Problem I
Train Boarding — Problem Statistics

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Submissions	1401
Accepted submissions	387
Submission ratio	27.62%
Authors	413
Full solves [?]	328
Full solve Ratio	79.42%

#	User	Runtime	Language	Date
1	Thomas Feld	0.08 s	APL	2023-08-02 14:22:48

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.00 s	C	2021-03-28 14:10:50
2	Max Nilsson	0.00 s	C	2021-07-06 00:13:35
3	Eyleifur Bjarkason	0.00 s	C	2021-09-12 23:55:53
4	Bhavya Alok	0.00 s	C	2023-11-21 14:46:54
5	Hidden user	0.00 s	C	2024-02-26 07:51:33
6	Mirel Cosulschi	0.00 s	C	2025-02-14 12:33:30

#	User	Runtime	Language	Date
1	Norbert Voelker	0.08 s	Go	2021-11-04 20:28:22

#	User	Runtime	Language	Date
1	Jason Hooper	0.01 s	Haskell	2021-03-29 02:43:53
2	Brent Yorgey	0.01 s	Haskell	2021-03-29 19:40:06
3	Isaac Arvestad	0.01 s	Haskell	2021-09-15 09:28:25
4	Hidden user	0.01 s	Haskell	2023-05-24 12:59:54

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.04 s	Java	2024-08-30 22:45:48
2	Donald Trump	0.04 s	Java	2025-11-26 23:24:18
3	Crystal Sharpe	0.06 s	Java	2021-04-08 02:45:01
4	Vu Minh Hieu	0.07 s	Java	2021-04-17 11:01:06
5	Ray Bai	0.07 s	Java	2021-12-08 19:47:27
6	Brandon Ou	0.07 s	Java	2021-12-08 19:50:48
7	Kevin Lim Yong Shen	0.07 s	Java	2022-04-25 10:20:42
8	Darshan Vekaria	0.07 s	Java	2022-10-22 19:35:21
9	Luke Blazing	0.07 s	Java	2022-12-05 20:07:43
10	Bjørn Dons	0.08 s	Java	2023-02-25 20:01:08

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.03 s	JavaScript (SpiderMonkey)	2021-03-31 12:46:23
2	Christian Pilegaard Cederquist	0.03 s	JavaScript (SpiderMonkey)	2023-08-03 18:15:51

#	User	Runtime	Language	Date
1	Hidden user	0.43 s	Julia	2025-04-08 19:17:57
2	Timothy Gaede	0.51 s	Julia	2026-01-09 14:14:23

#	User	Runtime	Language	Date
1	Jacob Huebner	0.13 s	Kotlin	2021-10-08 05:00:07
2	Nicholas Johnson	0.18 s	Kotlin	2021-10-07 05:29:12

#	User	Runtime	Language	Date
1	Jacob Albers	0.04 s	Python 3	2022-09-16 23:12:49
2	Greg Hamerly	0.04 s	Python 3	2022-10-11 18:28:15
3	Hidden user	0.04 s	Python 3	2025-07-27 05:06:37
4	Michael Goldwasser	0.04 s	Python 3	2025-10-23 09:12:38
5	Jimmy Dinh	0.04 s	Python 3	2025-11-05 19:06:55
6	Michael Wu	0.04 s	Python 3	2025-11-27 01:21:17
7	Matthew Strom	0.05 s	Python 3	2022-12-08 20:38:35
8	Ahmed Siadomar	0.05 s	Python 3	2023-02-23 18:48:03
9	Benjamin Z White	0.05 s	Python 3	2023-05-30 16:52:38
10	Josh Taylor	0.05 s	Python 3	2023-07-06 02:15:34

#	User	Runtime	Language	Date
1	Thomas Feld	0.09 s	Ruby	2023-08-02 13:49:20

#	User	Runtime	Language	Date
1	Niklas Sandén	0.00 s	Rust	2023-02-11 15:32:48
2	Calvin Gross	0.00 s	Rust	2026-01-15 21:56:11

#	User	Length	Language	Date
1	Thomas Feld	98	APL	2023-08-02 14:36:47

#	User	Length	Language	Date
1	Max Nilsson	887	C	2021-07-06 00:13:35
2	Mirel Cosulschi	1045	C	2025-02-14 12:33:30
3	Hidden user	1060	C	2024-02-26 07:51:33
4	Bergur Snorrason	1909	C	2021-03-28 14:10:50
5	Bhavya Alok	1925	C	2023-11-21 14:46:54
6	Eyleifur Bjarkason	8149	C	2021-09-12 23:55:53

#	User	Length	Language	Date
1	Zac Friggstad	328	C++	2021-04-12 17:18:35
2	Dmitry Lyubshin	385	C++	2023-04-10 17:56:26
3	Johan Wind	413	C++	2025-11-14 12:41:26
4	Atli Fannar Franklín	425	C++	2023-06-21 16:59:12
5	Frederick Pek	430	C++	2021-12-06 17:29:57
6	Erik Amirell Eklöf	437	C++	2021-09-15 17:20:07
7	Blake McLachlin	444	C++	2021-03-10 07:25:24
8	Grae Yeandle	458	C++	2021-07-24 17:31:53
9	Alexander Skidanov	458	C++	2025-02-16 15:22:59
10	Minseok Son	468	C++	2021-10-24 10:54:14

#	User	Length	Language	Date
1	Norbert Voelker	1147	Go	2021-11-04 20:31:21

#	User	Length	Language	Date
1	Isaac Arvestad	599	Haskell	2021-09-15 09:28:25
2	Hidden user	689	Haskell	2023-05-24 12:59:54
3	Jason Hooper	1938	Haskell	2021-03-29 02:43:53
4	Brent Yorgey	3764	Haskell	2021-03-29 19:40:06

#	User	Length	Language	Date
1	John Vincent Chua	830	Java	2023-06-10 19:33:12
2	Crystal Sharpe	864	Java	2021-04-08 02:45:01
3	Daniel Carlson	879	Java	2022-11-14 17:12:47
4	Doug Goodman	918	Java	2021-12-17 20:31:53
5	Satya Sai Rama Reddy Chinnam	930	Java	2024-11-08 19:18:55
6	Ethan Stanley	949	Java	2021-03-06 21:40:17
7	Brian Tan	995	Java	2022-10-22 22:12:54
8	Brandon Ou	999	Java	2021-12-08 19:50:48
9	Hidden user	1029	Java	2021-12-08 18:42:27
10	Kevin Lee	1056	Java	2021-12-08 21:34:05

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	615	JavaScript (SpiderMonkey)	2021-03-31 12:50:31
2	Christian Pilegaard Cederquist	685	JavaScript (SpiderMonkey)	2023-08-03 18:15:51

#	User	Length	Language	Date
1	Hidden user	161	Julia	2025-04-08 19:36:33
2	Timothy Gaede	604	Julia	2026-01-09 14:14:23

#	User	Length	Language	Date
1	Jacob Huebner	1251	Kotlin	2021-10-08 05:00:07
2	Nicholas Johnson	2690	Kotlin	2021-10-07 05:29:12

#	User	Length	Language	Date
1	Benjamin Z White	132	Python 3	2023-05-30 17:06:34
2	Michael Wu	137	Python 3	2025-11-27 01:27:43
3	Michael Goldwasser	143	Python 3	2025-10-23 09:12:38
4	Yong Mao	151	Python 3	2023-08-11 03:50:12
5	Zach Hacking	163	Python 3	2023-10-07 10:40:48
6	Shashank Bhatt	167	Python 3	2023-01-13 20:51:24
7	Wen Li Looi	195	Python 3	2021-04-03 20:00:40
8	Rafael Kristoforus Yanto	213	Python 3	2025-05-09 23:24:39
9	Hidden user	217	Python 3	2022-11-13 20:01:50
10	Ryan Farrell	218	Python 3	2023-10-01 06:22:21

#	User	Length	Language	Date
1	Thomas Feld	132	Ruby	2023-08-02 13:52:52

#	User	Length	Language	Date
1	Calvin Gross	1406	Rust	2026-01-15 21:56:11
2	Niklas Sandén	26155	Rust	2023-02-11 15:32:48

Solution running time distribution