Problem I
Keeping On Track — Problem Statistics

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Submissions	793
Accepted submissions	319
Submission ratio	40.23%
Authors	268
Full solves [?]	229
Full solve Ratio	85.45%

#	User	Runtime	Language	Date
1	Ryan Maschino	0.17 s	C	2023-10-20 02:45:26
2	Ivan Petrov	0.50 s	C	2019-12-11 13:16:20

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.06 s	Java	2024-08-01 10:43:09
2	Jimmy Dinh	0.11 s	Java	2023-10-12 06:48:13
3	Anh Mai Le Xuan	0.14 s	Java	2018-10-13 19:24:53
4	Måns Magnusson	0.15 s	Java	2018-09-16 13:19:53
5	Maj Stenmark	0.15 s	Java	2018-09-27 14:41:43
6	Jeffrey H.	0.17 s	Java	2023-07-09 18:51:56
7	Taras Romanyuk	0.17 s	Java	2025-01-23 23:03:06
8	Lewin Gan	0.18 s	Java	2017-10-28 17:09:11
9	Richard Peng	0.18 s	Java	2017-12-09 21:37:09
10	William Walker	0.19 s	Java	2023-07-10 06:56:03

#	User	Runtime	Language	Date
1	Jacob Huebner	0.18 s	Kotlin	2021-04-13 03:02:18
2	Слава Гуляев	0.24 s	Kotlin	2017-11-15 11:14:24
3	Hidden user	0.26 s	Kotlin	2020-02-15 00:48:37
4	Nicholas Johnson	0.26 s	Kotlin	2021-04-13 23:05:36
5	Phường Lên	0.27 s	Kotlin	2020-02-15 04:24:42
6	Kiel Dowdle	1.00 s	Kotlin	2021-04-13 23:27:19

#	User	Runtime	Language	Date
1	Robert Kramer	0.07 s	Python 2	2017-10-29 21:55:55
2	Wyatt Wismer	0.08 s	Python 2	2017-11-01 19:59:28
3	Daniel Wolff	0.08 s	Python 2	2017-11-03 02:00:45
4	Lars Åström	0.09 s	Python 2	2019-09-24 12:14:29
5	Godmar Back	0.53 s	Python 2	2018-10-14 20:28:22

#	User	Runtime	Language	Date
1	Owen Strength	0.06 s	Python 3	2025-09-29 22:10:16
2	Eimhin McDonald	0.08 s	Python 3	2018-07-30 22:06:14
3	Mohammed Raeesul Irfan Riaz Ahmed	0.08 s	Python 3	2024-11-03 21:11:48
4	Daniel Bogorad	0.08 s	Python 3	2025-09-07 18:11:48
5	Lawry Sorenson	0.09 s	Python 3	2024-11-15 02:07:35
6	Pratyanch Jain	0.11 s	Python 3	2023-10-31 22:28:47
7	Kyle Layzer	0.12 s	Python 3	2024-01-25 02:09:04
8	Isaac Lee	0.13 s	Python 3	2022-01-18 22:41:20
9	Oskar Haarklou Veileborg	0.14 s	Python 3	2020-04-03 11:56:17
10	Nicholas Russell Saerang	0.14 s	Python 3	2023-08-16 18:28:29

#	User	Runtime	Language	Date
1	Zhixing Zhang	0.00 s	Rust	2020-04-18 09:12:36

#	User	Length	Language	Date
1	Ivan Petrov	2035	C	2019-12-11 13:16:20
2	Ryan Maschino	5006	C	2023-10-20 02:48:55

#	User	Length	Language	Date
1	Teikn Smith	718	C++	2024-10-18 02:46:38
2	William Gan	782	C++	2018-04-12 08:14:03
3	Hidden user	789	C++	2017-10-28 16:49:11
4	Muhammad Ayaz Dzulfikar	910	C++	2018-10-05 13:16:46
5	Josenildo Silva	954	C++	2020-04-30 00:48:47
6	Pu Chen	970	C++	2017-11-10 19:49:58
7	Farbod Yadegarian	1028	C++	2017-10-28 16:51:14
8	Frank Boar	1034	C++	2017-11-04 02:08:33
9	Alex Dai	1083	C++	2017-11-24 10:56:14
10	Paul Baldaray	1105	C++	2021-01-12 23:29:08

#	User	Length	Language	Date
1	Alex Coleman	1417	Java	2017-11-03 20:12:56
2	Trung Quan Tong Dam	1636	Java	2018-01-22 22:16:49
3	Doug Goodman	1718	Java	2019-05-31 14:13:08
4	Nathaniel Lahn	1856	Java	2018-10-13 20:28:02
5	Crystal Sharpe	2014	Java	2021-08-08 21:24:44
6	Ray Bai	2035	Java	2020-12-12 17:35:11
7	Måns Magnusson	2037	Java	2018-09-16 13:19:53
8	Maj Stenmark	2037	Java	2018-09-27 14:41:43
9	Suhas T. Nagar	2102	Java	2022-05-25 21:42:42
10	Shoutian Liu	2299	Java	2019-10-21 19:51:34

#	User	Length	Language	Date
1	Phường Lên	1404	Kotlin	2020-02-15 04:24:42
2	Hidden user	2118	Kotlin	2020-02-15 00:48:37
3	Слава Гуляев	2191	Kotlin	2017-11-15 11:14:24
4	Jacob Huebner	2247	Kotlin	2021-04-13 03:02:18
5	Nicholas Johnson	2878	Kotlin	2021-04-13 22:02:25
6	Kiel Dowdle	3392	Kotlin	2021-04-13 23:27:19

#	User	Length	Language	Date
1	Lars Åström	739	Python 2	2019-09-24 12:14:29
2	Wyatt Wismer	1060	Python 2	2017-11-01 19:59:28
3	Godmar Back	1098	Python 2	2018-10-14 20:28:22
4	Daniel Wolff	1155	Python 2	2017-11-03 02:00:45
5	Robert Kramer	2274	Python 2	2017-10-29 21:55:55

#	User	Length	Language	Date
1	Lawry Sorenson	695	Python 3	2024-11-15 02:07:35
2	Oskar Haarklou Veileborg	759	Python 3	2020-04-03 12:02:09
3	Daniel Bogorad	790	Python 3	2025-09-07 18:11:48
4	Mohammed Raeesul Irfan Riaz Ahmed	855	Python 3	2024-11-03 21:11:48
5	Nicholas Russell Saerang	1007	Python 3	2023-08-16 18:28:29
6	Albert Chu	1025	Python 3	2021-01-16 20:51:55
7	Eimhin McDonald	1081	Python 3	2018-07-30 22:06:14
8	Owen Strength	1152	Python 3	2025-09-29 22:10:46
9	Timothy Han	1276	Python 3	2020-12-13 22:35:59
10	Taesung Hwang	1383	Python 3	2023-10-23 00:26:57

#	User	Length	Language	Date
1	Zhixing Zhang	3789	Rust	2020-04-18 09:12:36

Solution running time distribution