Problem I
Missing Numbers — Problem Statistics

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Submissions	10851
Accepted submissions	5572
Submission ratio	51.35%
Authors	5289
Accepted authors	4896
Author ratio	92.57%

#	User	Runtime	Language	Date
1	Sebastian Banert	0.00 s	Ada	2024-09-26 01:42:03

#	User	Runtime	Language	Date
1	Danny Robinson	0.01 s	Bash	2023-09-12 08:16:03
2	Chenzhang Hu	0.11 s	Bash	2024-04-16 15:52:16

#	User	Runtime	Language	Date
1	Thomas Koot	0.02 s	C#	2019-10-07 20:51:25
2	Joel Luis Chambilla Renjel	0.02 s	C#	2019-10-09 20:08:02
3	Henrik Hallbert	0.02 s	C#	2019-10-09 23:09:55
4	Thomas Norris	0.02 s	C#	2019-10-10 19:08:55
5	Steven Albertus Woodward	0.02 s	C#	2019-10-14 17:04:11
6	Kirill Durkin	0.02 s	C#	2019-10-16 14:17:49
7	Andreas Granberg	0.02 s	C#	2019-10-17 19:59:17
8	Gurpartap Singh Bhatti	0.02 s	C#	2019-11-17 05:14:51
9	Jayant Notani	0.02 s	C#	2020-01-24 23:50:18
10	Simon Lundqvist	0.02 s	C#	2020-02-04 15:08:51

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Common Lisp	2020-01-19 06:26:59
2	David Cawthon	0.01 s	Common Lisp	2020-11-10 03:42:06

#	User	Runtime	Language	Date
1	Patrick Bahr	0.04 s	F#	2021-02-21 21:45:06
2	Jacob Harris Cryer Kragh	0.04 s	F#	2022-07-04 17:30:33

#	User	Runtime	Language	Date
1	eric cantona	0.00 s	Go	2023-06-09 02:01:08
2	Jonas Mittnacht	0.00 s	Go	2024-01-31 15:12:04
3	Clark Vince Diala	0.00 s	Go	2024-05-09 23:41:11
4	Chris Vilches	0.00 s	Go	2024-10-31 12:36:47
5	Anmol Sharma	0.02 s	Go	2020-03-17 14:00:49
6	mg399	0.08 s	Go	2019-10-06 05:12:45
7	Norbert Voelker	0.08 s	Go	2021-01-23 01:10:29
8	Krzysztof Gibuła	0.08 s	Go	2021-02-23 17:44:56
9	Resa Renaldy	0.08 s	Go	2021-06-21 05:43:35
10	Izhari Ishak Aksa	0.08 s	Go	2021-08-25 02:33:31

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Haskell	2019-10-06 11:00:53
2	Tim Put	0.00 s	Haskell	2019-10-08 01:15:07
3	Kristian Sørdal	0.00 s	Haskell	2023-01-22 16:30:45
4	Dag Bjugn	0.00 s	Haskell	2023-01-25 15:23:21
5	Mason Barnhill	0.00 s	Haskell	2023-05-07 10:12:43
6	Rudy Matela	0.00 s	Haskell	2024-04-22 20:02:42
7	Trung Do	0.00 s	Haskell	2024-12-19 09:50:35
8	Brent Yorgey	0.01 s	Haskell	2019-10-10 02:55:57
9	Aurélien Pepin	0.01 s	Haskell	2019-11-30 14:37:14
10	Andreas Ländle	0.01 s	Haskell	2020-06-05 10:19:53

#	User	Runtime	Language	Date
1	Guangyi Zhou	0.04 s	Java	2024-12-05 18:51:41
2	Taras Romanyuk	0.04 s	Java	2024-12-12 21:02:01
3	Hidden user	0.04 s	Java	2025-01-21 14:35:27
4	Ranjith M	0.05 s	Java	2024-04-29 19:07:53
5	Ku Brian	0.05 s	Java	2024-05-16 04:21:08
6	Ryan Lee Ting Zhern	0.06 s	Java	2020-05-19 23:15:47
7	Igor Trúchlik	0.06 s	Java	2020-05-25 08:25:01
8	Theodoric Keith Lim	0.06 s	Java	2020-06-03 11:17:20
9	Mufaddal Naya	0.06 s	Java	2020-07-03 18:44:29
10	Kevin Dai	0.06 s	Java	2020-07-13 18:05:08

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	JavaScript (Node.js)	2024-08-23 22:33:05
2	Hidden user	0.05 s	JavaScript (Node.js)	2025-04-08 23:23:37
3	Veronica Yurek	0.40 s	JavaScript (Node.js)	2019-10-05 21:04:55
4	Peter Kedemo	0.41 s	JavaScript (Node.js)	2019-12-27 18:12:23
5	Chris Wong	0.41 s	JavaScript (Node.js)	2021-02-07 01:56:55
6	Stephanie Keck	0.42 s	JavaScript (Node.js)	2020-01-24 22:51:51
7	Andoko Chandra	0.42 s	JavaScript (Node.js)	2020-10-08 09:50:44
8	Mandala Binsar	0.42 s	JavaScript (Node.js)	2020-12-18 03:53:06
9	Howard Tin Chi Chan	0.42 s	JavaScript (Node.js)	2021-01-29 19:57:20
10	John	0.42 s	JavaScript (Node.js)	2021-02-27 04:18:54

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	JavaScript (SpiderMonkey)	2019-10-05 23:41:55
2	Nicklas Utgaard	0.02 s	JavaScript (SpiderMonkey)	2021-04-18 13:33:31
3	Christian Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-01-10 16:11:03
4	Andrew Stoute	0.02 s	JavaScript (SpiderMonkey)	2023-11-07 19:49:05
5	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-07-19 10:30:55
6	Jose Villegas	0.02 s	JavaScript (SpiderMonkey)	2025-02-04 05:45:28
7	Zachary DeStefano	0.03 s	JavaScript (SpiderMonkey)	2019-10-06 20:23:36
8	Bjørn Chr. Soltvedt	0.03 s	JavaScript (SpiderMonkey)	2019-10-10 14:16:18
9	Peter Menyes	0.03 s	JavaScript (SpiderMonkey)	2021-01-16 09:43:08

#	User	Runtime	Language	Date
1	Timothy Gaede	0.54 s	Julia	2024-03-26 04:59:23
2	Danny Robinson	0.57 s	Julia	2023-06-21 17:10:28
3	Vahag Altunyan	0.62 s	Julia	2024-06-07 13:08:36

#	User	Runtime	Language	Date
1	Nicholas Johnson	0.12 s	Kotlin	2022-02-05 22:26:26
2	Albert Pala	0.13 s	Kotlin	2021-07-01 06:26:33
3	Jacob Huebner	0.13 s	Kotlin	2022-02-01 21:48:02
4	Hidden user	0.14 s	Kotlin	2019-12-20 14:46:58
5	arda atci	0.17 s	Kotlin	2020-07-04 21:16:58
6	Marit van Dijk	0.17 s	Kotlin	2021-09-14 10:58:48
7	Dayan Ruben Gonzalez	0.18 s	Kotlin	2020-10-08 05:00:38
8	Magnus Wass	0.18 s	Kotlin	2020-12-22 00:30:57
9	Sarek Høverstad Skotåm	0.19 s	Kotlin	2020-10-07 00:10:16
10	Dmitry Shostak	0.19 s	Kotlin	2021-04-02 19:24:39

#	User	Runtime	Language	Date
1	Alfred Morgan	0.00 s	Nim	2024-09-20 10:33:42

#	User	Runtime	Language	Date
1	Mathias Ravn Tversted	0.00 s	OCaml	2019-10-06 20:51:31
2	Matthew Lutze	0.00 s	OCaml	2020-05-16 06:38:04
3	Shang-En Huang	0.00 s	OCaml	2023-01-19 18:18:16
4	Kaspar Tvedt Moberg	0.00 s	OCaml	2023-05-30 16:23:54
5	Brandon Tang	0.00 s	OCaml	2023-09-22 10:43:02

#	User	Runtime	Language	Date
1	林達炘4D20 Lam Tat Yan	0.00 s	Pascal	2020-02-20 03:53:54
2	Ingemar Ragnemalm	0.00 s	Pascal	2020-04-02 07:54:13
3	David Connolly	0.00 s	Pascal	2021-11-22 18:16:07

#	User	Runtime	Language	Date
1	Jonas Lindenskov Nielsen	0.01 s	PHP	2019-10-08 10:59:13
2	cojonas1	0.01 s	PHP	2021-01-18 11:51:36
3	Renate	0.01 s	PHP	2021-06-14 01:17:45
4	Andre Wahyudi	0.01 s	PHP	2023-03-15 11:11:46

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.02 s	Prolog	2021-12-13 11:46:59
2	Hakan Kjellerstrand	0.02 s	Prolog	2023-02-01 23:31:45

#	User	Runtime	Language	Date
1	Hasan Kalzi	0.02 s	Python 2	2022-06-18 20:52:32
2	Zhuyin Lyu	0.02 s	Python 2	2022-10-04 06:10:48
3	Wen Li Looi	0.03 s	Python 2	2019-10-05 20:21:51
4	DONGYAO LIANG	0.03 s	Python 2	2019-10-05 20:55:39
5	Gracen Hoyle	0.03 s	Python 2	2019-10-05 21:51:49
6	Lim Hong Hui Eugene	0.03 s	Python 2	2019-10-08 12:47:38
7	NickGeo	0.03 s	Python 2	2019-10-19 00:38:38
8	Siraj Yesuf	0.03 s	Python 2	2019-10-25 17:26:29
9	Måns Magnusson	0.03 s	Python 2	2019-10-27 10:24:31
10	Björn Magnusson	0.03 s	Python 2	2019-10-28 16:43:23

#	User	Runtime	Language	Date
1	Minh Pham	0.02 s	Python 3	2019-10-05 20:03:58
2	Eric Ge	0.02 s	Python 3	2019-10-05 20:04:20
3	Ahmed Sabie	0.02 s	Python 3	2019-10-05 20:04:27
4	Yao Yiheng	0.02 s	Python 3	2019-10-05 20:05:52
5	Robert Zeller	0.02 s	Python 3	2019-10-05 20:05:54
6	Jake Crouch	0.02 s	Python 3	2019-10-05 20:07:15
7	Leo Gao	0.02 s	Python 3	2019-10-05 20:07:36
8	Kenneth Li	0.02 s	Python 3	2019-10-05 20:07:39
9	Chinagorom Mbaraonye	0.02 s	Python 3	2019-10-05 20:07:41
10	Joseph Durie	0.02 s	Python 3	2019-10-05 20:08:12

#	User	Runtime	Language	Date
1	Hidden user	0.04 s	Ruby	2019-10-07 21:07:23
2	Macdara mac an tSionnaigh	0.04 s	Ruby	2019-11-25 03:57:46
3	Samuel Jefferis	0.05 s	Ruby	2020-10-13 03:43:31
4	Donald Dong	0.05 s	Ruby	2021-02-23 07:14:36
5	Palash Agarwal	0.05 s	Ruby	2021-02-24 01:02:59
6	Jesse van der Pluijm	0.05 s	Ruby	2021-04-04 19:09:46
7	Hadi Qovaizi	0.05 s	Ruby	2021-08-02 04:52:12
8	Nathan Derr	0.05 s	Ruby	2021-09-07 21:41:13
9	Régis Hanol	0.05 s	Ruby	2022-01-09 16:28:14
10	Thomas Feld	0.06 s	Ruby	2022-11-25 15:59:42

#	User	Length	Language	Date
1	Sebastian Banert	499	Ada	2024-09-26 01:42:03

#	User	Length	Language	Date
1	Chenzhang Hu	5	Bash	2024-04-16 15:52:16
2	Danny Robinson	61	Bash	2023-09-12 08:16:03

#	User	Length	Language	Date
1	Muhammed Ali Aytürk	227	C	2020-03-11 21:59:59
2	Kyle Edward Aquino	261	C	2019-10-17 17:27:40
3	Matthew Weston	264	C	2022-01-02 18:27:09
4	Kai Cao	281	C	2019-10-09 16:25:59
5	Ivan Chew	287	C	2020-12-17 04:15:22
6	Solar Solar	287	C	2021-11-22 22:42:00
7	Chandu Gudi	289	C	2021-11-21 06:09:31
8	319126510188 VENKATA GOPI NAGARAJU BOTLAGUNTA	291	C	2021-01-26 07:26:34
9	Gopi Botlagunta	291	C	2021-01-26 07:29:02
10	Marco Mazza	302	C	2021-12-26 16:14:27

#	User	Length	Language	Date
1	Michael Fourie	433	C#	2024-09-19 00:20:59
2	Anthony Ye	468	C#	2023-07-09 17:57:47
3	Thomas Norris	487	C#	2019-10-10 19:08:55
4	Kyaw Win Htet	496	C#	2021-12-28 05:45:35
5	Frian Tampake	534	C#	2023-03-24 03:29:14
6	Esty Crow	560	C#	2023-07-08 04:22:10
7	Drew Hudson	601	C#	2024-09-06 20:51:52
8	Alexander Christensen	610	C#	2021-02-23 12:39:01
9	Sal Tringali	645	C#	2023-11-11 19:34:41
10	Stefan Forsberg	654	C#	2022-04-22 23:18:04

#	User	Length	Language	Date
1	Frans Meulenbroeks	129	C++	2025-02-24 20:26:19
2	Tyler Fernando	157	C++	2022-11-10 03:16:44
3	a_b__c	183	C++	2021-02-08 18:07:03
4	Xingheng Lin	244	C++	2019-10-05 20:35:06
5	黃太陽	255	C++	2023-06-07 17:09:10
6	Dani Alfaris	256	C++	2020-04-07 05:40:06
7	Cangnai Fang	265	C++	2020-10-15 16:33:24
8	白川翎羽	270	C++	2021-03-23 12:18:31
9	Jiarui Zhang	273	C++	2019-10-05 20:05:37
10	Jalvin Chan Jia Xiang	278	C++	2020-01-06 05:14:16

#	User	Length	Language	Date
1	Hidden user	345	Common Lisp	2020-01-19 06:26:59
2	David Cawthon	436	Common Lisp	2020-11-10 03:42:06

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	728	F#	2022-07-04 17:30:33
2	Patrick Bahr	1933	F#	2021-02-21 21:45:06

#	User	Length	Language	Date
1	Chris Vilches	272	Go	2024-10-31 12:36:47
2	eric cantona	296	Go	2023-06-09 02:01:08
3	Clark Vince Diala	306	Go	2024-05-09 23:41:11
4	Izhari Ishak Aksa	348	Go	2021-08-25 02:33:31
5	Jonas Mittnacht	373	Go	2024-01-31 15:12:04
6	Lucca Dias	401	Go	2021-11-09 00:10:35
7	Resa Renaldy	430	Go	2021-06-21 05:43:35
8	Anmol Sharma	508	Go	2020-03-17 14:00:49
9	Krzysztof Gibuła	593	Go	2021-02-23 17:44:56
10	Norbert Voelker	606	Go	2021-01-23 01:10:29

#	User	Length	Language	Date
1	Brent Yorgey	173	Haskell	2019-10-10 03:56:21
2	Liam Scalzulli	209	Haskell	2021-12-28 19:16:50
3	Joshua Coward	282	Haskell	2021-11-22 22:37:36
4	Mason Barnhill	333	Haskell	2023-05-07 10:12:43
5	Trung Do	354	Haskell	2024-12-19 09:50:35
6	Jan Hrček	356	Haskell	2020-10-25 09:24:55
7	Anders Aarsæther	376	Haskell	2021-11-05 15:03:55
8	Dag Bjugn	386	Haskell	2023-01-25 15:23:21
9	Andreas Ländle	390	Haskell	2020-06-05 10:19:53
10	Øyvind Almli	393	Haskell	2021-05-23 18:39:05

#	User	Length	Language	Date
1	Victor Ortiz	416	Java	2019-10-05 20:19:26
2	Åke Wettergren	420	Java	2019-10-27 10:28:31
3	Hidden user	423	Java	2019-10-05 20:16:22
4	Jeffrey Tong	440	Java	2019-10-11 06:21:28
5	Matthew Craven	440	Java	2019-10-05 20:38:15
6	Jacob Steinebronn	442	Java	2019-10-05 20:15:30
7	Hidden user	444	Java	2020-06-09 12:12:52
8	Emmett Jesrani	444	Java	2022-01-20 05:58:28
9	Jake Crampton	444	Java	2019-10-05 21:01:32
10	Anton Sandin	451	Java	2022-05-03 09:32:10

#	User	Length	Language	Date
1	Peter Kedemo	458	JavaScript (Node.js)	2019-12-27 18:12:23
2	Chris Wong	558	JavaScript (Node.js)	2021-02-07 01:56:55
3	Howard Tin Chi Chan	600	JavaScript (Node.js)	2021-01-29 19:57:20
4	Ralf Leistad	619	JavaScript (Node.js)	2021-08-04 22:53:53
5	Mandala Binsar	623	JavaScript (Node.js)	2020-12-18 03:53:06
6	Ryoki Kunii	727	JavaScript (Node.js)	2020-10-08 12:48:06
7	Hidden user	761	JavaScript (Node.js)	2024-08-23 22:33:05
8	Hidden user	937	JavaScript (Node.js)	2025-04-08 23:23:37
9	Andoko Chandra	1036	JavaScript (Node.js)	2020-10-08 09:50:44
10	Niamh Limerick	1080	JavaScript (Node.js)	2022-04-13 15:55:58

#	User	Length	Language	Date
1	Jimmy Gustafsson	133	JavaScript (SpiderMonkey)	2024-07-19 10:30:55
2	Zachary DeStefano	226	JavaScript (SpiderMonkey)	2019-10-06 20:23:36
3	Christian Cederquist	237	JavaScript (SpiderMonkey)	2023-01-10 16:11:03
4	Hidden user	251	JavaScript (SpiderMonkey)	2019-10-05 23:41:55
5	Peter Menyes	279	JavaScript (SpiderMonkey)	2021-01-16 09:43:08
6	Bjørn Chr. Soltvedt	291	JavaScript (SpiderMonkey)	2019-10-10 14:16:18
7	Jose Villegas	447	JavaScript (SpiderMonkey)	2025-02-04 05:45:28
8	Nicklas Utgaard	485	JavaScript (SpiderMonkey)	2021-04-18 13:33:31
9	Andrew Stoute	613	JavaScript (SpiderMonkey)	2023-11-07 19:49:05

#	User	Length	Language	Date
1	Danny Robinson	96	Julia	2023-09-12 08:11:54
2	Vahag Altunyan	210	Julia	2024-06-07 13:08:36
3	Timothy Gaede	705	Julia	2024-03-26 04:59:23

#	User	Length	Language	Date
1	Magnus Wass	277	Kotlin	2020-12-22 00:30:57
2	Dayan Ruben Gonzalez	389	Kotlin	2020-10-08 05:00:38
3	Dmitry Shostak	411	Kotlin	2021-04-03 04:54:27
4	Sarek Høverstad Skotåm	413	Kotlin	2020-10-07 00:10:16
5	Marit van Dijk	424	Kotlin	2021-09-14 10:58:48
6	Jacob Huebner	439	Kotlin	2022-02-01 21:48:02
7	Einar Kjellback	445	Kotlin	2019-12-10 16:01:48
8	lva	465	Kotlin	2024-02-29 14:40:54
9	Merih Bora Poçan	480	Kotlin	2020-09-08 06:38:06
10	arda atci	519	Kotlin	2020-07-04 21:16:58

#	User	Length	Language	Date
1	Alfred Morgan	295	Nim	2024-09-20 10:33:42

#	User	Length	Language	Date
1	Brandon Tang	329	OCaml	2023-09-22 10:43:02
2	Shang-En Huang	555	OCaml	2023-01-19 18:18:16
3	Matthew Lutze	731	OCaml	2020-05-16 06:38:04
4	Kaspar Tvedt Moberg	814	OCaml	2023-05-30 16:23:54
5	Mathias Ravn Tversted	856	OCaml	2019-10-06 20:51:31

#	User	Length	Language	Date
1	Ingemar Ragnemalm	326	Pascal	2020-04-02 07:54:13
2	林達炘4D20 Lam Tat Yan	528	Pascal	2020-02-20 03:53:54
3	David Connolly	745	Pascal	2021-11-22 18:16:07

#	User	Length	Language	Date
1	Renate	304	PHP	2021-06-14 01:17:45
2	Jonas Lindenskov Nielsen	422	PHP	2019-10-08 10:59:13
3	cojonas1	536	PHP	2021-01-18 11:51:36
4	Andre Wahyudi	805	PHP	2023-03-15 11:11:46

#	User	Length	Language	Date
1	Hakan Kjellerstrand	260	Prolog	2023-02-01 23:31:45
2	Andriy Zyevakov	608	Prolog	2021-12-13 11:46:59

#	User	Length	Language	Date
1	Thomas Feld	148	Python 2	2019-10-08 17:39:27
2	Siraj Yesuf	164	Python 2	2019-10-25 17:26:29
3	Wen Li Looi	174	Python 2	2019-10-05 20:21:51
4	Noobs	196	Python 2	2021-04-22 08:08:56
5	Andreas Björklund	197	Python 2	2019-10-06 11:19:30
6	Johan Lyts	206	Python 2	2019-10-26 15:35:55
7	Justin Su	210	Python 2	2020-01-13 06:20:27
8	Sigurður Jens Albertsson	210	Python 2	2020-06-07 19:22:49
9	Michael Wang	210	Python 2	2019-10-05 20:47:58
10	Godmar Back	210	Python 2	2019-10-06 15:21:30

#	User	Length	Language	Date
1	Nguyên Khôi Đỗ	82	Python 3	2025-01-07 01:17:08
2	Clement Oh	83	Python 3	2023-05-19 15:54:58
3	Tobias Glimmerfors	88	Python 3	2022-07-02 20:46:30
4	Benjamin Verbeek	88	Python 3	2022-07-03 00:18:21
5	Elias Lundell	90	Python 3	2022-07-02 21:20:29
6	Tai Tze Kin	90	Python 3	2024-04-20 22:36:24
7	Tam Keng Hong	99	Python 3	2023-01-12 04:52:50
8	Fredrik Löfgren	101	Python 3	2022-07-02 18:23:36
9	Henrik Olsen Eide	111	Python 3	2023-09-01 09:23:25
10	Charles Ancheta	120	Python 3	2023-03-28 09:30:03

#	User	Length	Language	Date
1	Russell Ng	56	Ruby	2025-05-29 10:41:39
2	Thomas Feld	57	Ruby	2023-01-02 14:11:27
3	Régis Hanol	93	Ruby	2022-01-09 16:28:14
4	Palash Agarwal	173	Ruby	2021-02-24 01:02:59
5	Eugen Neagoe	207	Ruby	2023-03-28 23:55:08
6	Macdara mac an tSionnaigh	208	Ruby	2019-11-25 03:57:46
7	Donald Dong	264	Ruby	2021-02-23 07:14:36
8	Nathan Derr	271	Ruby	2021-09-07 21:41:13
9	Hidden user	273	Ruby	2019-10-07 21:07:23
10	Samuel Jefferis	477	Ruby	2020-10-13 03:43:31

#	User	Length	Language	Date
1	David Aldenbro	229	Rust	2023-10-22 13:48:57
2	Vincent Lagerros	434	Rust	2025-01-26 16:05:25
3	Joe Blower	455	Rust	2025-06-11 02:47:31
4	Tanguy Vansnick	487	Rust	2024-03-25 23:49:10
5	Simon Hallefält	531	Rust	2023-09-02 14:08:15
6	Horst Local	550	Rust	2025-05-17 15:56:52
7	David Rasch	551	Rust	2021-01-18 16:52:54
8	David Zacek	551	Rust	2021-06-01 18:03:27
9	Oskar Strömberg	556	Rust	2020-10-23 20:22:03
10	JJ De Rooy	569	Rust	2022-01-05 20:48:17

Solution running time distribution