Problem A
Dreamer — Problem Statistics

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Submissions	3188
Accepted submissions	1344
Submission ratio	42.16%
Authors	1125
Full solves [?]	1024
Full solve Ratio	91.02%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.00 s	C	2018-11-17 16:03:46
2	Ivan Petrov	0.01 s	C	2019-03-05 12:47:00
3	Johan Larsson	0.01 s	C	2022-08-22 13:23:39
4	Max McGinty	0.01 s	C	2025-02-26 22:59:09
5	Gabriel MIHALCEA	0.03 s	C	2020-11-28 11:03:29
6	Hidden user	0.47 s	C	2024-08-22 07:23:00
7	Naveen Kumar S	0.91 s	C	2025-04-26 13:18:14

#	User	Runtime	Language	Date
1	Göran Andersson	0.08 s	C#	2022-05-22 15:15:57
2	Pontus Lidholm	0.54 s	C#	2023-08-10 16:09:41
3	Simon Nilsson	2.37 s	C#	2019-02-04 21:42:42

#	User	Runtime	Language	Date
1	Hidden user	0.30 s	Common Lisp	2019-07-24 06:32:44

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.29 s	F#	2022-12-17 14:39:47

#	User	Runtime	Language	Date
1	Norbert Voelker	0.72 s	Go	2021-05-25 18:24:01
2	Ola Dahl	0.84 s	Go	2022-10-25 20:23:43

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.30 s	Haskell	2024-03-09 19:30:55
2	Håkon Flatval	0.36 s	Haskell	2018-12-01 03:29:41
3	Hidden user	0.80 s	Haskell	2023-01-12 22:23:29
4	Hidden user	0.95 s	Haskell	2019-08-29 10:20:00
5	Intrets	0.99 s	Haskell	2019-09-06 17:45:44

#	User	Runtime	Language	Date
1	José Vander Meulen	0.07 s	Java	2018-11-09 21:03:38
2	Sven Rönnbäck	0.07 s	Java	2023-01-28 15:17:11
3	Shahm Abdulrazzak	0.18 s	Java	2023-08-16 00:23:36
4	Vivan Gupta	0.25 s	Java	2024-01-25 04:55:48
5	Tiến Nguyễn	0.26 s	Java	2020-09-17 04:33:09
6	Bao Quoc Phan	0.29 s	Java	2024-01-26 00:32:33
7	Ngphoang Phuc	0.30 s	Java	2020-09-19 05:13:39
8	Martijn Muijsers	0.33 s	Java	2020-08-30 14:41:39
9	Hunter Brickers	0.34 s	Java	2025-09-30 17:50:37
10	Ranjith M	0.34 s	Java	2025-10-28 23:13:16

#	User	Runtime	Language	Date
1	Peter Kedemo	2.80 s	JavaScript (Node.js)	2020-01-02 11:00:44

#	User	Runtime	Language	Date
1	Jimmy Gustafsson	0.29 s	JavaScript (SpiderMonkey)	2022-08-08 20:37:20
2	Bjørn Chr. Soltvedt	1.34 s	JavaScript (SpiderMonkey)	2018-12-02 14:10:31
3	Christian Pilegaard Cederquist	1.69 s	JavaScript (SpiderMonkey)	2023-02-20 11:44:57

#	User	Runtime	Language	Date
1	Timothy Gaede	1.04 s	Julia	2024-05-11 09:40:34
2	Hidden user	1.43 s	Julia	2025-03-02 15:50:28

#	User	Runtime	Language	Date
1	Johnny Baloney	0.71 s	Kotlin	2022-02-16 19:04:03
2	Nicholas Johnson	0.98 s	Kotlin	2021-03-08 18:17:49
3	Adam Koprowski	2.06 s	Kotlin	2020-11-22 18:14:32
4	Neil Harmon	3.62 s	Kotlin	2019-05-09 10:06:54
5	Emil Göransson	3.96 s	Kotlin	2023-08-14 12:37:34

#	User	Runtime	Language	Date
1	Daniel Brännvall	3.24 s	Prolog	2023-08-10 23:02:32

#	User	Runtime	Language	Date
1	Måns Magnusson	0.10 s	Python 2	2020-03-28 18:55:57
2	Maj Stenmark	0.16 s	Python 2	2020-03-28 18:55:30
3	Yanmarshus Bachtiar	0.20 s	Python 2	2020-11-01 09:03:50
4	Andreas Björklund	0.22 s	Python 2	2019-10-23 04:33:17
5	Johan Lyts	0.26 s	Python 2	2020-03-30 11:44:39
6	Lars Åström	0.27 s	Python 2	2018-11-20 09:39:42
7	Alex Van Keulen	0.61 s	Python 2	2018-11-25 03:46:29
8	Thomas Feld	0.65 s	Python 2	2019-09-09 14:33:01
9	Paul Graydon	0.75 s	Python 2	2019-04-17 18:03:47
10	dasuo	0.83 s	Python 2	2018-11-04 02:22:08

#	User	Runtime	Language	Date
1	Ivan Chernyshov	0.10 s	Python 3	2019-01-13 11:13:53
2	Måns Magnusson	0.12 s	Python 3	2020-03-28 18:55:00
3	Yang Li	0.13 s	Python 3	2019-02-05 21:30:01
4	Nguyễn Bá Khánh Tùng	0.14 s	Python 3	2022-09-22 05:33:55
5	Andriy Makukha	0.25 s	Python 3	2020-03-17 14:32:35
6	Isaac Lee	0.25 s	Python 3	2020-05-09 23:44:58
7	krza0004	0.26 s	Python 3	2023-08-14 14:09:34
8	Alexei Fedotov	0.27 s	Python 3	2019-01-14 13:42:49
9	Elin Gammelli	0.27 s	Python 3	2023-08-16 20:51:20
10	Evan Losier	0.32 s	Python 3	2022-09-25 07:45:48

#	User	Runtime	Language	Date
1	Chris Seager	0.01 s	Rust	2025-03-26 13:27:44
2	Melker Forsberg	0.02 s	Rust	2023-08-07 20:40:55
3	Paul Graydon	0.05 s	Rust	2019-02-16 16:38:46
4	Ola Dahl	0.08 s	Rust	2022-10-27 04:59:52
5	Bas Dirks	0.34 s	Rust	2022-02-17 17:14:06
6	Nicholas	0.43 s	Rust	2023-08-15 10:30:07
7	Pahlevi Fikri Auliya	3.21 s	Rust	2021-02-27 06:05:07

#	User	Length	Language	Date
1	Naveen Kumar S	1744	C	2025-04-26 13:18:14
2	Gabriel MIHALCEA	2251	C	2020-11-28 11:03:29
3	Max McGinty	2589	C	2025-02-26 22:59:09
4	Ivan Petrov	2608	C	2019-03-05 12:47:00
5	Johan Larsson	3095	C	2022-08-22 13:23:39
6	Hidden user	3868	C	2024-08-22 07:23:00
7	Bergur Snorrason	9573	C	2018-11-17 16:03:46

#	User	Length	Language	Date
1	Göran Andersson	2892	C#	2022-05-22 15:15:57
2	Simon Nilsson	3759	C#	2019-02-04 21:42:42
3	Pontus Lidholm	4829	C#	2023-08-10 16:08:10

#	User	Length	Language	Date
1	Johan Wind	821	C++	2018-11-16 16:26:57
2	Hidden user	950	C++	2018-11-20 00:02:38
3	Hyunjun Lee	964	C++	2022-11-24 05:05:26
4	鹿目圆	984	C++	2019-07-04 15:17:45
5	Yeung Man Tsung	985	C++	2022-11-20 10:21:58
6	Grae Yeandle	1006	C++	2019-08-25 14:22:58
7	Armen Andreasyan	1040	C++	2018-11-18 12:05:15
8	Paul Wild	1047	C++	2022-04-30 19:19:37
9	吳柏橙	1081	C++	2020-11-18 11:25:10
10	Christian Yongwhan Lim	1153	C++	2023-06-25 02:22:49

#	User	Length	Language	Date
1	Hidden user	2074	Common Lisp	2019-07-24 05:16:29

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	1827	F#	2022-12-17 14:39:47

#	User	Length	Language	Date
1	Norbert Voelker	1831	Go	2021-05-25 18:24:01
2	Ola Dahl	3473	Go	2022-10-25 20:23:43

#	User	Length	Language	Date
1	Håkon Flatval	1330	Haskell	2018-12-01 03:29:41
2	Hidden user	1483	Haskell	2023-01-12 22:23:29
3	Steinar Simonnes	1744	Haskell	2024-03-09 19:33:57
4	Intrets	3916	Haskell	2019-09-06 17:45:44
5	Hidden user	4063	Haskell	2019-08-29 10:20:00

#	User	Length	Language	Date
1	Doug Goodman	1621	Java	2018-12-04 13:30:27
2	Marc Dominic San Pedro	2091	Java	2024-04-15 05:39:47
3	Tommy Maglietto	2164	Java	2025-02-27 00:48:45
4	Andrew Polizzotto	2229	Java	2020-06-08 07:45:26
5	Paul Boddington	2411	Java	2020-07-21 21:41:25
6	Eric Pinter	2418	Java	2019-05-26 06:55:45
7	Nick Wu	2536	Java	2025-10-29 01:16:15
8	Christopher Lee	2615	Java	2025-03-15 18:54:13
9	Godmar Back	2643	Java	2022-09-03 04:25:49
10	Elaica Dela Cruz	2674	Java	2024-10-10 10:05:58

#	User	Length	Language	Date
1	Peter Kedemo	2082	JavaScript (Node.js)	2020-01-02 11:00:44

#	User	Length	Language	Date
1	Jimmy Gustafsson	959	JavaScript (SpiderMonkey)	2022-08-08 20:37:20
2	Christian Pilegaard Cederquist	1421	JavaScript (SpiderMonkey)	2023-02-20 11:44:57
3	Bjørn Chr. Soltvedt	2001	JavaScript (SpiderMonkey)	2018-12-02 14:10:31

#	User	Length	Language	Date
1	Hidden user	1386	Julia	2025-03-02 15:50:28
2	Timothy Gaede	4377	Julia	2024-05-11 09:35:29

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

#	User	Length	Language	Date
1	Daniel Brännvall	1752	Prolog	2023-08-10 23:02:32

#	User	Length	Language	Date
1	Thomas Feld	539	Python 2	2019-09-09 14:33:01
2	Wang Zhi Jian	663	Python 2	2019-05-07 12:11:42
3	Paul Graydon	774	Python 2	2019-02-11 03:47:30
4	Ainun Najib	833	Python 2	2020-10-22 15:21:29
5	Catalin Popa	846	Python 2	2018-11-22 19:40:16
6	Max Holmberg	887	Python 2	2018-11-10 13:50:25
7	Lars Åström	908	Python 2	2018-11-20 09:39:42
8	Måns Magnusson	933	Python 2	2020-03-28 18:34:07
9	Johan Lyts	1065	Python 2	2020-03-30 11:44:39
10	Maj Stenmark	1215	Python 2	2020-03-28 18:23:09

#	User	Length	Language	Date
1	Michael Goldwasser	373	Python 3	2025-09-04 06:59:18
2	Benjamin Z White	375	Python 3	2023-04-08 18:23:55
3	Noah Hessen Bjerke	424	Python 3	2025-11-04 16:24:22
4	Vedran Čačić	463	Python 3	2019-02-04 05:59:45
5	Ahmed Chamseddine	533	Python 3	2024-09-24 08:20:38
6	Brandon Foong	550	Python 3	2023-02-10 04:01:19
7	Johan Sannemo	554	Python 3	2020-09-06 13:12:02
8	Lim Hong Hui Eugene	568	Python 3	2020-04-23 10:05:28
9	Bryan Wong Wei Heng	617	Python 3	2020-02-19 16:31:44
10	Nicholas Russell Saerang	622	Python 3	2023-06-26 03:00:00

#	User	Length	Language	Date
1	Nicholas	2486	Rust	2023-08-15 10:30:07
2	Chris Seager	3096	Rust	2025-03-26 13:27:44
3	Bas Dirks	3154	Rust	2022-02-17 17:16:02
4	Paul Graydon	3202	Rust	2019-02-14 06:01:09
5	Pahlevi Fikri Auliya	3624	Rust	2021-02-27 06:05:07
6	Ola Dahl	4417	Rust	2022-10-26 20:12:50
7	Melker Forsberg	4476	Rust	2023-08-07 20:40:55

Solution running time distribution