Problem A
Attendance — Problem Statistics

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Submissions	2304
Accepted submissions	897
Submission ratio	38.93%
Authors	848
Full solves [?]	774
Full solve Ratio	91.27%

#	User	Runtime	Language	Date
1	Sebastian Banert	0.00 s	Ada	2024-10-19 20:58:29

#	User	Runtime	Language	Date
1	Danny Robinson	0.01 s	Bash	2023-11-18 09:53:10
2	D A K	0.01 s	Bash	2025-04-24 16:05:01

#	User	Runtime	Language	Date
1	Gregory Sinclair	0.04 s	C#	2023-11-14 20:41:39
2	Sano Gharzani	0.04 s	C#	2023-12-27 14:33:08
3	Esty Crow	0.04 s	C#	2024-01-20 18:46:24
4	Anthony Ye	0.04 s	C#	2024-01-21 20:26:20
5	traxex	0.04 s	C#	2024-05-26 15:51:41
6	Michael Damsgaard	0.04 s	C#	2024-12-23 15:52:11
7	Umar Rasyid	0.04 s	C#	2025-01-25 05:56:07
8	Erik Algesten	0.04 s	C#	2025-08-06 11:29:20

#	User	Runtime	Language	Date
1	Oisín Mac Fhearaí	0.00 s	Crystal	2024-08-24 20:58:49

#	User	Runtime	Language	Date
1	Amalie Baert	0.06 s	F#	2024-10-28 01:49:14

#	User	Runtime	Language	Date
1	Bjørn Dons	0.00 s	Go	2023-11-07 20:27:56
2	Norbert Voelker	0.00 s	Go	2023-11-09 12:27:14

#	User	Runtime	Language	Date
1	Brent Yorgey	0.00 s	Haskell	2023-11-04 20:57:35
2	Hidden user	0.00 s	Haskell	2023-11-05 23:39:56
3	Josip Smolcic	0.00 s	Haskell	2023-11-06 22:42:52
4	Charley Sheaffer	0.00 s	Haskell	2023-11-16 19:24:57
5	Ng Tek In	0.00 s	Haskell	2024-01-17 18:30:21
6	Steinar Simonnes	0.00 s	Haskell	2024-02-04 18:03:00
7	Rudy Matela	0.00 s	Haskell	2024-04-23 16:48:40
8	Sebastian Banert	0.00 s	Haskell	2024-09-26 16:00:47
9	Jan Hrček	0.00 s	Haskell	2024-12-16 14:42:59
10	Shinji Koshida	0.00 s	Haskell	2025-03-12 09:36:45

#	User	Runtime	Language	Date
1	Achim Ahlers	0.04 s	Java	2024-10-06 17:39:36
2	Sriniketh Vangaru	0.04 s	Java	2024-11-02 18:05:15
3	Jerry Chen	0.04 s	Java	2024-11-09 22:21:17
4	Stela Palii	0.04 s	Java	2024-12-02 03:23:06
5	Guangyi Zhou	0.04 s	Java	2025-02-03 11:01:06
6	Aruneem Bhowmick	0.04 s	Java	2025-07-20 06:10:55
7	Ku Brian	0.05 s	Java	2024-05-11 15:42:37
8	Raymond Arrington	0.05 s	Java	2024-06-30 04:24:27
9	Daniel Gutierrez Duarte	0.05 s	Java	2025-05-15 15:58:49
10	Ben Cobb	0.06 s	Java	2023-11-07 06:06:20

#	User	Runtime	Language	Date
1	Jannik99	0.05 s	JavaScript (Node.js)	2023-11-21 16:01:30
2	Hidden user	0.05 s	JavaScript (Node.js)	2025-01-18 04:49:03

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.02 s	JavaScript (SpiderMonkey)	2023-11-05 01:41:02
2	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-11-05 18:43:47
3	Zach Tschetter	0.02 s	JavaScript (SpiderMonkey)	2023-11-19 23:54:05
4	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-07-21 14:00:19
5	Siddharth Reddy	0.02 s	JavaScript (SpiderMonkey)	2025-01-29 17:15:50

#	User	Runtime	Language	Date
1	Timothy Gaede	0.46 s	Julia	2024-03-27 05:33:47

#	User	Runtime	Language	Date
1	Adam Rankin	0.18 s	Kotlin	2023-11-12 19:48:53
2	Martijn Muijsers	0.18 s	Kotlin	2024-05-31 20:06:31
3	Zaw Myat	0.21 s	Kotlin	2024-01-06 00:07:22

#	User	Runtime	Language	Date
1	Renate	0.01 s	PHP	2023-11-15 00:30:26

#	User	Runtime	Language	Date
1	Johan Lyts	0.03 s	Python 2	2023-12-01 14:50:39
2	Ekta Mali	0.07 s	Python 2	2025-06-01 08:39:58

#	User	Runtime	Language	Date
1	Kadriye Yildiz	0.04 s	Python 3	2024-08-29 20:30:19
2	khalisa zahra	0.04 s	Python 3	2024-09-01 11:37:45
3	Trevor	0.04 s	Python 3	2024-09-03 00:57:52
4	Lumi Lysdal	0.04 s	Python 3	2024-09-04 22:05:00
5	Hidden user	0.04 s	Python 3	2024-09-08 20:36:07
6	João Manoel Feck	0.04 s	Python 3	2024-09-09 13:24:20
7	William James Eves	0.04 s	Python 3	2024-09-11 23:51:12
8	Hidden user	0.04 s	Python 3	2024-09-14 06:14:54
9	James Bryan Francisco	0.04 s	Python 3	2024-09-14 06:33:32
10	Rafael Sheen Acuna	0.04 s	Python 3	2024-09-14 12:38:12

#	User	Runtime	Language	Date
1	Thomas Feld	0.06 s	Ruby	2023-11-07 13:50:28
2	Miorel Palii	0.07 s	Ruby	2024-11-25 01:39:14

#	User	Runtime	Language	Date
1	David Rasch	0.00 s	Rust	2023-11-15 10:04:58
2	Bas Dirks	0.00 s	Rust	2023-12-25 15:49:31
3	Frank Endriss	0.00 s	Rust	2024-06-02 16:15:48
4	Daniel Anker Hermansen	0.00 s	Rust	2024-08-12 12:38:53
5	Pankajkumar Patro	0.00 s	Rust	2024-09-16 16:58:30
6	Isak Jägberg	0.00 s	Rust	2024-10-23 13:00:55
7	Vincent Lagerros	0.00 s	Rust	2024-11-22 18:23:19
8	Egor Kulikov	0.00 s	Rust	2025-01-15 13:28:58
9	Gabriella Gloria	0.00 s	Rust	2025-04-22 08:34:25

#	User	Runtime	Language	Date
1	Krzys Hejno	0.00 s	Swift	2025-02-10 19:54:01

#	User	Length	Language	Date
1	Sebastian Banert	843	Ada	2024-10-19 20:58:29

#	User	Length	Language	Date
1	Danny Robinson	97	Bash	2023-11-18 09:53:10
2	D A K	665	Bash	2025-04-24 16:08:21

#	User	Length	Language	Date
1	Philipp Hergenhahn	322	C	2024-12-31 20:37:30
2	arda atci	457	C	2024-09-29 23:32:44
3	Mirel Cosulschi	489	C	2025-03-23 17:24:59
4	KANISHKA N	522	C	2025-04-11 18:23:29
5	KARTHIKAA K	532	C	2025-03-31 09:19:42
6	ROOPIKA S	551	C	2025-04-15 18:44:31
7	Mikael K Eriksson	591	C	2024-02-21 08:56:18
8	Hidden user	632	C	2025-03-28 07:21:24
9	Mohamed ali	633	C	2025-01-09 12:05:57
10	HARITHA S R	669	C	2025-03-30 15:05:12

#	User	Length	Language	Date
1	Gregory Sinclair	274	C#	2023-11-14 20:41:39
2	traxex	364	C#	2024-05-26 15:51:41
3	Michael Damsgaard	594	C#	2024-12-23 15:52:11
4	Esty Crow	598	C#	2024-01-20 18:46:24
5	Anthony Ye	644	C#	2024-01-21 20:26:20
6	Umar Rasyid	1127	C#	2025-01-25 05:56:07
7	Erik Algesten	1221	C#	2025-08-06 11:29:20
8	Sano Gharzani	1479	C#	2023-12-27 14:33:08

#	User	Length	Language	Date
1	Taylor Rodríguez	309	C++	2025-01-18 20:24:30
2	Jesús Pacheco Alonso	360	C++	2024-01-24 17:11:40
3	7sixPAUL	373	C++	2023-11-12 15:17:17
4	Dmytro Bilotserkovets	373	C++	2025-03-28 19:51:52
5	Grae Yeandle	390	C++	2023-11-16 15:46:53
6	Mic Rey	398	C++	2025-10-30 03:21:36
7	Rain Zimin Yang	399	C++	2024-02-10 20:48:56
8	Md. Tuser Sheikh	401	C++	2024-01-11 11:16:14
9	Andrew Lyem	411	C++	2024-03-17 19:38:39
10	Ale Demian	419	C++	2023-11-12 15:16:26

#	User	Length	Language	Date
1	Oisín Mac Fhearaí	160	Crystal	2024-08-24 20:58:49

#	User	Length	Language	Date
1	Amalie Baert	351	F#	2024-10-28 01:49:14

#	User	Length	Language	Date
1	Norbert Voelker	493	Go	2023-11-09 12:27:14
2	Bjørn Dons	825	Go	2023-11-07 20:27:56

#	User	Length	Language	Date
1	Rudy Matela	104	Haskell	2024-04-23 16:53:24
2	Jan Hrček	120	Haskell	2024-12-16 14:42:59
3	Sebastian Banert	197	Haskell	2024-09-26 16:00:47
4	Charley Sheaffer	282	Haskell	2023-11-16 19:24:57
5	Josip Smolcic	329	Haskell	2023-11-06 22:42:52
6	Steinar Simonnes	341	Haskell	2024-02-04 18:03:00
7	Brent Yorgey	344	Haskell	2023-11-04 20:57:35
8	Hidden user	345	Haskell	2023-11-05 23:39:56
9	Shinji Koshida	359	Haskell	2025-03-12 09:36:45
10	vagabundus	483	Haskell	2024-05-01 19:22:07

#	User	Length	Language	Date
1	Apple T	550	Java	2025-05-13 14:28:59
2	Christian Allen	596	Java	2025-04-04 14:08:32
3	Alejandro M	599	Java	2025-03-20 01:43:05
4	Tiffani Slutsky	674	Java	2025-03-21 01:50:55
5	Daniel Koshy	691	Java	2025-05-13 14:25:34
6	Juan Dominguez	701	Java	2025-05-09 18:39:05
7	Ayooluwa Awonusonu	702	Java	2025-04-12 19:35:21
8	Petra Alawar	704	Java	2025-10-30 20:40:17
9	Macie Tadaiyon	708	Java	2025-04-29 05:47:26
10	Raymond Arrington	712	Java	2024-06-30 04:24:27

#	User	Length	Language	Date
1	Hidden user	769	JavaScript (Node.js)	2025-01-18 04:49:03
2	Jannik99	1007	JavaScript (Node.js)	2023-11-21 16:01:30

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	140	JavaScript (SpiderMonkey)	2023-11-05 18:43:47
2	Bjørn Chr. Soltvedt	166	JavaScript (SpiderMonkey)	2023-11-05 01:47:00
3	Zach Tschetter	191	JavaScript (SpiderMonkey)	2023-11-19 23:54:05
4	Jimmy Gustafsson	203	JavaScript (SpiderMonkey)	2024-07-21 14:00:19
5	Siddharth Reddy	709	JavaScript (SpiderMonkey)	2025-01-29 17:15:50

#	User	Length	Language	Date
1	Timothy Gaede	978	Julia	2024-03-27 05:33:47

#	User	Length	Language	Date
1	Adam Rankin	549	Kotlin	2023-11-12 19:48:53
2	Zaw Myat	704	Kotlin	2024-01-06 00:07:22
3	Martijn Muijsers	838	Kotlin	2024-05-31 20:06:31

#	User	Length	Language	Date
1	Renate	413	PHP	2023-11-15 00:30:26

#	User	Length	Language	Date
1	Johan Lyts	289	Python 2	2023-12-01 14:50:39
2	Ekta Mali	490	Python 2	2025-06-01 08:39:58

#	User	Length	Language	Date
1	Ahmed Chamseddine	132	Python 3	2024-07-22 11:14:38
2	Farzam Abrishami	160	Python 3	2025-09-27 16:19:09
3	Thibault Raffaillac	162	Python 3	2024-07-27 22:03:39
4	Rafael Kristoforus Yanto	164	Python 3	2025-02-23 13:47:32
5	Tai Tze Kin	168	Python 3	2024-05-05 13:44:58
6	Alexandre Douard	171	Python 3	2023-12-20 21:45:13
7	Caeden Whitaker	172	Python 3	2024-01-09 23:36:20
8	Nicholas Russell Saerang	173	Python 3	2023-11-10 11:36:34
9	Daniel Bogorad	176	Python 3	2025-08-20 17:40:22
10	Sacha De Mulder	182	Python 3	2024-11-24 21:54:52

#	User	Length	Language	Date
1	Thomas Feld	61	Ruby	2023-11-07 13:50:28
2	Miorel Palii	171	Ruby	2024-11-25 01:39:14

#	User	Length	Language	Date
1	Vincent Lagerros	346	Rust	2024-11-22 18:23:52
2	David Rasch	571	Rust	2023-11-15 10:04:58
3	Pankajkumar Patro	686	Rust	2024-09-16 16:58:30
4	Bas Dirks	796	Rust	2023-12-25 15:49:31
5	Isak Jägberg	947	Rust	2024-10-23 13:00:55
6	Frank Endriss	983	Rust	2024-06-02 16:15:48
7	Gabriella Gloria	1449	Rust	2025-04-22 08:34:25
8	Egor Kulikov	20414	Rust	2025-01-15 13:28:58
9	Daniel Anker Hermansen	27509	Rust	2024-08-12 12:38:53

#	User	Length	Language	Date
1	Krzys Hejno	817	Swift	2025-02-10 19:54:01

Solution running time distribution