Problem A
Closing the Borders — Problem Statistics

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Submissions	253
Accepted submissions	54
Submission ratio	21.34%
Authors	71
Full solves [?]	43
Full solve Ratio	60.56%

#	User	Runtime	Language	Date
1	Doug Goodman	0.24 s	Java	2020-05-02 15:27:44

#	User	Runtime	Language	Date
1	Björn Magnusson	0.10 s	Python 2	2020-03-20 18:25:52
2	Hidden user	0.16 s	Python 2	2020-03-22 22:38:55
3	Andreas Björklund	0.17 s	Python 2	2020-03-23 18:00:05

#	User	Runtime	Language	Date
1	Duoduo Zhao	0.06 s	Python 3	2025-09-04 08:13:03
2	Måns Magnusson	0.10 s	Python 3	2020-03-20 18:27:22
3	Sebastian Hjelm	0.10 s	Python 3	2020-03-20 19:07:42
4	Thore Husfeldt	0.16 s	Python 3	2020-03-25 11:41:42
5	Finn Stoldt	0.16 s	Python 3	2020-04-10 16:09:57
6	Oskar Haarklou Veileborg	0.19 s	Python 3	2020-04-03 08:55:55
7	Shawn Lindbergh	0.33 s	Python 3	2020-09-14 04:43:19
8	Jonatan Nilsson	0.36 s	Python 3	2020-03-21 10:48:15
9	Nicole Hedblom	0.52 s	Python 3	2020-03-20 19:32:10

#	User	Runtime	Language	Date
1	Daniel Anker Hermansen	0.00 s	Rust	2023-08-26 00:40:04

#	User	Length	Language	Date
1	Dmitry Lyubshin	751	C++	2023-06-17 13:08:29
2	Jeremy Lim	840	C++	2023-12-17 11:17:22
3	Hidden user	934	C++	2024-12-28 15:21:07
4	Cameron Custer	1014	C++	2023-05-12 04:55:49
5	Johan Sannemo	1083	C++	2020-09-05 16:12:39
6	Erik Amirell Eklöf	1143	C++	2020-03-20 18:33:51
7	Simon Lindholm	1163	C++	2020-09-07 14:42:22
8	Marcel Wienöbst	1307	C++	2020-03-27 16:27:32
9	Seba Villalobos	1332	C++	2023-05-11 18:52:39
10	Hugo Eberhard	1349	C++	2020-03-20 19:03:29

#	User	Length	Language	Date
1	Doug Goodman	1937	Java	2020-05-02 15:27:44

#	User	Length	Language	Date
1	Björn Magnusson	860	Python 2	2020-03-20 18:25:52
2	Hidden user	919	Python 2	2020-03-22 22:38:55
3	Andreas Björklund	947	Python 2	2020-03-23 18:00:05

#	User	Length	Language	Date
1	Shawn Lindbergh	668	Python 3	2020-09-14 04:43:19
2	Thore Husfeldt	717	Python 3	2020-03-25 11:42:48
3	Oskar Haarklou Veileborg	765	Python 3	2020-04-03 08:55:55
4	Nicole Hedblom	851	Python 3	2020-03-20 19:32:10
5	Jonatan Nilsson	1041	Python 3	2020-03-21 10:48:15
6	Måns Magnusson	1065	Python 3	2020-03-20 18:27:22
7	Finn Stoldt	1316	Python 3	2020-04-10 16:09:57
8	Sebastian Hjelm	1728	Python 3	2020-03-20 19:07:42
9	Duoduo Zhao	2502	Python 3	2025-09-04 08:13:03

#	User	Length	Language	Date
1	Daniel Anker Hermansen	28557	Rust	2023-08-26 00:40:04

Solution running time distribution