Problem A
Line Them Up — Problem Statistics

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Submissions	20713
Accepted submissions	9818
Submission ratio	47.40%
Authors	9161
Full solves [?]	8447
Full solve Ratio	92.21%

#	User	Runtime	Language	Date
1	Frans Meulenbroeks	0.02 s	Bash	2024-09-09 15:25:28

#	User	Runtime	Language	Date
1	Joe Amenta	0.01 s	C#	2016-04-05 01:32:56
2	Jens Mossig	0.02 s	C#	2015-12-24 13:19:37
3	Yuwono Bangun Nagoro	0.02 s	C#	2016-01-02 12:21:02
4	Faisal Rahman	0.02 s	C#	2016-01-17 12:05:53
5	Andriy Zyevakov	0.02 s	C#	2016-01-27 15:21:16
6	Luiz Miranda	0.02 s	C#	2016-04-02 20:25:07
7	Hidden user	0.02 s	C#	2016-04-02 21:07:26
8	Emílio Weba	0.02 s	C#	2016-04-03 19:31:52
9	Khin Nyunt	0.02 s	C#	2016-04-12 05:37:21
10	Raja Sanjeev Kumar Nakka	0.02 s	C#	2016-04-26 19:51:46

#	User	Runtime	Language	Date
1	David Cawthon	0.01 s	Common Lisp	2020-07-17 03:35:18

#	User	Runtime	Language	Date
1	dick move	0.00 s	Crystal	2025-09-27 13:18:40

#	User	Runtime	Language	Date
1	عيسى علي عبدالله احمد	0.01 s	Dart	2024-07-04 18:00:19
2	Abdullah Ali Hussein	0.01 s	Dart	2024-07-04 18:20:30

#	User	Runtime	Language	Date
1	Patrick Bahr	0.04 s	F#	2021-02-21 22:28:49
2	Hidden user	0.05 s	F#	2022-12-21 09:59:54
3	Jacob Harris Cryer Kragh	0.07 s	F#	2022-07-30 10:07:44

#	User	Runtime	Language	Date
1	Husain Satan	0.00 s	Go	2023-12-03 13:31:33
2	Hidden user	0.00 s	Go	2024-04-28 07:43:30
3	Kiki Ibrahim	0.00 s	Go	2024-05-05 12:58:44
4	Hidden user	0.00 s	Go	2024-05-08 07:18:50
5	Jimmy Nejtron	0.00 s	Go	2024-12-29 15:46:45
6	Krzysztof Gibuła	0.07 s	Go	2019-03-09 15:00:55
7	Péter Szakszon	0.07 s	Go	2021-12-22 16:47:26
8	Ian Howell	0.08 s	Go	2016-05-29 05:26:35
9	Bastian Boger	0.08 s	Go	2016-12-28 23:41:54
10	Jacob Pine	0.08 s	Go	2019-09-28 01:44:22

#	User	Runtime	Language	Date
1	Vashista Basava	0.04 s	Java	2024-08-15 14:07:32
2	CUX "INDIO" PRADA	0.04 s	Java	2024-10-16 20:04:48
3	Guangyi Zhou	0.04 s	Java	2025-02-01 19:29:10
4	Tarek	0.04 s	Java	2025-09-17 02:22:07
5	Nick Wu	0.05 s	Java	2015-11-07 23:08:54
6	Michael Sullivan	0.05 s	Java	2015-11-11 11:18:33
7	Victor Sui	0.05 s	Java	2015-11-13 03:47:32
8	Hau Tran Phuc	0.05 s	Java	2015-11-14 09:04:19
9	Omar Brome	0.05 s	Java	2015-11-20 15:57:09
10	Pål Forsberg	0.05 s	Java	2015-11-21 13:20:45

#	User	Runtime	Language	Date
1	مصطفى عصام عبد الجبار	0.04 s	JavaScript (Node.js)	2024-07-04 18:07:47
2	sabaa safaa	0.04 s	JavaScript (Node.js)	2024-07-04 18:25:19
3	Mina Thamer	0.04 s	JavaScript (Node.js)	2024-07-04 18:26:30
4	yousef alkobary	0.04 s	JavaScript (Node.js)	2024-07-04 18:27:21
5	Kristoffer S Kvale	0.04 s	JavaScript (Node.js)	2025-06-17 16:51:28
6	Hidden user	0.05 s	JavaScript (Node.js)	2023-09-22 05:38:06
7	TEJA KUSUMA	0.05 s	JavaScript (Node.js)	2023-12-05 15:57:02
8	Rizky Muliawan	0.05 s	JavaScript (Node.js)	2024-02-07 15:24:53
9	Mohammed Falih	0.05 s	JavaScript (Node.js)	2024-07-04 17:51:41
10	Radhwan Muntasser Alzerary	0.05 s	JavaScript (Node.js)	2024-07-04 17:53:39

#	User	Runtime	Language	Date
1	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2015-12-18 11:52:11
2	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-01-12 18:03:42
3	Tim Oram	0.01 s	JavaScript (SpiderMonkey)	2016-03-10 15:37:14
4	Gabriel Lau	0.01 s	JavaScript (SpiderMonkey)	2016-03-28 07:48:00
5	Johannes Jensen	0.01 s	JavaScript (SpiderMonkey)	2016-03-31 11:26:50
6	Tor Nordqvist	0.01 s	JavaScript (SpiderMonkey)	2016-11-19 11:45:21
7	Ionel Hindorean	0.01 s	JavaScript (SpiderMonkey)	2016-11-25 16:48:19
8	Magnus Jonsson	0.01 s	JavaScript (SpiderMonkey)	2016-12-09 11:31:02
9	Peter Menyes	0.01 s	JavaScript (SpiderMonkey)	2017-08-27 22:19:13
10	Goran Sherko Jawdat	0.01 s	JavaScript (SpiderMonkey)	2018-04-25 17:22:39

#	User	Runtime	Language	Date
1	Noszály Csaba	0.33 s	Julia	2025-02-23 17:56:18
2	Alexandre Charland	0.40 s	Julia	2024-02-15 13:16:55
3	Danny Robinson	0.48 s	Julia	2023-06-23 05:54:56
4	Timothy Gaede	0.49 s	Julia	2024-03-25 06:36:06

#	User	Runtime	Language	Date
1	Hidden user	0.11 s	Kotlin	2020-11-05 01:08:03
2	Hidden user	0.14 s	Kotlin	2017-12-07 20:49:28
3	Jacob Huebner	0.14 s	Kotlin	2020-03-17 00:35:44
4	Dayan Ruben Gonzalez	0.14 s	Kotlin	2020-09-29 16:40:25
5	James WIlliams	0.16 s	Kotlin	2020-09-27 05:45:18
6	Kelly Dance	0.16 s	Kotlin	2022-09-25 01:24:59
7	Dmitry Shostak	0.17 s	Kotlin	2018-06-20 19:31:46
8	Jahid Hasan Imon	0.17 s	Kotlin	2020-05-13 19:14:35
9	Simon Lixenfeld	0.17 s	Kotlin	2021-06-13 21:01:33
10	Johnny Baloney	0.17 s	Kotlin	2021-09-19 18:08:22

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Nim	2025-09-23 12:11:09

#	User	Runtime	Language	Date
1	Sam Henke	0.00 s	OCaml	2023-09-30 07:53:43

#	User	Runtime	Language	Date
1	David Connolly	0.00 s	Pascal	2022-07-08 17:28:23
2	Hobert Ho	0.00 s	Pascal	2022-07-22 13:50:05

#	User	Runtime	Language	Date
1	Martin Dibakar Björling	0.01 s	PHP	2015-11-24 14:41:54
2	Silvena Lam	0.01 s	PHP	2016-02-10 17:21:14
3	Steven D. Wilson	0.01 s	PHP	2016-03-25 17:16:14
4	Jonas Lindenskov Nielsen	0.01 s	PHP	2019-10-08 11:42:21
5	cojonas1	0.01 s	PHP	2021-03-24 10:04:32
6	Renate	0.01 s	PHP	2021-04-29 01:28:52
7	陳建宏	0.01 s	PHP	2021-06-12 19:32:37
8	Andre Wahyudi	0.01 s	PHP	2023-05-29 06:06:34
9	Abdalazeez Firas	0.01 s	PHP	2024-07-04 18:20:37

#	User	Runtime	Language	Date
1	Hadi Qovaizi	0.01 s	Prolog	2016-05-08 04:57:20
2	Hakan Kjellerstrand	0.02 s	Prolog	2023-02-11 18:25:17

#	User	Runtime	Language	Date
1	Christofer Ohlsson	0.02 s	Python 2	2015-11-08 12:24:38
2	Asger Hautop Drewsen	0.02 s	Python 2	2015-11-08 15:05:09
3	Carl Martin Rosenberg	0.02 s	Python 2	2015-11-08 22:32:10
4	Tore Norderud	0.02 s	Python 2	2015-11-10 23:48:52
5	Uttam Thakore	0.02 s	Python 2	2015-11-11 23:29:55
6	Frederik Højholt	0.02 s	Python 2	2015-11-13 09:24:16
7	Hans Rusten	0.02 s	Python 2	2015-11-15 15:37:43
8	Erik Sillén	0.02 s	Python 2	2015-11-21 18:02:32
9	Brandon Gilchrist	0.02 s	Python 2	2015-11-30 02:42:11
10	Arne Tobias Malkenes Ødegaard	0.02 s	Python 2	2015-12-06 23:13:37

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	Python 3	2015-11-08 22:40:01
2	Devin Munger	0.02 s	Python 3	2015-11-09 06:24:25
3	Hidden user	0.02 s	Python 3	2015-11-09 23:59:47
4	Hidden user	0.02 s	Python 3	2015-11-10 00:54:49
5	Pedro Juarez	0.02 s	Python 3	2015-11-10 01:10:44
6	Hidden user	0.02 s	Python 3	2015-11-10 06:25:49
7	Hidden user	0.02 s	Python 3	2015-11-10 08:47:57
8	Dana Litovsky Alcala	0.02 s	Python 3	2015-11-10 16:59:58
9	Shelby Mahaffie	0.02 s	Python 3	2015-11-11 04:43:08
10	Hidden user	0.02 s	Python 3	2015-11-11 05:02:08

#	User	Runtime	Language	Date
1	Casper Christensen	0.03 s	Ruby	2015-12-31 15:30:46
2	Gerry Hall	0.03 s	Ruby	2016-03-26 04:14:30
3	Lasse Berglund	0.03 s	Ruby	2016-03-29 09:16:02
4	Kellen Watt	0.03 s	Ruby	2016-04-18 07:08:48
5	Erik Rydbert	0.03 s	Ruby	2016-07-11 05:38:29
6	Mehdi Maick	0.03 s	Ruby	2016-07-31 18:05:51
7	Kevin Suwala	0.03 s	Ruby	2017-01-07 02:48:32
8	Mouad Naciri	0.03 s	Ruby	2017-04-09 15:26:00
9	Joel Niemelä	0.03 s	Ruby	2017-06-14 01:32:27
10	Hidden user	0.04 s	Ruby	2018-10-13 16:40:17

#	User	Runtime	Language	Date
1	Nicolai Fredriksen	0.04 s	TypeScript	2025-06-17 16:30:55

#	User	Runtime	Language	Date
1	Jacob Minder	0.04 s	Visual Basic	2025-03-27 02:00:17

#	User	Runtime	Language	Date
1	Joe Blower	0.00 s	Zig	2025-05-17 02:55:54

#	User	Length	Language	Date
1	Frans Meulenbroeks	107	Bash	2024-09-09 15:28:29

#	User	Length	Language	Date
1	Martin Blom	175	C	2023-12-29 13:17:19
2	Sawyer Frie	213	C	2024-03-24 22:15:29
3	Hidden user	389	C	2024-10-19 08:05:54
4	kalaiselvan.R	427	C	2019-09-26 08:12:51
5	David Ludwig	431	C	2017-11-11 23:44:03
6	Stiff	434	C	2021-05-15 06:01:44
7	Nguyen Huy Duc Duy	435	C	2016-03-08 08:37:40
8	Kester Ng	446	C	2019-12-23 09:07:56
9	Ng Wei Jie	446	C	2020-02-18 11:12:23
10	Roberto Kreshna	446	C	2020-12-10 16:03:08

#	User	Length	Language	Date
1	李陆屿	551	C#	2019-05-03 18:29:29
2	Olle Mattsson	590	C#	2025-10-22 12:14:33
3	Kunwei Zhang	610	C#	2018-06-12 10:35:35
4	Thomas Norris	623	C#	2019-06-21 05:30:09
5	Göran Andersson	631	C#	2022-05-15 01:59:56
6	Yuwono Bangun Nagoro	685	C#	2016-01-02 12:21:02
7	Michael Damsgaard	756	C#	2024-11-19 03:28:28
8	Shantanu Sharma	793	C#	2024-11-08 08:23:15
9	Þorsteinn Þorvaldsson	796	C#	2017-05-30 02:16:46
10	Eric Weiss	800	C#	2022-08-19 22:03:01

#	User	Length	Language	Date
1	Hakan Kjellerstrand	185	C++	2025-03-02 09:33:11
2	Tyler Fernando	217	C++	2022-11-07 04:21:02
3	Mugeon Kim	263	C++	2024-01-03 04:12:17
4	Herman Karlsson	270	C++	2015-11-20 00:12:20
5	Jan Keith Darunday	313	C++	2016-02-05 08:11:31
6	Inamul Haque Shibly	314	C++	2018-02-02 16:49:33
7	Markus Mathiasen	321	C++	2021-05-04 12:50:22
8	Subramanian Ramasamy	323	C++	2022-08-05 11:05:14
9	刀影雷文	329	C++	2025-07-15 15:45:12
10	Neev Kataria	330	C++	2025-02-23 13:21:02

#	User	Length	Language	Date
1	David Cawthon	483	Common Lisp	2020-07-17 03:35:18

#	User	Length	Language	Date
1	dick move	231	Crystal	2025-09-27 13:18:40

#	User	Length	Language	Date
1	Abdullah Ali Hussein	711	Dart	2024-07-04 18:20:30
2	عيسى علي عبدالله احمد	750	Dart	2024-07-04 18:00:19

#	User	Length	Language	Date
1	Hidden user	565	F#	2022-12-21 09:59:54
2	Jacob Harris Cryer Kragh	653	F#	2022-07-30 10:07:44
3	Patrick Bahr	2008	F#	2021-02-21 22:28:49

#	User	Length	Language	Date
1	Jacob Pine	415	Go	2019-09-28 01:44:22
2	Bastian Boger	514	Go	2016-12-29 18:20:43
3	Ian Howell	518	Go	2016-05-29 05:26:35
4	Krzysztof Gibuła	546	Go	2019-03-09 15:00:55
5	Jimmy Nejtron	594	Go	2024-12-29 15:46:45
6	Hidden user	645	Go	2024-04-28 07:43:30
7	Fahmi Ardhianto	720	Go	2020-08-23 09:50:39
8	Kiki Ibrahim	773	Go	2024-05-05 12:58:44
9	Hidden user	821	Go	2024-05-08 07:18:50
10	Hidden user	900	Go	2019-11-23 17:59:43

#	User	Length	Language	Date
1	Mason Barnhill	179	Haskell	2023-10-19 00:13:36
2	Birk Tjelmeland	184	Haskell	2017-01-09 01:25:58
3	David Wärn	193	Haskell	2015-11-17 22:02:51
4	Freek van Keulen	212	Haskell	2021-02-08 15:44:09
5	David Zacek	212	Haskell	2021-05-03 23:40:49
6	Anthony Clark	217	Haskell	2017-03-04 01:52:55
7	Zach Tschetter	229	Haskell	2021-04-14 15:52:46
8	Daniel Cabral	237	Haskell	2021-08-23 18:39:17
9	Joshua Coward	259	Haskell	2021-10-22 22:02:54
10	Steinar Simonnes	261	Haskell	2024-01-18 16:41:19

#	User	Length	Language	Date
1	Federico Baron	518	Java	2017-03-02 17:52:09
2	Doug Goodman	520	Java	2017-07-30 02:15:50
3	Anirudh Rahul	531	Java	2016-09-08 16:54:38
4	Udit Sanghi	531	Java	2021-07-18 11:42:40
5	Akanksh Jain	541	Java	2017-03-02 15:06:14
6	Jordan Edelman	541	Java	2017-03-02 18:11:39
7	Rahat Mahbub	552	Java	2016-12-26 08:04:44
8	Frank Luan	554	Java	2016-10-01 19:48:26
9	Paolo Colmenares	556	Java	2017-03-04 23:12:37
10	Anurag Kulkarni	557	Java	2017-03-05 00:22:34

#	User	Length	Language	Date
1	Antoine Bauri	501	JavaScript (Node.js)	2021-02-16 18:24:54
2	Chua Sheng You	513	JavaScript (Node.js)	2022-04-24 16:31:16
3	Ng Qi Yuen	513	JavaScript (Node.js)	2022-04-24 16:46:55
4	amanda	514	JavaScript (Node.js)	2022-04-24 17:41:51
5	A.Veronica Hester	516	JavaScript (Node.js)	2022-04-23 14:36:38
6	Emil Larsson	518	JavaScript (Node.js)	2019-09-22 14:46:31
7	Nur Syazliyarni	631	JavaScript (Node.js)	2022-04-24 17:11:16
8	Jeremiah Ang	660	JavaScript (Node.js)	2022-03-22 08:33:50
9	Athena Pulutan	680	JavaScript (Node.js)	2022-04-24 16:41:53
10	Li Juan	680	JavaScript (Node.js)	2022-04-24 17:09:34

#	User	Length	Language	Date
1	Jimmy Gustafsson	140	JavaScript (SpiderMonkey)	2024-06-17 22:51:21
2	Bjørn Chr. Soltvedt	289	JavaScript (SpiderMonkey)	2016-01-12 18:06:29
3	Christian Pilegaard Cederquist	343	JavaScript (SpiderMonkey)	2023-01-12 23:48:32
4	Evan Magill	360	JavaScript (SpiderMonkey)	2024-10-30 17:08:38
5	Johannes Jensen	373	JavaScript (SpiderMonkey)	2016-03-31 11:26:50
6	Peter Menyes	382	JavaScript (SpiderMonkey)	2017-08-27 22:19:13
7	Casey Smith	407	JavaScript (SpiderMonkey)	2019-05-30 15:46:46
8	Gabriel Lau	436	JavaScript (SpiderMonkey)	2016-03-28 07:48:00
9	Peter Kedemo	451	JavaScript (SpiderMonkey)	2015-12-18 11:52:11
10	Nick Cooper	527	JavaScript (SpiderMonkey)	2024-01-25 01:15:12

#	User	Length	Language	Date
1	Alexandre Charland	99	Julia	2024-02-15 13:16:55
2	Danny Robinson	101	Julia	2023-06-23 05:54:56
3	Noszály Csaba	241	Julia	2025-02-23 17:56:18
4	Timothy Gaede	1392	Julia	2024-03-25 06:36:06

#	User	Length	Language	Date
1	Magnus Tønnessen	235	Kotlin	2025-06-17 15:59:40
2	Sondre Martin Bakke	241	Kotlin	2025-06-17 15:53:52
3	Yang Tang	287	Kotlin	2023-07-19 09:11:35
4	Adam Rankin	296	Kotlin	2023-05-02 20:34:09
5	Adam Koprowski	356	Kotlin	2020-09-12 00:15:45
6	Simon Lixenfeld	381	Kotlin	2021-06-13 21:07:22
7	Zaw Myat	415	Kotlin	2024-01-28 09:05:20
8	Sarek Høverstad Skotåm	416	Kotlin	2020-10-12 00:18:14
9	Einar Kjellback	458	Kotlin	2019-11-29 13:07:11
10	Kim Stephen Bovim	459	Kotlin	2020-04-03 16:09:52

#	User	Length	Language	Date
1	Hidden user	492	Nim	2025-09-23 12:11:09

#	User	Length	Language	Date
1	Sam Henke	729	OCaml	2023-09-30 07:53:43

#	User	Length	Language	Date
1	David Connolly	592	Pascal	2022-07-08 17:28:23
2	Hobert Ho	2305	Pascal	2022-07-22 13:50:05

#	User	Length	Language	Date
1	Jonas Lindenskov Nielsen	361	PHP	2019-10-08 11:42:21
2	Renate	388	PHP	2021-04-29 01:28:52
3	Silvena Lam	452	PHP	2016-02-10 17:21:14
4	Steven D. Wilson	454	PHP	2016-03-25 17:16:14
5	cojonas1	645	PHP	2021-03-24 10:04:32
6	Martin Dibakar Björling	769	PHP	2015-11-24 14:41:54
7	Andre Wahyudi	789	PHP	2023-05-29 06:06:34
8	Abdalazeez Firas	818	PHP	2024-07-04 18:20:37
9	陳建宏	1449	PHP	2021-06-12 19:32:37

#	User	Length	Language	Date
1	Hakan Kjellerstrand	130	Prolog	2023-03-17 17:59:15
2	Hadi Qovaizi	6433	Prolog	2016-05-08 04:57:20

#	User	Length	Language	Date
1	Thomas Feld	135	Python 2	2019-08-19 12:14:58
2	Justin Su	143	Python 2	2017-09-19 22:51:57
3	Jeff Robertson	173	Python 2	2017-08-17 20:36:05
4	Conor McCauley	180	Python 2	2019-10-29 00:14:59
5	Arne Tobias Malkenes Ødegaard	184	Python 2	2015-12-06 23:13:37
6	a_b__c	188	Python 2	2021-01-10 10:45:04
7	Hidden user	195	Python 2	2019-11-19 22:40:49
8	Kasper Borys	202	Python 2	2016-10-01 19:44:38
9	Olaru Andreea	208	Python 2	2017-06-30 11:58:49
10	Peter Sofronas	209	Python 2	2017-08-06 21:30:10

#	User	Length	Language	Date
1	Chris Kopp	93	Python 3	2024-04-25 06:49:36
2	Nguyên Khôi Đỗ	94	Python 3	2025-01-22 02:18:09
3	Hidden user	94	Python 3	2025-01-27 20:33:18
4	Clement Oh	97	Python 3	2023-07-12 13:51:52
5	Jaydan Aladro	103	Python 3	2024-01-25 01:23:31
6	Mattéo Delabre	105	Python 3	2024-01-24 04:34:57
7	Tai Tze Kin	108	Python 3	2024-05-02 19:39:17
8	Guk Yi Siong	109	Python 3	2023-07-30 06:38:51
9	Gustav Elmqvist	112	Python 3	2023-02-12 19:23:55
10	Harry Zhang	114	Python 3	2023-01-05 17:04:49

#	User	Length	Language	Date
1	Thomas Feld	84	Ruby	2023-02-10 13:43:17
2	Russell Ng	87	Ruby	2025-05-24 23:54:54
3	Clement Oh	115	Ruby	2023-11-13 08:44:02
4	Hidden user	156	Ruby	2018-10-13 16:40:17
5	Casper Christensen	177	Ruby	2015-12-31 15:30:46
6	Savvas Alexandrou	188	Ruby	2018-12-15 19:20:44
7	Mehdi Maick	193	Ruby	2016-07-31 18:05:51
8	Mouad Naciri	210	Ruby	2017-04-09 15:26:00
9	Lasse Berglund	222	Ruby	2016-03-29 09:16:02
10	Hidden user	224	Ruby	2019-05-17 21:59:02

#	User	Length	Language	Date
1	Emil Dichmann	310	Rust	2025-09-27 09:13:06
2	Vincent Lagerros	328	Rust	2024-12-03 20:32:37
3	Artur Khuziakhmetov	333	Rust	2025-01-19 16:09:55
4	Bas Dirks	596	Rust	2022-01-04 14:07:24
5	Hidden user	609	Rust	16:14:54
6	Pankajkumar Patro	623	Rust	2024-08-02 22:40:43
7	Adrian	642	Rust	2025-06-17 16:17:22
8	Hidden user	745	Rust	2021-02-07 12:17:27
9	Metin Gülseven	767	Rust	2022-05-18 19:32:17
10	Joshua Freudenhammer	769	Rust	2025-07-26 21:21:37

#	User	Length	Language	Date
1	Nicolai Fredriksen	896	TypeScript	2025-06-17 16:30:55

#	User	Length	Language	Date
1	Jacob Minder	1104	Visual Basic	2025-03-27 02:00:17

#	User	Length	Language	Date
1	Joe Blower	1232	Zig	2025-05-17 02:55:54

Solution running time distribution