Problem A
Train Passengers — Problem Statistics

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Submissions	13933
Accepted submissions	4198
Submission ratio	30.13%
Authors	3792
Full solves [?]	3360
Full solve Ratio	88.61%

#	User	Runtime	Language	Date
1	Charlie Forsberg Hedberg	0.01 s	C#	2015-07-07 07:30:59
2	Martin Nyström	0.01 s	C#	2016-12-20 16:00:40
3	Mousami Chand	0.01 s	C#	2018-05-30 07:40:31
4	Hidden user	0.01 s	C#	2018-05-30 08:14:18
5	Adam Bergholtz	0.01 s	C#	2018-05-31 09:52:32
6	Jonas Stensiö	0.01 s	C#	2018-05-31 11:34:22
7	Αναστάσιος Θωμαΐδης	0.01 s	C#	2018-06-01 12:27:24
8	Bas te Kolste	0.02 s	C#	2014-10-04 12:14:03
9	Ayk Stepanyan	0.02 s	C#	2014-10-05 17:46:38
10	masosz	0.02 s	C#	2015-01-20 21:54:43

#	User	Runtime	Language	Date
1	David Cawthon	0.02 s	Common Lisp	2019-05-28 00:42:08
2	Hidden user	0.02 s	Common Lisp	2019-06-11 04:59:22

#	User	Runtime	Language	Date
1	Mads Jespersen	0.04 s	F#	2020-03-08 22:03:58
2	Jacob Harris Cryer Kragh	0.04 s	F#	2023-03-27 15:38:14

#	User	Runtime	Language	Date
1	Chris Vilches	0.00 s	Go	2024-08-16 17:59:45
2	Jinwoo Lee	0.07 s	Go	2018-12-23 18:51:06
3	Norbert Voelker	0.07 s	Go	2021-04-07 14:17:01
4	Nicolai Skogheim	0.08 s	Go	2016-09-29 16:29:04
5	Miguel Martinez	0.08 s	Go	2019-07-22 10:44:19
6	Olof Gren	0.08 s	Go	2019-11-19 18:05:54
7	Ainun Nazieb	0.08 s	Go	2020-08-28 00:45:58
8	Magix	0.08 s	Go	2020-09-16 09:51:43
9	Krzysztof Gibuła	0.08 s	Go	2021-02-23 15:45:19
10	Fei Dong	0.08 s	Go	2022-03-25 14:55:46

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.04 s	Java	2024-08-31 11:20:15
2	Hidden user	0.04 s	Java	2024-09-28 03:10:48
3	Antipov Andrew	0.05 s	Java	2014-10-04 09:35:00
4	Mattis Kancans Envall	0.05 s	Java	2014-10-04 14:03:50
5	Axel Lewenhaupt	0.05 s	Java	2014-10-04 14:05:28
6	Filip Buszko	0.05 s	Java	2014-10-04 14:51:19
7	Jimmy Mårdell	0.05 s	Java	2014-12-23 09:04:37
8	Henrik Sandström	0.05 s	Java	2015-02-08 20:22:40
9	Edward Kim	0.05 s	Java	2015-03-14 17:44:05
10	Yixin Tao	0.05 s	Java	2015-03-14 18:51:27

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	JavaScript (Node.js)	2019-03-01 16:54:00
2	Sander Hellesø	0.05 s	JavaScript (Node.js)	2019-04-20 21:39:37
3	Bálint Tasnádi	0.09 s	JavaScript (Node.js)	2023-03-08 16:22:04
4	Natna Mebrahtu	0.09 s	JavaScript (Node.js)	2023-04-07 19:35:38
5	Hidden user	0.09 s	JavaScript (Node.js)	2023-04-21 21:31:26
6	Jose Cervantes	0.41 s	JavaScript (Node.js)	2020-03-12 05:11:49
7	Swetabh Subham	0.41 s	JavaScript (Node.js)	2021-01-09 22:55:15
8	Kristin Dahlén	0.42 s	JavaScript (Node.js)	2020-02-17 10:24:20
9	Andoko Chandra	0.42 s	JavaScript (Node.js)	2020-10-14 06:47:11
10	William Jessop	0.42 s	JavaScript (Node.js)	2021-03-02 00:25:25

#	User	Runtime	Language	Date
1	Hinse ter Schuur	0.01 s	JavaScript (SpiderMonkey)	2015-11-26 20:52:02
2	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2015-12-21 00:08:34
3	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-04-03 13:34:25
4	Hà Minh Ngọc	0.01 s	JavaScript (SpiderMonkey)	2016-07-26 11:26:26
5	Krishna Vishal D	0.01 s	JavaScript (SpiderMonkey)	2017-08-15 21:16:10
6	Peter Menyes	0.02 s	JavaScript (SpiderMonkey)	2021-09-24 20:32:05
7	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-06-05 06:53:25

#	User	Runtime	Language	Date
1	Timothy Gaede	0.50 s	Julia	2024-04-30 11:11:25

#	User	Runtime	Language	Date
1	Huiren Woo	0.11 s	Kotlin	2020-07-11 07:01:53
2	Johnny Baloney	0.13 s	Kotlin	2021-12-02 11:04:50
3	James WIlliams	0.15 s	Kotlin	2020-09-07 18:50:24
4	Dayan Ruben Gonzalez	0.15 s	Kotlin	2020-09-30 00:56:53
5	Benjamin Laurence Erickson	0.16 s	Kotlin	2019-01-11 14:57:56
6	Aksel Holbek Sørbye	0.17 s	Kotlin	2022-09-29 14:18:57
7	Neil Harmon	0.18 s	Kotlin	2019-10-18 10:40:57
8	Dmitry Shostak	0.18 s	Kotlin	2020-07-15 08:44:04
9	Sergey Jakobsen	0.19 s	Kotlin	2021-03-13 14:06:05
10	Ahmed Waseem Saeed	0.19 s	Kotlin	2021-12-22 16:31:09

#	User	Runtime	Language	Date
1	Peter Hairatidis	0.00 s	Lua	2025-10-07 21:12:01

#	User	Runtime	Language	Date
1	Nguyen Hoang Trung	0.00 s	Pascal	2017-06-18 03:15:59
2	Ingemar Ragnemalm	0.00 s	Pascal	2017-09-14 06:27:22

#	User	Runtime	Language	Date
1	Silvena Lam	0.01 s	PHP	2016-06-06 09:26:35
2	Susanne Ragnemalm	0.01 s	PHP	2018-05-22 17:16:23
3	Daniel Savov	0.01 s	PHP	2020-09-17 14:38:29

#	User	Runtime	Language	Date
1	Aleksander Burkow	0.02 s	Python 2	2014-10-04 09:36:36
2	Hidden user	0.02 s	Python 2	2014-10-04 09:38:16
3	When the NULL Breaks	0.02 s	Python 2	2014-10-04 10:32:31
4	Magnus Hagmar	0.02 s	Python 2	2014-10-04 11:42:18
5	Hidden user	0.02 s	Python 2	2014-10-04 21:01:52
6	Hidden user	0.02 s	Python 2	2014-10-06 10:15:37
7	Jacob Wejendorp	0.02 s	Python 2	2014-10-26 17:31:23
8	Erik Fredriksen	0.02 s	Python 2	2014-11-28 17:32:23
9	Erik Jansson	0.02 s	Python 2	2014-12-09 17:12:10
10	Jonas Kylling	0.02 s	Python 2	2014-12-13 17:50:12

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	Python 3	2014-10-08 07:19:30
2	Patrick Johannessen	0.02 s	Python 3	2014-10-29 11:12:44
3	Brian Harrington	0.02 s	Python 3	2015-02-23 23:43:34
4	Martin Stensgård	0.02 s	Python 3	2015-03-15 23:05:16
5	Nils Gustafsson	0.02 s	Python 3	2015-03-25 20:09:26
6	Fredrik Carlsen	0.02 s	Python 3	2015-06-07 23:21:32
7	James Elías Sigurðarson	0.02 s	Python 3	2015-06-11 13:08:40
8	Johannes Agestam	0.02 s	Python 3	2015-06-14 22:30:56
9	John Harrison	0.02 s	Python 3	2015-09-18 15:32:12
10	Victor Zheng	0.02 s	Python 3	2015-10-04 03:07:48

#	User	Runtime	Language	Date
1	Lasse Berglund	0.03 s	Ruby	2016-04-22 09:58:37
2	Sebastian Craig	0.03 s	Ruby	2016-10-19 23:42:11
3	Mridula Prabhu	0.03 s	Ruby	2017-06-04 09:56:26
4	Hidden user	0.05 s	Ruby	2021-07-04 11:05:38
5	Kok Dith	0.05 s	Ruby	2021-08-23 12:42:08
6	Marie Cornellier	0.05 s	Ruby	2021-09-03 01:48:50
7	Thomas Feld	0.06 s	Ruby	2023-03-29 11:55:59
8	Russell Ng	0.07 s	Ruby	2025-06-05 04:05:06

#	User	Length	Language	Date
1	Jeroen Bransen	469	C	2014-10-06 09:25:17
2	Lawrence Li	496	C	2016-01-10 15:32:56
3	Michal Kouril	523	C	2014-10-11 19:36:51
4	Sambit Palit	528	C	2020-10-19 00:20:39
5	Simon M. Binyamin	534	C	2018-01-04 13:10:20
6	PhilCampbell	538	C	2021-01-23 16:45:24
7	Bryan Heryanto	541	C	2019-10-02 09:08:25
8	Ivan Petrov	550	C	2019-05-31 11:23:59
9	Andrew Roberts	582	C	2017-09-12 23:31:25
10	Seth Carter	614	C	2020-09-03 21:24:24

#	User	Length	Language	Date
1	Johan Ahlrik	704	C#	2023-07-05 20:59:48
2	Jonas Stensiö	763	C#	2018-05-31 11:34:22
3	Hidden user	765	C#	2018-05-31 13:05:01
4	Liam Percy	808	C#	2018-09-27 22:21:13
5	ANTON ERIKSSON	908	C#	2023-04-12 12:52:09
6	Marek Bina	927	C#	2019-02-18 16:25:13
7	Doug Goodman	932	C#	2018-07-06 21:30:24
8	Bahareh C Takaldani	979	C#	2023-02-06 05:56:21
9	Göran Andersson	1015	C#	2022-05-20 22:07:20
10	Hidden user	1051	C#	2021-07-07 12:44:53

#	User	Length	Language	Date
1	Mugeon Kim	272	C++	2024-01-27 09:55:38
2	Antonio Molina Lovett	313	C++	2016-08-07 09:02:59
3	Hidden user	315	C++	2023-08-26 17:43:44
4	Herman Karlsson	326	C++	2015-02-08 11:22:22
5	David Wärn	331	C++	2015-04-21 14:54:32
6	Zane Yu	346	C++	2018-12-03 14:36:16
7	Johan Wind	362	C++	2015-05-15 15:07:08
8	Joshua Chan	376	C++	2016-07-30 06:27:42
9	Hidden user	377	C++	2023-04-28 01:38:34
10	Đoàn Công Chính	381	C++	2018-01-17 23:57:22

#	User	Length	Language	Date
1	Hidden user	570	Common Lisp	2019-06-11 04:59:22
2	David Cawthon	1358	Common Lisp	2019-05-28 00:42:08

#	User	Length	Language	Date
1	Mads Jespersen	1036	F#	2020-03-08 22:03:58
2	Jacob Harris Cryer Kragh	1769	F#	2023-03-27 15:38:14

#	User	Length	Language	Date
1	Chris Vilches	483	Go	2024-08-16 17:59:45
2	Fei Dong	531	Go	2022-03-25 14:55:46
3	Olof Gren	678	Go	2019-11-19 18:05:54
4	Ainun Nazieb	785	Go	2020-08-28 00:45:58
5	Krzysztof Gibuła	814	Go	2021-02-23 15:45:19
6	Miguel Martinez	815	Go	2019-07-22 10:44:19
7	Nicolai Skogheim	845	Go	2016-09-29 16:29:04
8	Norbert Voelker	1050	Go	2021-04-07 14:17:01
9	Jinwoo Lee	1153	Go	2018-12-23 18:51:06
10	Magix	1546	Go	2020-09-16 09:51:43

#	User	Length	Language	Date
1	Li Jun	437	Haskell	2023-06-27 16:30:42
2	Lukas Polacek	501	Haskell	2015-07-09 19:02:29
3	Shinji Koshida	530	Haskell	2025-01-21 20:33:51
4	Matthew Johnson	531	Haskell	2017-05-02 19:07:01
5	Caleb Surovik	575	Haskell	2021-07-18 03:11:30
6	David Wärn	578	Haskell	2015-10-09 12:30:10
7	Qi Ji	693	Haskell	2018-12-27 19:06:57
8	Lars Tveito	728	Haskell	2015-08-28 20:54:59
9	Mason Barnhill	795	Haskell	2023-04-22 16:36:26
10	David Zacek	799	Haskell	2021-07-09 19:19:14

#	User	Length	Language	Date
1	Sven Bergius	533	Java	2017-11-23 18:45:33
2	Doug Goodman	546	Java	2018-06-04 14:14:12
3	Natalie Longtin	566	Java	2017-10-30 19:10:25
4	Brennan Cleland	578	Java	2023-06-27 23:34:35
5	Kiên Nguyễn Tiến Trung	581	Java	2017-01-15 11:08:40
6	Likhitha Sadavala	596	Java	2022-07-25 17:07:12
7	Liu Boyu	606	Java	2019-09-08 13:06:01
8	Hidden user	607	Java	2017-11-24 23:20:40
9	Linghao Dai	610	Java	2019-09-03 14:32:42
10	Dai Linghao	610	Java	2019-09-03 14:33:39

#	User	Length	Language	Date
1	Natna Mebrahtu	840	JavaScript (Node.js)	2023-04-07 19:35:38
2	Chris Wong	878	JavaScript (Node.js)	2021-03-13 17:08:54
3	Sander Hellesø	1176	JavaScript (Node.js)	2019-04-20 21:39:37
4	Jose Cervantes	1176	JavaScript (Node.js)	2020-03-12 05:11:49
5	William Jessop	1415	JavaScript (Node.js)	2021-03-02 00:25:25
6	Swetabh Subham	1449	JavaScript (Node.js)	2021-01-09 22:55:15
7	Andoko Chandra	1488	JavaScript (Node.js)	2020-10-14 06:47:11
8	Kristin Dahlén	1535	JavaScript (Node.js)	2020-02-17 10:24:20
9	Bálint Tasnádi	1606	JavaScript (Node.js)	2023-03-08 16:22:04
10	Niamh Limerick	1706	JavaScript (Node.js)	2022-03-25 14:57:02

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	312	JavaScript (SpiderMonkey)	2016-04-03 13:34:25
2	Peter Menyes	505	JavaScript (SpiderMonkey)	2021-09-24 20:32:05
3	Christian Pilegaard Cederquist	546	JavaScript (SpiderMonkey)	2023-06-05 06:53:25
4	Peter Kedemo	784	JavaScript (SpiderMonkey)	2015-12-21 00:08:34
5	Hà Minh Ngọc	897	JavaScript (SpiderMonkey)	2016-07-26 11:26:26
6	Hinse ter Schuur	924	JavaScript (SpiderMonkey)	2015-11-26 20:52:02
7	Krishna Vishal D	955	JavaScript (SpiderMonkey)	2017-08-15 21:16:10

#	User	Length	Language	Date
1	Timothy Gaede	747	Julia	2024-04-30 11:11:25

#	User	Length	Language	Date
1	Dmitry Shostak	515	Kotlin	2020-07-15 08:44:04
2	Dayan Ruben Gonzalez	583	Kotlin	2020-09-30 00:56:53
3	Aksel Holbek Sørbye	648	Kotlin	2022-09-29 14:18:57
4	Adam Rankin	690	Kotlin	2023-08-25 22:04:27
5	Sergey Jakobsen	711	Kotlin	2021-03-13 14:06:05
6	Benjamin Laurence Erickson	722	Kotlin	2019-01-11 14:57:56
7	Ahmed Waseem Saeed	1034	Kotlin	2021-12-22 16:31:09
8	Troy Warmboe	1077	Kotlin	2020-03-05 21:13:58
9	Johnny Baloney	1258	Kotlin	2021-12-02 11:04:50
10	Neil Harmon	1335	Kotlin	2019-10-18 10:40:57

#	User	Length	Language	Date
1	Peter Hairatidis	1425	Lua	2025-10-07 21:12:01

#	User	Length	Language	Date
1	Nguyen Hoang Trung	434	Pascal	2017-06-18 03:15:59
2	Ingemar Ragnemalm	870	Pascal	2017-09-14 06:27:22

#	User	Length	Language	Date
1	Susanne Ragnemalm	656	PHP	2018-05-22 17:16:23
2	Daniel Savov	1219	PHP	2020-09-17 14:38:29
3	Silvena Lam	1387	PHP	2016-06-06 09:52:44

#	User	Length	Language	Date
1	Thomas Feld	194	Python 2	2019-08-23 08:14:48
2	Erik Odenman	283	Python 2	2015-05-10 15:48:04
3	Andreas Björklund	288	Python 2	2019-05-08 19:09:24
4	Jesper Öqvist	293	Python 2	2018-11-02 16:51:24
5	Nicole Hedblom	315	Python 2	2015-07-15 08:00:01
6	Adam Stuart Richardson	343	Python 2	2015-03-14 17:21:05
7	Eoin Davey	366	Python 2	2017-10-17 22:36:30
8	Haggai Liu	367	Python 2	2017-10-26 03:30:58
9	Hidden user	370	Python 2	2014-10-04 21:01:52
10	Jeff Robertson	370	Python 2	2016-10-04 00:01:17

#	User	Length	Language	Date
1	Charles Ancheta	147	Python 3	2023-03-25 06:32:25
2	Sarek Høverstad Skotåm	151	Python 3	2022-10-01 01:19:58
3	Nino Bašić	172	Python 3	2023-01-08 19:42:14
4	Michael Goldwasser	177	Python 3	2025-08-28 04:24:07
5	Farzam Abrishami	217	Python 3	2024-01-28 18:56:33
6	Ahmed Chamseddine	226	Python 3	2025-01-02 20:43:21
7	Yong Mao	248	Python 3	2023-04-14 12:09:15
8	Thibault Raffaillac	268	Python 3	2020-01-29 07:33:33
9	Lim Dewen, Aloysius	269	Python 3	2021-05-03 15:33:33
10	Lee Isaac	284	Python 3	2021-12-03 23:59:31

#	User	Length	Language	Date
1	Thomas Feld	117	Ruby	2023-03-29 11:59:07
2	Russell Ng	126	Ruby	2025-06-05 04:05:06
3	Hidden user	245	Ruby	2021-07-04 11:05:38
4	Kok Dith	400	Ruby	2021-08-23 12:42:08
5	Lasse Berglund	617	Ruby	2016-04-22 09:58:37
6	Marie Cornellier	631	Ruby	2021-09-03 01:48:50
7	Sebastian Craig	1119	Ruby	2016-10-19 23:42:11
8	Mridula Prabhu	1257	Ruby	2017-06-04 09:56:26

#	User	Length	Language	Date
1	Artur Khuziakhmetov	577	Rust	2025-11-05 14:18:15
2	Bas Dirks	934	Rust	2022-01-07 08:30:06
3	Hidden user	934	Rust	2022-12-27 00:27:15
4	David Rasch	948	Rust	2021-05-03 10:42:16
5	Ishtiaq Hussain Naqi	1116	Rust	2023-10-22 18:02:54
6	Adam Gausmann	1422	Rust	2018-11-14 23:06:08
7	jaswanth	1654	Rust	2024-03-13 14:07:11
8	Maurice Makaay	1841	Rust	2022-11-29 09:58:14
9	Eskil Queseth	1864	Rust	2019-11-19 18:01:08
10	Hidden user	1945	Rust	2023-10-13 18:46:01

Solution running time distribution