Problem A
ICPC Awards — Problem Statistics

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Submissions	8359
Accepted submissions	4867
Submission ratio	58.22%
Authors	4617
Full solves [?]	4409
Full solve Ratio	95.49%

#	User	Runtime	Language	Date
1	Chenzhang Hu	0.08 s	Bash	2025-04-24 18:01:59
2	Thomas Feld	0.13 s	Bash	2023-09-26 12:00:27

#	User	Runtime	Language	Date
1	Andreas Ljungberg	0.02 s	C#	2017-12-14 20:18:43
2	Jeremiah A. Stringer	0.02 s	C#	2017-12-21 19:59:39
3	Michael Zetterholm	0.02 s	C#	2017-12-23 20:09:16
4	Chase Oberg	0.02 s	C#	2017-12-25 22:54:05
5	Johan Pettersson	0.02 s	C#	2017-12-27 14:24:24
6	Ólafur Andri	0.02 s	C#	2018-01-28 23:09:05
7	Hidden user	0.02 s	C#	2018-01-29 16:56:11
8	Kunwei Zhang	0.02 s	C#	2018-02-04 03:40:59
9	Alex Telon	0.02 s	C#	2018-02-06 20:11:08
10	Faisal Rahman	0.02 s	C#	2018-02-12 01:07:27

#	User	Runtime	Language	Date
1	John Dandy	0.01 s	Common Lisp	2020-02-01 22:49:12
2	David Cawthon	0.01 s	Common Lisp	2020-07-12 03:04:25
3	wibi	0.01 s	Common Lisp	2020-08-23 23:29:45
4	Hidden user	0.02 s	Common Lisp	2019-06-13 07:06:16

#	User	Runtime	Language	Date
1	Carson Black	0.04 s	F#	2022-11-19 00:46:01
2	Tim Mondorf	0.05 s	F#	2021-11-28 09:25:53
3	Jacob Harris Cryer Kragh	0.05 s	F#	2022-06-06 15:07:52

#	User	Runtime	Language	Date
1	Husain Satan	0.00 s	Go	2023-11-08 03:01:35
2	Jimmy Nejtron	0.00 s	Go	2025-01-15 18:58:09
3	Hidden user	0.01 s	Go	2024-03-14 16:04:29
4	NICOLAS EDUARDO GARCIA SANTELICES	0.02 s	Go	2022-07-01 03:51:50
5	Emil Tullstedt	0.07 s	Go	2018-09-24 18:10:42
6	Hidden user	0.07 s	Go	2018-09-27 19:05:57
7	Krzysztof Gibuła	0.07 s	Go	2019-01-14 00:04:59
8	Anmol Sharma	0.08 s	Go	2020-03-17 12:22:55
9	Norbert Voelker	0.08 s	Go	2021-04-09 22:23:43
10	Kok Dith	0.08 s	Go	2021-07-29 16:48:17

#	User	Runtime	Language	Date
1	Nick Pastrana	0.04 s	Java	2024-09-07 21:19:46
2	Youtai Cui	0.04 s	Java	2024-09-17 21:11:06
3	Here Porter	0.04 s	Java	2024-09-20 10:21:34
4	Nathaniel Lahn	0.04 s	Java	2025-02-26 02:15:03
5	Aron Bergman	0.05 s	Java	2017-12-08 09:47:01
6	James Black	0.05 s	Java	2017-12-08 19:20:02
7	Finn Lidbetter	0.05 s	Java	2017-12-09 00:18:10
8	Liam Keliher	0.05 s	Java	2017-12-09 21:27:04
9	Juan David Marín Cerón	0.05 s	Java	2017-12-12 01:39:38
10	Hidden user	0.05 s	Java	2017-12-12 16:26:37

#	User	Runtime	Language	Date
1	Muhammad	0.04 s	JavaScript (Node.js)	2024-10-24 13:09:39
2	Dalton Neely	0.05 s	JavaScript (Node.js)	2018-07-09 07:59:59
3	Christoffer Karlsson	0.05 s	JavaScript (Node.js)	2018-07-22 14:26:50
4	Carl Sundvall	0.05 s	JavaScript (Node.js)	2018-10-27 16:08:40
5	José Lucas	0.05 s	JavaScript (Node.js)	2019-03-15 19:17:47
6	Sander Hellesø	0.05 s	JavaScript (Node.js)	2019-04-14 01:11:54
7	Gurpartap Singh Bhatti	0.05 s	JavaScript (Node.js)	2019-04-14 07:34:34
8	Hidden user	0.05 s	JavaScript (Node.js)	2024-08-20 00:04:31
9	Hidden user	0.06 s	JavaScript (Node.js)	2019-07-02 13:08:27
10	Chris Wong	0.41 s	JavaScript (Node.js)	2021-02-01 15:39:27

#	User	Runtime	Language	Date
1	Nicklas Utgaard	0.01 s	JavaScript (SpiderMonkey)	2017-12-24 15:01:56
2	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2017-12-31 18:38:01
3	Robin Livesey	0.01 s	JavaScript (SpiderMonkey)	2018-04-15 10:01:35
4	Davíð Helgason	0.01 s	JavaScript (SpiderMonkey)	2018-06-24 22:02:40
5	Michael Hjortholt	0.01 s	JavaScript (SpiderMonkey)	2018-07-10 13:48:14
6	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2022-11-09 08:12:40
7	Zach Tschetter	0.02 s	JavaScript (SpiderMonkey)	2023-05-02 20:38:17
8	Evan Magill	0.02 s	JavaScript (SpiderMonkey)	2024-04-26 20:17:58
9	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-06-16 22:55:19
10	Jeremy Loh	0.03 s	JavaScript (SpiderMonkey)	2018-11-01 07:52:26

#	User	Runtime	Language	Date
1	Timothy Gaede	0.55 s	Julia	2024-04-03 07:20:08

#	User	Runtime	Language	Date
1	Albert Pala	0.11 s	Kotlin	2021-05-25 12:47:43
2	Thanh Le	0.11 s	Kotlin	2021-07-14 02:15:50
3	Michail Yaromenko	0.12 s	Kotlin	2022-05-23 15:00:17
4	Jacob Huebner	0.16 s	Kotlin	2020-03-25 22:43:10
5	Ola Sundell	0.18 s	Kotlin	2018-05-04 15:18:49
6	Adam Rankin	0.19 s	Kotlin	2023-05-01 07:11:15
7	Izzati Al Vandiar	0.20 s	Kotlin	2018-01-20 07:35:24
8	Stefan Kennedy	0.20 s	Kotlin	2018-02-24 12:25:34
9	Neil Harmon	0.20 s	Kotlin	2019-04-03 10:22:50
10	Jahid Hasan Imon	0.20 s	Kotlin	2020-05-09 16:22:15

#	User	Runtime	Language	Date
1	Quan Le Huynh Dong	0.00 s	Lua	2024-11-25 04:10:27

#	User	Runtime	Language	Date
1	Alfred Morgan	0.00 s	Nim	2024-09-14 03:02:18

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Odin	2025-05-14 23:21:23

#	User	Runtime	Language	Date
1	Đường Đến Vinh Quang	0.00 s	Pascal	2018-01-04 08:24:51
2	Lànk Trần	0.00 s	Pascal	2018-01-04 08:26:15
3	Trường Nhật Dương	0.00 s	Pascal	2018-01-04 08:35:54
4	Nhật Quang	0.00 s	Pascal	2018-01-04 08:53:32
5	羅棨洭5A14 Law Kai Hong	0.00 s	Pascal	2018-10-11 11:05:26
6	Nhật Nguyễn Minh	0.00 s	Pascal	2021-09-19 05:23:43
7	David Connolly	0.00 s	Pascal	2021-12-06 17:15:45

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.01 s	PHP	2018-03-24 12:07:32
2	Mohammed Yousif	0.01 s	PHP	2018-04-25 21:54:58
3	Emil Riis Hansen	0.01 s	PHP	2018-10-28 21:51:28
4	Helbin Grégory	0.01 s	PHP	2020-02-09 11:25:49
5	Renate	0.01 s	PHP	2021-04-15 12:46:33
6	Andre Wahyudi	0.01 s	PHP	2022-10-18 06:58:47
7	Ilyas Mohetna	0.01 s	PHP	2022-10-19 03:44:13

#	User	Runtime	Language	Date
1	Hadi Qovaizi	0.02 s	Prolog	2018-06-28 21:47:59
2	Andriy Zyevakov	0.02 s	Prolog	2019-08-04 09:14:00
3	Hakan Kjellerstrand	0.02 s	Prolog	2023-02-03 09:18:36

#	User	Runtime	Language	Date
1	Juho Lee	0.02 s	Python 2	2017-12-08 06:03:40
2	Maksym Bendeberia	0.02 s	Python 2	2017-12-08 15:01:54
3	Shaheer Ahmed	0.02 s	Python 2	2017-12-08 21:07:11
4	Andrei Stoica	0.02 s	Python 2	2017-12-10 03:03:37
5	Hermon Mulat	0.02 s	Python 2	2018-01-13 20:05:04
6	Justin Su	0.02 s	Python 2	2018-01-27 21:13:12
7	Fan Zhang	0.02 s	Python 2	2018-02-10 20:43:02
8	Samuel Perkin	0.02 s	Python 2	2018-03-04 15:56:27
9	João Pedro Alvito	0.02 s	Python 2	2018-03-20 19:59:01
10	Frederik Højholt	0.02 s	Python 2	2018-06-19 21:49:46

#	User	Runtime	Language	Date
1	Andrew Fales	0.02 s	Python 3	2017-12-08 03:23:36
2	Ihsan Saktia	0.02 s	Python 3	2017-12-08 04:02:36
3	David Ludwig	0.02 s	Python 3	2017-12-08 04:38:33
4	Thomas Eadie	0.02 s	Python 3	2017-12-08 05:38:43
5	Ram Basnet	0.02 s	Python 3	2017-12-08 06:17:06
6	Ciara Godwin	0.02 s	Python 3	2017-12-08 07:43:58
7	Atli Fannar Franklín	0.02 s	Python 3	2017-12-08 12:06:05
8	Christofer Ohlsson	0.02 s	Python 3	2017-12-08 13:02:45
9	Cliodhna Harrison	0.02 s	Python 3	2017-12-08 13:08:55
10	Hidden user	0.02 s	Python 3	2017-12-08 21:40:35

#	User	Runtime	Language	Date
1	Mona Dadoun	0.03 s	Ruby	2017-12-30 18:05:16
2	Casper Christensen	0.03 s	Ruby	2018-01-01 18:30:01
3	Paul Vinell	0.03 s	Ruby	2018-03-09 14:32:18
4	Jason Cheong-Kee-You	0.04 s	Ruby	2018-05-28 03:08:04
5	Daniel Harder	0.04 s	Ruby	2018-09-01 02:13:08
6	Hidden user	0.04 s	Ruby	2018-09-30 08:49:52
7	Hidden user	0.04 s	Ruby	2019-03-15 19:42:26
8	Davi Guimarães Leite	0.04 s	Ruby	2019-03-15 19:42:41
9	Macdara mac an tSionnaigh	0.04 s	Ruby	2019-09-30 00:35:10
10	Hidden user	0.05 s	Ruby	2018-09-27 18:48:11

#	User	Length	Language	Date
1	Chenzhang Hu	38	Bash	2025-09-13 02:41:04
2	Thomas Feld	45	Bash	2023-09-26 12:00:27

#	User	Length	Language	Date
1	Martin Blom	195	C	2023-10-19 13:16:12
2	Velvet	360	C	2020-12-09 15:37:22
3	Stian Toften	390	C	2021-04-18 19:56:25
4	Mickael Torres	416	C	2018-04-21 18:07:43
5	Bokor	416	C	2018-05-17 13:51:44
6	Stanley Wisely	441	C	2021-01-20 07:18:37
7	Grayce Zhu	442	C	2019-01-18 16:26:27
8	Hidden user	475	C	2020-01-13 16:46:49
9	Sadia Hossain	477	C	2020-12-04 05:21:37
10	Charlot DEDJINOU	479	C	2022-03-30 01:49:45

#	User	Length	Language	Date
1	Gregory Sinclair	272	C#	2023-11-14 19:05:20
2	李陆屿	452	C#	2019-01-25 08:50:00
3	bhanu prakash konda	497	C#	2023-10-05 05:55:12
4	Sravani Dondapati	502	C#	2023-10-09 00:28:27
5	Peter Nordh	552	C#	2018-06-10 19:15:59
6	Nikhil	555	C#	2023-10-08 22:14:15
7	André Engen	556	C#	2021-03-17 15:11:54
8	Medha Alla	556	C#	2023-10-08 20:11:11
9	shanmuka rana prathap chowdary ponnaganti	580	C#	2023-10-09 04:33:50
10	Göran Andersson	589	C#	2022-05-08 17:54:49

#	User	Length	Language	Date
1	Houda Sassi	227	C++	2018-01-18 20:15:23
2	Pham Vu Tran	244	C++	2017-12-08 17:17:49
3	Mesut Melih Akpinar	247	C++	2019-09-02 09:51:43
4	Emmanuel Anaya	255	C++	2020-10-22 07:00:47
5	塗大為	262	C++	2018-09-22 08:23:16
6	Frederick Pek	276	C++	2021-05-17 08:03:13
7	Alfin Herianto	278	C++	2018-11-24 15:15:33
8	Nishan Tamng	279	C++	2018-01-31 16:22:35
9	Tobias Lehnert	280	C++	2018-11-11 14:35:36
10	Dương Lê Phước Trung	285	C++	2018-11-09 17:32:37

#	User	Length	Language	Date
1	Hidden user	358	Common Lisp	2019-06-13 07:06:16
2	wibi	434	Common Lisp	2020-08-23 23:29:45
3	John Dandy	734	Common Lisp	2020-02-01 22:49:12
4	David Cawthon	758	Common Lisp	2020-07-12 03:04:25

#	User	Length	Language	Date
1	Carson Black	378	F#	2022-11-19 00:46:01
2	Tim Mondorf	461	F#	2021-11-28 09:25:53
3	Jacob Harris Cryer Kragh	744	F#	2022-06-06 15:07:52

#	User	Length	Language	Date
1	Hidden user	222	Go	2021-12-15 12:51:34
2	Hidden user	270	Go	2018-09-27 19:05:57
3	Krzysztof Gibuła	388	Go	2019-01-14 00:04:59
4	Emil Tullstedt	389	Go	2018-09-24 18:10:42
5	Andreas Gottschalk Krath	401	Go	2022-04-13 16:32:46
6	Hidden user	409	Go	2024-03-14 16:04:29
7	Jimmy Nejtron	464	Go	2025-01-15 18:58:09
8	Kok Dith	466	Go	2021-07-29 16:48:17
9	Ng Tze Sheng	472	Go	2020-03-12 07:12:19
10	Neal McCarthy	491	Go	2018-04-15 22:28:22

#	User	Length	Language	Date
1	Morten Lohne	201	Haskell	2018-06-29 17:39:06
2	Monique Oliveira	219	Haskell	2021-05-09 08:35:40
3	Freek van Keulen	222	Haskell	2021-02-15 09:13:37
4	Jan Hrček	273	Haskell	2019-05-08 16:25:43
5	Oisín Mac Fhearaí	290	Haskell	2021-01-10 20:06:49
6	Brent Yorgey	291	Haskell	2017-12-21 03:48:46
7	Matthew A Johnson	306	Haskell	2017-12-12 03:46:33
8	Lieven Marchand	311	Haskell	2018-01-18 13:59:48
9	Tom Magnusson	313	Haskell	2020-03-31 07:10:53
10	Morten Clausen	327	Haskell	2019-01-02 17:25:26

#	User	Length	Language	Date
1	Lim Ting Kai	338	Java	2023-05-22 18:30:22
2	Prakash Sanyasi	365	Java	2018-09-29 21:16:32
3	Doug Goodman	385	Java	2018-01-02 20:38:47
4	Evelyn Vo	395	Java	2020-07-14 06:17:15
5	Travis Meade	401	Java	2018-02-03 19:15:38
6	Auburn Ford	411	Java	2019-02-12 03:06:54
7	Robert Slutsky	436	Java	2018-01-25 01:01:03
8	Ali Pervaiz	437	Java	2019-03-20 16:05:55
9	Troels Bjerre Lund	450	Java	2018-10-07 19:52:24
10	Daniel Sutantyo	450	Java	2021-09-10 07:24:54

#	User	Length	Language	Date
1	Karim Dridi	376	JavaScript (Node.js)	2022-01-14 16:45:20
2	Christoffer Karlsson	439	JavaScript (Node.js)	2018-07-22 14:26:50
3	Chris Wong	470	JavaScript (Node.js)	2021-02-01 15:39:27
4	José Lucas	511	JavaScript (Node.js)	2019-03-15 19:17:47
5	Peter Kedemo	511	JavaScript (Node.js)	2019-12-20 21:10:09
6	Kolliboina, Sai Praneet	526	JavaScript (Node.js)	2021-03-16 03:29:17
7	Koustav Dutta	537	JavaScript (Node.js)	2021-03-21 17:21:43
8	yeshwanth soma	551	JavaScript (Node.js)	2021-03-16 02:06:39
9	Avinash Reddy	554	JavaScript (Node.js)	2021-03-15 17:53:02
10	Veganti Nagababu	566	JavaScript (Node.js)	2021-03-15 18:23:23

#	User	Length	Language	Date
1	Jimmy Gustafsson	116	JavaScript (SpiderMonkey)	2024-06-16 22:55:19
2	Christian Pilegaard Cederquist	132	JavaScript (SpiderMonkey)	2022-11-09 08:12:40
3	Peter Menyes	221	JavaScript (SpiderMonkey)	2020-12-30 18:02:57
4	Evan Magill	223	JavaScript (SpiderMonkey)	2024-04-26 20:17:58
5	Bjørn Chr. Soltvedt	234	JavaScript (SpiderMonkey)	2017-12-31 18:38:01
6	Bernard Perrin	235	JavaScript (SpiderMonkey)	2019-01-21 22:19:39
7	Michael Hjortholt	257	JavaScript (SpiderMonkey)	2018-07-10 13:48:14
8	Zach Tschetter	262	JavaScript (SpiderMonkey)	2023-05-02 20:38:17
9	Robin Livesey	286	JavaScript (SpiderMonkey)	2018-04-15 10:01:35
10	Casey Smith	300	JavaScript (SpiderMonkey)	2019-05-28 18:31:12

#	User	Length	Language	Date
1	Timothy Gaede	347	Julia	2024-04-03 07:20:08

#	User	Length	Language	Date
1	Troy Warmboe	264	Kotlin	2020-02-05 21:42:00
2	Magnus Wass	288	Kotlin	2020-12-15 20:25:12
3	Adam Rankin	308	Kotlin	2023-05-01 07:11:15
4	Hidden user	321	Kotlin	2020-03-11 23:56:03
5	Jahid Hasan Imon	342	Kotlin	2020-05-09 16:22:15
6	Izzati Al Vandiar	344	Kotlin	2018-01-20 07:35:24
7	Nicholas Johnson	356	Kotlin	2021-04-19 02:10:10
8	axl	359	Kotlin	2019-08-05 14:01:40
9	Stefan Kennedy	388	Kotlin	2018-02-24 12:25:34
10	Frangel Hernández Martinez	391	Kotlin	2018-04-25 18:38:35

#	User	Length	Language	Date
1	Quan Le Huynh Dong	610	Lua	2024-11-25 04:10:27

#	User	Length	Language	Date
1	Alfred Morgan	457	Nim	2024-09-14 03:02:18

#	User	Length	Language	Date
1	Hidden user	648	Odin	2025-05-14 23:21:23

#	User	Length	Language	Date
1	Lànk Trần	378	Pascal	2018-01-04 08:26:15
2	Đường Đến Vinh Quang	461	Pascal	2018-01-04 08:24:51
3	羅棨洭5A14 Law Kai Hong	561	Pascal	2018-10-11 11:05:26
4	Nhật Nguyễn Minh	598	Pascal	2021-09-19 05:23:43
5	Trường Nhật Dương	735	Pascal	2018-01-04 08:35:54
6	Nhật Quang	744	Pascal	2018-01-04 08:53:32
7	David Connolly	1125	Pascal	2021-12-06 17:15:45

#	User	Length	Language	Date
1	Mohammed Yousif	344	PHP	2018-04-25 21:54:58
2	Renate	411	PHP	2021-04-15 12:46:33
3	Ilyas Mohetna	519	PHP	2022-10-19 03:44:13
4	Emil Riis Hansen	567	PHP	2018-10-28 21:51:28
5	Andre Wahyudi	649	PHP	2022-10-18 06:58:47
6	Ingemar Ragnemalm	930	PHP	2018-03-24 12:07:32
7	Helbin Grégory	997	PHP	2020-02-09 11:25:49

#	User	Length	Language	Date
1	Hakan Kjellerstrand	387	Prolog	2023-02-03 09:18:36
2	Andriy Zyevakov	798	Prolog	2019-08-04 09:14:00
3	Hadi Qovaizi	2427	Prolog	2018-06-28 21:47:59

#	User	Length	Language	Date
1	Thomas Feld	130	Python 2	2019-08-19 15:12:13
2	Guan Yang Ze	163	Python 2	2019-09-07 12:44:35
3	Eoin Davey	177	Python 2	2017-12-23 16:42:51
4	Jesus Villarruel	182	Python 2	2017-12-10 07:51:45
5	Sigurður Jens Albertsson	182	Python 2	2017-12-13 22:13:50
6	Nick Wu	185	Python 2	2017-12-16 04:44:46
7	Andreas Eisele	190	Python 2	2018-09-09 17:10:57
8	Klas af Geijerstam	190	Python 2	2018-10-04 12:43:09
9	Conor McCauley	191	Python 2	2019-03-20 02:51:28
10	Andreas Björklund	191	Python 2	2019-08-17 16:05:38

#	User	Length	Language	Date
1	Clement Oh	86	Python 3	2023-06-18 09:53:00
2	Gustav Elmqvist	93	Python 3	2023-03-28 19:46:08
3	Charles Ancheta	94	Python 3	2023-03-28 05:35:57
4	Alexandre Charland	99	Python 3	2024-08-24 03:22:31
5	Tam Keng Hong	105	Python 3	2023-01-05 03:32:54
6	Eduardo Vicente Petry	110	Python 3	2023-02-06 03:47:41
7	Timothy White	119	Python 3	2021-10-20 02:04:09
8	Simen Sørensen	120	Python 3	2025-09-16 01:51:43
9	Tistou	126	Python 3	2021-10-17 23:25:52
10	Tai Tze Kin	127	Python 3	2024-05-01 23:07:35

#	User	Length	Language	Date
1	Thomas Feld	28	Ruby	2022-12-07 12:42:06
2	Gustav Elmqvist	28	Ruby	2023-03-28 20:45:59
3	Chenzhang Hu	137	Ruby	2025-09-22 17:16:26
4	Régis Hanol	144	Ruby	2022-01-07 00:17:41
5	Casper Christensen	155	Ruby	2018-01-01 18:30:01
6	Jason Cheong-Kee-You	156	Ruby	2018-05-28 03:08:04
7	Alexander Bilde Pedersen	172	Ruby	2023-05-02 08:39:05
8	Hidden user	178	Ruby	2018-10-04 09:26:28
9	Macdara mac an tSionnaigh	198	Ruby	2019-09-30 00:35:10
10	Daniel Harder	207	Ruby	2018-09-01 02:13:08

#	User	Length	Language	Date
1	Vincent Lagerros	301	Rust	2025-02-03 20:22:21
2	Emil Dichmann	398	Rust	2025-09-23 13:14:29
3	Hidden user	494	Rust	2018-11-04 21:49:39
4	Théo Dislay	513	Rust	2021-03-20 22:12:22
5	Dan Wolff	538	Rust	2021-03-19 19:54:20
6	Hidden user	560	Rust	2018-11-06 00:50:59
7	Artur Khuziakhmetov	569	Rust	2023-08-09 11:05:18
8	Chaoyi Yin	576	Rust	2019-03-20 18:26:11
9	Mattéo Ladrat	590	Rust	2021-01-23 13:48:14
10	Hovig Manjikian	600	Rust	2020-01-11 01:35:53

Solution running time distribution