Problem B
Happy and Unhappy Numbers — Problem Statistics

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Submissions	596
Accepted submissions	171
Submission ratio	28.69%
Authors	136
Full solves [?]	94
Full solve Ratio	69.12%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.03 s	C	2021-10-21 11:04:11
2	Guillermo Hernández	0.06 s	C	2021-10-21 08:08:22

#	User	Runtime	Language	Date
1	Bernard Teo	0.01 s	C++	2021-10-22 17:55:17
2	Felix Köhler	0.01 s	C++	2022-09-06 20:29:43
3	Nicholas Foo Chuan Le	0.02 s	C++	2021-10-21 18:46:26
4	Vincent Tandya	0.02 s	C++	2021-10-23 07:49:03
5	Guan Yang Ze	0.02 s	C++	2021-11-01 10:05:11
6	Agis Daniels	0.02 s	C++	2022-01-03 17:22:35
7	Filip Hovorka	0.02 s	C++	2022-01-13 23:55:58
8	Dmitry Lyubshin	0.02 s	C++	2023-05-07 10:55:44
9	Max Nilsson	0.02 s	C++	2023-06-24 14:31:28
10	Andrew Polizzotto	0.02 s	C++	2024-01-22 22:02:45

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.59 s	Haskell	2025-02-07 08:41:19

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.11 s	Java	2022-03-28 20:42:44
2	Bjørn Dons	0.11 s	Java	2023-07-16 11:54:09
3	Crystal Sharpe	0.12 s	Java	2021-10-21 08:51:28
4	Liam Keliher	0.17 s	Java	2021-10-24 11:53:47
5	Brent Yorgey	0.18 s	Java	2021-10-23 05:19:21
6	Bassilekin jean simonet	0.23 s	Java	2025-04-21 23:03:02
7	Micah Stairs	0.31 s	Java	2021-11-27 02:13:18
8	Dylan Smith	0.33 s	Java	2021-10-26 02:10:24
9	polimed	0.65 s	Java	2025-06-28 23:26:07

#	User	Runtime	Language	Date
1	Christian Pilegaard Cederquist	0.14 s	JavaScript (SpiderMonkey)	2024-08-22 09:04:33
2	Bjørn Chr. Soltvedt	0.16 s	JavaScript (SpiderMonkey)	2021-10-22 06:35:11

#	User	Runtime	Language	Date
1	ZANGUE JOREL TIOMELA	0.94 s	Kotlin	2025-04-21 21:44:26

#	User	Runtime	Language	Date
1	Johan Lyts	0.16 s	Python 2	2021-10-23 13:43:11

#	User	Runtime	Language	Date
1	Ocram Esah	0.09 s	Python 3	2022-06-06 10:48:00
2	Hidden user	0.12 s	Python 3	2026-02-13 19:30:32
3	ALPHONSE DESIRE JUNIOR ENAMA	0.13 s	Python 3	2025-04-23 23:34:15
4	CharlesMarsh	0.21 s	Python 3	2022-12-22 19:27:20
5	Dilhan Salgado	0.24 s	Python 3	2025-11-20 21:19:34
6	John Isak Fjellvang Villanger	0.26 s	Python 3	2025-07-19 15:22:27
7	Lex Janssens	0.34 s	Python 3	2021-10-22 00:02:23
8	Isaac Lee	0.35 s	Python 3	2021-12-29 03:23:50
9	Nicholas Russell Saerang	0.38 s	Python 3	2023-08-05 08:12:06
10	Benjamin Z White	0.39 s	Python 3	2023-07-13 10:14:27

#	User	Runtime	Language	Date
1	Thomas Feld	0.82 s	Ruby	2025-08-25 12:33:21

#	User	Runtime	Language	Date
1	Jakob Rødal Skaar	0.00 s	Rust	2025-11-19 17:49:29

#	User	Length	Language	Date
1	Guillermo Hernández	871	C	2021-10-21 08:08:22
2	Bergur Snorrason	1984	C	2021-10-21 11:04:11

#	User	Length	Language	Date
1	Hidden user	544	C++	2024-02-15 15:23:41
2	Andrew Daniel Janong	642	C++	2023-04-05 16:57:13
3	Dmitry Lyubshin	656	C++	2023-05-07 10:55:44
4	Mutiraj Laksanawisit	679	C++	2023-04-16 04:59:57
5	Vincent Tandya	713	C++	2021-10-23 07:49:03
6	FermatingCode	744	C++	2025-06-28 22:54:45
7	Alexander Skidanov	760	C++	2025-05-30 02:25:16
8	Ryan Tan	792	C++	2023-04-20 14:54:21
9	Armen Andreasyan	856	C++	2022-01-08 13:34:29
10	Guan Yang Ze	900	C++	2021-11-01 10:05:11

#	User	Length	Language	Date
1	Steinar Simonnes	1861	Haskell	2025-02-07 08:46:41

#	User	Length	Language	Date
1	Crystal Sharpe	1161	Java	2021-10-21 08:51:28
2	polimed	1768	Java	2025-06-28 23:26:07
3	Bassilekin jean simonet	2186	Java	2025-04-21 23:03:02
4	Micah Stairs	2724	Java	2021-11-27 02:13:18
5	Dylan Smith	2909	Java	2021-10-26 02:10:24
6	Liam Keliher	2994	Java	2021-10-24 11:51:04
7	Brent Yorgey	4417	Java	2021-10-23 05:19:21
8	Sven Rönnbäck	5742	Java	2022-03-28 20:47:10
9	Bjørn Dons	6222	Java	2023-07-16 11:54:09

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	603	JavaScript (SpiderMonkey)	2024-08-22 08:47:00
2	Bjørn Chr. Soltvedt	114498	JavaScript (SpiderMonkey)	2021-10-22 06:35:11

#	User	Length	Language	Date
1	ZANGUE JOREL TIOMELA	907	Kotlin	2025-04-21 21:44:26

#	User	Length	Language	Date
1	Johan Lyts	564	Python 2	2021-10-22 20:57:50

#	User	Length	Language	Date
1	Benjamin Z White	256	Python 3	2023-07-13 10:14:27
2	Paul Wild	361	Python 3	2023-04-01 00:03:23
3	Oskar Haarklou Veileborg	367	Python 3	2021-10-26 12:07:13
4	Arnav Sastry	375	Python 3	2023-11-05 16:38:39
5	Hrant Hovhannisyan	468	Python 3	2025-07-08 08:58:31
6	ALPHONSE DESIRE JUNIOR ENAMA	523	Python 3	2025-04-21 00:08:07
7	Dilhan Salgado	596	Python 3	2025-11-20 21:19:34
8	Ryan Tan	597	Python 3	2023-04-20 14:46:02
9	Franklin Davy KAMGA CHEUKO	630	Python 3	2025-04-20 23:13:02
10	Christofer Ohlsson	634	Python 3	2021-10-24 11:33:21

#	User	Length	Language	Date
1	Thomas Feld	176	Ruby	2025-08-25 12:59:09

#	User	Length	Language	Date
1	Jakob Rødal Skaar	1798	Rust	2025-11-19 17:44:49

Solution running time distribution