Problem I
Reconnaissance — Problem Statistics

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Submissions	2514
Accepted submissions	892
Submission ratio	35.48%
Authors	544
Full solves [?]	479
Full solve Ratio	88.05%

#	User	Runtime	Language	Date
1	Eyleifur Bjarkason	0.02 s	C	2020-10-28 22:34:59
2	Thomas Harmeyer	0.03 s	C	2022-11-13 21:01:23
3	Ivan Petrov	0.04 s	C	2019-07-17 08:38:32
4	Bergur Snorrason	0.11 s	C	2020-03-16 10:21:23

#	User	Runtime	Language	Date
1	Henry Xia	0.01 s	C++	2022-05-05 09:09:38
2	Henrik Kvamme	0.02 s	C++	2023-02-21 17:10:47
3	Muhammad Irham Rasyidi	0.03 s	C++	2017-06-15 02:35:53
4	Luke Videckis	0.03 s	C++	2019-01-28 18:19:41
5	Felix Halim	0.03 s	C++	2019-12-26 02:43:26
6	Steven Halim	0.03 s	C++	2019-12-29 09:01:11
7	Liu Husong	0.03 s	C++	2020-01-04 06:19:22
8	Li Hong Sheng Gabriel	0.03 s	C++	2020-01-10 04:28:28
9	Tan Wang Leng	0.03 s	C++	2020-01-21 06:39:03
10	Richard Li	0.03 s	C++	2020-03-07 03:49:27

#	User	Runtime	Language	Date
1	Norbert Voelker	0.52 s	Go	2021-11-27 22:49:08

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.35 s	Haskell	2024-02-04 13:37:50
2	Antony Lee	0.58 s	Haskell	2020-05-12 19:55:45

#	User	Runtime	Language	Date
1	William Fiset	0.11 s	Java	2017-02-08 23:19:56
2	Bjørn Dons	0.14 s	Java	2023-01-01 19:43:19
3	Crystal Sharpe	0.16 s	Java	2021-03-21 05:21:27
4	Charlie Zheng	0.18 s	Java	2019-02-14 03:57:13
5	Nick Wu	0.31 s	Java	2016-06-16 01:06:45
6	Kadin Tang	0.33 s	Java	2020-10-29 02:41:29
7	Micah Stairs	0.34 s	Java	2017-02-08 15:05:56
8	Akshay Gupta	0.34 s	Java	2017-11-06 22:03:17
9	Sam Henry	0.34 s	Java	2018-02-27 15:58:56
10	Viraj Maddur	0.36 s	Java	2017-02-06 18:31:48

#	User	Runtime	Language	Date
1	Jacob Huebner	0.29 s	Kotlin	2020-07-30 19:10:16
2	Hidden user	0.46 s	Kotlin	2020-04-25 20:04:09

#	User	Runtime	Language	Date
1	Jakob Rødal Skaar	0.49 s	OCaml	2024-02-05 11:12:45

#	User	Runtime	Language	Date
1	Edward Song	0.17 s	Python 2	2019-02-14 04:24:01

#	User	Runtime	Language	Date
1	Simen Sørensen	0.09 s	Python 3	2024-11-13 14:57:53
2	Hidden user	0.12 s	Python 3	2026-03-18 00:57:13
3	Kyle Layzer	0.14 s	Python 3	2024-01-16 22:08:01
4	Hidden user	0.14 s	Python 3	2024-06-22 13:43:02
5	Kristian Nore	0.15 s	Python 3	2024-01-31 20:36:24
6	Pablo Sainz López	0.15 s	Python 3	2025-06-03 16:54:46
7	Jonathan Romero	0.15 s	Python 3	2025-10-23 14:47:04
8	Hidden user	0.15 s	Python 3	2025-11-03 15:13:29
9	Erik Buis	0.16 s	Python 3	2022-03-23 19:54:55
10	Jakob Rødal Skaar	0.16 s	Python 3	2024-01-31 19:59:27

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.01 s	Rust	2025-07-05 02:42:58
2	Sebastian Refsnes	0.03 s	Rust	2024-02-03 12:17:12
3	Ole Vik Lysne	0.03 s	Rust	2024-02-05 16:58:20
4	Lars Haukland	0.04 s	Rust	2024-02-05 10:32:09
5	gard heine kalland	0.08 s	Rust	2024-02-15 13:46:26

#	User	Length	Language	Date
1	Thomas Harmeyer	738	C	2022-11-13 21:01:23
2	Bergur Snorrason	2445	C	2020-03-16 10:21:23
3	Ivan Petrov	2811	C	2019-07-17 08:38:32
4	Eyleifur Bjarkason	7761	C	2020-10-28 22:40:11

#	User	Length	Language	Date
1	Markus Mathiasen	626	C++	2022-08-04 19:04:16
2	מגיב גן	647	C++	2025-05-05 00:30:52
3	Hidden user	663	C++	2019-10-24 19:28:07
4	Liu Husong	679	C++	2020-01-04 06:19:22
5	Ernest Ng Zi Xuan	679	C++	2023-08-22 19:58:40
6	Hidden user	681	C++	2025-07-15 22:55:54
7	Felix Halim	685	C++	2019-12-26 02:43:26
8	Roger Chen	689	C++	2019-10-03 03:11:05
9	Hyunjun Lee	691	C++	2022-12-11 02:01:17
10	Hidden user	745	C++	2020-01-09 21:46:12

#	User	Length	Language	Date
1	Norbert Voelker	1843	Go	2021-11-27 22:49:08

#	User	Length	Language	Date
1	Steinar Simonnes	1238	Haskell	2024-02-04 13:25:26
2	Antony Lee	1503	Haskell	2020-05-12 19:55:45

#	User	Length	Language	Date
1	Brennan Cleland	1048	Java	2022-11-14 01:21:18
2	Brett Fazio	1058	Java	2019-03-06 18:57:46
3	Jacob Minder	1197	Java	2024-04-11 02:49:47
4	Eric Williamson	1224	Java	2018-02-25 19:51:57
5	Haseeb	1229	Java	2023-10-24 06:31:40
6	Dylan Lyon	1281	Java	2019-03-05 00:12:41
7	Farhad Amiri	1324	Java	2023-10-24 10:33:35
8	Jasper Yeo	1340	Java	2023-10-25 01:55:45
9	Kadin Tang	1341	Java	2023-10-25 01:54:11
10	Dylan Nguyen	1345	Java	2023-10-22 22:22:05

#	User	Length	Language	Date
1	Hidden user	1756	Kotlin	2020-04-25 20:04:09
2	Jacob Huebner	2047	Kotlin	2020-07-30 19:10:16

#	User	Length	Language	Date
1	Jakob Rødal Skaar	852	OCaml	2024-02-05 11:12:45

#	User	Length	Language	Date
1	Edward Song	774	Python 2	2019-02-14 04:24:01

#	User	Length	Language	Date
1	Michael Goldwasser	230	Python 3	2025-09-14 06:40:50
2	Simen Sørensen	314	Python 3	2024-11-13 15:50:46
3	Nicholas Russell Saerang	346	Python 3	2023-09-15 05:09:33
4	Martin Tran	386	Python 3	2019-02-14 20:21:17
5	Steven Hwang	409	Python 3	2019-10-05 04:20:09
6	Brandon Yuan	438	Python 3	2026-03-15 04:06:52
7	Paul Chen	444	Python 3	2019-10-03 03:22:32
8	David Sung	444	Python 3	2026-03-12 02:42:38
9	Lorenzo Grevink	495	Python 3	2022-03-23 18:29:05
10	Hidden user	527	Python 3	2026-03-14 01:20:01

#	User	Length	Language	Date
1	Ole Vik Lysne	1310	Rust	2024-02-05 23:21:17
2	Lars Haukland	1831	Rust	2024-02-05 10:32:09
3	Sebastian Refsnes	1920	Rust	2024-02-03 12:17:12
4	gard heine kalland	1924	Rust	2024-03-26 13:42:43
5	Vincent Lagerros	67324	Rust	2025-07-05 02:41:05

Solution running time distribution