Problem A
Illuminated City — Problem Statistics

Back to problem description

Submissions	1527
Accepted submissions	866
Submission ratio	56.71%
Authors	470
Full solves [?]	416
Full solve Ratio	88.51%

#	User	Score	Language	Date
1	Levi Migom	100	C	2024-03-21 20:17:35
2	Naveen Kumar S	100	C	2025-04-06 16:49:05
3	Kevin Nyman	40	C	2023-11-23 19:31:10

#	User	Score	Language	Date
1	Ture Söderbergh	100	C#	2023-11-23 18:31:38
2	Yichen Hu	100	C#	2023-11-23 19:07:01
3	Pontus Lindell	100	C#	2023-12-07 13:10:13
4	Freek van Keulen	100	C#	2024-03-22 08:07:34
5	traxex	100	C#	2024-06-03 13:10:06
6	Ihor Kolisnyk	100	C#	2024-10-18 17:45:48
7	Joel Hardeberg	100	C#	2024-11-20 12:27:32
8	Akib Ibn Zahid	100	C#	2025-11-17 10:48:42

#	User	Score	Language	Date
1	Norbert Voelker	100	Go	2023-11-28 15:26:25
2	Suka Isnaini	100	Go	2023-12-13 17:53:33
3	Thomas	100	Go	2024-01-24 18:49:29
4	Martin Stensgård	100	Go	2024-04-05 06:26:16

#	User	Score	Language	Date
1	Elias	100	Haskell	2023-11-24 14:00:32
2	Hidden user	100	Haskell	2023-11-28 13:03:40
3	Brent Yorgey	100	Haskell	2023-11-29 16:19:48
4	Félix Martins	100	Haskell	2024-01-05 17:37:55
5	Fritiof Rusck	100	Haskell	2024-02-07 14:46:56
6	Steinar Simonnes	100	Haskell	2025-01-01 20:14:03

#	User	Score	Language	Date
1	Minh Trang Nguyen	100	JavaScript (Node.js)	2025-11-18 21:15:45
2	Md. Johir Uddin	100	JavaScript (Node.js)	2025-11-20 12:22:53

#	User	Score	Language	Date
1	Bjørn Chr. Soltvedt	100	JavaScript (SpiderMonkey)	2023-11-28 08:53:33
2	Christian Pilegaard Cederquist	100	JavaScript (SpiderMonkey)	2023-11-30 05:42:09
3	Jimmy Gustafsson	100	JavaScript (SpiderMonkey)	2024-08-16 14:26:34
4	Aryan Swaminath	40	JavaScript (SpiderMonkey)	2024-01-24 01:37:40

#	User	Score	Language	Date
1	Timothy Gaede	100	Julia	2024-04-27 07:42:02

#	User	Score	Language	Date
1	Martijn Muijsers	100	Kotlin	2024-06-04 10:30:24
2	Adam Rankin	40	Kotlin	2023-12-15 23:04:26

#	User	Score	Language	Date
1	Renate	100	PHP	2024-04-07 21:06:57

#	User	Score	Language	Date
1	Miorel Palii	100	Ruby	2024-01-16 02:19:29
2	Thomas Feld	100	Ruby	2024-04-04 09:26:57

#	User	Score	Language	Date
1	David Rasch	100	Rust	2023-11-28 10:37:50
2	Daniel Anker Hermansen	100	Rust	2023-12-29 12:16:19
3	Bas Dirks	100	Rust	2023-12-31 13:56:05
4	Frank Endriss	100	Rust	2024-06-17 09:08:02
5	Vincent Lagerros	100	Rust	2025-02-16 19:08:23

#	User	Runtime	Language	Date
1	Levi Migom	0.01 s	C	2024-03-21 20:17:35
2	Naveen Kumar S	0.02 s	C	2025-04-06 16:49:05

#	User	Runtime	Language	Date
1	Pontus Lindell	0.05 s	C#	2023-12-07 13:10:13
2	Yichen Hu	0.06 s	C#	2023-11-23 19:07:01
3	Freek van Keulen	0.06 s	C#	2024-03-22 08:07:34
4	traxex	0.06 s	C#	2024-06-03 13:10:06
5	Joel Hardeberg	0.06 s	C#	2024-11-20 12:27:32
6	Ihor Kolisnyk	0.07 s	C#	2024-10-18 17:45:48
7	Akib Ibn Zahid	0.07 s	C#	2025-11-17 10:48:42
8	Ture Söderbergh	0.11 s	C#	2023-11-23 18:31:38

#	User	Runtime	Language	Date
1	Alexander Kravberg	0.00 s	C++	2023-12-26 02:30:11
2	Hugo Markstad	0.01 s	C++	2023-11-23 18:13:09
3	Anastasiia Saranchina	0.01 s	C++	2023-11-23 18:15:20
4	Malte Dickson	0.01 s	C++	2023-11-23 18:21:12
5	Victor Vatn	0.01 s	C++	2023-11-23 18:28:42
6	Theodor Beskow	0.01 s	C++	2023-11-23 18:31:09
7	Ellinor Åhlander	0.01 s	C++	2023-11-23 18:31:29
8	Elias Lindstenz	0.01 s	C++	2023-11-23 18:37:12
9	Vladyslav Levchenko	0.01 s	C++	2023-11-23 19:11:20
10	Raunak Redkar	0.01 s	C++	2023-11-24 01:39:47

#	User	Runtime	Language	Date
1	Norbert Voelker	0.01 s	Go	2023-11-28 15:26:25
2	Thomas	0.01 s	Go	2024-01-24 18:49:29
3	Suka Isnaini	0.37 s	Go	2023-12-13 17:53:33
4	Martin Stensgård	0.37 s	Go	2024-04-05 06:26:16

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.01 s	Haskell	2025-01-01 20:14:03
2	Brent Yorgey	0.14 s	Haskell	2023-11-29 16:19:48
3	Hidden user	0.26 s	Haskell	2023-11-28 13:03:40
4	Félix Martins	0.26 s	Haskell	2024-01-05 17:37:55
5	Fritiof Rusck	0.27 s	Haskell	2024-02-07 14:46:56
6	Elias	0.28 s	Haskell	2023-11-24 14:00:32

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.07 s	Java	2023-12-01 16:20:03
2	Lee Jie-Ren Benedict	0.17 s	Java	2024-11-23 08:48:49
3	Neo Wei Jun Samuel	0.19 s	Java	2024-07-13 16:28:48
4	Sam Freund	0.22 s	Java	2024-05-15 04:57:47
5	Elanur Görgülü	0.24 s	Java	2023-11-26 14:17:01
6	Tan Wee Kian, Justin	0.25 s	Java	2023-12-10 14:28:10
7	Ranjith M	0.26 s	Java	2023-12-03 00:31:46
8	Achim Ahlers	0.29 s	Java	2023-12-12 03:52:37
9	Jonas Boll Esser	0.29 s	Java	2024-02-23 17:12:09
10	Julius Griebel	0.31 s	Java	2023-12-21 10:02:36

#	User	Runtime	Language	Date
1	Minh Trang Nguyen	0.08 s	JavaScript (Node.js)	2025-11-18 21:15:45
2	Md. Johir Uddin	0.09 s	JavaScript (Node.js)	2025-11-20 12:22:53

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.04 s	JavaScript (SpiderMonkey)	2023-11-28 08:53:33
2	Christian Pilegaard Cederquist	0.04 s	JavaScript (SpiderMonkey)	2023-11-30 05:42:09
3	Jimmy Gustafsson	0.06 s	JavaScript (SpiderMonkey)	2024-08-16 14:26:34

#	User	Runtime	Language	Date
1	Timothy Gaede	0.57 s	Julia	2024-04-27 07:42:02

#	User	Runtime	Language	Date
1	Martijn Muijsers	0.45 s	Kotlin	2024-06-04 10:30:24

#	User	Runtime	Language	Date
1	Renate	0.09 s	PHP	2024-04-07 21:06:57

#	User	Runtime	Language	Date
1	Simen Sørensen	0.06 s	Python 3	2024-09-28 00:34:58
2	Hidden user	0.06 s	Python 3	2024-10-06 21:03:24
3	Kasper Johansson	0.06 s	Python 3	2024-10-23 19:25:26
4	Petr	0.06 s	Python 3	2024-11-04 16:31:46
5	Edvin Loberg	0.06 s	Python 3	2024-11-26 09:28:19
6	Ivan Chew	0.06 s	Python 3	2024-12-01 16:25:21
7	Steinar Simonnes	0.06 s	Python 3	2025-01-01 20:07:36
8	Rafael Kristoforus Yanto	0.06 s	Python 3	2025-02-21 15:15:29
9	Rajul Srivastava	0.06 s	Python 3	2025-04-14 18:54:16
10	Srikavin S	0.06 s	Python 3	2025-04-21 15:00:54

#	User	Runtime	Language	Date
1	Miorel Palii	0.11 s	Ruby	2024-01-16 02:19:29
2	Thomas Feld	0.11 s	Ruby	2024-04-04 09:30:35

#	User	Runtime	Language	Date
1	Vincent Lagerros	0.00 s	Rust	2025-02-16 19:08:23
2	David Rasch	0.01 s	Rust	2023-11-28 10:37:50
3	Daniel Anker Hermansen	0.01 s	Rust	2023-12-29 12:16:19
4	Bas Dirks	0.01 s	Rust	2023-12-31 13:56:05
5	Frank Endriss	0.01 s	Rust	2024-06-17 09:08:02

#	User	Length	Language	Date
1	Levi Migom	725	C	2024-03-21 20:17:35
2	Naveen Kumar S	775	C	2025-04-06 16:49:05

#	User	Length	Language	Date
1	traxex	406	C#	2024-06-03 13:10:06
2	Ihor Kolisnyk	450	C#	2024-10-18 17:45:48
3	Freek van Keulen	547	C#	2024-03-22 08:07:34
4	Joel Hardeberg	686	C#	2024-11-20 12:27:32
5	Akib Ibn Zahid	769	C#	2025-11-17 10:48:42
6	Ture Söderbergh	806	C#	2023-11-23 18:31:38
7	Pontus Lindell	996	C#	2023-12-07 13:10:13
8	Yichen Hu	1083	C#	2023-11-23 19:07:01

#	User	Length	Language	Date
1	Ernest Ng Zi Xuan	334	C++	2024-03-24 05:31:30
2	Armen Andreasyan	342	C++	2024-03-28 05:52:00
3	Zac Friggstad	348	C++	2024-02-19 03:48:06
4	Clement Oh	383	C++	2024-03-05 05:53:37
5	Ryan Wu	389	C++	2024-01-27 18:34:35
6	Mikael K Eriksson	404	C++	2024-04-12 14:41:58
7	Jesús Pacheco Alonso	407	C++	2025-03-21 15:32:23
8	Kristinn Hrafn Daníelsson	416	C++	2024-11-12 15:31:10
9	Malte Dickson	423	C++	2023-11-23 18:21:12
10	Daniel Rasmussen	429	C++	2024-02-14 21:28:53

#	User	Length	Language	Date
1	Suka Isnaini	426	Go	2023-12-13 17:53:33
2	Norbert Voelker	780	Go	2023-11-28 15:26:25
3	Martin Stensgård	812	Go	2024-04-05 06:26:16
4	Thomas	1493	Go	2024-01-24 18:49:29

#	User	Length	Language	Date
1	Hidden user	383	Haskell	2023-11-28 13:03:40
2	Elias	673	Haskell	2023-11-24 14:00:32
3	Félix Martins	958	Haskell	2024-01-05 17:37:55
4	Steinar Simonnes	1112	Haskell	2025-01-01 20:18:39
5	Fritiof Rusck	1181	Haskell	2024-02-07 14:46:56
6	Brent Yorgey	8908	Haskell	2023-11-29 16:19:48

#	User	Length	Language	Date
1	Raymond Arrington	577	Java	2024-07-02 06:57:47
2	Oliver Starup	626	Java	2024-02-23 17:01:11
3	Pronab Malaker	686	Java	2025-11-22 00:12:08
4	Juthi Sarker Aka	686	Java	2025-11-22 01:11:06
5	Emil bks	719	Java	2024-02-23 16:45:31
6	Ronas Jacob Coban Olsen	739	Java	2024-02-23 18:49:12
7	Hidden user	740	Java	2024-02-23 17:06:46
8	Lisandro Marco Benetti	742	Java	2024-02-23 16:42:46
9	Hidden user	742	Java	2024-02-23 17:38:02
10	Md Abubakkar Shiddique Shovo	762	Java	2025-11-16 15:01:10

#	User	Length	Language	Date
1	Md. Johir Uddin	858	JavaScript (Node.js)	2025-11-20 12:22:53
2	Minh Trang Nguyen	915	JavaScript (Node.js)	2025-11-18 21:15:45

#	User	Length	Language	Date
1	Jimmy Gustafsson	136	JavaScript (SpiderMonkey)	2024-08-16 14:26:34
2	Bjørn Chr. Soltvedt	142	JavaScript (SpiderMonkey)	2023-11-28 08:56:22
3	Christian Pilegaard Cederquist	244	JavaScript (SpiderMonkey)	2023-11-30 05:42:09

#	User	Length	Language	Date
1	Timothy Gaede	486	Julia	2024-04-27 07:42:02

#	User	Length	Language	Date
1	Martijn Muijsers	888	Kotlin	2024-06-04 10:30:24

#	User	Length	Language	Date
1	Renate	525	PHP	2024-04-07 21:06:57

#	User	Length	Language	Date
1	Ahmed Chamseddine	129	Python 3	2024-08-16 08:47:29
2	Teikn Smith	140	Python 3	2024-01-09 18:37:48
3	Thibault Raffaillac	165	Python 3	2024-08-01 18:33:52
4	Simon Baeckelant	170	Python 3	2024-05-08 17:59:03
5	Lex Janssens	171	Python 3	2023-12-28 14:17:59
6	Peter Stauder	172	Python 3	2024-02-11 17:19:59
7	Rafael Kristoforus Yanto	173	Python 3	2025-02-21 15:15:29
8	Tan Yi Long	173	Python 3	2025-04-26 11:03:10
9	martin wennberg	177	Python 3	2023-11-26 09:44:02
10	Asher Diamond	179	Python 3	2025-11-20 08:49:49

#	User	Length	Language	Date
1	Thomas Feld	59	Ruby	2024-04-04 09:32:13
2	Miorel Palii	185	Ruby	2024-01-16 02:19:29

#	User	Length	Language	Date
1	David Rasch	635	Rust	2023-11-28 11:09:57
2	Bas Dirks	786	Rust	2023-12-31 13:56:05
3	Frank Endriss	1019	Rust	2024-06-17 09:08:02
4	Vincent Lagerros	17909	Rust	2025-02-16 19:08:23
5	Daniel Anker Hermansen	26535	Rust	2023-12-29 12:16:19

Solution running time distribution