Problem A
Test Drive — Problem Statistics

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Submissions	2447
Accepted submissions	1108
Submission ratio	45.28%
Authors	1059
Full solves [?]	978
Full solve Ratio	92.35%

#	User	Runtime	Language	Date
1	Mikael Fiala-Lundström	0.02 s	C#	2022-02-12 16:53:24
2	Göran Andersson	0.02 s	C#	2022-06-12 12:16:50
3	Michal Mroczek (c)	0.02 s	C#	2022-06-17 16:21:40
4	Jakub Jarzabek	0.02 s	C#	2022-06-19 19:00:19
5	Jakub Jarząbek	0.02 s	C#	2022-06-22 08:53:52
6	Hidden user	0.02 s	C#	2022-08-22 12:03:21
7	Yuwono Bangun Nagoro	0.02 s	C#	2022-09-29 13:31:32
8	Ricardo H Guerrero Lara	0.02 s	C#	2022-10-16 05:30:05
9	Ahmad Barhamje	0.02 s	C#	2022-11-26 15:05:38
10	Abdulkerim Kurgas	0.04 s	C#	2023-06-24 21:15:31

#	User	Runtime	Language	Date
1	Tobias Glimmerfors	0.00 s	COBOL	2024-02-28 21:53:12

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.03 s	F#	2022-10-12 12:32:01
2	J Blackquill	0.03 s	F#	2023-01-21 21:52:30

#	User	Runtime	Language	Date
1	Soren Basnet	0.00 s	Go	2025-05-16 05:47:59
2	Norbert Voelker	0.08 s	Go	2022-02-12 19:36:16

#	User	Runtime	Language	Date
1	Ng Tek In	0.00 s	Haskell	2022-08-19 17:48:10
2	Sondre Lunde	0.00 s	Haskell	2023-06-23 10:41:33
3	Steinar Simonnes	0.00 s	Haskell	2024-05-06 11:06:35
4	David Zacek	0.01 s	Haskell	2022-02-12 17:06:13
5	Brent Yorgey	0.01 s	Haskell	2022-02-21 04:43:59

#	User	Runtime	Language	Date
1	Perry Tsai	0.04 s	Java	2025-09-13 18:38:38
2	Fadhil Peer Mohamed	0.04 s	Java	2025-11-26 08:05:01
3	Julius Griebel	0.05 s	Java	2024-05-13 20:50:14
4	Ku Brian	0.05 s	Java	2024-05-16 05:15:20
5	Hussin Suleiman	0.05 s	Java	2024-06-03 16:26:02
6	Yibo Huang	0.06 s	Java	2020-11-14 20:05:04
7	Calvin Godfrey	0.06 s	Java	2020-11-14 20:25:21
8	Stela Palii	0.06 s	Java	2022-02-14 06:31:03
9	Anish Kambhampati	0.06 s	Java	2022-02-15 17:07:32
10	Crystal Sharpe	0.06 s	Java	2022-02-23 22:00:52

#	User	Runtime	Language	Date
1	Minh Trang Nguyen	0.04 s	JavaScript (Node.js)	2025-12-05 11:28:09
2	Md. Johir Uddin	0.04 s	JavaScript (Node.js)	2025-12-11 16:50:44
3	Mikael Olausson	0.08 s	JavaScript (Node.js)	2022-10-27 15:10:38

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-01-18 23:24:11
2	Zach Tschetter	0.02 s	JavaScript (SpiderMonkey)	2023-06-23 04:18:31
3	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-07-27 00:03:54
4	Bjørn Chr. Soltvedt	0.03 s	JavaScript (SpiderMonkey)	2022-03-18 06:27:51

#	User	Runtime	Language	Date
1	Timothy Gaede	0.53 s	Julia	2024-04-11 00:58:06

#	User	Runtime	Language	Date
1	Aksel Holbek Sørbye	0.17 s	Kotlin	2022-10-27 15:08:43
2	Fredrik	0.17 s	Kotlin	2022-10-27 15:33:18
3	Troy Warmboe	0.18 s	Kotlin	2023-04-12 02:49:59
4	Ola Sundell	0.19 s	Kotlin	2023-07-23 16:04:17
5	Adam Rankin	0.20 s	Kotlin	2023-04-28 23:55:08
6	Martijn Muijsers	0.20 s	Kotlin	2024-05-31 22:21:57

#	User	Runtime	Language	Date
1	Renate	0.01 s	PHP	2023-08-12 01:12:07

#	User	Runtime	Language	Date
1	Hakan Kjellerstrand	0.02 s	Prolog	2023-02-15 13:57:16

#	User	Runtime	Language	Date
1	Justin Su	0.03 s	Python 2	2020-11-14 20:08:28
2	Johan Lyts	0.03 s	Python 2	2022-11-17 22:00:09
3	Yanmarshus Bachtiar	0.03 s	Python 2	2023-02-15 06:38:53

#	User	Runtime	Language	Date
1	Akshata S	0.04 s	Python 3	2022-06-05 13:07:02
2	Agata Zdunek	0.04 s	Python 3	2022-06-16 16:27:05
3	Duc Tri Dang	0.04 s	Python 3	2022-06-20 02:26:32
4	Pawel Blaszyk	0.04 s	Python 3	2022-06-21 22:40:24
5	Weiguo Jiang	0.04 s	Python 3	2022-06-23 03:36:37
6	Teikn Smith	0.04 s	Python 3	2022-06-28 03:35:17
7	Drew Wilson	0.04 s	Python 3	2022-07-09 06:31:27
8	Josh Taylor	0.04 s	Python 3	2022-07-12 06:05:10
9	Li Sizhuang	0.04 s	Python 3	2022-07-21 09:02:40
10	Kattis Speedrun	0.04 s	Python 3	2022-07-21 16:01:07

#	User	Runtime	Language	Date
1	Thomas Feld	0.06 s	Ruby	2023-03-29 13:37:30
2	Drew Wilson	0.06 s	Ruby	2023-05-25 19:18:09

#	User	Runtime	Language	Date
1	Bas Dirks	0.00 s	Rust	2022-02-12 10:41:27
2	jskop	0.00 s	Rust	2022-06-20 19:11:52
3	Artur Khuziakhmetov	0.00 s	Rust	2022-09-01 11:01:37
4	Isak Jägberg	0.00 s	Rust	2023-03-23 13:16:44
5	Marcus Östling	0.00 s	Rust	2024-01-10 19:19:02
6	gard heine kalland	0.00 s	Rust	2024-06-16 19:07:55
7	Hidden user	0.00 s	Rust	2025-02-04 00:30:10
8	Vincent Lagerros	0.00 s	Rust	2025-02-23 18:20:31
9	Joshua Freudenhammer	0.00 s	Rust	2025-09-28 02:14:46
10	Adam Martinez	0.00 s	Rust	2026-03-02 14:13:44

#	User	Length	Language	Date
1	Hidden user	320	C	2024-09-28 07:51:06
2	Stephanie Radhakrishnan	357	C	2023-09-14 16:19:43
3	Jonathen Adsit	375	C	2023-07-31 22:36:09
4	Julian Duniec	376	C	2023-08-17 09:41:55
5	Leslie Yip	387	C	2022-10-04 03:48:03
6	vitriol	405	C	2022-03-26 00:29:19
7	Meta Heric	409	C	2023-03-18 19:32:05
8	Nnodim Daniel	418	C	2025-05-16 05:06:37
9	Áquilas Jucá	453	C	2022-03-29 22:38:03
10	Hidden user	459	C	2022-07-28 10:33:51

#	User	Length	Language	Date
1	Ricardo H Guerrero Lara	662	C#	2022-10-16 05:30:05
2	Yuwono Bangun Nagoro	673	C#	2022-09-29 13:31:32
3	Ahmad Barhamje	675	C#	2022-11-26 15:05:38
4	Abdulkerim Kurgas	691	C#	2023-06-24 21:15:31
5	Narek Sargsyan	719	C#	2025-08-31 14:54:29
6	Göran Andersson	784	C#	2022-06-12 12:16:50
7	Hidden user	847	C#	2022-08-22 12:03:21
8	דורון קריטנשטיין	847	C#	2025-09-07 16:34:18
9	Umar Rasyid	895	C#	2025-06-01 01:00:05
10	Mikael Fiala-Lundström	1207	C#	2022-02-12 16:53:24

#	User	Length	Language	Date
1	Yipin Wang	242	C++	2025-09-13 21:06:54
2	Dario Petrillo	279	C++	2022-11-28 20:16:06
3	Meng Siong Hwee	281	C++	2022-11-30 06:14:16
4	Seth Baunach	281	C++	2023-01-21 19:41:38
5	Veclenit Petrus Luca	287	C++	2025-05-14 19:08:24
6	Elias Lolck	290	C++	2023-10-04 12:15:08
7	Aistė Savickaitė	299	C++	2022-05-29 09:47:37
8	Haruto Tanaka	317	C++	2022-10-15 18:06:37
9	Hidden user	318	C++	2024-03-27 16:38:15
10	Ralf Merhof	319	C++	2024-05-20 21:15:25

#	User	Length	Language	Date
1	Tobias Glimmerfors	1072	COBOL	2024-02-28 21:53:12

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	362	F#	2022-10-12 12:33:06
2	J Blackquill	449	F#	2023-01-21 21:52:30

#	User	Length	Language	Date
1	Soren Basnet	398	Go	2025-05-16 05:47:59
2	Norbert Voelker	693	Go	2022-02-12 19:36:16

#	User	Length	Language	Date
1	David Zacek	302	Haskell	2022-02-12 17:06:13
2	Steinar Simonnes	348	Haskell	2024-05-06 11:06:35
3	Brent Yorgey	372	Haskell	2022-02-21 04:43:59
4	Sondre Lunde	475	Haskell	2023-06-23 10:41:33
5	Ng Tek In	705	Haskell	2022-08-19 17:48:10

#	User	Length	Language	Date
1	Nathaniel Lukas Christianto	455	Java	2023-12-26 10:18:06
2	Jona Beckmann	500	Java	2023-05-07 15:03:02
3	Saskia Merkel	523	Java	2022-10-13 00:31:15
4	Danil Braun	534	Java	2022-12-03 07:04:31
5	Siddharth Premjith	553	Java	2022-10-11 23:23:57
6	jin zhang	553	Java	2023-05-08 00:52:24
7	Edward Wei	576	Java	2022-10-11 23:29:15
8	Kushal Trivedi	578	Java	2025-09-13 21:15:59
9	Tyler Lindenmuth	580	Java	2024-01-16 19:52:19
10	Jason	601	Java	2023-05-19 06:50:41

#	User	Length	Language	Date
1	Minh Trang Nguyen	842	JavaScript (Node.js)	2025-12-05 11:28:09
2	Mikael Olausson	953	JavaScript (Node.js)	2022-10-27 15:10:38
3	Md. Johir Uddin	985	JavaScript (Node.js)	2025-12-11 16:50:44

#	User	Length	Language	Date
1	Jimmy Gustafsson	104	JavaScript (SpiderMonkey)	2024-07-27 00:03:54
2	Zach Tschetter	274	JavaScript (SpiderMonkey)	2023-06-23 04:18:31
3	Christian Pilegaard Cederquist	295	JavaScript (SpiderMonkey)	2023-01-18 23:24:11
4	Bjørn Chr. Soltvedt	321	JavaScript (SpiderMonkey)	2022-03-18 06:27:51

#	User	Length	Language	Date
1	Timothy Gaede	747	Julia	2024-04-11 00:58:06

#	User	Length	Language	Date
1	Fredrik	389	Kotlin	2022-10-27 15:33:18
2	Troy Warmboe	444	Kotlin	2023-04-12 02:49:59
3	Adam Rankin	711	Kotlin	2023-04-28 23:55:08
4	Ola Sundell	734	Kotlin	2023-07-23 16:04:17
5	Martijn Muijsers	921	Kotlin	2024-05-31 22:21:57
6	Aksel Holbek Sørbye	1276	Kotlin	2022-10-27 15:08:43

#	User	Length	Language	Date
1	Renate	343	PHP	2023-08-12 01:12:07

#	User	Length	Language	Date
1	Hakan Kjellerstrand	319	Prolog	2023-02-15 13:57:16

#	User	Length	Language	Date
1	Yanmarshus Bachtiar	231	Python 2	2023-02-15 06:38:53
2	Johan Lyts	237	Python 2	2022-11-17 22:00:09
3	Justin Su	253	Python 2	2020-11-22 02:12:46

#	User	Length	Language	Date
1	Thibault Raffaillac	133	Python 3	2023-08-13 16:14:34
2	Benjamin Z White	136	Python 3	2023-05-17 19:03:28
3	Ahmed Chamseddine	145	Python 3	2024-04-09 00:53:48
4	Lee Isaac	147	Python 3	2022-12-05 16:31:38
5	Christofer Ohlsson	150	Python 3	2022-09-11 20:56:49
6	Charles Ancheta	150	Python 3	2023-03-16 06:53:26
7	Farzam Abrishami	158	Python 3	2023-02-19 21:58:39
8	Si Jie Tan	159	Python 3	2026-01-17 04:29:08
9	Paco Criado	166	Python 3	2023-08-12 17:47:30
10	Tai Tze Kin	166	Python 3	2024-05-05 22:55:27

#	User	Length	Language	Date
1	Thomas Feld	100	Ruby	2023-03-29 13:49:37
2	Drew Wilson	235	Ruby	2023-05-25 19:18:09

#	User	Length	Language	Date
1	Vincent Lagerros	591	Rust	2025-02-23 18:20:31
2	Adam Martinez	668	Rust	2026-03-02 14:13:44
3	Isak Jägberg	682	Rust	2023-03-23 13:16:44
4	Artur Khuziakhmetov	711	Rust	2022-09-01 11:01:37
5	Joshua Freudenhammer	942	Rust	2025-09-28 02:14:46
6	Bas Dirks	1047	Rust	2022-02-12 10:41:27
7	jskop	1054	Rust	2022-06-20 19:11:52
8	gard heine kalland	2684	Rust	2024-06-16 19:07:55
9	Marcus Östling	2809	Rust	2024-01-10 19:19:02
10	Hidden user	3479	Rust	2025-02-04 00:30:10

Solution running time distribution