Problem A
Ab Initio — Problem Statistics

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Submissions	5616
Accepted submissions	878
Submission ratio	15.63%
Authors	779
Full solves [?]	461
Full solve Ratio	59.18%

#	User	Runtime	Language	Date
1	Hidden user	0.08 s	C	2021-10-22 16:50:42
2	Bergur Snorrason	0.14 s	C	2019-08-18 20:34:21
3	陳重諺	0.15 s	C	2021-02-05 18:40:35
4	Kenneth Langedal	0.22 s	C	2024-03-01 16:06:11
5	Ivan Petrov	0.25 s	C	2019-11-06 08:52:54
6	klimisnotmilk	0.26 s	C	2023-07-21 06:47:43
7	pengin	0.27 s	C	2021-07-30 19:14:30
8	Jón Steinn Elíasson	0.31 s	C	2020-04-25 13:32:37
9	Jonathan Allarassem	0.31 s	C	2024-10-08 11:09:50
10	Connor Gladish	0.31 s	C	2024-12-07 03:42:23

#	User	Runtime	Language	Date
1	James Khalil	0.65 s	C#	2024-02-08 10:24:13
2	Artemy Gavrilov	0.79 s	C#	2024-02-18 10:55:32

#	User	Runtime	Language	Date
1	Zhang Jikun	0.07 s	C++	2022-07-21 23:37:59
2	Hidden user	0.09 s	C++	2019-11-24 17:36:09
3	Frank Endriss	0.09 s	C++	2022-03-17 16:25:48
4	Lawry Sorenson	0.09 s	C++	2025-08-13 18:57:21
5	Long Qian	0.10 s	C++	2019-05-22 06:18:41
6	Hokiewan Thezeus	0.10 s	C++	2019-10-26 18:54:37
7	Hidden user	0.10 s	C++	2022-11-11 16:43:10
8	Ganapathy Sanath Balaji	0.11 s	C++	2019-11-26 11:57:24
9	Wen Junhua	0.11 s	C++	2019-12-02 04:13:48
10	Amaan Marfatia	0.11 s	C++	2020-03-26 02:35:23

#	User	Runtime	Language	Date
1	Clement Oh	0.24 s	Java	2022-08-13 22:48:09
2	Liao Keng Hsu	0.34 s	Java	2024-11-16 17:09:00
3	Crystal Sharpe	0.41 s	Java	2020-07-14 06:04:32
4	Jeremy Lim	0.45 s	Java	2025-02-27 06:46:26
5	Nguwi Qi Yue	0.45 s	Java	2025-10-22 17:57:26
6	Vu Minh Hieu	0.47 s	Java	2024-03-09 22:12:03
7	Nicholas Russell Saerang	0.48 s	Java	2022-03-24 22:39:06
8	Mayuri Birari	0.48 s	Java	2024-04-06 01:28:06
9	SANTIAGO ROMERO NAVARRO	0.48 s	Java	2024-06-08 17:33:28
10	See Man Teng	0.48 s	Java	2024-11-16 09:46:50

#	User	Runtime	Language	Date
1	Hidden user	0.23 s	OCaml	2024-02-05 23:40:37
2	Hidden user	0.71 s	OCaml	2024-02-06 09:52:46

#	User	Runtime	Language	Date
1	Hidden user	0.50 s	Python 2	2019-04-24 08:38:04

#	User	Runtime	Language	Date
1	Avery	0.34 s	Python 3	2025-08-14 06:52:18
2	nigga scrotum balls	0.36 s	Python 3	2024-10-03 07:50:05
3	Nicholas Russell Saerang	0.36 s	Python 3	2025-03-10 04:29:01
4	Saif Shahriar	0.36 s	Python 3	2025-12-05 09:11:24
5	Hidden user	0.37 s	Python 3	2024-11-26 06:32:29
6	Guillermo Garcia Ramos de la Rosa	0.37 s	Python 3	2024-12-04 23:34:54
7	Muhammad Fajar Agus Saputra	0.37 s	Python 3	2025-02-06 19:53:46
8	ss ss	0.37 s	Python 3	2025-03-01 10:57:14
9	Jaime Sonsino Jalife	0.37 s	Python 3	2025-09-26 20:05:14
10	Raj Nikil Srinath	0.37 s	Python 3	2025-10-11 16:28:14

#	User	Runtime	Language	Date
1	Gabriele Baietta	0.09 s	Rust	2023-09-11 15:58:15
2	Daniel Anker Hermansen	0.14 s	Rust	2023-09-28 10:26:04
3	Hubertus Adhy Pratama Setiawan	0.14 s	Rust	2024-01-20 20:37:18
4	Elias Nodland	0.23 s	Rust	2023-02-25 21:03:05
5	David Llorens	0.73 s	Rust	2023-08-13 10:39:09

#	User	Length	Language	Date
1	pengin	1574	C	2021-07-30 19:14:30
2	klimisnotmilk	1586	C	2023-07-21 06:47:43
3	陳重諺	2057	C	2021-02-05 18:40:35
4	Hidden user	2473	C	2019-08-30 06:09:26
5	Kenneth Langedal	2634	C	2024-03-01 16:06:11
6	Hidden user	2706	C	2021-10-22 16:50:42
7	Bergur Snorrason	2918	C	2019-08-18 20:24:39
8	Ivan Petrov	3194	C	2019-11-06 08:52:54
9	Jón Steinn Elíasson	4635	C	2020-04-25 13:46:31
10	Tran Gia Cuong (FUG CT)	4823	C	2021-10-21 04:56:00

#	User	Length	Language	Date
1	James Khalil	4192	C#	2024-02-08 10:24:13
2	Artemy Gavrilov	5987	C#	2024-02-18 10:55:32

#	User	Length	Language	Date
1	Bianca Vicente	462	C++	2024-02-02 19:48:43
2	David Moews	556	C++	2023-05-22 08:10:51
3	Tan Keng Yong	685	C++	2022-11-15 23:47:50
4	Matias Nova Baza	1075	C++	2024-01-05 03:35:49
5	Nathaniel Ang	1124	C++	2019-11-28 08:24:18
6	Yeung Man Tsung	1188	C++	2022-07-27 06:00:53
7	Brandon Foong	1250	C++	2020-10-14 20:29:06
8	Rafael Kristoforus Yanto	1301	C++	2025-04-17 06:33:27
9	sicupu	1302	C++	2021-04-01 12:03:30
10	Hyunjun Lee	1309	C++	2022-11-12 08:32:24

#	User	Length	Language	Date
1	Liao Keng Hsu	1137	Java	2024-11-16 16:37:09
2	Frederick Pek	2125	Java	2021-03-27 10:01:19
3	WONG YAO FENG, GARETH	2429	Java	2025-11-19 18:24:50
4	Isaac Lee	2594	Java	2020-07-15 07:12:46
5	Chen Yihao	2806	Java	2023-10-27 03:33:28
6	Crystal Sharpe	2819	Java	2020-05-08 06:16:44
7	Clement Oh	2935	Java	2022-08-13 22:03:50
8	Jeremy Lim	3070	Java	2023-12-17 16:22:16
9	See Man Teng	3137	Java	2024-11-16 09:46:50
10	Jonathan Ho Kai Jian	3232	Java	2025-10-20 11:45:37

#	User	Length	Language	Date
1	Hidden user	2525	OCaml	2024-02-06 19:35:32
2	Hidden user	2879	OCaml	2024-02-05 23:40:37

#	User	Length	Language	Date
1	Hidden user	1010	Python 2	2019-04-24 08:38:04

#	User	Length	Language	Date
1	Avery	435	Python 3	2025-08-14 08:01:21
2	Bjørn Dons	660	Python 3	2023-10-24 21:21:18
3	Dante Bencivenga	746	Python 3	2022-09-30 22:43:36
4	Nicholas Russell Saerang	850	Python 3	2023-10-24 08:19:19
5	Hidden user	858	Python 3	2024-02-02 23:53:15
6	Guillermo Garcia Ramos de la Rosa	858	Python 3	2024-12-04 23:34:54
7	ss ss	858	Python 3	2025-03-01 10:57:14
8	Andrés Iglesias Fernández	858	Python 3	2025-12-05 21:18:45
9	oscar llain	881	Python 3	2024-03-16 03:17:31
10	Pangkywara Segoro Djodi	881	Python 3	2024-03-20 18:11:49

#	User	Length	Language	Date
1	David Llorens	2648	Rust	2023-08-13 10:39:09
2	Elias Nodland	2983	Rust	2023-02-25 21:10:53
3	Hubertus Adhy Pratama Setiawan	4004	Rust	2024-01-20 17:22:58
4	Gabriele Baietta	7346	Rust	2023-09-11 15:58:15
5	Daniel Anker Hermansen	22529	Rust	2023-09-28 10:26:04

Solution running time distribution