Problem A
Social Distancing — Problem Statistics

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Submissions	2402
Accepted submissions	981
Submission ratio	40.84%
Authors	895
Full solves [?]	802
Full solve Ratio	89.61%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.00 s	C	2022-03-13 17:36:27
2	arda atci	0.00 s	C	2022-04-12 19:50:13
3	Hidden user	0.00 s	C	2022-07-31 11:10:17
4	Yeo Meng Han	0.00 s	C	2022-08-09 15:39:02
5	Eyleifur Bjarkason	0.00 s	C	2022-12-03 01:20:45
6	Rani DilipKumar Shiva Shankar	0.00 s	C	2024-01-09 08:31:34
7	Mirel Cosulschi	0.00 s	C	2024-09-26 13:26:44
8	Kumara Ivan Anuraga	0.00 s	C	2025-02-26 16:56:39

#	User	Runtime	Language	Date
1	Владимир Хилько	0.02 s	C#	2022-05-23 14:58:44
2	Eric Weiss	0.02 s	C#	2022-08-08 20:08:19
3	Mikael Fiala-Lundström	0.03 s	C#	2022-03-17 00:09:40
4	Yuwono Bangun Nagoro	0.03 s	C#	2022-03-24 03:37:05
5	Henrik Hallbert	0.03 s	C#	2022-04-04 14:36:03
6	Slimlix	0.03 s	C#	2022-04-11 10:25:32
7	Göran Andersson	0.03 s	C#	2022-05-14 17:53:27
8	Oswald Graae	0.04 s	C#	2025-10-13 17:59:27
9	Allan	0.05 s	C#	2025-09-25 10:51:48
10	Love	0.05 s	C#	2025-10-20 19:14:10

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.04 s	F#	2022-12-16 20:06:16

#	User	Runtime	Language	Date
1	Nicklas Østerberg	0.00 s	Go	2023-09-19 16:01:53
2	Norbert Voelker	0.08 s	Go	2022-03-19 19:40:12

#	User	Runtime	Language	Date
1	Ng Tek In	0.00 s	Haskell	2022-08-12 19:32:08
2	Brent Yorgey	0.01 s	Haskell	2022-03-14 03:57:53

#	User	Runtime	Language	Date
1	Steven Piotrowski	0.04 s	Java	2024-09-07 22:57:32
2	Mark Sturtevant	0.04 s	Java	2024-09-26 04:26:52
3	Bryan Yan	0.04 s	Java	2024-09-26 04:32:02
4	Axel Nilsson	0.04 s	Java	2024-11-03 16:05:18
5	Stela Palii	0.04 s	Java	2024-12-10 17:31:14
6	Sven Rönnbäck	0.04 s	Java	2025-01-17 22:44:15
7	Joar Eliasson	0.04 s	Java	2025-09-01 12:56:05
8	André Woxell	0.04 s	Java	2025-09-02 09:41:17
9	Crystal Sharpe	0.06 s	Java	2022-03-29 06:41:39
10	Alexander Giroux	0.06 s	Java	2022-03-31 01:11:06

#	User	Runtime	Language	Date
1	Joseph Winkie	0.04 s	JavaScript (Node.js)	2024-05-29 02:54:31

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-02-22 06:15:57
2	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2025-07-24 23:11:48
3	Bjørn Chr. Soltvedt	0.04 s	JavaScript (SpiderMonkey)	2022-03-17 19:10:05

#	User	Runtime	Language	Date
1	Timothy Gaede	0.60 s	Julia	2024-06-06 13:58:17

#	User	Runtime	Language	Date
1	Jacob Huebner	0.14 s	Kotlin	2022-04-05 21:16:07
2	Nicholas Johnson	0.15 s	Kotlin	2022-04-03 17:35:01
3	Adam Rankin	0.21 s	Kotlin	2023-08-25 23:55:34

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2023-03-22 15:42:21

#	User	Runtime	Language	Date
1	Renate	0.01 s	PHP	2022-07-26 23:09:11

#	User	Runtime	Language	Date
1	Hakan Kjellerstrand	0.02 s	Prolog	2023-03-15 08:32:03

#	User	Runtime	Language	Date
1	Hasan Kalzi	0.02 s	Python 2	2022-06-20 10:26:35
2	Yanmarshus Bachtiar	0.03 s	Python 2	2022-03-14 02:51:36
3	Johan Lyts	0.03 s	Python 2	2022-04-27 21:48:38

#	User	Runtime	Language	Date
1	Peter Stauder	0.04 s	Python 3	2022-06-05 08:44:34
2	Hasan Kalzi	0.04 s	Python 3	2022-06-20 10:26:17
3	Tam Nguyen Minh	0.04 s	Python 3	2022-07-21 20:10:40
4	Rajul Srivastava	0.04 s	Python 3	2022-07-23 07:48:11
5	Dung Doan	0.04 s	Python 3	2022-07-24 09:46:00
6	Petr	0.04 s	Python 3	2022-07-27 22:16:24
7	Edward Xue	0.04 s	Python 3	2022-07-29 21:37:53
8	Daryll Ko	0.04 s	Python 3	2022-08-02 09:27:55
9	Devin Lee Guan Seng	0.04 s	Python 3	2022-08-03 19:26:22
10	Mukerem Ali Nur	0.04 s	Python 3	2022-08-16 14:53:05

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	Ruby	2022-03-25 11:53:01
2	Thomas Feld	0.06 s	Ruby	2023-02-13 12:49:59

#	User	Runtime	Language	Date
1	Bas Dirks	0.00 s	Rust	2022-03-13 18:11:23
2	Jason Hooper	0.00 s	Rust	2022-03-13 23:19:56
3	Eric Pinter	0.00 s	Rust	2022-08-13 05:45:28

#	User	Length	Language	Date
1	arda atci	388	C	2022-04-12 19:50:13
2	Mirel Cosulschi	449	C	2025-02-22 23:22:54
3	Kumara Ivan Anuraga	935	C	2025-02-26 16:56:39
4	Rani DilipKumar Shiva Shankar	1364	C	2024-01-09 08:31:34
5	Yeo Meng Han	1450	C	2022-08-09 15:39:02
6	Hidden user	1491	C	2022-07-31 11:10:17
7	Bergur Snorrason	1720	C	2022-03-13 17:36:27
8	Eyleifur Bjarkason	7486	C	2022-12-03 01:20:45

#	User	Length	Language	Date
1	Henrik Hallbert	449	C#	2022-04-04 14:36:03
2	Neo Ferrari	591	C#	2026-01-20 15:15:50
3	Allan	710	C#	2025-09-25 10:51:48
4	Göran Andersson	721	C#	2022-05-14 17:53:27
5	Владимир Хилько	929	C#	2022-05-23 14:58:44
6	Mikael Fiala-Lundström	1404	C#	2022-03-17 00:09:40
7	Yuwono Bangun Nagoro	1407	C#	2022-03-24 03:37:05
8	Eric Weiss	1455	C#	2022-08-08 20:08:19
9	Slimlix	2319	C#	2022-04-11 10:25:32
10	Love	3532	C#	2025-10-20 19:14:10

#	User	Length	Language	Date
1	Frans Meulenbroeks	131	C++	2024-11-08 18:44:54
2	Chenghao Wang	242	C++	2023-02-16 04:45:09
3	Phillo Tunru	263	C++	2023-02-16 04:39:47
4	Mohsen Mahroos	285	C++	2023-04-03 02:19:55
5	David Han	299	C++	2024-09-07 22:23:56
6	Hidden user	306	C++	2022-08-09 15:23:52
7	Leslie Yip	308	C++	2022-08-24 08:47:12
8	Coza Ada Ioana	309	C++	2022-03-24 17:01:26
9	Robert Lee	311	C++	2022-07-15 01:46:20
10	FranciscDimitrieCarolParaschiv Birt	313	C++	2022-03-24 10:54:23

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	736	F#	2022-12-16 20:06:16

#	User	Length	Language	Date
1	Nicklas Østerberg	404	Go	2023-09-19 16:01:53
2	Norbert Voelker	658	Go	2022-03-19 19:40:12

#	User	Length	Language	Date
1	Brent Yorgey	288	Haskell	2022-03-14 03:57:53
2	Ng Tek In	538	Haskell	2022-08-12 19:32:29

#	User	Length	Language	Date
1	Andreas Guldborg Hansen	555	Java	2022-03-28 21:43:50
2	Doug Goodman	573	Java	2022-03-14 16:42:53
3	Freek van Keulen	583	Java	2022-04-13 14:10:55
4	Hidden user	636	Java	2024-09-09 13:06:24
5	Jonas Moll	640	Java	2022-08-17 19:20:30
6	Hidden user	640	Java	2025-11-23 14:25:18
7	Daniel Carlson	662	Java	2022-11-14 17:13:33
8	Andrew Mou	696	Java	2023-02-18 18:20:46
9	USaskAdvanced1	698	Java	2023-02-25 18:05:25
10	Levi Pinkert	710	Java	2023-02-16 21:42:51

#	User	Length	Language	Date
1	Joseph Winkie	2921	JavaScript (Node.js)	2024-05-29 02:54:31

#	User	Length	Language	Date
1	Jimmy Gustafsson	127	JavaScript (SpiderMonkey)	2025-07-24 23:11:48
2	Christian Pilegaard Cederquist	331	JavaScript (SpiderMonkey)	2023-02-22 06:15:57
3	Bjørn Chr. Soltvedt	366	JavaScript (SpiderMonkey)	2022-03-17 19:10:05

#	User	Length	Language	Date
1	Timothy Gaede	444	Julia	2024-06-06 13:58:17

#	User	Length	Language	Date
1	Jacob Huebner	401	Kotlin	2022-04-05 21:16:07
2	Adam Rankin	407	Kotlin	2023-08-25 23:55:34
3	Nicholas Johnson	744	Kotlin	2022-04-03 17:35:01

#	User	Length	Language	Date
1	Ingemar Ragnemalm	776	Pascal	2023-03-22 15:42:21

#	User	Length	Language	Date
1	Renate	400	PHP	2022-07-26 23:09:11

#	User	Length	Language	Date
1	Hakan Kjellerstrand	139	Prolog	2023-03-15 08:54:58

#	User	Length	Language	Date
1	Johan Lyts	260	Python 2	2022-04-27 14:58:34
2	Yanmarshus Bachtiar	408	Python 2	2022-03-14 02:51:36
3	Hasan Kalzi	519	Python 2	2022-04-12 10:19:06

#	User	Length	Language	Date
1	André Woxell	93	Python 3	2025-09-06 01:17:58
2	Clement Oh	96	Python 3	2023-07-03 07:29:12
3	Benjamin Z White	99	Python 3	2023-05-07 00:14:33
4	Joar Eliasson	101	Python 3	2025-09-06 00:25:40
5	ACMCSU	110	Python 3	2024-12-08 04:01:50
6	Collin Simpson	110	Python 3	2024-12-08 04:06:00
7	Thomas Feld	120	Python 3	2022-08-26 11:01:02
8	Hakan Kjellerstrand	129	Python 3	2023-03-15 08:48:58
9	Hu Yijie	134	Python 3	2022-09-22 16:26:10
10	Lex Janssens	134	Python 3	2023-06-29 08:49:19

#	User	Length	Language	Date
1	Thomas Feld	60	Ruby	2023-02-13 12:55:04
2	Hidden user	110	Ruby	2022-03-25 11:53:01

#	User	Length	Language	Date
1	Bas Dirks	772	Rust	2022-03-13 18:11:23
2	Eric Pinter	1195	Rust	2022-08-13 05:45:28
3	Jason Hooper	2249	Rust	2022-03-13 23:19:56

Solution running time distribution