Problem I
Stacking Cups — Problem Statistics

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Submissions	10907
Accepted submissions	6197
Submission ratio	56.82%
Authors	5725
Full solves [?]	5425
Full solve Ratio	94.76%

#	User	Runtime	Language	Date
1	Danny Robinson	0.01 s	Bash	2023-09-12 07:32:59
2	Thomas Feld	0.01 s	Bash	2023-09-12 08:54:54
3	Chenzhang Hu	0.08 s	Bash	2024-06-29 18:57:16

#	User	Runtime	Language	Date
1	Duelene Olson	0.02 s	C#	2016-10-31 20:52:51
2	Rail Sabirov	0.02 s	C#	2016-11-05 14:30:56
3	Bryan Shiffman	0.02 s	C#	2016-11-05 14:38:01
4	Dawid Cech	0.02 s	C#	2016-11-05 14:42:20
5	Baranov, Eugene	0.02 s	C#	2016-11-05 14:44:48
6	Marcin Dudek	0.02 s	C#	2016-11-05 14:47:15
7	Yogin Patel	0.02 s	C#	2016-11-05 14:54:37
8	Piotr Karpala	0.02 s	C#	2016-11-05 15:02:02
9	Gregory Roderick	0.02 s	C#	2016-11-05 15:09:49
10	Mike Spendlove	0.02 s	C#	2016-11-05 16:52:41

#	User	Runtime	Language	Date
1	wibi	0.01 s	Common Lisp	2020-08-20 18:39:42
2	Hidden user	0.02 s	Common Lisp	2019-01-02 01:37:25
3	David Cawthon	0.02 s	Common Lisp	2019-04-25 04:06:21

#	User	Runtime	Language	Date
1	Patrick Bahr	0.05 s	F#	2021-02-14 22:34:46
2	Jacob Harris Cryer Kragh	0.05 s	F#	2022-07-11 12:29:30

#	User	Runtime	Language	Date
1	Jimmy Nejtron	0.00 s	Go	2023-09-19 08:42:32
2	Kiki Ibrahim	0.00 s	Go	2024-08-10 16:02:20
3	Zachary Short	0.00 s	Go	2025-11-18 23:26:38
4	oliyad tesfaye	0.02 s	Go	2022-07-22 19:23:41
5	Ross O'Sullivan	0.07 s	Go	2018-08-07 22:18:35
6	Akhikumar Indurti	0.07 s	Go	2018-10-04 02:43:08
7	Hidden user	0.07 s	Go	2018-10-15 19:39:47
8	Bashayer Hijji	0.07 s	Go	2019-01-28 16:48:42
9	Krzysztof Gibuła	0.07 s	Go	2019-02-18 13:06:45
10	Markus Takalo	0.07 s	Go	2019-04-09 20:35:54

#	User	Runtime	Language	Date
1	Lakhani Paarth	0.05 s	Java	2016-10-29 19:21:31
2	Nick Wu	0.05 s	Java	2016-10-29 22:02:58
3	James Black	0.05 s	Java	2016-10-30 17:56:51
4	John Harrison	0.05 s	Java	2016-10-31 18:09:51
5	Michel Langeveld	0.05 s	Java	2016-10-31 20:52:47
6	Daniel Angulo Sanchez	0.05 s	Java	2016-11-01 02:11:56
7	Micah Stairs	0.05 s	Java	2016-11-01 18:09:29
8	Lozzi Ali	0.05 s	Java	2016-11-01 23:34:39
9	Mouhssine Assaoud	0.05 s	Java	2016-11-06 21:18:10
10	Sherida van den Bent	0.05 s	Java	2016-11-09 14:26:24

#	User	Runtime	Language	Date
1	Hidden user	0.04 s	JavaScript (Node.js)	2024-09-06 19:22:45
2	Daniel Abdelsamed	0.05 s	JavaScript (Node.js)	2018-09-20 02:20:13
3	Carl Sundvall	0.05 s	JavaScript (Node.js)	2018-11-12 13:36:19
4	Yonah Karp	0.05 s	JavaScript (Node.js)	2018-12-27 18:47:54
5	Jordan Manley	0.05 s	JavaScript (Node.js)	2018-12-27 18:54:47
6	Joel Szegedin	0.05 s	JavaScript (Node.js)	2018-12-27 18:57:54
7	Gurpartap Singh Bhatti	0.05 s	JavaScript (Node.js)	2019-02-18 01:05:05
8	Sander Hellesø	0.05 s	JavaScript (Node.js)	2019-04-16 04:02:55
9	Hans Bjerndell	0.05 s	JavaScript (Node.js)	2019-06-13 00:10:08
10	Hidden user	0.05 s	JavaScript (Node.js)	2019-06-24 11:40:16

#	User	Runtime	Language	Date
1	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2016-10-29 18:50:33
2	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-10-29 20:10:49
3	Tor Nordqvist	0.01 s	JavaScript (SpiderMonkey)	2016-11-05 22:27:35
4	J M	0.01 s	JavaScript (SpiderMonkey)	2016-11-12 16:14:37
5	Ionel Hindorean	0.01 s	JavaScript (SpiderMonkey)	2016-11-25 21:28:35
6	Magnar Myrtveit	0.01 s	JavaScript (SpiderMonkey)	2016-12-23 21:20:45
7	Geir Magne Karlsen	0.01 s	JavaScript (SpiderMonkey)	2017-01-18 00:38:21
8	Sam Bautista	0.01 s	JavaScript (SpiderMonkey)	2017-01-28 08:34:23
9	Friðjón Guðjohnsen	0.01 s	JavaScript (SpiderMonkey)	2017-02-09 22:07:32
10	Spencer Smith	0.01 s	JavaScript (SpiderMonkey)	2017-06-06 23:13:11

#	User	Runtime	Language	Date
1	Danny Robinson	0.70 s	Julia	2023-06-21 16:49:46
2	Timothy Gaede	0.73 s	Julia	2024-03-20 12:50:35

#	User	Runtime	Language	Date
1	Jacob Huebner	0.12 s	Kotlin	2021-06-06 07:14:57
2	Björn Holm	0.18 s	Kotlin	2019-10-08 18:16:43
3	Dayan Ruben Gonzalez	0.18 s	Kotlin	2020-09-30 17:41:37
4	Jahid Hasan Imon	0.19 s	Kotlin	2020-05-08 14:19:43
5	Magnus Wass	0.19 s	Kotlin	2020-12-18 20:20:30
6	Kyle Laker	0.20 s	Kotlin	2018-01-16 23:01:18
7	Jacob Stringer	0.20 s	Kotlin	2018-05-15 03:16:25
8	Mohsen Dehbashi	0.20 s	Kotlin	2019-07-06 09:37:03
9	Dmitry Shostak	0.21 s	Kotlin	2018-08-18 16:48:15
10	Neil Harmon	0.21 s	Kotlin	2019-04-03 15:43:30

#	User	Runtime	Language	Date
1	Fredrik Eriksson	0.00 s	OCaml	2024-10-23 00:22:24

#	User	Runtime	Language	Date
1	Hidden user	0.00 s	Odin	2025-05-09 00:57:29

#	User	Runtime	Language	Date
1	David Connolly	0.00 s	Pascal	2017-08-18 12:58:12
2	Ingemar Ragnemalm	0.00 s	Pascal	2017-08-28 16:14:25
3	Huỳnh Minh Lâm	0.00 s	Pascal	2023-01-05 16:19:30

#	User	Runtime	Language	Date
1	Ali Pandidan	0.01 s	PHP	2016-11-11 17:08:12
2	Steven D. Wilson	0.01 s	PHP	2016-11-14 16:22:59
3	Ibraheem Ghabash	0.01 s	PHP	2017-01-29 09:48:16
4	Erwin Merioles	0.01 s	PHP	2017-02-23 16:07:25
5	George Broadley	0.01 s	PHP	2017-03-02 01:41:05
6	Milton Blaesild	0.01 s	PHP	2019-03-14 13:59:16
7	Jonas Lindenskov Nielsen	0.01 s	PHP	2019-09-14 23:44:59
8	Renate Fiala-Lundström	0.01 s	PHP	2021-06-02 00:07:21
9	Andre Wahyudi	0.01 s	PHP	2022-10-21 09:43:44

#	User	Runtime	Language	Date
1	Hadi Qovaizi	0.01 s	Prolog	2016-12-14 01:50:30
2	Hakan Kjellerstrand	0.02 s	Prolog	2023-01-31 07:39:48

#	User	Runtime	Language	Date
1	William Kelly	0.02 s	Python 2	2016-10-29 18:23:39
2	Hidden user	0.02 s	Python 2	2016-10-29 18:34:58
3	Bredyn McCombs	0.02 s	Python 2	2016-10-29 18:53:49
4	Christofer Ohlsson	0.02 s	Python 2	2016-10-29 21:31:03
5	Maksym Bendeberia	0.02 s	Python 2	2016-11-03 16:27:49
6	Marcus Johansson	0.02 s	Python 2	2016-11-19 18:09:54
7	Knut Anders Stokke	0.02 s	Python 2	2016-11-23 10:46:08
8	Christopher Boo	0.02 s	Python 2	2016-12-10 03:23:24
9	James Hamm	0.02 s	Python 2	2016-12-16 01:33:35
10	Matteo Piano	0.02 s	Python 2	2016-12-19 13:05:40

#	User	Runtime	Language	Date
1	Sage Smith	0.02 s	Python 3	2016-10-29 18:08:33
2	Kevin Gordon	0.02 s	Python 3	2016-10-29 18:11:44
3	Wen Li Looi	0.02 s	Python 3	2016-10-29 18:11:49
4	Caleb Jhones	0.02 s	Python 3	2016-10-29 18:12:34
5	Christian Lindeström	0.02 s	Python 3	2016-10-29 18:14:26
6	Christian Rachmaninoff	0.02 s	Python 3	2016-10-29 18:18:25
7	Jesse Farebrother	0.02 s	Python 3	2016-10-29 18:19:38
8	Michael Zhao	0.02 s	Python 3	2016-10-29 18:23:01
9	Tian Zhi Wang	0.02 s	Python 3	2016-10-29 18:31:58
10	Christopher Darcy	0.02 s	Python 3	2016-10-29 18:46:34

#	User	Runtime	Language	Date
1	Kellen Watt	0.03 s	Ruby	2016-10-29 19:56:29
2	Leonardo Brito	0.03 s	Ruby	2016-12-29 23:33:19
3	Kevin Suwala	0.03 s	Ruby	2017-01-07 01:26:56
4	Muzakhir Amanzholov	0.03 s	Ruby	2017-01-24 00:18:29
5	Niraj P	0.03 s	Ruby	2017-02-14 15:54:40
6	Martin Larsson	0.03 s	Ruby	2017-03-03 18:50:40
7	Clifford Owino	0.03 s	Ruby	2017-05-24 06:59:45
8	Casper Christensen	0.03 s	Ruby	2017-09-03 13:34:13
9	Paul Vinell	0.03 s	Ruby	2018-04-01 12:54:17
10	Jason Cheong-Kee-You	0.04 s	Ruby	2018-05-29 04:06:24

#	User	Length	Language	Date
1	Danny Robinson	55	Bash	2023-09-12 07:32:59
2	Chenzhang Hu	59	Bash	2025-09-13 03:11:53
3	Thomas Feld	63	Bash	2023-09-12 08:54:54

#	User	Length	Language	Date
1	Martin Blom	276	C	2023-10-18 14:58:15
2	Wesley Stephanak	491	C	2019-02-08 12:13:32
3	Johan Öhlin	492	C	2017-06-27 16:07:03
4	Mickael Torres	536	C	2018-04-22 15:13:19
5	Thibault Raffaillac	557	C	2017-01-30 18:19:56
6	Ximun Castoreo	629	C	2020-07-01 11:07:29
7	Anton Haglund	650	C	2016-11-15 22:52:41
8	Kalle Dackland	668	C	2018-05-05 12:23:39
9	Hidden user	699	C	2017-02-01 08:28:08
10	Seth Carter	701	C	2017-11-27 06:50:58

#	User	Length	Language	Date
1	Deci Bel	510	C#	2024-06-12 23:01:09
2	shanmuka rana prathap chowdary ponnaganti	547	C#	2023-10-30 01:19:52
3	Anthony Ye	548	C#	2023-07-09 18:46:14
4	Jyothi Venkata Naga Sai Kumar Maturi	559	C#	2023-10-29 19:14:07
5	Sravani Dondapati	562	C#	2023-10-27 18:54:55
6	bhanu prakash konda	584	C#	2023-10-25 04:13:34
7	Medha Alla	590	C#	2023-10-24 17:01:04
8	Krishnasai Chaluvadi	590	C#	2023-10-29 17:20:05
9	李陆屿	602	C#	2019-01-12 09:36:18
10	Max Enros	606	C#	2017-01-31 13:02:39

#	User	Length	Language	Date
1	Frans Meulenbroeks	254	C++	2024-10-28 23:08:20
2	Nigel Tan	311	C++	2020-08-31 11:48:24
3	Hidden user	321	C++	2017-07-31 18:47:04
4	Yeung Man Tsung	333	C++	2022-11-20 08:29:30
5	Aidan Smith	354	C++	2018-01-16 12:51:50
6	Marco Servin	362	C++	2020-06-30 20:35:50
7	Kasra Ghodsi	367	C++	2018-12-31 04:10:12
8	Bennett Lim	368	C++	2020-01-25 11:47:12
9	Dmytro Bilotserkovets	376	C++	2025-03-13 17:43:17
10	Rinzin Dorji	378	C++	2020-04-22 16:05:30

#	User	Length	Language	Date
1	wibi	261	Common Lisp	2020-08-20 18:39:42
2	David Cawthon	630	Common Lisp	2019-04-25 04:06:21
3	Hidden user	837	Common Lisp	2019-01-02 01:37:25

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	573	F#	2022-07-11 12:29:30
2	Patrick Bahr	1972	F#	2021-02-14 22:34:46

#	User	Length	Language	Date
1	Krzysztof Gibuła	602	Go	2019-02-18 13:06:45
2	Jimmy Nejtron	631	Go	2023-09-19 08:42:32
3	Carl Bruun	636	Go	2021-10-19 19:56:31
4	Hidden user	704	Go	2018-10-15 19:39:47
5	Hidden user	732	Go	2017-10-31 04:42:48
6	Akhikumar Indurti	733	Go	2018-10-04 02:43:08
7	Jonathan Rintala	773	Go	2019-07-27 22:43:53
8	Wojtek Bednarzak	788	Go	2018-04-30 16:33:40
9	Zachary Short	801	Go	2025-11-18 23:26:38
10	Brandon J	815	Go	2020-02-05 08:13:51

#	User	Length	Language	Date
1	Alex Marion	281	Haskell	2024-07-06 02:52:20
2	Freek van Keulen	306	Haskell	2021-02-13 14:15:21
3	Håkon Flatval	315	Haskell	2018-06-12 20:22:41
4	Morten Clausen	349	Haskell	2019-01-01 20:32:47
5	Alberto Cerezo Cid	350	Haskell	2017-03-10 09:32:04
6	Steinar Simonnes	351	Haskell	2024-01-19 09:57:19
7	Sebastian Banert	371	Haskell	2023-09-03 18:40:00
8	Christian Leipe	373	Haskell	2017-01-03 13:25:50
9	Brent Yorgey	379	Haskell	2017-10-02 17:12:54
10	Øyvind Almli	391	Haskell	2021-09-13 19:58:42

#	User	Length	Language	Date
1	Lena Ruiz	488	Java	2016-12-31 07:47:13
2	Samuel Klingström	503	Java	2017-02-28 23:18:06
3	Raymond Arrington	518	Java	2024-06-17 06:39:43
4	Nate Alden	533	Java	2020-01-19 04:31:11
5	Ali Pervaiz	537	Java	2019-03-19 20:27:59
6	Jason Liu	543	Java	2023-08-25 15:48:30
7	Dev Singh	544	Java	2018-02-01 02:39:38
8	Russell Rivard	556	Java	2022-02-17 15:31:15
9	Eric Leow Yu Quan	561	Java	2020-12-03 11:46:19
10	Mark van Helvoort	568	Java	2017-09-27 14:13:40

#	User	Length	Language	Date
1	Gurpartap Singh Bhatti	582	JavaScript (Node.js)	2019-02-18 01:05:05
2	Chris Wong	636	JavaScript (Node.js)	2021-02-02 15:46:00
3	Samarpan Dutta	650	JavaScript (Node.js)	2021-03-22 00:13:12
4	Aakash Shanavas	670	JavaScript (Node.js)	2021-03-23 03:49:12
5	Sivaramakrishna Allam	702	JavaScript (Node.js)	2021-03-23 01:45:37
6	Sana Barilide	727	JavaScript (Node.js)	2023-12-10 00:27:27
7	Devansh Guddeti	733	JavaScript (Node.js)	2021-03-22 23:42:43
8	Dheeraj Yerabati	733	JavaScript (Node.js)	2021-03-23 00:37:19
9	Yogitha Ramaraju	733	JavaScript (Node.js)	2021-03-23 02:19:23
10	Venkatesh Musku	733	JavaScript (Node.js)	2021-03-23 02:27:17

#	User	Length	Language	Date
1	Jimmy Gustafsson	154	JavaScript (SpiderMonkey)	2024-06-12 21:20:06
2	Christian Pilegaard Cederquist	155	JavaScript (SpiderMonkey)	2022-11-14 13:08:38
3	Evan Magill	238	JavaScript (SpiderMonkey)	2024-04-19 05:12:06
4	Bjørn Chr. Soltvedt	273	JavaScript (SpiderMonkey)	2016-10-29 20:10:49
5	Zach Tschetter	283	JavaScript (SpiderMonkey)	2023-05-28 22:52:41
6	Nguyễn Hùng Cường	302	JavaScript (SpiderMonkey)	2018-09-03 12:59:04
7	Tor Nordqvist	335	JavaScript (SpiderMonkey)	2016-11-05 22:27:35
8	Bernard Perrin	355	JavaScript (SpiderMonkey)	2019-03-11 22:49:06
9	Peter Kedemo	378	JavaScript (SpiderMonkey)	2016-10-29 18:50:33
10	J M	382	JavaScript (SpiderMonkey)	2016-11-12 16:14:37

#	User	Length	Language	Date
1	Danny Robinson	214	Julia	2023-06-21 16:49:46
2	Timothy Gaede	745	Julia	2024-03-20 12:50:35

#	User	Length	Language	Date
1	Troy Warmboe	436	Kotlin	2020-02-07 22:02:26
2	Dayan Ruben Gonzalez	447	Kotlin	2020-09-30 17:41:37
3	Magnus Wass	447	Kotlin	2020-12-18 20:20:30
4	Aleksander	471	Kotlin	2023-12-27 21:03:38
5	axl	473	Kotlin	2019-08-05 12:38:39
6	Adam Rankin	475	Kotlin	2023-05-03 22:22:56
7	Kyle Laker	491	Kotlin	2018-01-16 23:01:18
8	Dmitry Shostak	519	Kotlin	2018-08-18 16:48:15
9	Zaw Myat	525	Kotlin	2024-01-28 10:08:30
10	Mohsen Dehbashi	564	Kotlin	2019-07-06 09:39:23

#	User	Length	Language	Date
1	Fredrik Eriksson	414	OCaml	2024-10-23 00:22:24

#	User	Length	Language	Date
1	Hidden user	975	Odin	2025-05-09 00:57:29

#	User	Length	Language	Date
1	David Connolly	1007	Pascal	2017-08-18 12:58:12
2	Ingemar Ragnemalm	1975	Pascal	2017-08-28 16:14:25
3	Huỳnh Minh Lâm	3450	Pascal	2023-01-05 16:19:30

#	User	Length	Language	Date
1	Ibraheem Ghabash	313	PHP	2017-01-29 09:48:16
2	Ali Pandidan	319	PHP	2016-11-11 17:08:12
3	Erwin Merioles	367	PHP	2017-02-23 16:07:25
4	Renate Fiala-Lundström	484	PHP	2021-06-02 00:07:21
5	Jonas Lindenskov Nielsen	521	PHP	2019-09-14 23:44:59
6	George Broadley	522	PHP	2017-03-02 01:41:05
7	Steven D. Wilson	547	PHP	2016-11-14 16:22:59
8	Andre Wahyudi	783	PHP	2022-10-21 09:43:44
9	Milton Blaesild	831	PHP	2019-03-14 13:59:16

#	User	Length	Language	Date
1	Hakan Kjellerstrand	388	Prolog	2023-01-31 07:39:48
2	Hadi Qovaizi	6876	Prolog	2016-12-14 01:50:30

#	User	Length	Language	Date
1	Thomas Feld	152	Python 2	2019-08-19 13:06:46
2	Lars Åström	177	Python 2	2018-11-22 22:32:30
3	Guan Yang Ze	192	Python 2	2019-09-05 15:28:21
4	Johan Wind	198	Python 2	2017-06-04 00:46:23
5	Kuan Wei Heng	202	Python 2	2018-12-01 16:54:41
6	Wendirad Demelash	202	Python 2	2019-05-14 11:05:39
7	Conor McCauley	203	Python 2	2019-03-20 07:06:13
8	Hasan Ramezani	210	Python 2	2016-10-29 20:13:16
9	Jonatan Nilsson	213	Python 2	2019-05-12 13:21:10
10	Johann Ly	215	Python 2	2018-03-10 07:47:57

#	User	Length	Language	Date
1	Clement Oh	109	Python 3	2023-05-28 19:53:45
2	Karel Tutsu	140	Python 3	2022-11-24 08:32:46
3	JY Loh	145	Python 3	2022-11-05 14:07:48
4	Marcus Xu	152	Python 3	2021-12-16 17:08:49
5	Thomas Vu	156	Python 3	2019-01-23 10:30:35
6	Tai Tze Kin	162	Python 3	2024-05-01 17:04:07
7	Kevin Mugianto	166	Python 3	2018-07-31 13:56:46
8	Asger Hautop Drewsen	168	Python 3	2017-02-24 14:25:55
9	Ahmed Chamseddine	170	Python 3	2023-09-15 15:30:08
10	Desireddyguru Vishnuvardhanreddy	171	Python 3	2017-04-24 08:31:46

#	User	Length	Language	Date
1	Chenzhang Hu	63	Ruby	2024-06-29 19:13:23
2	Thomas Feld	71	Ruby	2023-01-11 10:50:35
3	Clement Oh	133	Ruby	2023-12-08 17:28:49
4	Hidden user	175	Ruby	2018-10-14 19:07:39
5	Hidden user	197	Ruby	2019-02-17 02:34:25
6	Casper Christensen	203	Ruby	2017-09-03 13:34:13
7	Eugen Neagoe	208	Ruby	2026-02-12 16:46:33
8	Clifford Owino	224	Ruby	2017-05-24 06:59:45
9	Niraj P	240	Ruby	2017-02-14 15:54:40
10	Nicholas Lantz	241	Ruby	2019-08-02 00:43:25

#	User	Length	Language	Date
1	Emil Dichmann	473	Rust	2025-09-20 14:41:44
2	Vincent Lagerros	524	Rust	2025-01-26 17:16:14
3	Hidden user	736	Rust	2018-11-05 20:19:03
4	Hidden user	736	Rust	2023-05-10 20:08:55
5	Chaoyi Yin	763	Rust	2019-04-01 20:53:32
6	Bas Dirks	789	Rust	2022-01-02 19:42:10
7	Added Kina	815	Rust	2023-03-19 21:48:06
8	Joe Blower	825	Rust	2025-06-06 06:06:32
9	Pankajkumar Patro	831	Rust	2024-10-16 17:45:16
10	David Zacek	845	Rust	2021-05-21 02:16:01

Solution running time distribution