Problem I
Height Ordering — Problem Statistics

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Submissions	7445
Accepted submissions	3965
Submission ratio	53.26%
Authors	3667
Full solves [?]	3380
Full solve Ratio	92.17%

#	User	Runtime	Language	Date
1	Robert Low	0.02 s	C#	2016-07-15 16:47:54
2	Jens Mossig	0.02 s	C#	2017-02-19 09:47:46
3	Hidden user	0.02 s	C#	2017-11-28 23:14:57
4	Tom Roberts	0.03 s	C#	2015-11-05 15:32:29
5	Ugnius Skučas	0.03 s	C#	2016-10-14 11:04:58
6	Rasmus Brants	0.03 s	C#	2017-05-12 12:46:11
7	Patrik Hammersborg	0.03 s	C#	2018-01-13 20:29:10
8	Richard Lee	0.03 s	C#	2018-02-24 18:50:22
9	Zakary Kedrovsky	0.03 s	C#	2018-02-24 19:28:59
10	Jie Zheng	0.03 s	C#	2018-02-24 19:30:03

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.06 s	F#	2022-10-17 18:53:42

#	User	Runtime	Language	Date
1	Kiki Ibrahim	0.01 s	Go	2024-08-10 14:56:04
2	Krzysztof Gibuła	0.02 s	Go	2021-05-20 22:48:17
3	Norbert Voelker	0.02 s	Go	2021-05-22 19:59:07
4	Fredrik Liljedahl	0.27 s	Go	2016-01-21 10:35:08
5	Adam Evans	0.27 s	Go	2016-08-22 15:25:30
6	Hidden user	0.27 s	Go	2017-03-21 16:09:37

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.01 s	Haskell	2024-03-28 10:47:52
2	Sebastian Banert	0.01 s	Haskell	2025-02-17 17:29:51
3	Blake Hyde	0.04 s	Haskell	2015-11-14 03:21:21
4	Peter Deal	0.04 s	Haskell	2016-05-10 05:52:16
5	Matthew Johnson	0.04 s	Haskell	2017-02-14 18:53:02
6	Martin Jackson	0.04 s	Haskell	2017-04-09 00:03:59
7	César Antonio Carvajal de la Haza	0.04 s	Haskell	2017-05-01 13:58:27
8	Brent Yorgey	0.04 s	Haskell	2017-10-15 02:23:57
9	Hidden user	0.04 s	Haskell	2019-09-02 22:06:04
10	Intrets	0.04 s	Haskell	2019-09-06 12:19:57

#	User	Runtime	Language	Date
1	Nigel Quinn	0.07 s	Java	2018-03-16 19:03:51
2	Basil Roy	0.07 s	Java	2018-11-01 13:23:13
3	Sven Rönnbäck	0.07 s	Java	2021-12-23 12:59:10
4	Dat Vo Nguyen Tien	0.08 s	Java	2022-01-25 17:31:13
5	Orestis Foufris	0.09 s	Java	2016-07-12 23:24:48
6	Nick Wu	0.10 s	Java	2015-10-17 20:03:01
7	Salomon Smeke	0.10 s	Java	2015-10-19 02:30:31
8	Hanh Nguyen	0.10 s	Java	2015-10-21 05:13:51
9	Eskil Jarlskog	0.10 s	Java	2015-11-22 23:12:32
10	Omar Brome	0.10 s	Java	2015-11-23 18:59:12

#	User	Runtime	Language	Date
1	Andoko Chandra	0.45 s	JavaScript (Node.js)	2020-11-14 07:57:43
2	Niamh Limerick	0.46 s	JavaScript (Node.js)	2022-05-06 11:24:10

#	User	Runtime	Language	Date
1	Peter Kedemo	0.02 s	JavaScript (SpiderMonkey)	2015-12-18 21:33:18
2	Bjørn Chr. Soltvedt	0.03 s	JavaScript (SpiderMonkey)	2016-01-29 12:00:46
3	Caullen Sasnett	0.03 s	JavaScript (SpiderMonkey)	2018-02-24 20:34:45
4	Zach Tschetter	0.03 s	JavaScript (SpiderMonkey)	2023-06-19 21:41:58
5	Zachary DeStefano	0.04 s	JavaScript (SpiderMonkey)	2018-09-11 04:40:28
6	Jimmy Gustafsson	0.04 s	JavaScript (SpiderMonkey)	2024-08-14 13:06:13
7	Christian Pilegaard Cederquist	0.08 s	JavaScript (SpiderMonkey)	2023-01-31 18:30:51

#	User	Runtime	Language	Date
1	Timothy Gaede	0.57 s	Julia	2024-06-19 05:54:40
2	Danny Robinson	0.79 s	Julia	2023-11-19 11:01:13

#	User	Runtime	Language	Date
1	Johnny Baloney	0.22 s	Kotlin	2022-01-03 18:46:47
2	James WIlliams	0.27 s	Kotlin	2020-12-24 07:00:52
3	Adam Rankin	0.31 s	Kotlin	2023-08-30 23:32:31
4	Hidden user	0.33 s	Kotlin	2017-11-21 06:30:04
5	Dayan Ruben Gonzalez	0.33 s	Kotlin	2020-09-30 01:00:44
6	Hidden user	0.35 s	Kotlin	2020-06-02 16:29:33
7	Sergey Jakobsen	0.35 s	Kotlin	2021-10-19 23:03:05
8	Adam Koprowski	0.36 s	Kotlin	2020-08-20 09:02:03
9	Hidden user	0.36 s	Kotlin	2022-09-22 05:54:21
10	Phường Lên	0.39 s	Kotlin	2019-12-30 06:27:36

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Nim	2025-12-02 10:10:50

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	OCaml	2024-01-15 16:41:48

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2018-05-18 20:36:25
2	David Connolly	0.02 s	Pascal	2017-11-03 15:18:06

#	User	Runtime	Language	Date
1	Susanne Ragnemalm	0.02 s	PHP	2018-05-18 09:42:14

#	User	Runtime	Language	Date
1	Hadi Qovaizi	0.15 s	Prolog	2016-04-26 20:17:24
2	Hakan Kjellerstrand	0.18 s	Prolog	2023-03-06 19:22:12

#	User	Runtime	Language	Date
1	Asger Hautop Drewsen	0.05 s	Python 2	2015-11-02 22:34:16
2	Erik Sillén	0.05 s	Python 2	2015-12-14 21:21:51
3	Urban Pettersson	0.05 s	Python 2	2016-02-05 18:47:43
4	Alexander Teno	0.05 s	Python 2	2016-02-24 16:24:10
5	Alvaro Silvino	0.05 s	Python 2	2016-04-15 18:04:44
6	Bernhard Kartefla	0.05 s	Python 2	2016-09-30 18:52:55
7	Haggai Liu	0.05 s	Python 2	2017-01-20 05:43:40
8	Mathis Hammel	0.05 s	Python 2	2017-01-24 00:49:24
9	Muzakhir Amanzholov	0.05 s	Python 2	2017-02-08 00:09:41
10	Çağdaş Öztekin	0.05 s	Python 2	2017-09-06 23:09:58

#	User	Runtime	Language	Date
1	Wayne	0.03 s	Python 3	2016-01-26 22:03:55
2	Gregor Taube	0.04 s	Python 3	2016-07-09 14:10:45
3	Nathan Collins	0.04 s	Python 3	2016-08-15 17:25:01
4	Tore Norderud	0.04 s	Python 3	2016-10-29 14:56:39
5	Cian Ruane	0.04 s	Python 3	2017-03-07 19:08:10
6	Kaja Makovec	0.04 s	Python 3	2018-02-19 12:25:15
7	Matej Hlavacek	0.04 s	Python 3	2018-02-24 18:14:31
8	Stephen (Joe) Malone	0.04 s	Python 3	2018-02-24 19:46:38
9	Sergio Vieri	0.04 s	Python 3	2018-02-26 09:21:11
10	Nathan Helgeson	0.04 s	Python 3	2018-02-28 21:20:20

#	User	Runtime	Language	Date
1	Casper Christensen	0.05 s	Ruby	2016-01-07 22:54:58
2	Lasse Berglund	0.05 s	Ruby	2016-03-31 10:20:49
3	Erik Rydbert	0.05 s	Ruby	2016-07-12 17:31:13
4	Lee Tze Han	0.06 s	Ruby	2018-07-01 10:53:37
5	Hidden user	0.07 s	Ruby	2019-12-16 17:54:48
6	Thomas Feld	0.08 s	Ruby	2023-03-14 14:03:52
7	Matzuka	0.08 s	Ruby	2025-11-12 08:43:11

#	User	Length	Language	Date
1	Jesse Case	420	C	2022-01-02 19:57:27
2	Sambit Palit	461	C	2020-09-15 05:35:03
3	Anton Haglund	486	C	2016-12-05 16:24:26
4	Alvin Yan	492	C	2024-01-12 16:58:15
5	Mirel Cosulschi	494	C	2022-11-17 22:09:34
6	Larry D. Pyeatt	506	C	2015-10-17 23:14:26
7	Roberto Kreshna	509	C	2020-11-29 17:00:46
8	Andrew Roberts	513	C	2017-08-21 05:38:19
9	Sujan Roy	515	C	2020-05-09 20:28:25
10	Michael Malkiewicz	524	C	2016-10-16 20:30:08

#	User	Length	Language	Date
1	Leslie Yip	706	C#	2022-09-14 06:39:25
2	Vincent Tandya	718	C#	2021-06-23 08:53:18
3	Գոռ Բաղդասարյան	770	C#	2025-02-09 16:13:16
4	Göran Andersson	778	C#	2022-05-25 02:15:51
5	Robert Low	841	C#	2016-07-15 16:47:54
6	Shantanu Sharma	861	C#	2025-10-20 00:24:17
7	Esty Crow	881	C#	2024-09-27 11:40:37
8	Anthony Ye	935	C#	2024-11-01 20:47:36
9	Thomas Norris	1108	C#	2019-11-07 17:28:01
10	Patrik Hammersborg	1112	C#	2018-01-13 20:29:10

#	User	Length	Language	Date
1	Markus Mathiasen	299	C++	2021-08-22 10:09:34
2	William Gan	302	C++	2017-02-27 10:50:11
3	Antonio Molina Lovett	303	C++	2016-08-06 05:37:53
4	Jacob Wang	305	C++	2023-10-30 19:38:54
5	Cheru Turga	322	C++	2022-09-12 20:55:56
6	gabi	330	C++	2025-05-28 19:44:08
7	Syx Pek	331	C++	2016-01-30 11:52:03
8	Wong Shou Hong	332	C++	2021-04-17 07:00:00
9	林君彥	333	C++	2025-04-30 09:03:31
10	leul solomon	338	C++	2022-09-12 19:56:48

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	805	F#	2022-10-17 18:53:42

#	User	Length	Language	Date
1	Krzysztof Gibuła	529	Go	2021-05-20 22:48:17
2	Fredrik Liljedahl	882	Go	2016-01-21 10:35:08
3	Adam Evans	903	Go	2016-08-22 15:25:30
4	Kiki Ibrahim	993	Go	2024-08-10 14:56:04
5	Hidden user	1533	Go	2017-03-21 16:09:37
6	Norbert Voelker	1617	Go	2021-05-22 19:59:07

#	User	Length	Language	Date
1	Peter Deal	384	Haskell	2016-05-10 05:52:16
2	Sebastian Banert	427	Haskell	2025-02-17 17:29:51
3	Hidden user	496	Haskell	2023-01-19 01:16:13
4	Martin Jackson	513	Haskell	2017-04-09 00:03:59
5	Matthew Johnson	564	Haskell	2017-02-14 18:53:02
6	Brent Yorgey	669	Haskell	2017-10-15 02:23:57
7	Blake Hyde	700	Haskell	2015-11-14 03:21:21
8	Aiden Lara	717	Haskell	2024-02-23 02:25:45
9	Jan Hrček	842	Haskell	2021-03-27 17:54:57
10	Steinar Simonnes	887	Haskell	2024-03-28 10:47:52

#	User	Length	Language	Date
1	Doug Goodman	454	Java	2017-12-19 21:13:18
2	Austin Byers	494	Java	2015-10-17 19:06:11
3	Yeung Man Tsung	494	Java	2022-06-22 10:27:19
4	Lim Ting Kai	520	Java	2023-05-25 11:51:48
5	Frederick Vu	544	Java	2015-10-17 19:14:01
6	Lior Barak	547	Java	2017-12-02 02:37:17
7	Emilie Hyslop	558	Java	2022-01-07 06:19:14
8	Nanda Thant Sin	563	Java	2019-08-08 13:07:41
9	Shichen Zhang	566	Java	2020-12-17 04:24:11
10	Simon Xue	568	Java	2015-11-08 21:10:52

#	User	Length	Language	Date
1	Andoko Chandra	1151	JavaScript (Node.js)	2020-11-14 07:57:43
2	Niamh Limerick	1686	JavaScript (Node.js)	2022-05-06 11:24:10

#	User	Length	Language	Date
1	Jimmy Gustafsson	166	JavaScript (SpiderMonkey)	2024-08-14 13:06:13
2	Christian Pilegaard Cederquist	364	JavaScript (SpiderMonkey)	2023-01-31 18:30:51
3	Peter Kedemo	395	JavaScript (SpiderMonkey)	2015-12-18 21:33:18
4	Bjørn Chr. Soltvedt	459	JavaScript (SpiderMonkey)	2016-01-29 12:00:46
5	Zachary DeStefano	466	JavaScript (SpiderMonkey)	2018-09-11 04:40:28
6	Zach Tschetter	628	JavaScript (SpiderMonkey)	2023-06-19 21:41:58
7	Caullen Sasnett	876	JavaScript (SpiderMonkey)	2018-02-24 20:34:45

#	User	Length	Language	Date
1	Danny Robinson	199	Julia	2023-11-19 11:01:13
2	Timothy Gaede	942	Julia	2024-06-19 05:54:40

#	User	Length	Language	Date
1	Phường Lên	343	Kotlin	2019-12-30 06:27:36
2	Adam Koprowski	415	Kotlin	2020-08-20 09:02:03
3	Hidden user	532	Kotlin	2017-11-21 06:30:04
4	Hidden user	538	Kotlin	2020-06-02 16:29:33
5	Dayan Ruben Gonzalez	596	Kotlin	2020-09-30 01:00:44
6	Hidden user	648	Kotlin	2022-09-22 05:54:21
7	Adam Rankin	669	Kotlin	2023-08-30 23:32:31
8	Johnny Baloney	765	Kotlin	2022-01-03 19:06:51
9	Sergey Jakobsen	907	Kotlin	2021-10-19 23:02:36
10	Neil Harmon	1399	Kotlin	2019-07-11 11:41:42

#	User	Length	Language	Date
1	Hidden user	618	Nim	2025-12-02 10:10:50

#	User	Length	Language	Date
1	Hidden user	942	OCaml	2024-01-15 16:41:48

#	User	Length	Language	Date
1	Ingemar Ragnemalm	578	Pascal	2018-05-18 20:36:25
2	David Connolly	1383	Pascal	2017-11-03 15:18:06

#	User	Length	Language	Date
1	Susanne Ragnemalm	543	PHP	2018-05-18 09:42:14

#	User	Length	Language	Date
1	Hakan Kjellerstrand	542	Prolog	2023-03-06 19:22:12
2	Hadi Qovaizi	11320	Prolog	2016-04-26 20:17:24

#	User	Length	Language	Date
1	Muzakhir Amanzholov	196	Python 2	2017-02-08 00:09:41
2	Haggai Liu	209	Python 2	2017-01-20 05:43:40
3	Thomas Feld	212	Python 2	2019-09-05 16:28:29
4	Jesper Öqvist	225	Python 2	2018-10-27 10:33:41
5	Andreas Björklund	225	Python 2	2019-03-13 18:57:53
6	Snild Dolkow	236	Python 2	2015-10-18 11:19:21
7	Mathis Hammel	264	Python 2	2017-01-24 00:49:24
8	Asger Hautop Drewsen	273	Python 2	2015-11-02 22:34:16
9	Bernhard Kartefla	289	Python 2	2016-09-30 18:52:55
10	Hidden user	305	Python 2	2020-06-28 19:52:40

#	User	Length	Language	Date
1	Benjamin Z White	105	Python 3	2023-05-10 17:03:50
2	Clarence Chew	123	Python 3	2023-08-13 15:32:06
3	Per-Ivar Faust	130	Python 3	2023-09-11 19:32:53
4	Troels Bjerre Lund	136	Python 3	2021-04-22 18:59:05
5	Clement Oh	139	Python 3	2023-10-28 08:57:33
6	Andrew He	152	Python 3	2016-08-12 18:59:26
7	Hidden user	152	Python 3	2020-08-07 23:37:57
8	Farzam Abrishami	160	Python 3	2025-05-05 01:34:11
9	Bjørn Dons	164	Python 3	2018-10-03 01:05:44
10	Yifei Gong	165	Python 3	2023-10-11 16:05:34

#	User	Length	Language	Date
1	Thomas Feld	71	Ruby	2023-03-14 14:24:25
2	Hidden user	200	Ruby	2019-12-16 17:54:48
3	Erik Rydbert	295	Ruby	2016-07-12 17:31:13
4	Matzuka	309	Ruby	2025-11-12 08:43:11
5	Casper Christensen	441	Ruby	2016-01-07 22:54:58
6	Lee Tze Han	466	Ruby	2018-07-01 10:53:37
7	Lasse Berglund	545	Ruby	2016-03-31 10:20:49

#	User	Length	Language	Date
1	Vincent Lagerros	549	Rust	2025-01-17 10:57:48
2	Pankajkumar Patro	732	Rust	2024-11-03 18:15:45
3	Hidden user	775	Rust	2022-07-11 18:07:07
4	Bas Dirks	852	Rust	2022-02-09 12:04:11
5	Isak Jägberg	1022	Rust	2024-10-28 10:59:27
6	Harald Langslet Kavli	1065	Rust	2025-12-26 10:20:12
7	Hidden user	1102	Rust	2023-02-13 18:24:41
8	David Rasch	1213	Rust	2020-11-19 13:06:17
9	Louis Bouchard	1283	Rust	2024-11-03 02:51:52
10	Sherman Chann Zhi Shen	1427	Rust	2021-08-31 11:18:40

Solution running time distribution