Problem A
I Hate The Number Nine — Problem Statistics

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Submissions	5125
Accepted submissions	1960
Submission ratio	38.24%
Authors	1741
Full solves [?]	1509
Full solve Ratio	86.67%

#	User	Runtime	Language	Date
1	Chenzhang Hu	0.03 s	Bash	2023-12-21 16:41:29

#	User	Runtime	Language	Date
1	Samuel Wrååk	0.02 s	C#	2016-07-05 08:47:00
2	Ugnius Skučas	0.02 s	C#	2016-10-15 16:47:04
3	Eva Debenjak	0.02 s	C#	2016-12-05 15:11:37
4	Tristan Close	0.02 s	C#	2017-03-15 21:39:25
5	Klas af Geijerstam	0.02 s	C#	2017-06-11 20:17:36
6	Jens Schmidt Hansen	0.02 s	C#	2018-10-22 22:53:10
7	Jasmin Baniya	0.02 s	C#	2020-04-26 22:55:44
8	Bryan Shiffman	0.03 s	C#	2015-09-22 14:33:19
9	Tomas Vainoris	0.04 s	C#	2023-09-30 10:34:33
10	Ernestas Valentinas	0.04 s	C#	2023-09-30 13:43:11

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	Common Lisp	2019-07-11 18:18:45
2	David Cawthon	0.02 s	Common Lisp	2019-04-29 13:29:23

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.05 s	F#	2023-05-03 17:40:08

#	User	Runtime	Language	Date
1	Norbert Voelker	0.02 s	Go	2021-11-11 23:23:54
2	Yitian Wang	0.02 s	Go	2023-01-19 02:40:49
3	Nyamdavaa Amar	0.08 s	Go	2022-04-21 04:51:06

#	User	Runtime	Language	Date
1	Stela Palii	0.04 s	Java	2024-12-08 21:51:34
2	Rene Argento	0.04 s	Java	2024-12-19 18:13:47
3	Hunter Brickers	0.04 s	Java	2025-10-15 15:53:49
4	Gabriel Robinson	0.04 s	Java	2025-11-19 04:55:23
5	Marte Dybevik Løge	0.05 s	Java	2015-04-25 15:00:42
6	Hidden user	0.05 s	Java	2015-09-22 00:52:27
7	Nguyễn Mạnh Phúc	0.05 s	Java	2015-10-24 05:15:29
8	Nick Wu	0.05 s	Java	2015-10-24 06:37:49
9	Erik Baalhuis	0.05 s	Java	2015-11-02 23:54:52
10	Paul Boddington	0.05 s	Java	2016-05-02 17:11:05

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-01-30 15:10:44
2	Bjørn Chr. Soltvedt	0.02 s	JavaScript (SpiderMonkey)	2024-06-28 14:58:29

#	User	Runtime	Language	Date
1	Hidden user	0.45 s	Julia	2025-03-16 07:45:21
2	Timothy Gaede	0.62 s	Julia	2024-04-10 03:20:30

#	User	Runtime	Language	Date
1	Kelsan Dorjee	0.15 s	Kotlin	2018-12-14 00:01:01
2	Phường Lên	0.16 s	Kotlin	2020-02-03 20:45:07
3	Adam Koprowski	0.18 s	Kotlin	2021-06-28 22:03:01

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Nim	2025-06-11 17:34:48

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.01 s	Prolog	2016-02-19 17:11:00
2	Adriaan de Vries	0.01 s	Prolog	2020-03-12 15:53:37

#	User	Runtime	Language	Date
1	Arne Tobias Malkenes Ødegaard	0.02 s	Python 2	2015-04-25 11:04:39
2	Jean Niklas L'orange	0.02 s	Python 2	2015-04-25 11:31:54
3	Håkon Verås	0.02 s	Python 2	2015-04-25 12:23:26
4	Tore Norderud	0.02 s	Python 2	2015-04-25 17:28:51
5	Alex Dai	0.02 s	Python 2	2015-05-02 19:16:43
6	Johan Wind	0.02 s	Python 2	2015-09-14 23:01:00
7	Neal Zane	0.02 s	Python 2	2016-01-19 08:06:15
8	Marko Lazic	0.02 s	Python 2	2017-01-05 21:38:03
9	Tomas Alvarez	0.02 s	Python 2	2017-05-10 19:40:33
10	Trevor Masters	0.02 s	Python 2	2017-07-17 19:13:21

#	User	Runtime	Language	Date
1	Simon Lindholm	0.02 s	Python 3	2015-04-27 12:00:20
2	James Elías Sigurðarson	0.02 s	Python 3	2015-06-12 02:29:01
3	Song Kai	0.02 s	Python 3	2015-09-11 09:17:19
4	Niclas Fuglesang Geuken	0.02 s	Python 3	2015-10-01 12:24:34
5	Ivar Flakstad	0.02 s	Python 3	2016-04-06 14:27:12
6	Arnar Bjarni Arnarson	0.02 s	Python 3	2016-04-19 06:10:35
7	Wayne	0.02 s	Python 3	2016-06-24 22:52:09
8	Christian Lindeström	0.02 s	Python 3	2016-09-13 05:55:43
9	Tony Zhang	0.02 s	Python 3	2016-10-19 05:58:05
10	Daniel Johnson	0.02 s	Python 3	2016-10-19 05:59:21

#	User	Runtime	Language	Date
1	Mehdi Maick	0.03 s	Ruby	2016-09-11 21:48:41
2	Hidden user	0.04 s	Ruby	2019-09-29 18:59:50
3	Zohar Malamant	0.05 s	Ruby	2018-04-23 16:15:37
4	Daniel Harder	0.05 s	Ruby	2018-09-28 22:02:59
5	Macdara mac an tSionnaigh	0.05 s	Ruby	2019-11-02 20:01:48
6	Patrick Elsen	0.06 s	Ruby	2019-05-02 19:18:05
7	Thomas Feld	0.06 s	Ruby	2022-12-13 07:56:14
8	Chenzhang Hu	0.06 s	Ruby	2024-11-29 09:55:03

#	User	Runtime	Language	Date
1	Eric Pinter	0.00 s	Rust	2020-08-06 18:50:49
2	Muhammad Rais Fathin Mudzakir	0.00 s	Rust	2021-05-29 20:06:08
3	Bas Dirks	0.00 s	Rust	2022-01-26 18:21:00
4	Yoeri Otten	0.00 s	Rust	2022-05-08 04:14:12
5	David Rasch	0.00 s	Rust	2022-11-18 16:11:46
6	Aaron Lengyel	0.00 s	Rust	2023-01-12 02:58:50
7	Samuel Bell	0.00 s	Rust	2023-05-21 03:46:09
8	Vincent Lagerros	0.00 s	Rust	2024-05-26 14:04:16
9	gard heine kalland	0.00 s	Rust	2024-06-17 13:35:00
10	Chris Seager	0.00 s	Rust	2025-03-27 01:17:02

#	User	Length	Language	Date
1	Chenzhang Hu	45	Bash	2025-09-13 04:17:05

#	User	Length	Language	Date
1	April Clark	428	C	2021-09-21 14:31:00
2	Hidden user	476	C	2017-07-06 10:47:18
3	Haobo Jiang	498	C	2015-10-08 15:14:10
4	Jack Min Ong	503	C	2020-04-14 10:28:56
5	Hidden user	517	C	2017-12-06 21:47:27
6	Andrew Roberts	525	C	2019-05-31 21:44:48
7	Svein Høgemo	537	C	2018-05-12 00:09:14
8	Mirel Cosulschi	541	C	2024-10-31 17:43:01
9	貓貓吃狗狗	548	C	2015-10-24 06:43:03
10	Sebastian Valencia	548	C	2016-06-07 06:01:46

#	User	Length	Language	Date
1	Michael Damsgaard	361	C#	2025-01-02 04:52:06
2	traxex	365	C#	2024-05-25 20:11:20
3	Klas af Geijerstam	458	C#	2017-06-11 20:17:36
4	Ugnius Skučas	513	C#	2016-10-15 16:47:04
5	Jens Schmidt Hansen	584	C#	2018-10-22 22:53:10
6	Tristan Close	672	C#	2017-03-15 21:39:25
7	Ernestas Valentinas	867	C#	2023-09-30 13:43:11
8	Tomas Vainoris	1138	C#	2023-09-30 10:34:33
9	Samuel Wrååk	1192	C#	2016-07-05 08:47:00
10	Jasmin Baniya	1316	C#	2020-04-26 22:55:44

#	User	Length	Language	Date
1	Derrick Liu	151	C++	2025-09-24 21:37:59
2	Rohil Shah	152	C++	2024-03-15 01:51:19
3	Nathaniel Ang	334	C++	2020-03-04 09:01:15
4	Matias Holte	338	C++	2015-04-25 11:50:57
5	Herman Karlsson	340	C++	2016-01-22 23:35:07
6	Imtiaj Hossain Saikat	341	C++	2023-09-30 07:09:44
7	Sakib Mustafa	348	C++	2024-09-29 15:44:17
8	Yeung Man Tsung	352	C++	2022-11-18 17:01:10
9	Edward Keitaro	356	C++	2018-04-17 09:48:26
10	Leo Lee	357	C++	2024-09-11 17:45:10

#	User	Length	Language	Date
1	Hidden user	336	Common Lisp	2019-07-11 18:18:45
2	David Cawthon	1447	Common Lisp	2019-04-29 13:29:23

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	683	F#	2023-05-03 17:40:08

#	User	Length	Language	Date
1	Nyamdavaa Amar	387	Go	2022-04-21 04:51:06
2	Norbert Voelker	650	Go	2021-11-11 23:23:54
3	Yitian Wang	910	Go	2023-01-19 02:40:49

#	User	Length	Language	Date
1	Jannik Olbrich	159	Haskell	2023-07-19 15:03:30
2	Birk Tjelmeland	357	Haskell	2018-05-23 20:49:13
3	Anthony Clays	397	Haskell	2017-01-17 20:41:57
4	Aurélien Pepin	410	Haskell	2019-09-19 19:07:04
5	Md Akif Chowdhury	483	Haskell	2023-07-11 19:38:36
6	Josenildo Silva	506	Haskell	2016-12-30 13:59:22
7	Zohar Malamant	506	Haskell	2018-04-23 17:31:10
8	Willem Van Onsem	512	Haskell	2017-06-16 15:29:31
9	Steinar Simonnes	527	Haskell	2024-05-13 18:19:44
10	amund lindberg	542	Haskell	2017-06-16 15:22:57

#	User	Length	Language	Date
1	Rene Josiah M. Quinto	426	Java	2015-11-14 06:30:31
2	Drake Packard	485	Java	2018-03-07 20:59:41
3	Zimu Qin	504	Java	2015-09-28 18:53:19
4	Peter Gabrielsen	506	Java	2015-04-25 12:57:33
5	Leon Kennedy	506	Java	2017-08-09 23:43:18
6	Thomas Rooijakkers	509	Java	2016-09-09 15:36:56
7	Thomas King	510	Java	2020-04-10 17:55:58
8	Håkon Heggernes Lerring	525	Java	2015-04-25 13:35:09
9	Birgir Orri Óðinsson	526	Java	2019-03-18 22:10:34
10	Fredrik Persson	528	Java	2023-08-15 15:36:12

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	435	JavaScript (SpiderMonkey)	2023-01-30 15:10:44
2	Bjørn Chr. Soltvedt	565	JavaScript (SpiderMonkey)	2024-06-28 14:58:29

#	User	Length	Language	Date
1	Hidden user	86	Julia	2025-03-16 07:53:50
2	Timothy Gaede	617	Julia	2024-04-10 03:20:30

#	User	Length	Language	Date
1	Phường Lên	901	Kotlin	2020-02-03 20:45:07
2	Kelsan Dorjee	2114	Kotlin	2018-12-14 00:01:01
3	Adam Koprowski	4048	Kotlin	2021-06-28 22:03:01

#	User	Length	Language	Date
1	Hidden user	591	Nim	2025-06-11 17:34:48

#	User	Length	Language	Date
1	Adriaan de Vries	1760	Prolog	2020-03-12 15:53:37
2	Andriy Zyevakov	4100	Prolog	2016-02-19 17:11:00

#	User	Length	Language	Date
1	Raymond van Venetie	53	Python 2	2019-05-14 15:53:42
2	Mees de Vries	53	Python 2	2019-05-14 16:01:41
3	Angela Qian	55	Python 2	2025-09-22 21:01:55
4	Dmitri Anh-Minh Tran	58	Python 2	2024-03-12 21:13:26
5	Lars Åström	73	Python 2	2018-11-15 14:19:26
6	Hidden user	96	Python 2	2018-12-15 21:59:50
7	Thomas Feld	98	Python 2	2019-09-09 08:50:52
8	Alex Dai	100	Python 2	2015-05-02 19:16:43
9	Neal Zane	103	Python 2	2016-01-19 08:06:15
10	Mukerem Ali Nur	103	Python 2	2019-11-17 12:53:12

#	User	Length	Language	Date
1	Morten Clausen	60	Python 3	2022-10-06 00:12:40
2	Benjamin Z White	60	Python 3	2023-04-21 00:38:49
3	Benjamin Ye	60	Python 3	2024-03-05 20:08:56
4	Michael Wu	60	Python 3	2024-03-06 05:01:09
5	Anshuman Dash	64	Python 3	2024-03-07 23:06:29
6	Raymond van Venetie	66	Python 3	2019-05-14 15:47:56
7	Angela Qian	66	Python 3	2025-09-22 20:20:23
8	Teikn Smith	67	Python 3	2022-08-24 01:38:47
9	James Rettie	67	Python 3	2023-01-18 03:51:25
10	Guk Yi Siong	69	Python 3	2023-07-23 08:58:17

#	User	Length	Language	Date
1	Thomas Feld	40	Ruby	2022-12-13 07:56:56
2	Chenzhang Hu	40	Ruby	2024-11-29 09:55:03
3	Hidden user	69	Ruby	2019-09-29 18:59:50
4	Zohar Malamant	162	Ruby	2018-04-23 16:15:37
5	Macdara mac an tSionnaigh	179	Ruby	2019-11-02 20:01:48
6	Daniel Harder	327	Ruby	2018-09-28 22:02:59
7	Mehdi Maick	350	Ruby	2016-09-11 21:48:41
8	Patrick Elsen	447	Ruby	2019-05-02 19:18:05

#	User	Length	Language	Date
1	Bas Dirks	522	Rust	2022-01-26 18:21:00
2	Vincent Lagerros	564	Rust	2024-05-26 14:04:16
3	David Rasch	740	Rust	2022-11-18 16:11:46
4	Samuel Bell	918	Rust	2023-05-21 03:46:09
5	Chris Seager	959	Rust	2025-03-27 01:17:02
6	Eric Pinter	1242	Rust	2020-08-06 18:50:49
7	Yoeri Otten	2293	Rust	2022-05-08 04:14:12
8	gard heine kalland	3197	Rust	2024-06-17 13:35:00
9	Muhammad Rais Fathin Mudzakir	4219	Rust	2021-05-29 20:06:08
10	Aaron Lengyel	4663	Rust	2023-01-12 02:58:50

Solution running time distribution