Problem A
Graduation — Problem Statistics

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Submissions	2441
Accepted submissions	2259
Submission ratio	92.54%
Authors	1114
Full solves [?]	932
Full solve Ratio	83.66%

#	User	Score	Language	Date
1	SpeedySebas	100	Ada	2025-01-22 15:58:12

#	User	Score	Language	Date
1	Julien	100	Dart	2023-06-07 14:20:15

#	User	Score	Language	Date
1	Jacob Harris Cryer Kragh	100	F#	2022-10-29 17:26:54
2	Hidden user	100	F#	2023-06-08 11:02:44
3	Emil Boesgaard Nørbjerg	100	F#	2024-02-09 18:03:16
4	Line Præstegaard	100	F#	2026-02-13 18:12:31

#	User	Score	Language	Date
1	Marcin Dudek	100	Go	2020-12-05 13:14:35
2	Marcin Dudek	100	Go	2020-12-07 08:38:20
3	Ian Howell	100	Go	2021-01-15 00:18:08
4	Norbert Voelker	100	Go	2021-04-27 19:10:28
5	Andreas Wachs	100	Go	2024-02-09 18:10:08
6	Isak Ahlberg	65	Go	2020-11-18 09:56:49

#	User	Score	Language	Date
1	Carl Sundvall	100	JavaScript (Node.js)	2018-11-29 22:48:39
2	Chris Wong	100	JavaScript (Node.js)	2021-03-12 00:49:52
3	Jun Hui Sim	100	JavaScript (Node.js)	2021-10-12 18:53:54
4	Samuel Högfeldt	100	JavaScript (Node.js)	2022-06-18 17:31:34
5	Minh Trang Nguyen	100	JavaScript (Node.js)	2026-01-09 22:09:11
6	Bas Dirks	0	JavaScript (Node.js)	2022-01-06 13:29:43

#	User	Score	Language	Date
1	Bjørn Chr. Soltvedt	100	JavaScript (SpiderMonkey)	2020-12-08 06:39:19
2	Peter Menyes	100	JavaScript (SpiderMonkey)	2021-09-24 15:34:17
3	Christian Pilegaard Cederquist	100	JavaScript (SpiderMonkey)	2023-01-27 23:22:17
4	Jose Villegas	100	JavaScript (SpiderMonkey)	2025-02-10 02:50:37
5	Jimmy Gustafsson	100	JavaScript (SpiderMonkey)	2025-07-31 23:21:09

#	User	Score	Language	Date
1	Vahagn Altunyan	100	Julia	2024-05-01 14:18:13
2	Timothy Gaede	100	Julia	2024-05-31 03:40:33

#	User	Score	Language	Date
1	Roger Bongers	100	Kotlin	2021-06-27 15:42:44
2	Jacob Huebner	100	Kotlin	2021-10-16 01:51:41
3	Sam Keyser	100	Kotlin	2022-07-24 21:31:24
4	Adam Rankin	100	Kotlin	2023-09-16 03:14:49

#	User	Score	Language	Date
1	Hidden user	100	Lua	2026-01-26 16:23:42

#	User	Score	Language	Date
1	Hidden user	100	OCaml	2020-12-10 17:27:22

#	User	Score	Language	Date
1	Ingemar Ragnemalm	100	Pascal	2022-05-03 13:34:45

#	User	Score	Language	Date
1	Mateusz Drwal	100	Python 2	2018-11-29 21:38:20
2	Lars Åström	100	Python 2	2018-11-30 00:00:35
3	Hugo Eberhard	100	Python 2	2018-12-01 10:29:16
4	Yanmarshus Bachtiar	100	Python 2	2020-12-08 06:35:37
5	Thomas Feld	100	Python 2	2020-12-11 14:57:26
6	Johan Lyts	100	Python 2	2021-01-12 21:36:52
7	Andreas Björklund	100	Python 2	2021-04-05 15:40:45
8	Hasan Kalzi	100	Python 2	2021-04-06 12:02:11
9	Andrei Stoica	100	Python 2	2021-09-17 21:22:05
10	Phung Dang Trinh (FUG CT)	0	Python 2	2023-02-12 07:09:09

#	User	Score	Language	Date
1	Hugo Winbladh	100	Ruby	2018-11-30 22:37:03
2	Kok Dith	100	Ruby	2021-08-24 04:20:55
3	Natanael Lundberg	100	Ruby	2022-11-07 19:24:19
4	Miorel Palii	100	Ruby	2023-01-07 08:23:51
5	Thomas Feld	100	Ruby	2023-02-13 09:53:13

#	User	Score	Language	Date
1	Danial Haseeb	100	Swift	2023-09-30 07:16:07

#	User	Runtime	Language	Date
1	SpeedySebas	0.01 s	Ada	2025-01-22 15:58:12

#	User	Runtime	Language	Date
1	PhilCampbell	0.00 s	C	2021-01-22 13:40:42
2	Mikael K Eriksson	0.00 s	C	2021-01-25 14:17:39
3	Andrew Jones	0.00 s	C	2022-01-02 01:23:19
4	Oscar Brink	0.00 s	C	2023-10-29 08:40:22
5	Kasper Malmborg Rønne	0.00 s	C	2024-06-18 16:23:21
6	Johannes Gustav Kron	0.01 s	C	2018-11-30 14:12:02
7	Sambit Palit	0.01 s	C	2020-12-10 22:02:00
8	Bergur Snorrason	0.01 s	C	2020-12-18 13:01:51
9	Martin Stensgård	0.01 s	C	2023-11-26 01:17:14
10	Simon Renhult	0.01 s	C	2024-02-20 19:04:01

#	User	Runtime	Language	Date
1	RollingThunder8492	0.03 s	C#	2022-03-16 05:53:57
2	Oskar Smedenmark	0.03 s	C#	2022-07-26 12:17:52
3	Jacob Nicholas Beland	0.04 s	C#	2022-01-03 19:23:06
4	Göran Andersson	0.04 s	C#	2022-05-18 00:43:44
5	Leslie Yip	0.04 s	C#	2022-09-10 14:22:42
6	Stoffe Malmberg	0.04 s	C#	2022-12-16 12:02:02
7	James Gen Li	0.05 s	C#	2020-12-05 07:55:04
8	Victor Hultén Mattsson	0.05 s	C#	2021-06-15 17:21:57
9	Adam Grady	0.05 s	C#	2021-11-09 15:28:56
10	Markus Swift	0.06 s	C#	2018-11-29 21:38:41

#	User	Runtime	Language	Date
1	Julien	1.26 s	Dart	2023-06-07 14:20:15

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.06 s	F#	2022-10-29 17:26:54
2	Hidden user	0.09 s	F#	2023-06-08 11:02:44
3	Line Præstegaard	0.11 s	F#	2026-02-13 18:12:31
4	Emil Boesgaard Nørbjerg	2.00 s	F#	2024-02-09 18:03:16

#	User	Runtime	Language	Date
1	Andreas Wachs	0.02 s	Go	2024-02-09 18:10:08
2	Marcin Dudek	0.08 s	Go	2020-12-05 13:14:35
3	Marcin Dudek	0.09 s	Go	2020-12-07 08:38:20
4	Norbert Voelker	0.11 s	Go	2021-04-27 19:10:28
5	Ian Howell	0.83 s	Go	2021-01-15 00:18:08

#	User	Runtime	Language	Date
1	Christian Leipe	0.01 s	Haskell	2022-01-10 09:42:41
2	Steinar Simonnes	0.03 s	Haskell	2024-03-29 12:36:41
3	Hidden user	0.06 s	Haskell	2022-04-03 14:27:16
4	Brent Yorgey	0.08 s	Haskell	2020-12-06 22:52:03
5	Ng Tek In	0.10 s	Haskell	2022-08-18 17:29:35
6	Patrick Bahr	0.11 s	Haskell	2024-02-09 17:39:27
7	Zach Tschetter	0.14 s	Haskell	2021-05-20 17:08:17
8	Fabian Mitterwallner	0.15 s	Haskell	2025-07-31 00:58:32
9	Jan Hrček	0.16 s	Haskell	2021-03-09 15:21:28
10	Gavin Dunlap	0.17 s	Haskell	2025-11-06 04:28:01

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.08 s	Java	2022-02-18 16:16:59
2	Emil Bak-Møller	0.09 s	Java	2021-02-16 01:39:06
3	Crystal Sharpe	0.12 s	Java	2020-12-06 16:13:32
4	Bjørn Dons	0.12 s	Java	2020-12-10 21:00:13
5	Zhu Xiaochen	0.12 s	Java	2021-05-09 03:25:32
6	Dhiraputta Pathama Tengara	0.12 s	Java	2023-09-16 15:32:39
7	Hidden user	0.12 s	Java	2025-02-03 18:57:08
8	Anurag Datta	0.12 s	Java	2026-01-12 13:26:26
9	Villads Aagaard Kusk	0.12 s	Java	2026-01-29 08:56:28
10	Kevin Lim Yong Shen	0.13 s	Java	2021-01-02 17:01:24

#	User	Runtime	Language	Date
1	Minh Trang Nguyen	0.10 s	JavaScript (Node.js)	2026-01-09 22:09:11
2	Samuel Högfeldt	0.11 s	JavaScript (Node.js)	2022-06-18 17:31:34
3	Jun Hui Sim	0.46 s	JavaScript (Node.js)	2021-10-12 18:53:54
4	Chris Wong	0.48 s	JavaScript (Node.js)	2021-03-12 00:49:52
5	Carl Sundvall	0.70 s	JavaScript (Node.js)	2018-11-29 22:48:39

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.08 s	JavaScript (SpiderMonkey)	2020-12-08 06:39:19
2	Jose Villegas	0.08 s	JavaScript (SpiderMonkey)	2025-02-10 02:50:37
3	Christian Pilegaard Cederquist	0.09 s	JavaScript (SpiderMonkey)	2023-01-27 23:22:17
4	Peter Menyes	0.11 s	JavaScript (SpiderMonkey)	2021-09-24 16:27:38
5	Jimmy Gustafsson	0.12 s	JavaScript (SpiderMonkey)	2025-07-31 23:21:09

#	User	Runtime	Language	Date
1	Timothy Gaede	0.88 s	Julia	2024-05-31 03:40:33
2	Vahagn Altunyan	1.36 s	Julia	2024-05-01 14:18:13

#	User	Runtime	Language	Date
1	Jacob Huebner	0.17 s	Kotlin	2021-10-16 01:51:41
2	Sam Keyser	0.23 s	Kotlin	2022-07-24 21:31:24
3	Adam Rankin	0.34 s	Kotlin	2023-09-16 03:14:49
4	Roger Bongers	0.36 s	Kotlin	2021-06-27 15:57:27

#	User	Runtime	Language	Date
1	Hidden user	0.71 s	Lua	2026-01-26 16:23:42

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	OCaml	2020-12-10 17:27:22

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.01 s	Pascal	2022-05-03 13:34:45

#	User	Runtime	Language	Date
1	Lars Åström	0.05 s	Python 2	2018-11-30 00:00:35
2	Yanmarshus Bachtiar	0.05 s	Python 2	2020-12-08 06:35:37
3	Hasan Kalzi	0.05 s	Python 2	2021-04-06 12:29:30
4	Andrei Stoica	0.05 s	Python 2	2021-09-17 21:22:05
5	Johan Lyts	0.06 s	Python 2	2021-01-12 21:36:52
6	Mateusz Drwal	0.07 s	Python 2	2018-11-29 21:38:20
7	Hugo Eberhard	0.08 s	Python 2	2018-12-01 10:29:16
8	Thomas Feld	0.09 s	Python 2	2020-12-11 14:57:26
9	Andreas Björklund	0.10 s	Python 2	2021-04-05 15:40:45

#	User	Runtime	Language	Date
1	Nils Gustafsson	0.04 s	Python 3	2018-12-04 00:17:43
2	Petr	0.05 s	Python 3	2022-07-02 22:05:48
3	Hidden user	0.05 s	Python 3	2026-02-15 11:59:41
4	Alex Novikov	0.06 s	Python 3	2021-01-19 01:14:46
5	Henrik Hallbert	0.06 s	Python 3	2022-02-14 13:30:22
6	Ram Basnet	0.06 s	Python 3	2022-10-11 06:52:58
7	Hidden user	0.06 s	Python 3	2023-01-25 08:19:27
8	Charlot DEDJINOU	0.06 s	Python 3	2023-09-04 18:23:27
9	Nicolai Robinson	0.06 s	Python 3	2024-02-09 17:02:30
10	Ole Vik Lysne	0.06 s	Python 3	2024-08-30 13:10:29

#	User	Runtime	Language	Date
1	Thomas Feld	0.22 s	Ruby	2023-02-13 09:53:13
2	Kok Dith	0.24 s	Ruby	2021-08-24 04:20:55
3	Hugo Winbladh	0.27 s	Ruby	2018-11-30 22:37:03
4	Natanael Lundberg	0.30 s	Ruby	2022-11-07 19:24:19
5	Miorel Palii	1.86 s	Ruby	2023-01-07 08:23:51

#	User	Runtime	Language	Date
1	Martin Söderman	0.00 s	Rust	2018-12-01 16:18:32
2	Quentin Aubecq	0.00 s	Rust	2024-10-18 08:55:21
3	Vincent Lagerros	0.00 s	Rust	2025-01-18 20:52:43
4	Eric Pinter	0.01 s	Rust	2021-05-17 22:01:04
5	Anton Golov	0.01 s	Rust	2021-10-25 15:32:07
6	Bas Dirks	0.01 s	Rust	2022-06-21 04:28:57
7	Erik Magnusson	0.01 s	Rust	2024-01-31 10:58:36
8	Hugo Lom	0.01 s	Rust	2024-02-20 18:48:10
9	Freek van Keulen	0.02 s	Rust	2021-12-19 12:49:43
10	Egor Kulikov	0.02 s	Rust	2025-03-18 09:09:17

#	User	Runtime	Language	Date
1	Danial Haseeb	0.05 s	Swift	2023-09-30 07:16:07

#	User	Length	Language	Date
1	SpeedySebas	2767	Ada	2025-01-22 15:58:12

#	User	Length	Language	Date
1	Axel Svensson	799	C	2022-06-15 16:28:50
2	Mikael K Eriksson	867	C	2021-01-25 14:17:39
3	PhilCampbell	878	C	2021-01-22 13:40:42
4	Mirel Cosulschi	916	C	2024-08-28 19:28:19
5	Simon Renhult	1018	C	2024-02-20 19:04:01
6	Sebastien Boatwright	1102	C	2025-04-25 21:04:58
7	Kasper Malmborg Rønne	1115	C	2024-06-18 16:23:21
8	Sambit Palit	1376	C	2020-12-10 22:02:00
9	Martin Stensgård	1494	C	2023-11-26 01:17:14
10	Michael Thames	1672	C	2024-05-03 02:51:52

#	User	Length	Language	Date
1	traxex	588	C#	2024-05-26 17:09:16
2	Göran Andersson	1140	C#	2022-05-18 00:43:44
3	Stoffe Malmberg	1180	C#	2022-12-16 12:02:02
4	Adam Grady	1251	C#	2021-11-09 15:28:56
5	Niklas Sandén	1254	C#	2018-11-29 21:19:19
6	Leslie Yip	1266	C#	2022-09-10 14:22:42
7	Ibrahim Abdulhussein	1651	C#	2018-11-30 17:08:56
8	Rogerio Prudente dos Santos	1793	C#	2020-12-05 22:29:24
9	Eric Weiss	2013	C#	2022-09-12 19:14:31
10	Oskar Smedenmark	2014	C#	2022-07-26 12:19:40

#	User	Length	Language	Date
1	Jerome Leow	455	C++	2021-01-09 13:35:36
2	Ahmad Dzuizz Annajib	521	C++	2022-07-04 12:45:53
3	Tan Wei Xin	593	C++	2021-01-01 03:30:26
4	Simone Moretti	604	C++	2023-03-06 09:26:22
5	Dmitry Lyubshin	627	C++	2023-03-21 03:23:05
6	陳心誠	627	C++	2024-07-18 13:18:30
7	Geordie Taber	628	C++	2023-11-04 04:45:26
8	Sophie Zeihen	629	C++	2025-07-30 14:20:59
9	Elias Lolck	637	C++	2024-02-09 16:19:29
10	bekarhunmain	640	C++	2024-06-15 18:26:24

#	User	Length	Language	Date
1	Julien	1771	Dart	2023-06-07 14:20:15

#	User	Length	Language	Date
1	Hidden user	943	F#	2023-06-08 11:02:44
2	Jacob Harris Cryer Kragh	1542	F#	2022-10-29 17:26:54
3	Line Præstegaard	3154	F#	2026-02-13 18:12:31
4	Emil Boesgaard Nørbjerg	3296	F#	2024-02-09 18:03:16

#	User	Length	Language	Date
1	Marcin Dudek	727	Go	2020-12-05 13:14:35
2	Marcin Dudek	926	Go	2020-12-07 08:38:20
3	Ian Howell	1327	Go	2021-01-15 00:18:08
4	Norbert Voelker	1683	Go	2021-04-27 19:10:28
5	Andreas Wachs	2282	Go	2024-02-09 18:10:08

#	User	Length	Language	Date
1	Fabian Mitterwallner	702	Haskell	2025-07-31 01:15:06
2	Ng Tek In	735	Haskell	2022-08-18 17:29:35
3	Zach Tschetter	753	Haskell	2021-05-20 17:08:17
4	Christian Leipe	946	Haskell	2022-01-09 13:19:04
5	Chan Ken	948	Haskell	2021-08-15 07:51:43
6	Tim Put	986	Haskell	2021-05-16 07:22:50
7	Gavin Dunlap	1259	Haskell	2025-11-06 04:28:01
8	Hidden user	1583	Haskell	2022-04-03 14:49:12
9	Steinar Simonnes	2845	Haskell	2024-03-29 12:38:07
10	Jan Hrček	3551	Haskell	2021-03-09 15:21:28

#	User	Length	Language	Date
1	Eric Leow Yu Quan	734	Java	2020-12-15 04:45:03
2	Oliver Flinck Sheye	802	Java	2025-02-01 15:07:50
3	Isaac Sun	825	Java	2023-12-13 15:16:27
4	Marshall D Feng	962	Java	2022-03-28 03:45:40
5	William Beard	982	Java	2021-04-17 05:24:45
6	Anton Sandin	989	Java	2022-04-19 22:10:14
7	Niklas Enberg	995	Java	2022-03-10 10:35:15
8	Gautham Sundaram	1078	Java	2021-07-10 08:32:07
9	Frederick Pek	1170	Java	2021-03-20 10:53:47
10	Dhiraputta Pathama Tengara	1181	Java	2023-08-20 11:11:59

#	User	Length	Language	Date
1	Jun Hui Sim	1577	JavaScript (Node.js)	2021-10-12 18:53:54
2	Samuel Högfeldt	1620	JavaScript (Node.js)	2022-06-18 17:31:34
3	Chris Wong	1694	JavaScript (Node.js)	2021-03-12 00:49:52
4	Minh Trang Nguyen	1863	JavaScript (Node.js)	2026-01-09 22:09:11
5	Carl Sundvall	1996	JavaScript (Node.js)	2018-11-29 22:48:39

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	527	JavaScript (SpiderMonkey)	2020-12-08 06:39:19
2	Christian Pilegaard Cederquist	601	JavaScript (SpiderMonkey)	2023-01-27 23:22:17
3	Jimmy Gustafsson	645	JavaScript (SpiderMonkey)	2025-07-31 23:21:09
4	Peter Menyes	915	JavaScript (SpiderMonkey)	2021-09-24 15:34:17
5	Jose Villegas	1170	JavaScript (SpiderMonkey)	2025-02-10 02:50:37

#	User	Length	Language	Date
1	Vahagn Altunyan	757	Julia	2024-05-01 14:18:13
2	Timothy Gaede	2029	Julia	2024-05-31 03:40:33

#	User	Length	Language	Date
1	Roger Bongers	854	Kotlin	2021-06-27 15:42:44
2	Sam Keyser	1086	Kotlin	2022-07-24 21:35:21
3	Adam Rankin	1286	Kotlin	2023-09-16 03:14:49
4	Jacob Huebner	1934	Kotlin	2021-10-16 01:51:41

#	User	Length	Language	Date
1	Hidden user	2943	Lua	2026-01-26 16:23:42

#	User	Length	Language	Date
1	Hidden user	759	OCaml	2020-12-10 17:43:53

#	User	Length	Language	Date
1	Ingemar Ragnemalm	697	Pascal	2022-05-03 13:34:45

#	User	Length	Language	Date
1	Thomas Feld	219	Python 2	2020-12-11 14:57:26
2	Johan Lyts	406	Python 2	2021-01-12 21:36:52
3	Andrei Stoica	500	Python 2	2021-09-17 21:22:05
4	Andreas Björklund	533	Python 2	2021-04-05 15:40:45
5	Hasan Kalzi	628	Python 2	2021-04-06 12:02:11
6	Lars Åström	646	Python 2	2018-11-30 00:00:35
7	Hugo Eberhard	692	Python 2	2018-12-01 10:29:16
8	Yanmarshus Bachtiar	824	Python 2	2020-12-08 06:35:37
9	Mateusz Drwal	1066	Python 2	2018-11-29 21:38:20

#	User	Length	Language	Date
1	Nils Gustafsson	113	Python 3	2018-12-04 01:35:10
2	Wouter Dijkstra	141	Python 3	2022-06-24 20:31:21
3	Gustav Wass	147	Python 3	2025-01-31 10:58:15
4	Kenneth Jensen	198	Python 3	2021-07-20 18:20:40
5	Yong Mao	199	Python 3	2023-02-07 17:07:38
6	Ahmed Chamseddine	211	Python 3	2024-09-03 11:29:15
7	Petr	225	Python 3	2022-07-02 21:58:55
8	Charles Ancheta	266	Python 3	2023-05-07 12:54:05
9	Ole Vik Lysne	278	Python 3	2024-08-30 13:10:29
10	Jared Liw Zhi Long	288	Python 3	2021-06-27 03:25:26

#	User	Length	Language	Date
1	Thomas Feld	66	Ruby	2023-02-13 09:53:13
2	Hugo Winbladh	519	Ruby	2018-11-30 22:37:03
3	Kok Dith	590	Ruby	2021-08-24 04:20:55
4	Natanael Lundberg	592	Ruby	2022-11-07 19:24:19
5	Miorel Palii	748	Ruby	2023-01-07 08:23:51

#	User	Length	Language	Date
1	Hugo Lom	1233	Rust	2024-02-20 18:48:10
2	Martin Söderman	1267	Rust	2018-12-01 16:18:32
3	Quentin Aubecq	1378	Rust	2024-10-18 08:55:21
4	Oscar Ulriksen	1501	Rust	2022-11-15 16:52:19
5	Anton Golov	1748	Rust	2021-10-25 15:32:07
6	Freek van Keulen	1814	Rust	2021-12-19 12:49:43
7	Eric Pinter	1851	Rust	2021-05-17 22:01:04
8	Heng Ly	2090	Rust	2023-04-03 14:40:52
9	Bas Dirks	2454	Rust	2022-06-21 04:28:57
10	Mathias Veimoen	2964	Rust	2025-07-20 15:48:09

#	User	Length	Language	Date
1	Danial Haseeb	821	Swift	2023-09-30 07:16:07

Solution running time distribution