Problem A
Coin Stacks — Problem Statistics

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Submissions	5721
Accepted submissions	1304
Submission ratio	22.79%
Authors	1193
Full solves [?]	967
Full solve Ratio	81.06%

#	User	Runtime	Language	Date
1	Bergur Snorrason	0.00 s	C	2020-11-08 18:42:21
2	Ethan Davis	0.00 s	C	2021-02-27 01:11:20
3	Hidden user	0.00 s	C	2021-10-21 16:19:48
4	Enzo Ruggeri Isotton	0.00 s	C	2025-09-16 22:33:24

#	User	Runtime	Language	Date
1	Jakob Andersson	0.02 s	C#	2021-11-08 18:59:37
2	Ahmed Dabbous	0.02 s	C#	2022-02-25 23:47:57
3	Magnus Nørgaard	0.03 s	C#	2020-11-07 12:42:28
4	Valentk777	0.03 s	C#	2020-11-07 13:33:16
5	Simon Boye Jørgensen	0.03 s	C#	2020-11-07 15:22:38
6	Bjarke Brodin	0.03 s	C#	2020-11-09 15:19:29
7	Joachim Nebel	0.03 s	C#	2021-09-28 11:15:38
8	ANDRES LOBO ROCA	0.03 s	C#	2021-10-27 20:59:29
9	Magnus Johansson	0.03 s	C#	2021-10-28 17:30:29
10	Dan Church	0.03 s	C#	2022-06-25 15:49:02

#	User	Runtime	Language	Date
1	Ari Páll Agnarsson	0.01 s	Common Lisp	2021-01-28 01:54:52

#	User	Runtime	Language	Date
1	Martynas Budriūnas	0.08 s	Go	2020-11-07 11:56:55
2	Hidden user	0.08 s	Go	2021-04-04 04:12:46

#	User	Runtime	Language	Date
1	Rudy Matela	0.00 s	Haskell	2023-09-03 15:36:20
2	Bjarki Baldursson Harksen	0.01 s	Haskell	2021-01-26 14:21:44
3	Zach Tschetter	0.01 s	Haskell	2021-03-31 17:42:47
4	Åsmund Kløvstad	0.01 s	Haskell	2021-10-06 19:02:50
5	Stian	0.01 s	Haskell	2021-10-07 21:40:17

#	User	Runtime	Language	Date
1	Crystal Sharpe	0.06 s	Java	2020-11-10 03:34:01
2	Alice Ryhl	0.07 s	Java	2020-11-07 11:40:14
3	Bjørn Dons	0.07 s	Java	2020-12-12 11:33:37
4	Liam Keliher	0.07 s	Java	2020-12-15 11:20:09
5	Joachim Borup	0.07 s	Java	2020-12-22 20:00:35
6	Choo Jun Inn Darren	0.07 s	Java	2024-10-14 13:39:19
7	Morten Flensborg Jensen	0.08 s	Java	2020-11-14 21:13:54
8	Gustav Valentin Yde	0.08 s	Java	2020-11-18 16:20:56
9	Collin Jakubik	0.08 s	Java	2021-02-20 23:41:56
10	LEE DE EN	0.08 s	Java	2024-09-21 05:04:20

#	User	Runtime	Language	Date
1	Leopold	0.05 s	JavaScript (Node.js)	2024-10-27 16:38:58
2	Ihor Kolisnyk	0.05 s	JavaScript (Node.js)	2025-09-09 18:14:58
3	Adam Gustafsson	0.05 s	JavaScript (Node.js)	2025-11-13 21:45:25
4	Frida Larsson	0.09 s	JavaScript (Node.js)	2022-03-20 21:44:14
5	Alan Balderrama	0.09 s	JavaScript (Node.js)	2023-03-22 19:31:58
6	Maximilian Schön	0.10 s	JavaScript (Node.js)	2022-08-30 18:19:21
7	Mandizvidza Evidence	0.10 s	JavaScript (Node.js)	2023-04-16 23:30:54

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.03 s	JavaScript (SpiderMonkey)	2020-11-08 23:10:52
2	Christian Pilegaard Cederquist	0.03 s	JavaScript (SpiderMonkey)	2023-08-01 16:56:03

#	User	Runtime	Language	Date
1	Jacob Huebner	0.12 s	Kotlin	2021-07-26 08:46:00
2	Josenildo Silva	0.13 s	Kotlin	2021-12-03 22:05:52
3	Nicholas Johnson	0.15 s	Kotlin	2021-07-31 06:10:26
4	Adrian Wireklint	0.17 s	Kotlin	2022-01-02 11:30:29
5	Thomas Forntoh	0.22 s	Kotlin	2022-08-21 12:04:02

#	User	Runtime	Language	Date
1	Cian Ruane	0.01 s	OCaml	2020-11-21 21:21:05

#	User	Runtime	Language	Date
1	Jenish Lal Shrestha	0.02 s	PHP	2025-11-08 00:52:30

#	User	Runtime	Language	Date
1	Thomas Feld	0.03 s	Python 2	2020-11-12 11:51:04
2	Sebastian Boldsen Jakobsen	0.04 s	Python 2	2020-11-07 12:14:09
3	Björn Þór Jónsson	0.04 s	Python 2	2020-11-07 13:38:22
4	Samúel Arnar Hafsteinsson	0.04 s	Python 2	2020-11-07 14:02:30
5	Frederik Buch	0.04 s	Python 2	2020-11-07 14:24:46
6	Johan Lyts	0.05 s	Python 2	2020-11-07 21:52:54
7	Lars Åström	0.06 s	Python 2	2020-11-07 11:11:57
8	Björn Magnusson	0.06 s	Python 2	2020-11-07 11:29:24
9	Andreas Björklund	0.06 s	Python 2	2020-11-07 12:41:24

#	User	Runtime	Language	Date
1	Louis	0.04 s	Python 3	2025-01-16 10:05:28
2	Sigge Olofsgård	0.04 s	Python 3	2025-09-30 18:40:20
3	Xiaomeng Li	0.04 s	Python 3	2025-10-03 15:54:05
4	Noah Hessen Bjerke	0.04 s	Python 3	2025-11-21 10:00:54
5	E-Joon Ko	0.05 s	Python 3	2022-04-06 14:14:02
6	Henric Andersson	0.05 s	Python 3	2022-06-23 22:04:47
7	Hidden user	0.05 s	Python 3	2022-08-25 14:41:59
8	Mukerem Ali Nur	0.05 s	Python 3	2022-09-23 08:42:55
9	Petras Kanapinskas	0.05 s	Python 3	2022-09-24 19:14:52
10	Thomas Bonde Hansen	0.05 s	Python 3	2023-09-15 14:36:23

#	User	Runtime	Language	Date
1	Eskil Queseth	0.00 s	Rust	2020-11-07 11:27:54
2	Klas af Geijerstam	0.00 s	Rust	2020-11-07 12:07:53
3	Max Holmberg	0.00 s	Rust	2020-11-07 18:19:32
4	Ole Johan Walderhaug	0.00 s	Rust	2020-11-10 02:11:12
5	Artur Khuziakhmetov	0.00 s	Rust	2022-07-21 19:43:05
6	Daniel Anker Hermansen	0.00 s	Rust	2024-12-18 12:31:11
7	Noah Webber	0.00 s	Rust	2025-09-15 04:07:25
8	Giacomo Sanna	0.00 s	Rust	2025-10-05 17:49:37

#	User	Length	Language	Date
1	Hidden user	1181	C	2021-10-21 16:19:48
2	Bergur Snorrason	1208	C	2020-11-08 18:42:21
3	Enzo Ruggeri Isotton	1255	C	2025-09-16 22:33:24
4	Ethan Davis	1478	C	2021-02-27 01:11:20

#	User	Length	Language	Date
1	Robert van Horst	969	C#	2024-08-05 18:28:16
2	Bjarke Brodin	1128	C#	2020-11-09 15:19:29
3	Andreas van der Merwe	1218	C#	2023-10-24 13:34:55
4	Magnus Johansson	1520	C#	2021-10-28 17:30:29
5	Dan Church	1652	C#	2022-06-25 15:49:02
6	Simon Boye Jørgensen	1798	C#	2020-11-07 15:22:38
7	Valentk777	1991	C#	2020-11-07 13:33:16
8	Jephren Naicker	2008	C#	2023-07-13 18:50:17
9	Ahmed Dabbous	2091	C#	2022-02-25 23:47:57
10	Kristoffer Højelse	2097	C#	2020-11-14 01:01:45

#	User	Length	Language	Date
1	yujia 何	475	C++	2024-10-05 17:37:58
2	Yeung Man Tsung	531	C++	2023-01-09 16:34:33
3	Shang Zhou	542	C++	2021-12-29 06:27:07
4	Yun839	549	C++	2024-10-05 10:20:37
5	Mustefa Kamil	560	C++	2022-09-23 13:06:03
6	Mustefa Kamil	560	C++	2022-12-28 21:55:16
7	Elias Lolck	579	C++	2023-09-15 13:21:08
8	Minh Nguyen	593	C++	2021-02-20 20:35:34
9	Anson Ho	597	C++	2020-11-08 11:31:56
10	Elbert	609	C++	2022-12-03 19:36:24

#	User	Length	Language	Date
1	Ari Páll Agnarsson	5777	Common Lisp	2021-01-28 01:54:52

#	User	Length	Language	Date
1	Martynas Budriūnas	708	Go	2020-11-07 11:56:55
2	Hidden user	1330	Go	2021-04-04 04:12:46

#	User	Length	Language	Date
1	Zach Tschetter	855	Haskell	2021-03-31 17:42:47
2	Bjarki Baldursson Harksen	1125	Haskell	2021-01-26 14:21:44
3	Åsmund Kløvstad	1352	Haskell	2021-10-06 19:02:50
4	Rudy Matela	1435	Haskell	2023-09-03 15:36:20
5	Stian	2098	Haskell	2021-10-07 21:40:17

#	User	Length	Language	Date
1	Arup Ratan Guha	930	Java	2021-02-20 19:13:54
2	Josh Henderson	1076	Java	2021-04-06 02:46:09
3	Matthew Pimienta	1079	Java	2022-10-08 19:21:29
4	Gayatri Chitturi	1087	Java	2022-03-30 16:17:54
5	Crystal Sharpe	1118	Java	2020-11-10 03:34:01
6	Joshua Fair	1193	Java	2021-02-20 19:05:36
7	Hidden user	1195	Java	2025-04-14 20:46:58
8	Jonatan Wulcan	1206	Java	2021-03-28 12:50:28
9	Doug Goodman	1243	Java	2021-03-20 18:44:11
10	mads flink	1259	Java	2020-11-07 13:39:16

#	User	Length	Language	Date
1	Adam Gustafsson	846	JavaScript (Node.js)	2025-11-13 21:45:25
2	Leopold	1025	JavaScript (Node.js)	2024-10-27 16:38:58
3	Ihor Kolisnyk	1093	JavaScript (Node.js)	2025-09-09 18:14:58
4	Alan Balderrama	1178	JavaScript (Node.js)	2023-03-22 19:31:58
5	Frida Larsson	1449	JavaScript (Node.js)	2022-03-20 21:44:14
6	Maximilian Schön	1718	JavaScript (Node.js)	2022-08-30 18:28:05
7	Mandizvidza Evidence	1850	JavaScript (Node.js)	2023-04-16 23:33:27

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	425	JavaScript (SpiderMonkey)	2023-08-01 16:56:03
2	Bjørn Chr. Soltvedt	1512	JavaScript (SpiderMonkey)	2020-11-08 23:17:09

#	User	Length	Language	Date
1	Thomas Forntoh	994	Kotlin	2022-08-21 12:04:02
2	Adrian Wireklint	1212	Kotlin	2022-01-02 11:30:29
3	Josenildo Silva	1671	Kotlin	2021-12-03 22:05:52
4	Jacob Huebner	1700	Kotlin	2021-07-26 08:46:00
5	Nicholas Johnson	3127	Kotlin	2021-07-31 06:10:26

#	User	Length	Language	Date
1	Cian Ruane	1484	OCaml	2020-11-21 21:21:05

#	User	Length	Language	Date
1	Jenish Lal Shrestha	1492	PHP	2025-11-08 00:52:30

#	User	Length	Language	Date
1	Thomas Feld	234	Python 2	2020-11-12 11:51:04
2	Lars Åström	460	Python 2	2020-11-07 11:11:57
3	Björn Magnusson	489	Python 2	2020-11-07 11:29:24
4	Björn Þór Jónsson	516	Python 2	2020-11-07 13:38:22
5	Andreas Björklund	570	Python 2	2020-11-07 12:41:24
6	Frederik Buch	609	Python 2	2020-11-07 14:24:46
7	Samúel Arnar Hafsteinsson	625	Python 2	2020-11-07 14:02:30
8	Johan Lyts	796	Python 2	2020-11-07 21:52:54
9	Sebastian Boldsen Jakobsen	815	Python 2	2020-11-07 12:14:09

#	User	Length	Language	Date
1	Lee Isaac	259	Python 3	2023-01-09 16:49:47
2	Noah Hessen Bjerke	268	Python 3	2024-09-27 16:41:06
3	Ivar Lee Fevang	284	Python 3	2025-11-21 10:16:26
4	Gerth Stølting Brodal	319	Python 3	2020-11-07 11:52:48
5	Timothy White	326	Python 3	2021-12-26 23:41:40
6	Michael Wolf-Sonkin	334	Python 3	2021-02-14 19:19:15
7	Yong Mao	338	Python 3	2023-02-01 23:03:02
8	Minase Fikadu	343	Python 3	2022-09-23 15:07:37
9	Marcus Xu	344	Python 3	2023-01-11 09:50:07
10	Oskar Haarklou Veileborg	348	Python 3	2020-11-07 22:12:52

#	User	Length	Language	Date
1	Eskil Queseth	937	Rust	2020-11-07 11:27:54
2	Giacomo Sanna	1440	Rust	2025-10-05 17:49:37
3	Artur Khuziakhmetov	1637	Rust	2022-07-21 19:43:05
4	Noah Webber	1645	Rust	2025-09-16 22:28:17
5	Ole Johan Walderhaug	2466	Rust	2020-11-10 02:11:12
6	Klas af Geijerstam	6102	Rust	2020-11-07 18:19:26
7	Max Holmberg	6102	Rust	2020-11-07 18:19:32
8	Daniel Anker Hermansen	16768	Rust	2024-12-18 12:31:11

Solution running time distribution