Problem A
Keys, Phone, Wallet — Problem Statistics

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Submissions	5792
Accepted submissions	2325
Submission ratio	40.14%
Authors	2129
Full solves [?]	2031
Full solve Ratio	95.40%

#	User	Runtime	Language	Date
1	Ignacio Castellano Vega	0.00 s	Ada	2024-07-05 17:07:30

#	User	Runtime	Language	Date
1	Edson Alves	0.01 s	APL	2025-01-06 18:53:49

#	User	Runtime	Language	Date
1	Andrew Barth	0.01 s	Bash	2024-09-27 23:32:57
2	Chenzhang Hu	0.07 s	Bash	2024-03-29 16:52:30

#	User	Runtime	Language	Date
1	Sano Gharzani	0.04 s	C#	2024-03-20 11:25:19
2	Dennis Stegnell	0.04 s	C#	2024-03-20 12:54:54
3	Benjamin Bilbeau	0.04 s	C#	2024-03-20 18:39:48
4	Jan Matthiessen	0.04 s	C#	2024-03-24 13:44:33
5	traxex	0.04 s	C#	2024-03-25 12:37:16
6	Vlad Vaida	0.04 s	C#	2024-04-17 21:34:31
7	Maykal Droshev	0.04 s	C#	2024-04-21 15:17:54
8	Գոռ Բաղդասարյան	0.04 s	C#	2024-05-06 13:31:33
9	Mikael Fiala-Lundström	0.04 s	C#	2024-05-31 21:56:32
10	Esty Crow	0.04 s	C#	2024-06-07 14:55:07

#	User	Runtime	Language	Date
1	Jacky Blois	0.00 s	COBOL	2024-06-06 11:02:21

#	User	Runtime	Language	Date
1	yraten	0.01 s	Common Lisp	2024-04-10 05:11:09
2	Norvell Spearman	0.03 s	Common Lisp	2024-12-18 23:02:08

#	User	Runtime	Language	Date
1	Stefan Holm	0.01 s	Dart	2024-06-22 23:34:01

#	User	Runtime	Language	Date
1	Mikael Fangel	0.54 s	Elixir	2024-09-23 23:38:47

#	User	Runtime	Language	Date
1	Emil Boesgaard Nørbjerg	0.06 s	F#	2024-04-05 16:28:51
2	Hidden user	0.06 s	F#	2024-12-10 06:08:28
3	Stefan Schmiedl	0.08 s	F#	2024-08-23 02:12:47

#	User	Runtime	Language	Date
1	Norbert Voelker	0.00 s	Go	2024-03-18 12:21:37
2	Jimmy Nejtron	0.00 s	Go	2024-04-15 17:10:01
3	Abby Lorber	0.00 s	Go	2024-05-08 19:40:39
4	Martin Stensgård	0.00 s	Go	2024-08-11 00:38:20
5	Chris Vilches	0.00 s	Go	2024-08-16 19:08:13
6	Nikolaj Alsøe	0.00 s	Go	2024-09-07 20:45:21
7	Nienna Ackerman	0.00 s	Go	2024-10-03 22:21:30
8	Tyler D Kelley	0.00 s	Go	2025-02-10 18:47:54

#	User	Runtime	Language	Date
1	Simon Dohn	0.04 s	Java	2024-08-08 16:22:36
2	Jordan Cripe	0.04 s	Java	2024-09-07 22:42:05
3	Stela Palii	0.04 s	Java	2024-11-28 05:34:39
4	Guangyi Zhou	0.04 s	Java	2024-12-15 15:24:23
5	Ranjith M	0.04 s	Java	2025-01-07 20:22:31
6	Einar Þór Ívarsson	0.04 s	Java	2025-03-10 12:55:24
7	Luis Varona	0.04 s	Java	2025-03-13 00:48:05
8	Cambrien Malenko	0.04 s	Java	2025-03-15 17:32:49
9	Alex Golub	0.04 s	Java	2025-03-25 09:10:51
10	Markus Bao	0.04 s	Java	2025-08-01 06:32:52

#	User	Runtime	Language	Date
1	Hidden user	0.04 s	JavaScript (Node.js)	2024-09-27 03:37:41
2	Erlend Raa Vågset	0.04 s	JavaScript (Node.js)	2025-10-21 12:56:42

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.02 s	JavaScript (SpiderMonkey)	2024-03-17 16:25:42
2	Nick Cooper	0.02 s	JavaScript (SpiderMonkey)	2024-03-18 04:47:36
3	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2024-03-18 09:42:22
4	Carl Pittenger	0.02 s	JavaScript (SpiderMonkey)	2024-03-18 20:57:35
5	Zach Tschetter	0.02 s	JavaScript (SpiderMonkey)	2024-03-24 23:12:04
6	Hidden user	0.02 s	JavaScript (SpiderMonkey)	2024-03-27 19:25:51
7	Evan Magill	0.02 s	JavaScript (SpiderMonkey)	2024-04-02 22:40:53
8	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-05-30 12:03:28
9	Tanmay Sharma	0.02 s	JavaScript (SpiderMonkey)	2024-12-11 18:52:33
10	Quoc Anh Khoa Nguyen	0.02 s	JavaScript (SpiderMonkey)	2025-01-24 20:43:18

#	User	Runtime	Language	Date
1	Alexandre Charland	0.30 s	Julia	2024-03-18 02:49:34
2	Timothy Gaede	0.52 s	Julia	2024-03-18 06:31:10
3	Danny Robinson	0.67 s	Julia	2024-08-27 00:40:56

#	User	Runtime	Language	Date
1	Zaw Myat	0.18 s	Kotlin	2024-03-19 11:27:22
2	Emil Wihlander	0.18 s	Kotlin	2024-07-16 00:41:19
3	ANDREY FELIPE PINTO URIBE	0.20 s	Kotlin	2024-08-25 06:20:19
4	Johnny Console	0.20 s	Kotlin	2024-11-04 17:27:24
5	Aditya Bhagavatula	0.21 s	Kotlin	2024-03-21 03:23:26
6	Adam Rankin	0.21 s	Kotlin	2024-05-05 03:55:42
7	Martijn Muijsers	0.21 s	Kotlin	2024-05-27 14:45:48
8	Magnus Tønnessen	0.22 s	Kotlin	2024-08-01 22:37:11
9	Troy Warmboe	0.23 s	Kotlin	2024-04-05 23:11:11
10	Chris Johnson	0.29 s	Kotlin	2025-10-28 21:29:09

#	User	Runtime	Language	Date
1	Jacky Blois	0.00 s	Lua	2024-06-06 10:52:08
2	Adriel Javen Castro	0.00 s	Lua	2025-02-11 21:23:19

#	User	Runtime	Language	Date
1	Artemis Ngoh	0.00 s	OCaml	2024-04-03 18:10:49
2	Sebastian Banert	0.00 s	OCaml	2024-07-19 15:01:13
3	Hidden user	0.00 s	OCaml	2024-09-19 22:17:00

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.09 s	Octave	2024-03-18 19:21:43

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Odin	2025-04-24 00:13:18

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2024-03-25 06:59:36
2	David Connolly	0.00 s	Pascal	2024-10-04 15:29:21

#	User	Runtime	Language	Date
1	Saito Ta	0.00 s	Perl	2024-03-27 10:18:20

#	User	Runtime	Language	Date
1	Renate	0.01 s	PHP	2024-04-07 17:01:42

#	User	Runtime	Language	Date
1	Yanmarshus Bachtiar	0.03 s	Python 2	2024-03-19 06:32:16
2	Johan Lyts	0.03 s	Python 2	2024-03-26 21:24:19
3	KALAJAYANTHI M	0.07 s	Python 2	2025-09-26 11:20:48

#	User	Runtime	Language	Date
1	Gaston Navarro	0.04 s	Python 3	2024-08-28 06:33:26
2	Hidden user	0.04 s	Python 3	2024-08-28 15:07:07
3	Neil Dunne	0.04 s	Python 3	2024-08-28 21:31:39
4	João Manoel Feck	0.04 s	Python 3	2024-08-29 14:23:25
5	ZHANG ZIQI	0.04 s	Python 3	2024-08-29 14:35:20
6	Jodie L	0.04 s	Python 3	2024-08-29 14:37:53
7	ceilingtile	0.04 s	Python 3	2024-08-30 06:07:40
8	vincent exelcio	0.04 s	Python 3	2024-08-30 07:28:28
9	Dennis Laue	0.04 s	Python 3	2024-08-30 17:17:18
10	Kuan Jun Heng	0.04 s	Python 3	2024-08-31 06:53:13

#	User	Runtime	Language	Date
1	Frederik Petersen	0.06 s	Ruby	2024-03-26 20:37:41
2	Russell Ng	0.06 s	Ruby	2024-08-16 16:50:21
3	Miorel Palii	0.06 s	Ruby	2024-11-09 07:54:37
4	Michael Lineweaver	0.06 s	Ruby	2025-09-28 20:47:43
5	Eugen Neagoe	0.06 s	Ruby	2026-01-28 22:20:09
6	Clement Oh	0.07 s	Ruby	2024-03-24 13:47:10
7	Thomas Feld	0.07 s	Ruby	2024-04-02 12:49:32
8	Chenzhang Hu	0.12 s	Ruby	2025-09-22 17:42:56

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Swift	2024-03-17 14:52:11
2	AZm87	0.00 s	Swift	2024-04-08 19:03:15
3	Jevania	0.00 s	Swift	2024-04-28 16:35:27

#	User	Runtime	Language	Date
1	Grettir Heimisson	0.00 s	Zig	2025-10-29 14:55:48

#	User	Length	Language	Date
1	Ignacio Castellano Vega	732	Ada	2024-07-05 17:07:30

#	User	Length	Language	Date
1	Edson Alves	182	APL	2025-01-06 18:53:49

#	User	Length	Language	Date
1	Chenzhang Hu	61	Bash	2025-09-13 18:39:34
2	Andrew Barth	394	Bash	2024-09-27 23:32:57

#	User	Length	Language	Date
1	Martin Blom	231	C	2024-06-05 17:41:23
2	Oliver Noreklev	315	C	2025-09-30 09:20:48
3	HARIPRASATH S	494	C	2025-05-08 17:52:01
4	Allan Nouri	521	C	2024-03-17 19:17:18
5	Michelle Arvidsson	569	C	2024-12-27 22:47:57
6	Filip Kronander	571	C	2025-10-22 13:53:06
7	Hidden user	576	C	2024-12-01 16:45:33
8	Eemeli Kyröläinen	580	C	2024-04-25 03:25:45
9	Hidden user	585	C	2025-03-30 10:39:15
10	Hidden user	590	C	2025-03-26 02:58:29

#	User	Length	Language	Date
1	RecompiledBirds	271	C#	2025-08-31 03:18:16
2	Mikael Fiala-Lundström	292	C#	2024-05-31 22:18:23
3	traxex	386	C#	2024-03-25 12:37:16
4	Pontus Magnusson	431	C#	2024-03-26 22:25:13
5	Esty Crow	452	C#	2024-06-07 19:52:31
6	Anthony Ye	468	C#	2025-04-04 19:39:10
7	Martin Jentoft	663	C#	2024-12-27 10:30:34
8	Hidden user	676	C#	2024-07-21 13:35:30
9	Vlad Vaida	680	C#	2024-04-17 21:34:31
10	Michael Damsgaard	719	C#	2024-11-07 22:40:06

#	User	Length	Language	Date
1	Carl Pittenger	231	C++	2024-03-18 22:38:49
2	Evan Michael Bailey	265	C++	2024-05-30 06:22:08
3	Zac Friggstad	371	C++	2024-03-17 19:04:29
4	Nicholas Foo Chuan Le	373	C++	2024-05-22 09:56:10
5	Benjamin Braüner	381	C++	2024-04-08 11:39:11
6	Jason Liu	383	C++	2024-04-06 03:42:05
7	Brandon Lau	386	C++	2025-01-24 05:19:21
8	Lew Choon Hean	392	C++	2024-12-28 05:03:21
9	ALEKSANDER WILLIAM	394	C++	2024-03-31 15:00:09
10	Henrik Josefsson	397	C++	2024-05-10 09:10:15

#	User	Length	Language	Date
1	Jacky Blois	1000	COBOL	2024-06-06 11:02:21

#	User	Length	Language	Date
1	yraten	299	Common Lisp	2024-04-10 05:11:09
2	Norvell Spearman	657	Common Lisp	2024-12-18 23:02:08

#	User	Length	Language	Date
1	Stefan Holm	872	Dart	2024-06-22 23:34:01

#	User	Length	Language	Date
1	Mikael Fangel	416	Elixir	2024-09-23 23:38:47

#	User	Length	Language	Date
1	Stefan Schmiedl	523	F#	2024-08-23 02:12:47
2	Hidden user	532	F#	2024-12-10 06:08:28
3	Emil Boesgaard Nørbjerg	2144	F#	2024-04-05 16:28:51

#	User	Length	Language	Date
1	Jimmy Nejtron	420	Go	2024-04-15 17:10:01
2	Norbert Voelker	462	Go	2024-03-18 12:21:37
3	Chris Vilches	497	Go	2024-08-16 19:08:13
4	Nienna Ackerman	553	Go	2024-10-03 22:21:30
5	Martin Stensgård	619	Go	2024-08-11 00:38:20
6	Nikolaj Alsøe	641	Go	2024-09-07 20:45:21
7	Abby Lorber	646	Go	2024-05-08 19:40:39
8	Tyler D Kelley	707	Go	2025-02-10 18:47:54

#	User	Length	Language	Date
1	Rudy Matela	94	Haskell	2024-03-17 15:44:27
2	Matthew Johnson	100	Haskell	2024-05-03 04:49:20
3	Steinar Simonnes	215	Haskell	2024-03-19 11:29:24
4	Daniel Cabral	226	Haskell	2024-06-19 09:22:06
5	Sebastian Banert	229	Haskell	2024-06-07 15:32:43
6	Øyvind Almli	243	Haskell	2024-04-28 15:26:53
7	Timur Khazhiev	244	Haskell	2024-12-31 09:08:23
8	Christopher Whelan	261	Haskell	2025-01-01 03:35:04
9	Ramesh baskaran	281	Haskell	2024-10-08 18:22:11
10	Rani Eyðfinnsson Í Bø	290	Haskell	2024-04-05 16:53:29

#	User	Length	Language	Date
1	John Hershey	385	Java	2024-04-09 19:45:14
2	Steven Arycena Fatich	514	Java	2025-02-27 04:11:06
3	Hidden user	524	Java	2024-06-22 00:48:12
4	Lucas “Cortes” Cortes	560	Java	2025-03-12 00:21:17
5	Zayan Sharief	564	Java	2025-03-13 02:36:02
6	Apple T	566	Java	2025-03-12 02:14:57
7	Thomas King	569	Java	2024-06-13 18:26:30
8	Oliver Brinch	597	Java	2024-04-05 16:57:45
9	Trace Salinas	602	Java	2025-12-15 19:13:25
10	Raymond Arrington	606	Java	2024-06-07 07:26:34

#	User	Length	Language	Date
1	Erlend Raa Vågset	271	JavaScript (Node.js)	2025-10-21 12:56:42
2	Hidden user	939	JavaScript (Node.js)	2024-09-27 03:37:41

#	User	Length	Language	Date
1	Nick Cooper	89	JavaScript (SpiderMonkey)	2024-03-18 21:41:50
2	Christian Pilegaard Cederquist	101	JavaScript (SpiderMonkey)	2024-03-18 09:42:22
3	Jimmy Gustafsson	137	JavaScript (SpiderMonkey)	2024-05-30 12:03:28
4	Carl Pittenger	139	JavaScript (SpiderMonkey)	2024-03-18 20:57:35
5	Hidden user	205	JavaScript (SpiderMonkey)	2024-03-27 19:25:51
6	Ben Armstrong	206	JavaScript (SpiderMonkey)	2025-07-17 00:40:53
7	Bjørn Chr. Soltvedt	245	JavaScript (SpiderMonkey)	2024-03-17 16:25:42
8	Quoc Anh Khoa Nguyen	252	JavaScript (SpiderMonkey)	2025-01-24 20:43:18
9	Zach Tschetter	255	JavaScript (SpiderMonkey)	2025-01-24 20:41:45
10	Amina Pandey	256	JavaScript (SpiderMonkey)	2025-01-29 21:34:50

#	User	Length	Language	Date
1	Danny Robinson	77	Julia	2024-08-27 00:40:56
2	Alexandre Charland	98	Julia	2024-03-18 20:55:26
3	Timothy Gaede	679	Julia	2024-03-18 06:19:59

#	User	Length	Language	Date
1	Magnus Tønnessen	187	Kotlin	2024-08-01 22:37:11
2	Adam Rankin	242	Kotlin	2024-05-05 03:55:42
3	Troy Warmboe	307	Kotlin	2024-04-05 23:11:11
4	Chris Johnson	389	Kotlin	2025-10-28 21:29:09
5	Aditya Bhagavatula	425	Kotlin	2024-03-21 03:23:26
6	Zaw Myat	465	Kotlin	2024-03-19 11:27:22
7	Johnny Console	471	Kotlin	2024-11-04 17:27:24
8	Martijn Muijsers	584	Kotlin	2024-05-27 14:45:48
9	Emil Wihlander	584	Kotlin	2024-07-16 00:41:19
10	ANDREY FELIPE PINTO URIBE	930	Kotlin	2024-08-25 06:20:19

#	User	Length	Language	Date
1	Jacky Blois	364	Lua	2024-06-06 10:52:08
2	Adriel Javen Castro	654	Lua	2025-02-11 21:23:19

#	User	Length	Language	Date
1	Hidden user	479	OCaml	2024-09-19 22:17:00
2	Sebastian Banert	555	OCaml	2024-07-19 15:01:13
3	Artemis Ngoh	664	OCaml	2024-04-03 18:10:49

#	User	Length	Language	Date
1	Sven Rönnbäck	498	Octave	2024-03-18 19:21:43

#	User	Length	Language	Date
1	Hidden user	840	Odin	2025-04-24 00:13:18

#	User	Length	Language	Date
1	Ingemar Ragnemalm	699	Pascal	2024-03-25 06:59:36
2	David Connolly	722	Pascal	2024-10-04 15:29:21

#	User	Length	Language	Date
1	Saito Ta	60	Perl	2024-03-27 10:18:20

#	User	Length	Language	Date
1	Renate	462	PHP	2024-04-07 17:01:42

#	User	Length	Language	Date
1	Yanmarshus Bachtiar	175	Python 2	2024-03-19 06:32:16
2	KALAJAYANTHI M	306	Python 2	2025-09-26 11:20:48
3	Johan Lyts	551	Python 2	2024-03-26 21:24:19

#	User	Length	Language	Date
1	Tobias Glimmerfors	61	Python 3	2025-07-03 16:30:29
2	Elias Lundell	61	Python 3	2025-07-04 10:42:34
3	Erik Adebahr	61	Python 3	2025-07-06 14:42:47
4	Vide Wallström	70	Python 3	2025-07-03 18:58:25
5	Kevin Gomez	83	Python 3	2024-03-22 02:00:00
6	Błażej Dariusz Roszkowski	90	Python 3	2024-04-02 14:09:50
7	Nicholas Russell Saerang	92	Python 3	2024-03-19 18:28:30
8	Carl Pittenger	94	Python 3	2024-03-18 20:23:24
9	Teikn Smith	104	Python 3	2024-03-22 01:38:32
10	Hidden user	104	Python 3	2025-07-04 10:15:11

#	User	Length	Language	Date
1	Thomas Feld	54	Ruby	2024-04-02 12:49:32
2	Russell Ng	72	Ruby	2024-08-16 16:50:21
3	Frederik Petersen	76	Ruby	2024-03-26 20:37:41
4	Clement Oh	103	Ruby	2024-03-24 13:47:10
5	Eugen Neagoe	144	Ruby	2026-01-28 22:20:09
6	Chenzhang Hu	165	Ruby	2025-09-22 17:42:56
7	Miorel Palii	185	Ruby	2024-11-09 07:54:37
8	Michael Lineweaver	314	Ruby	2025-09-28 20:47:43

#	User	Length	Language	Date
1	Vincent Lagerros	219	Rust	2024-09-11 18:08:27
2	Bas Dirks	520	Rust	2024-12-25 21:08:39
3	Simon Titkó	522	Rust	2024-11-17 00:17:19
4	Emil Dichmann	541	Rust	2025-08-21 16:15:23
5	David Rasch	556	Rust	2024-03-22 10:21:25
6	Aza Maulana Hadi	563	Rust	2024-03-19 19:54:07
7	Isak Jägberg	582	Rust	2024-10-10 16:05:01
8	Fredrik Eriksson	722	Rust	2024-09-22 21:44:05
9	Freek van Keulen	755	Rust	2024-03-18 16:18:44
10	gard heine kalland	779	Rust	2024-03-30 11:10:34

#	User	Length	Language	Date
1	AZm87	208	Swift	2024-04-08 19:03:15
2	Hidden user	402	Swift	2024-03-17 14:52:11
3	Jevania	433	Swift	2024-04-28 16:35:27

#	User	Length	Language	Date
1	Grettir Heimisson	3514	Zig	2025-10-29 14:55:48

Solution running time distribution