Problem A
Classrooms — Problem Statistics

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Submissions	15566
Accepted submissions	2542
Submission ratio	16.33%
Authors	2009
Full solves [?]	1386
Full solve Ratio	68.99%

#	User	Runtime	Language	Date
1	Christian Pletbjerg	0.13 s	C	2023-08-05 07:47:27

#	User	Runtime	Language	Date
1	Tobias Bjerge Bang	0.42 s	C#	2020-09-05 11:13:48
2	Elias Lolck	0.58 s	C#	2022-04-05 05:15:39
3	Agatha	0.71 s	C#	2024-12-09 16:38:09
4	Adam James Negaard	0.88 s	C#	2022-09-11 10:17:28
5	Lukas L. Hjelmstrand	0.89 s	C#	2024-09-09 19:36:15

#	User	Runtime	Language	Date
1	Troels Bjerre Lund	0.05 s	C++	2020-09-10 12:07:17
2	Leif Eriksson	0.07 s	C++	2022-02-17 16:18:48
3	กฤษฏิ์ พรไพรินทร์	0.08 s	C++	2017-07-08 19:49:26
4	Abdul Malik Nurrokhman	0.08 s	C++	2018-06-09 10:41:09
5	Agis Daniels	0.08 s	C++	2020-05-09 22:34:31
6	Theodore Wang	0.08 s	C++	2021-08-17 18:36:24
7	Frank Endriss	0.08 s	C++	2021-11-23 18:13:24
8	Roger Chen	0.08 s	C++	2022-05-19 04:34:42
9	YanHao Ling	0.08 s	C++	2024-10-08 10:36:35
10	Lawry Sorenson	0.08 s	C++	2025-05-21 02:27:33

#	User	Runtime	Language	Date
1	Hidden user	0.77 s	Common Lisp	2019-07-10 09:29:40

#	User	Runtime	Language	Date
1	Christian Pletbjerg	0.76 s	Haskell	2022-10-19 06:01:05
2	Hidden user	0.77 s	Haskell	2022-10-19 05:42:28
3	Mckinley Xie	0.97 s	Haskell	2025-02-21 04:38:36

#	User	Runtime	Language	Date
1	Troels Bjerre Lund	0.31 s	Java	2020-09-04 23:50:23
2	Shreyas Jamadagni	0.62 s	Java	2025-03-11 09:09:51
3	Way Tan	0.63 s	Java	2019-05-08 18:52:16
4	Josenildo Silva	0.65 s	Java	2017-07-08 04:44:58
5	Ray Bai	0.66 s	Java	2022-09-20 23:44:14
6	Abegail Lacsena	0.67 s	Java	2023-08-03 04:34:33
7	Zihan Wang	0.68 s	Java	2023-03-31 09:09:09
8	Grace Tuomala	0.68 s	Java	2024-02-17 23:38:31
9	The Brainiest Ashes Ever	0.68 s	Java	2024-02-23 19:16:38
10	Jake	0.68 s	Java	2024-02-25 04:12:10

#	User	Runtime	Language	Date
1	Christian Cederquist	0.57 s	JavaScript (SpiderMonkey)	2023-10-12 09:43:29

#	User	Runtime	Language	Date
1	Andreas Wassum	0.96 s	Kotlin	2019-08-31 09:17:31
2	Min-Zheng Shieh	1.53 s	Kotlin	2021-04-23 13:51:05
3	Danny Mittal	2.06 s	Kotlin	2022-09-21 01:26:00

#	User	Runtime	Language	Date
1	Oskar Haarklou Veileborg	0.61 s	Python 2	2020-09-21 13:28:22
2	Troels Bjerre Lund	0.63 s	Python 2	2020-09-04 22:34:33
3	Andreas Björklund	1.21 s	Python 2	2019-05-24 07:28:44

#	User	Runtime	Language	Date
1	Nikolaj Munk Binder Jensen	0.62 s	Python 3	2024-09-06 11:31:36
2	Oskar Haarklou Veileborg	0.69 s	Python 3	2020-09-21 13:23:23
3	Troels Bjerre Lund	0.73 s	Python 3	2020-09-04 22:23:52
4	Zain Khan	0.76 s	Python 3	2025-07-19 18:55:33
5	Jonathan Cederlund	0.87 s	Python 3	2023-08-24 16:25:36
6	Thore Husfeldt	0.88 s	Python 3	2020-09-10 13:40:15
7	Yi-Min Seah	0.91 s	Python 3	2022-02-20 14:05:25
8	Annabell Blaumann	0.94 s	Python 3	2022-11-20 16:37:57
9	John Zheng	1.00 s	Python 3	2022-11-04 03:09:24
10	Isaac Lee	1.06 s	Python 3	2025-02-13 04:59:47

#	User	Runtime	Language	Date
1	Frederik Petersen	1.62 s	Ruby	2025-09-03 16:15:21

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.06 s	Rust	2024-09-30 16:53:38
2	Hidden user	0.08 s	Rust	2022-12-07 16:12:54
3	Daniel Anker Hermansen	0.09 s	Rust	2023-08-25 18:36:51
4	Egor Kulikov	0.10 s	Rust	2024-11-01 10:24:08
5	Gangnam Style	0.10 s	Rust	2024-11-28 14:36:56
6	Liam Thorell	0.10 s	Rust	2024-11-28 19:29:40
7	Jakub Jagiello	0.11 s	Rust	2020-12-06 19:01:36
8	Klas af Geijerstam	0.11 s	Rust	2022-11-22 12:35:06
9	Muhammad Rais Fathin Mudzakir	0.12 s	Rust	2021-05-11 21:48:24
10	Niklas Sandén	0.12 s	Rust	2023-03-22 19:33:58

#	User	Runtime	Language	Date
1	Zain Khan	0.12 s	Zig	2025-02-26 04:55:26

#	User	Length	Language	Date
1	Christian Pletbjerg	42723	C	2023-08-05 07:47:27

#	User	Length	Language	Date
1	Lukas L. Hjelmstrand	782	C#	2024-09-09 19:36:15
2	Agatha	2101	C#	2024-12-10 12:17:52
3	Adam James Negaard	2583	C#	2022-09-11 10:14:02
4	Elias Lolck	3106	C#	2022-04-05 05:15:39
5	Tobias Bjerge Bang	22710	C#	2020-09-05 11:38:58

#	User	Length	Language	Date
1	Lawry Sorenson	277	C++	2025-05-21 02:30:38
2	Daniel Rasmussen	369	C++	2023-05-19 09:28:03
3	Rumbin Lee	420	C++	2023-05-19 16:34:19
4	ณัฐวุฒิ เจนศักดิ์ดา	487	C++	2024-01-16 12:51:52
5	Mugeon Kim	487	C++	2024-05-21 07:30:42
6	陳楷元	488	C++	2024-05-08 14:57:54
7	Elias Lolck	489	C++	2023-05-18 16:34:34
8	Yeoh Han Yi	500	C++	2025-04-16 16:37:12
9	Quanmeng Wang	506	C++	2016-10-12 04:06:46
10	Beichen Sun	506	C++	2025-02-09 14:51:52

#	User	Length	Language	Date
1	Hidden user	7551	Common Lisp	2019-07-10 04:24:45

#	User	Length	Language	Date
1	Mckinley Xie	449	Haskell	2025-02-21 04:49:42
2	Christian Pletbjerg	2679	Haskell	2022-10-19 06:01:05
3	Hidden user	2706	Haskell	2022-10-19 05:42:28

#	User	Length	Language	Date
1	Atharva Nagarkar	1265	Java	2019-03-31 06:29:31
2	Hidden user	1308	Java	2025-05-04 05:12:48
3	Sathwika Deegutla	1325	Java	2024-02-22 01:33:36
4	Gabriel Perez	1365	Java	2024-02-29 04:07:51
5	Hidden user	1381	Java	2025-09-09 15:08:39
6	Troels Bjerre Lund	1385	Java	2020-09-05 18:54:33
7	Alsion Tafa	1422	Java	2024-02-28 04:09:08
8	John Massung	1423	Java	2024-02-28 22:35:39
9	Eric Leow Yu Quan	1426	Java	2021-12-16 06:29:18
10	Collin Jakubik	1451	Java	2021-11-09 20:13:16

#	User	Length	Language	Date
1	Christian Cederquist	5804	JavaScript (SpiderMonkey)	2023-10-12 09:43:29

#	User	Length	Language	Date
1	Danny Mittal	816	Kotlin	2022-09-21 01:26:00
2	Min-Zheng Shieh	1182	Kotlin	2021-04-23 13:51:05
3	Andreas Wassum	4005	Kotlin	2019-08-31 09:17:31

#	User	Length	Language	Date
1	Andreas Björklund	811	Python 2	2019-05-24 07:28:44
2	Troels Bjerre Lund	875	Python 2	2020-09-04 22:34:33
3	Oskar Haarklou Veileborg	1330	Python 2	2020-09-21 13:28:22

#	User	Length	Language	Date
1	Nikolaj Munk Binder Jensen	176	Python 3	2025-02-16 10:12:29
2	Dante Bencivenga	259	Python 3	2022-10-08 01:07:39
3	Leonardo Canello	350	Python 3	2022-10-26 15:25:34
4	Felix Fatum	380	Python 3	2024-09-04 18:31:15
5	egert adramus	432	Python 3	2025-06-01 15:06:23
6	Anthony Nguyen	459	Python 3	2023-04-01 19:15:39
7	Laith Bohsali	462	Python 3	2025-02-19 21:31:07
8	Hidden user	473	Python 3	2025-02-17 23:50:48
9	Ha Truong	478	Python 3	2024-05-27 06:13:04
10	Jin Seok Oh	481	Python 3	2025-02-20 19:18:18

#	User	Length	Language	Date
1	Frederik Petersen	704	Ruby	2025-09-03 16:15:21

#	User	Length	Language	Date
1	Liam Thorell	1501	Rust	2024-11-28 19:29:40
2	Hidden user	1588	Rust	2022-12-07 16:12:54
3	Carl Forsinge	2089	Rust	2024-10-27 20:50:13
4	Gangnam Style	3444	Rust	2024-11-28 14:36:56
5	Muhammad Rais Fathin Mudzakir	4396	Rust	2021-05-11 01:52:40
6	Klas af Geijerstam	13253	Rust	2022-11-22 12:35:06
7	Jakub Jagiello	14701	Rust	2020-12-06 19:01:36
8	Vincent Lagerros	16632	Rust	2024-09-30 16:53:38
9	Egor Kulikov	17864	Rust	2024-11-01 10:24:08
10	Niklas Sandén	26703	Rust	2023-03-22 19:33:58

#	User	Length	Language	Date
1	Zain Khan	6578	Zig	2025-02-26 04:55:26

Solution running time distribution