Problem A
Lost Map — Problem Statistics

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Submissions	12823
Accepted submissions	6346
Submission ratio	49.49%
Authors	4329
Accepted authors	4018
Author ratio	92.82%

#	User	Runtime	Language	Date
1	Ian Soo	0.57 s	C	2020-11-05 08:07:09
2	Hidden user	0.64 s	C	2024-12-15 22:54:05
3	Ivan Petrov	0.68 s	C	2017-11-30 09:44:28
4	Kevin Wu	1.28 s	C	2020-03-29 12:27:34
5	Samuel Deutsch	1.28 s	C	2020-11-03 09:25:56
6	Hamza Rashid	1.38 s	C	2024-11-12 17:29:17
7	Max Nilsson	1.53 s	C	2022-05-06 14:27:50
8	Jeroen Jongkees	2.15 s	C	2023-04-13 22:16:48
9	pengin	2.57 s	C	2021-08-31 13:52:33

#	User	Runtime	Language	Date
1	Artemy Gavrilov	1.84 s	C#	2024-04-08 06:30:11
2	Mikael Fiala-Lundström	2.63 s	C#	2021-11-11 00:57:34
3	Ben-Richard Ebbesvik	2.87 s	C#	2023-12-22 23:32:34
4	Nils Lenart	3.98 s	C#	2020-03-31 11:28:53

#	User	Runtime	Language	Date
1	Zhang Jikun	0.09 s	C++	2022-07-27 00:42:23
2	Øyvind Almli	0.12 s	C++	2022-02-08 11:24:15
3	Agis Daniels	0.12 s	C++	2022-02-24 16:43:29
4	Troels Bjerre Lund	0.17 s	C++	2021-04-19 09:02:56
5	Alexander Kravberg	0.19 s	C++	2024-02-04 13:49:23
6	孫奇霆	0.26 s	C++	2025-03-24 08:23:07
7	Hidden user	0.40 s	C++	2022-07-26 11:14:25
8	Adam Gyarmati	0.43 s	C++	2019-02-21 15:49:16
9	Harrison Shen	0.47 s	C++	2020-02-23 17:50:20
10	Hidden user	0.47 s	C++	2024-11-20 18:58:58

#	User	Runtime	Language	Date
1	Hidden user	4.39 s	Common Lisp	2019-08-02 20:41:15

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	6.67 s	F#	2022-11-10 19:05:20

#	User	Runtime	Language	Date
1	Iker Lissarrague	1.94 s	Go	2022-05-05 20:43:25
2	Norbert Voelker	2.12 s	Go	2021-07-27 23:57:44
3	Markus Mathiasen	3.53 s	Go	2022-08-22 13:31:33

#	User	Runtime	Language	Date
1	Hidden user	3.42 s	Haskell	2019-11-05 15:24:55

#	User	Runtime	Language	Date
1	Jon Chua	0.10 s	Java	2020-06-03 12:13:08
2	Ryan Chew	0.24 s	Java	2020-11-06 06:22:25
3	Isaac Tay Zhi Xian	0.25 s	Java	2022-07-25 18:22:59
4	Clement Oh	0.25 s	Java	2022-08-13 08:22:44
5	Leon Tham	0.27 s	Java	2019-09-27 03:48:16
6	Soo Qi Xuan Ian	0.31 s	Java	2020-11-07 17:06:23
7	Ang Peng Seng	0.33 s	Java	2019-10-13 08:58:16
8	Jacob Zhang	0.33 s	Java	2022-10-11 22:08:58
9	Hidden user	0.37 s	Java	2020-04-12 15:57:06
10	James Tang	0.41 s	Java	2020-11-06 00:49:48

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	3.18 s	JavaScript (SpiderMonkey)	2020-08-23 23:03:58
2	Jimmy Gustafsson	3.43 s	JavaScript (SpiderMonkey)	2024-07-21 10:49:15
3	Christian Cederquist	7.13 s	JavaScript (SpiderMonkey)	2023-04-03 10:48:57

#	User	Runtime	Language	Date
1	Chelsea Hoernemann	1.91 s	Kotlin	2022-12-12 00:12:39
2	Adam Rankin	2.00 s	Kotlin	2023-09-14 00:03:43
3	Hidden user	3.48 s	Kotlin	2019-12-20 12:49:28
4	Phường Lên	5.93 s	Kotlin	2020-01-17 22:58:18
5	Min-Zheng Shieh	7.50 s	Kotlin	2021-03-19 09:02:51

#	User	Runtime	Language	Date
1	Agis Daniels	0.66 s	Python 2	2024-01-30 16:24:19
2	Lars Åström	1.24 s	Python 2	2019-05-20 22:28:33
3	Jesper Öqvist	2.08 s	Python 2	2019-11-15 17:45:01
4	John Paul Hanson	3.58 s	Python 2	2018-09-26 06:56:31
5	Paul Devlin	4.92 s	Python 2	2019-02-21 20:44:04
6	udprogrammingteam Team	4.93 s	Python 2	2018-09-26 01:54:10
7	Andreas Björklund	5.01 s	Python 2	2021-04-08 20:58:50
8	Francesco Silvestri	7.18 s	Python 2	2019-05-12 20:37:13
9	Erik Tjøswold	7.83 s	Python 2	2017-11-12 18:59:09
10	Casper Rysgaard	7.87 s	Python 2	2020-02-10 12:13:47

#	User	Runtime	Language	Date
1	Petr	0.42 s	Python 3	2024-10-07 01:20:55
2	Yang Li	0.50 s	Python 3	2025-04-25 02:42:57
3	Nhự Nương Họ Vũ	0.59 s	Python 3	2025-03-25 04:49:05
4	Diana Kuntsmann	0.59 s	Python 3	2025-06-07 19:20:11
5	BOHAO ZHANG	0.60 s	Python 3	2020-11-15 08:22:13
6	d1strikt	0.60 s	Python 3	2025-05-28 18:12:42
7	Philip Luo	0.61 s	Python 3	2024-11-07 01:07:54
8	Laura Leiva	0.61 s	Python 3	2025-06-25 22:26:13
9	Tyco Nep	0.62 s	Python 3	2024-11-18 15:44:38
10	Doug Goodman	0.63 s	Python 3	2024-10-26 18:27:49

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.12 s	Rust	2025-06-01 15:36:32
2	Jonathan Choi	0.18 s	Rust	2024-04-08 05:21:28
3	Christofer Nolander	0.23 s	Rust	2019-10-21 00:54:54
4	Bas Dirks	0.28 s	Rust	2022-04-08 14:27:29
5	Joe Blower	0.31 s	Rust	2025-06-05 02:45:34
6	Hovig Manjikian	0.38 s	Rust	2021-09-14 01:13:44
7	Egor Kulikov	0.59 s	Rust	2024-11-19 11:33:10
8	Albert Rise Nielsen	0.68 s	Rust	2024-09-25 20:48:59
9	Emil Hultcrantz	0.76 s	Rust	2025-02-28 14:38:19
10	Freek van Keulen	0.77 s	Rust	2024-05-01 12:43:49

#	User	Runtime	Language	Date
1	Joe Blower	0.60 s	Zig	2025-06-05 06:37:22

#	User	Length	Language	Date
1	Ivan Petrov	1340	C	2017-11-30 09:44:28
2	Samuel Deutsch	1600	C	2020-11-03 09:25:56
3	Kevin Wu	1721	C	2020-03-29 12:27:34
4	Hidden user	1781	C	2024-12-15 22:48:50
5	pengin	1946	C	2021-08-31 13:52:33
6	Ian Soo	2211	C	2020-11-05 08:07:09
7	Hamza Rashid	2218	C	2024-11-12 17:29:17
8	Jeroen Jongkees	2406	C	2023-04-13 22:16:48
9	Max Nilsson	3884	C	2022-05-06 14:27:50

#	User	Length	Language	Date
1	Artemy Gavrilov	1943	C#	2024-04-08 06:30:11
2	Ben-Richard Ebbesvik	2811	C#	2023-12-22 23:32:34
3	Nils Lenart	6487	C#	2020-03-31 11:28:53
4	Mikael Fiala-Lundström	8368	C#	2021-11-11 00:57:34

#	User	Length	Language	Date
1	William Gan	519	C++	2018-04-14 10:55:37
2	Justin	537	C++	2024-10-03 16:25:52
3	Michael Goldwasser	552	C++	2023-11-22 18:58:23
4	Alei Reyes	606	C++	2017-10-28 19:04:37
5	Lim An Jun	609	C++	2023-02-11 17:04:36
6	Erik Amirell Eklöf	615	C++	2022-10-07 16:11:55
7	Andreas Alberg	622	C++	2024-04-24 12:11:33
8	Ahmed Chamseddine	643	C++	2024-07-26 19:35:36
9	Qianlang Chen	643	C++	2020-12-23 01:05:03
10	Cezar Guimarães	644	C++	2017-11-01 17:38:26

#	User	Length	Language	Date
1	Hidden user	2215	Common Lisp	2019-08-02 00:01:42

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	2001	F#	2022-11-10 19:05:20

#	User	Length	Language	Date
1	Markus Mathiasen	908	Go	2022-08-22 13:31:33
2	Iker Lissarrague	1657	Go	2022-05-05 20:43:25
3	Norbert Voelker	5516	Go	2021-07-27 23:57:44

#	User	Length	Language	Date
1	Hidden user	10322	Haskell	2019-11-05 15:24:55

#	User	Length	Language	Date
1	Liao Keng Hsu	561	Java	2024-11-08 09:52:35
2	Doug Goodman	1001	Java	2017-10-29 18:18:07
3	Sarah Al Taleb	1077	Java	2022-11-21 23:21:41
4	Tee Jin Seng	1100	Java	2025-04-11 11:48:02
5	Scormon Ho Rui Sheng	1116	Java	2025-04-11 10:40:46
6	Ong Wei Hong	1121	Java	2022-07-26 14:17:14
7	Ng Jun Yuan	1143	Java	2019-11-04 01:55:59
8	Sheikh Sufiyan	1166	Java	2019-11-04 13:41:56
9	Yixing Jiang	1208	Java	2021-04-09 05:36:45
10	Mitch Price	1225	Java	2017-11-06 20:12:36

#	User	Length	Language	Date
1	Jimmy Gustafsson	516	JavaScript (SpiderMonkey)	2024-07-21 10:49:15
2	Christian Cederquist	2382	JavaScript (SpiderMonkey)	2023-04-03 10:48:57
3	Bjørn Chr. Soltvedt	19251	JavaScript (SpiderMonkey)	2020-08-23 23:03:58

#	User	Length	Language	Date
1	Min-Zheng Shieh	1050	Kotlin	2021-03-19 09:02:51
2	Adam Rankin	1348	Kotlin	2023-09-14 00:03:43
3	Phường Lên	1489	Kotlin	2020-01-17 22:58:18
4	Hidden user	1649	Kotlin	2019-12-20 12:49:28
5	Chelsea Hoernemann	2155	Kotlin	2022-12-12 00:12:39

#	User	Length	Language	Date
1	Jesper Öqvist	481	Python 2	2019-11-15 17:45:01
2	Oskar Haarklou Veileborg	582	Python 2	2020-01-03 15:52:05
3	Andreas Björklund	699	Python 2	2021-04-08 20:58:50
4	Lars Åström	722	Python 2	2019-05-20 22:28:33
5	Casper Rysgaard	773	Python 2	2020-02-10 12:13:47
6	Agis Daniels	907	Python 2	2020-07-03 19:28:09
7	John Paul Hanson	1114	Python 2	2018-09-26 06:56:31
8	Francesco Silvestri	1205	Python 2	2019-05-12 20:37:13
9	Erik Tjøswold	1297	Python 2	2017-11-12 18:59:09
10	Paul Devlin	1347	Python 2	2019-02-21 20:44:04

#	User	Length	Language	Date
1	Thomas Feld	274	Python 3	2023-07-07 11:57:52
2	Tommi Järvenpää	287	Python 3	2024-04-15 13:54:19
3	Henrik Aili	354	Python 3	2024-03-08 13:28:58
4	Kévin Dubrulle	362	Python 3	2024-04-16 10:53:05
5	Petr	377	Python 3	2022-08-02 22:20:46
6	Timothy Baeckelant	382	Python 3	2024-04-24 11:09:06
7	Michael Goldwasser	413	Python 3	2023-11-22 20:01:52
8	Hidden user	425	Python 3	2023-07-29 03:20:00
9	Clement Oh	438	Python 3	2024-02-09 07:03:57
10	Zak Smith	449	Python 3	2021-06-24 14:39:31

#	User	Length	Language	Date
1	Birk Tjelmeland	1002	Rust	2019-02-19 12:17:26
2	Bas Dirks	1061	Rust	2022-05-17 10:56:41
3	Eskil Queseth	1498	Rust	2020-10-07 19:06:10
4	Isak Jägberg	2200	Rust	2024-10-28 15:20:35
5	Freek van Keulen	2271	Rust	2024-05-01 12:43:49
6	Joe Blower	2371	Rust	2025-06-05 02:45:34
7	Sindbad Walter	2423	Rust	2023-11-07 01:56:39
8	Albert Rise Nielsen	2470	Rust	2024-09-25 20:46:37
9	Jonathan Choi	2929	Rust	2024-04-08 05:21:28
10	Christofer Nolander	4594	Rust	2019-10-21 01:08:15

#	User	Length	Language	Date
1	Joe Blower	3447	Zig	2025-06-04 18:22:50

Solution running time distribution