Problem A
Dreamer — Problem Statistics

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Submissions	2927
Accepted submissions	1257
Submission ratio	42.94%
Authors	1055
Accepted authors	958
Author ratio	90.81%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.00 s	C	2018-11-17 17:03:46
2	Ivan Petrov	0.01 s	C	2019-03-05 13:47:00
3	Johan Larsson	0.01 s	C	2022-08-22 15:23:39
4	Max McGinty	0.01 s	C	2025-02-26 23:59:09
5	Gabriel MIHALCEA	0.03 s	C	2020-11-28 12:03:29
6	Aljaz Brodar	0.47 s	C	2024-08-22 09:23:00
7	Naveen Kumar S	0.91 s	C	2025-04-26 15:18:14

#	User	Runtime	Language	Date
1	Göran Andersson	0.08 s	C#	2022-05-22 17:15:57
2	Pontus Lidholm	0.54 s	C#	2023-08-10 18:09:41
3	Simon Nilsson	2.37 s	C#	2019-02-04 22:42:42

#	User	Runtime	Language	Date
1	Hidden user	0.30 s	Common Lisp	2019-07-24 08:32:44

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.29 s	F#	2022-12-17 15:39:47

#	User	Runtime	Language	Date
1	Norbert Voelker	0.72 s	Go	2021-05-25 20:24:01
2	Ola Dahl	0.84 s	Go	2022-10-25 22:23:43

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.30 s	Haskell	2024-03-09 20:30:55
2	Håkon Flatval	0.36 s	Haskell	2018-12-01 04:29:41
3	Hidden user	0.80 s	Haskell	2023-01-12 23:23:29
4	Hidden user	0.95 s	Haskell	2019-08-29 12:20:00
5	Intrets	0.99 s	Haskell	2019-09-06 19:45:44

#	User	Runtime	Language	Date
1	José Vander Meulen	0.07 s	Java	2018-11-09 22:03:38
2	Sven Rönnbäck	0.07 s	Java	2023-01-28 16:17:11
3	Shahm Abdulrazzak	0.18 s	Java	2023-08-16 02:23:36
4	Vivan Gupta	0.25 s	Java	2024-01-25 05:55:48
5	Tiến Nguyễn	0.26 s	Java	2020-09-17 06:33:09
6	Bao Quoc Phan	0.29 s	Java	2024-01-26 01:32:33
7	Ngphoang Phuc	0.30 s	Java	2020-09-19 07:13:39
8	Martijn Muijsers	0.33 s	Java	2020-08-30 16:41:39
9	Bowen Yang	0.35 s	Java	2022-09-07 19:38:35
10	Chirag Asrani	0.38 s	Java	2025-03-17 02:30:55

#	User	Runtime	Language	Date
1	Peter Kedemo	2.80 s	JavaScript (Node.js)	2020-01-02 12:00:44

#	User	Runtime	Language	Date
1	Jimmy Gustafsson	0.29 s	JavaScript (SpiderMonkey)	2022-08-08 22:37:20
2	Bjørn Chr. Soltvedt	1.34 s	JavaScript (SpiderMonkey)	2018-12-02 15:10:31
3	Christian Cederquist	1.69 s	JavaScript (SpiderMonkey)	2023-02-20 12:44:57

#	User	Runtime	Language	Date
1	Timothy Gaede	1.04 s	Julia	2024-05-11 11:40:34
2	Noszály Csaba	1.43 s	Julia	2025-03-02 16:50:28

#	User	Runtime	Language	Date
1	Johnny Baloney	0.71 s	Kotlin	2022-02-16 20:04:03
2	Nicholas Johnson	0.98 s	Kotlin	2021-03-08 19:17:49
3	Adam Koprowski	2.06 s	Kotlin	2020-11-22 19:14:32
4	Neil Harmon	3.62 s	Kotlin	2019-05-09 12:06:54
5	Emil Göransson	3.96 s	Kotlin	2023-08-14 14:37:34

#	User	Runtime	Language	Date
1	Daniel Brännvall	3.24 s	Prolog	2023-08-11 01:02:32

#	User	Runtime	Language	Date
1	Måns Magnusson	0.10 s	Python 2	2020-03-28 19:55:57
2	Maj Stenmark	0.16 s	Python 2	2020-03-28 19:55:30
3	Yanmarshus Bachtiar	0.20 s	Python 2	2020-11-01 10:03:50
4	Andreas Björklund	0.22 s	Python 2	2019-10-23 06:33:17
5	Johan Lyts	0.26 s	Python 2	2020-03-30 13:44:39
6	Lars Åström	0.27 s	Python 2	2018-11-20 10:39:42
7	Alex Van Keulen	0.61 s	Python 2	2018-11-25 04:46:29
8	Thomas Feld	0.65 s	Python 2	2019-09-09 16:33:01
9	Paul Graydon	0.75 s	Python 2	2019-04-17 20:03:47
10	dasuo	0.83 s	Python 2	2018-11-04 03:22:08

#	User	Runtime	Language	Date
1	Ivan Chernyshov	0.10 s	Python 3	2019-01-13 12:13:53
2	Måns Magnusson	0.12 s	Python 3	2020-03-28 19:55:00
3	Yang Li	0.13 s	Python 3	2019-02-05 22:30:01
4	Nguyễn Bá Khánh Tùng	0.14 s	Python 3	2022-09-22 07:33:55
5	Andriy Makukha	0.25 s	Python 3	2020-03-17 15:32:35
6	Isaac Lee	0.25 s	Python 3	2020-05-10 01:44:58
7	krza0004	0.26 s	Python 3	2023-08-14 16:09:34
8	Alexei Fedotov	0.27 s	Python 3	2019-01-14 14:42:49
9	Elin Gammelli	0.27 s	Python 3	2023-08-16 22:51:20
10	Evan Losier	0.32 s	Python 3	2022-09-25 09:45:48

#	User	Runtime	Language	Date
1	Chris Seager	0.01 s	Rust	2025-03-26 14:27:44
2	Melker Forsberg	0.02 s	Rust	2023-08-07 22:40:55
3	Paul Graydon	0.05 s	Rust	2019-02-16 17:38:46
4	Ola Dahl	0.08 s	Rust	2022-10-27 06:59:52
5	Bas Dirks	0.34 s	Rust	2022-02-17 18:14:06
6	Nicholas	0.43 s	Rust	2023-08-15 12:30:07
7	Pahlevi Fikri Auliya	3.21 s	Rust	2021-02-27 07:05:07

#	User	Length	Language	Date
1	Naveen Kumar S	1744	C	2025-04-26 15:18:14
2	Gabriel MIHALCEA	2251	C	2020-11-28 12:03:29
3	Max McGinty	2589	C	2025-02-26 23:59:09
4	Ivan Petrov	2608	C	2019-03-05 13:47:00
5	Johan Larsson	3095	C	2022-08-22 15:23:39
6	Aljaz Brodar	3868	C	2024-08-22 09:23:00
7	Bergur Snorrason	9564	C	2018-11-17 17:03:46

#	User	Length	Language	Date
1	Göran Andersson	2892	C#	2022-05-22 17:15:57
2	Simon Nilsson	3759	C#	2019-02-04 22:42:42
3	Pontus Lidholm	4829	C#	2023-08-10 18:09:41

#	User	Length	Language	Date
1	Johan Wind	821	C++	2018-11-16 17:26:57
2	Hidden user	950	C++	2018-11-20 01:02:38
3	Hyunjun Lee	964	C++	2022-11-24 06:05:26
4	鹿目圆	984	C++	2019-07-04 17:17:45
5	Yeung Man Tsung	985	C++	2022-11-20 11:21:58
6	Grae Yeandle	1006	C++	2019-08-25 16:22:58
7	Armen Andreasyan	1040	C++	2018-11-18 13:05:15
8	Paul Wild	1047	C++	2022-04-30 21:19:37
9	吳柏橙	1081	C++	2020-11-18 12:25:10
10	Christian Yongwhan Lim	1153	C++	2023-06-25 04:22:49

#	User	Length	Language	Date
1	Hidden user	2074	Common Lisp	2019-07-24 07:16:29

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	1827	F#	2022-12-17 15:39:47

#	User	Length	Language	Date
1	Norbert Voelker	1831	Go	2021-05-25 20:24:01
2	Ola Dahl	3473	Go	2022-10-25 22:23:43

#	User	Length	Language	Date
1	Håkon Flatval	1330	Haskell	2018-12-01 04:29:41
2	Hidden user	1483	Haskell	2023-01-12 23:23:29
3	Steinar Simonnes	1744	Haskell	2024-03-09 20:33:57
4	Intrets	3916	Haskell	2019-09-06 19:45:44
5	Hidden user	4051	Haskell	2019-08-29 12:20:00

#	User	Length	Language	Date
1	Doug Goodman	1621	Java	2018-12-04 14:30:27
2	Marc Dominic San Pedro	2091	Java	2024-04-15 07:39:47
3	Tommy Maglietto	2164	Java	2025-02-27 01:48:45
4	Andrew Polizzotto	2229	Java	2020-06-08 09:45:26
5	Paul Boddington	2411	Java	2020-07-21 23:41:25
6	Eric Pinter	2418	Java	2019-05-26 08:55:45
7	Christopher Lee	2615	Java	2025-03-15 19:54:13
8	Godmar Back	2643	Java	2022-09-03 06:25:49
9	Elaica Dela Cruz	2674	Java	2024-10-10 12:05:58
10	Saksham Goel	2993	Java	2021-06-25 06:22:15

#	User	Length	Language	Date
1	Peter Kedemo	2082	JavaScript (Node.js)	2020-01-02 12:00:44

#	User	Length	Language	Date
1	Jimmy Gustafsson	959	JavaScript (SpiderMonkey)	2022-08-08 22:37:20
2	Christian Cederquist	1421	JavaScript (SpiderMonkey)	2023-02-20 12:44:57
3	Bjørn Chr. Soltvedt	2001	JavaScript (SpiderMonkey)	2018-12-02 15:10:31

#	User	Length	Language	Date
1	Noszály Csaba	1386	Julia	2025-03-02 16:50:28
2	Timothy Gaede	4377	Julia	2024-05-11 11:35:29

#	User	Length	Language	Date
1	Emil Göransson	1385	Kotlin	2023-08-14 14:41:10
2	Adam Koprowski	2311	Kotlin	2020-11-22 19:14:32
3	Johnny Baloney	2547	Kotlin	2022-02-16 19:18:20
4	Neil Harmon	2776	Kotlin	2019-05-09 12:06:54
5	Nicholas Johnson	3692	Kotlin	2021-03-08 19:26:06

#	User	Length	Language	Date
1	Daniel Brännvall	1752	Prolog	2023-08-11 01:02:32

#	User	Length	Language	Date
1	Thomas Feld	539	Python 2	2019-09-09 16:33:01
2	Wang Zhi Jian	663	Python 2	2019-05-07 14:11:42
3	Paul Graydon	774	Python 2	2019-02-11 04:47:30
4	Ainun Najib	833	Python 2	2020-10-22 17:21:29
5	Catalin Popa	846	Python 2	2018-11-22 20:40:16
6	Max Holmberg	887	Python 2	2018-11-10 14:50:25
7	Lars Åström	908	Python 2	2018-11-20 10:39:42
8	Måns Magnusson	933	Python 2	2020-03-28 19:34:07
9	Johan Lyts	1065	Python 2	2020-03-30 13:44:39
10	Maj Stenmark	1215	Python 2	2020-03-28 19:23:09

#	User	Length	Language	Date
1	Benjamin Z White	375	Python 3	2023-04-08 20:23:55
2	Vedran Čačić	463	Python 3	2019-02-04 06:59:45
3	Ahmed Chamseddine	533	Python 3	2024-09-24 10:20:38
4	Brandon Foong	550	Python 3	2023-02-10 05:01:19
5	Johan Sannemo	554	Python 3	2020-09-06 15:12:02
6	Lim Hong Hui Eugene	568	Python 3	2020-04-23 12:05:28
7	Bryan Wong Wei Heng	617	Python 3	2020-02-19 17:31:44
8	Nicholas Russell Saerang	622	Python 3	2023-06-26 05:00:00
9	Jerome Leow	628	Python 3	2021-01-08 14:06:50
10	Oskar Haarklou Veileborg	645	Python 3	2020-04-27 08:21:17

#	User	Length	Language	Date
1	Nicholas	2486	Rust	2023-08-15 12:30:07
2	Chris Seager	3096	Rust	2025-03-26 14:27:44
3	Bas Dirks	3154	Rust	2022-02-17 18:16:02
4	Paul Graydon	3202	Rust	2019-02-14 07:01:09
5	Pahlevi Fikri Auliya	3624	Rust	2021-02-27 07:05:07
6	Ola Dahl	4417	Rust	2022-10-26 22:12:50
7	Melker Forsberg	4476	Rust	2023-08-07 22:40:55

Solution running time distribution