2016-10-15 20:27:59

#	User	Runtime	Language	Date
1	Hidden user	0.03 s	Ruby	2017-12-26 02:45:26
2	Niraj P	0.04 s	Ruby	2017-02-15 16:06:58
3	Macdara mac an tSionnaigh	0.04 s	Ruby	2019-10-05 02:44:03
4	Thomas Feld	0.06 s	Ruby	2022-11-14 14:38:36

#	User	Length	Language	Date
1	Benjamin Iserman	189	C	2023-03-21 21:10:03
2	a_b__c	203	C	2021-11-27 18:52:17
3	Matthew Hartono	344	C	2022-07-12 10:10:47
4	Dawson Holmes	349	C	2023-09-12 04:06:42
5	Jesus Sanchez	372	C	2023-09-12 19:02:17
6	Lauren Hurd	374	C	2023-09-08 16:13:53
7	Andros Clarence Chen	376	C	2020-12-21 04:32:16
8	Hidden user	385	C	2018-11-01 15:16:29
9	Juan Trilnardo Defrin	393	C	2021-01-24 17:54:05
10	Lee Geng Yu	401	C	2018-01-05 06:43:57

#	User	Length	Language	Date
1	Kunwei Zhang	592	C#	2018-02-04 11:49:29
2	Jacob Carlsson	656	C#	2022-02-25 12:22:17
3	Nicke Nyfiken	756	C#	2025-03-21 13:20:08
4	Frian Tampake	760	C#	2023-03-24 03:46:25
5	Göran Andersson	809	C#	2022-05-10 14:57:49
6	Thomas Norris	814	C#	2019-06-26 04:17:45
7	Victor Hultén Mattsson	854	C#	2022-06-17 11:53:25
8	Ahmad Barhamje	885	C#	2022-11-25 17:10:30
9	Shaun Lazaro	893	C#	2017-03-05 07:10:17
10	Vvv	901	C#	2022-05-13 19:07:25

#	User	Length	Language	Date
1	Frans Meulenbroeks	201	C++	2024-10-29 23:18:27
2	Taylor Rodríguez	212	C++	2024-10-27 06:41:30
3	24袁楷森	294	C++	2025-10-13 18:42:04
4	Kevin X Huai	297	C++	2025-09-04 06:03:40
5	Tseng Wai Yin	322	C++	2020-02-09 18:19:42
6	PiPer	322	C++	2023-01-29 08:37:26
7	SiBi	328	C++	2018-11-04 09:31:12
8	Ankit Kumar	330	C++	2017-04-05 16:31:03
9	Yeung Man Tsung	342	C++	2022-11-29 09:55:12
10	Li Yao'an	346	C++	2017-01-10 12:37:18

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	583	F#	2022-06-29 18:47:06
2	Patrick Bahr	2111	F#	2021-02-21 21:53:38

#	User	Length	Language	Date
1	Ian Howell	476	Go	2017-01-25 05:47:46
2	Aleksandar Vorkapic	580	Go	2018-04-05 22:58:01
3	Adam Smith	583	Go	2017-03-08 22:34:07
4	Logan Travis	667	Go	2025-09-02 03:21:59
5	T COM	668	Go	2021-01-15 07:20:29
6	Krzysztof Gibuła	815	Go	2019-03-18 00:01:12
7	Norbert Voelker	846	Go	2021-04-14 22:32:35

#	User	Length	Language	Date
1	Carl Agrell	294	Haskell	2016-11-28 16:03:33
2	Øyvind Almli	315	Haskell	2021-09-14 00:45:13
3	Anthony Clays	353	Haskell	2017-01-05 17:43:08
4	Lieven Marchand	359	Haskell	2017-08-23 19:17:21
5	David Wärn	361	Haskell	2016-10-19 14:20:50
6	Jackson Garner	376	Haskell	2017-10-07 19:34:43
7	Johan Meier	377	Haskell	2016-12-27 15:45:37
8	Juanjo Ortega	427	Haskell	2017-03-12 12:44:16
9	Erik Tjøswold	431	Haskell	2018-03-28 21:03:28
10	Md Akif Chowdhury	443	Haskell	2022-09-24 09:34:49

#	User	Length	Language	Date
1	Justin Turner	474	Java	2018-01-15 23:00:22
2	Hidden user	487	Java	2016-10-18 14:47:46
3	Ayoub El Yaquine	509	Java	2016-12-19 17:28:12
4	Ruiming Xiong	515	Java	2016-10-15 20:20:54
5	Doug Goodman	521	Java	2018-02-23 16:48:47
6	Thomas King	527	Java	2020-07-17 20:54:07
7	Quan Tran	542	Java	2017-04-19 21:03:05
8	Antonio Nina Gutierrez	545	Java	2023-03-10 03:55:06
9	Qritel Abdelilah	548	Java	2017-04-24 19:18:18
10	Ryan Hartman	553	Java	2016-10-15 21:16:55

#	User	Length	Language	Date
1	Chris Wong	611	JavaScript (Node.js)	2021-02-07 02:12:53
2	Gurpartap Singh Bhatti	644	JavaScript (Node.js)	2019-06-02 00:54:02
3	Howard Tin Chi Chan	656	JavaScript (Node.js)	2021-02-13 13:44:32
4	Hidden user	768	JavaScript (Node.js)	2024-08-23 22:11:51
5	Sander Hellesø	865	JavaScript (Node.js)	2019-04-14 01:35:32
6	Niamh Limerick	1008	JavaScript (Node.js)	2022-04-13 15:41:29
7	Khin Nyunt	1072	JavaScript (Node.js)	2021-11-23 16:31:18
8	John	1122	JavaScript (Node.js)	2021-02-27 06:24:09
9	Andoko Chandra	1132	JavaScript (Node.js)	2020-10-09 21:16:12

#	User	Length	Language	Date
1	Jimmy Gustafsson	150	JavaScript (SpiderMonkey)	2024-08-21 21:37:45
2	Christian Pilegaard Cederquist	254	JavaScript (SpiderMonkey)	2023-01-07 18:26:47
3	Claudius Sundlöf	278	JavaScript (SpiderMonkey)	2017-09-30 03:02:15
4	Hai Yang Xu	286	JavaScript (SpiderMonkey)	2017-09-24 04:35:21
5	Bjørn Chr. Soltvedt	305	JavaScript (SpiderMonkey)	2016-10-18 23:37:13
6	Salah Saleh	330	JavaScript (SpiderMonkey)	2018-04-23 19:51:55
7	J M	339	JavaScript (SpiderMonkey)	2016-11-18 19:50:43
8	Peter Menyes	353	JavaScript (SpiderMonkey)	2017-08-07 19:54:56
9	Peter Kedemo	379	JavaScript (SpiderMonkey)	2016-10-19 18:33:58
10	Michael Hjortholt	413	JavaScript (SpiderMonkey)	2017-07-11 00:06:46

#	User	Length	Language	Date
1	Timothy Gaede	1701	Julia	2024-04-18 17:26:16

#	User	Length	Language	Date
1	Emil Wihlander	344	Kotlin	2023-07-27 16:08:01
2	Troy Warmboe	361	Kotlin	2020-02-11 17:31:05
3	Leonard Alexander Blechschmidt	381	Kotlin	2021-11-08 16:22:25
4	Dayan Ruben Gonzalez	383	Kotlin	2020-09-29 15:44:59
5	Dmitry Shostak	397	Kotlin	2018-08-23 08:51:19
6	Hidden user	417	Kotlin	2021-04-28 11:04:53
7	Jahid Hasan Imon	455	Kotlin	2020-05-16 18:47:34
8	Rrr	526	Kotlin	2020-02-12 10:52:44
9	Jacob Huebner	596	Kotlin	2020-04-27 04:06:49
10	Zaw Myat	659	Kotlin	2024-01-17 06:31:10

#	User	Length	Language	Date
1	Egor Shchetinin	436	Pascal	2018-01-23 17:27:47
2	Vova Podkorytov	470	Pascal	2018-01-23 17:28:30
3	Nhật Nguyễn Minh	610	Pascal	2021-10-16 06:08:04
4	David Connolly	1236	Pascal	2017-08-18 16:53:25

#	User	Length	Language	Date
1	Steven D. Wilson	346	PHP	2016-11-17 03:00:50
2	Jonas Lindenskov Nielsen	456	PHP	2019-11-05 14:22:10
3	Renate	539	PHP	2021-05-31 00:35:37
4	Susanne Ragnemalm	661	PHP	2023-11-20 06:20:38
5	Andre Wahyudi	954	PHP	2022-10-25 11:23:49

#	User	Length	Language	Date
1	Andriy Zyevakov	305	Prolog	2017-06-18 16:35:39
2	Hakan Kjellerstrand	445	Prolog	2023-02-24 21:11:38
3	Hadi Qovaizi	6758	Prolog	2016-12-17 21:35:41

#	User	Length	Language	Date
1	Thomas Feld	143	Python 2	2019-08-20 16:54:18
2	Sigurður Jens Albertsson	169	Python 2	2017-11-25 19:48:56
3	Hidden user	176	Python 2	2017-10-15 19:26:24
4	Hubert Teo	193	Python 2	2017-02-17 03:38:26
5	Lars Åström	194	Python 2	2019-10-08 09:14:48
6	Jesper Öqvist	202	Python 2	2018-10-20 16:01:50
7	Andreas Björklund	210	Python 2	2020-02-29 16:36:16
8	Victor Barbarosh	211	Python 2	2016-10-19 20:45:23
9	Eoin Davey	216	Python 2	2017-09-08 21:00:43
10	Hidden user	226	Python 2	2017-11-09 19:49:37

#	User	Length	Language	Date
1	Benjamin Z White	108	Python 3	2023-05-17 15:02:12
2	Clement Oh	108	Python 3	2023-07-12 03:14:56
3	Thomas Draper	112	Python 3	2023-07-11 18:36:07
4	Xander Fair	113	Python 3	2025-09-04 04:05:36
5	Morten Clausen	116	Python 3	2022-10-21 15:19:29
6	Harry Zhang	116	Python 3	2022-12-23 09:58:53
7	Lukas Kerren	116	Python 3	2024-11-21 16:00:50
8	Kaaden RumanCam	127	Python 3	2023-09-05 17:24:54
9	Farzam Abrishami	131	Python 3	2024-02-17 12:51:13
10	Herman Karlsson	133	Python 3	2016-10-19 20:51:37

#	User	Length	Language	Date
1	Thomas Feld	72	Ruby	2023-01-05 17:19:48
2	Niraj P	202	Ruby	2017-02-15 16:06:58
3	Macdara mac an tSionnaigh	243	Ruby	2019-10-05 02:44:03
4	Hidden user	330	Ruby	2017-12-26 02:45:26

#	User	Length	Language	Date
1	David Aldenbro	338	Rust	2023-10-26 18:57:43
2	Pankajkumar Patro	714	Rust	2025-07-25 16:22:31
3	Hidden user	718	Rust	2021-02-24 12:31:26
4	David Zacek	808	Rust	2021-05-24 02:07:28
5	Bas Dirks	813	Rust	2022-01-01 15:21:32
6	Kok Dith	871	Rust	2021-08-06 05:42:04
7	Isak Jägberg	1205	Rust	2019-05-07 18:51:22
8	Eric Pinter	1248	Rust	2021-06-05 06:46:38
9	Joe Blower	1799	Rust	2025-07-02 02:34:43
10	Krish Lal	1833	Rust	2025-09-03 21:19:49

Solution running time distribution