Problem A
Careful Ascent — Problem Statistics

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Submissions	4371
Accepted submissions	1969
Submission ratio	45.05%
Authors	1636
Full solves [?]	1534
Full solve Ratio	93.77%

#	User	Runtime	Language	Date
1	Raul Kooter	0.02 s	C#	2016-11-20 13:47:25
2	Filip Björnåsen	0.02 s	C#	2018-06-04 15:44:02
3	Thomas Norris	0.02 s	C#	2019-10-18 19:46:30
4	Mikael Fiala-Lundström	0.03 s	C#	2021-05-08 00:14:28
5	Göran Andersson	0.03 s	C#	2022-05-19 23:16:49
6	Tomas Vainoris	0.06 s	C#	2023-08-05 21:53:53
7	Matthew Kennedy	0.07 s	C#	2025-04-04 23:27:21

#	User	Runtime	Language	Date
1	Brian Myers	0.01 s	Dart	2023-09-21 01:04:01

#	User	Runtime	Language	Date
1	Jamin Wu	0.08 s	F#	2023-09-29 07:23:46

#	User	Runtime	Language	Date
1	Harald Andersson	0.08 s	Go	2017-06-12 08:41:36
2	Anthony Alves	0.08 s	Go	2018-02-10 19:43:07
3	Norbert Voelker	0.08 s	Go	2021-05-01 17:15:28
4	Ian Howell	0.09 s	Go	2020-02-07 17:21:12

#	User	Runtime	Language	Date
1	Brent Yorgey	0.00 s	Haskell	2017-10-22 23:13:35
2	Esther Chong	0.00 s	Haskell	2017-11-17 12:29:02
3	Antony Lee	0.00 s	Haskell	2018-01-23 00:47:41
4	Olle Eriksson	0.00 s	Haskell	2018-03-10 18:52:14
5	Hidden user	0.00 s	Haskell	2023-01-19 12:59:08
6	Steinar Simonnes	0.00 s	Haskell	2025-01-31 09:21:11
7	Håkon Flatval	0.01 s	Haskell	2018-09-01 18:48:41
8	Hidden user	0.01 s	Haskell	2019-08-26 15:19:45
9	Intrets	0.01 s	Haskell	2019-08-28 13:19:51
10	Jan Hrček	0.01 s	Haskell	2021-03-28 19:53:49

#	User	Runtime	Language	Date
1	Alexander Bauer	0.06 s	Java	2016-11-20 12:42:43
2	Måns Magnusson	0.06 s	Java	2016-11-20 13:06:20
3	Zoran Ristevski	0.06 s	Java	2016-11-20 13:15:06
4	Nikol Nikolova	0.06 s	Java	2016-11-20 13:15:58
5	Domi Bau	0.06 s	Java	2016-11-20 13:26:56
6	Christoph Hahn	0.06 s	Java	2016-11-20 14:01:34
7	Kristian Rosland	0.06 s	Java	2016-11-21 00:15:48
8	Eskil Jarlskog	0.06 s	Java	2016-11-21 13:23:32
9	Martijn Muijsers	0.06 s	Java	2016-11-21 19:19:05
10	Tobias Rohrer	0.06 s	Java	2016-11-22 18:21:53

#	User	Runtime	Language	Date
1	Andoko Chandra	0.42 s	JavaScript (Node.js)	2020-11-14 06:52:42
2	Chris Wong	0.42 s	JavaScript (Node.js)	2022-01-20 13:11:34

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2018-02-03 00:21:44
2	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-01-24 09:52:57
3	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-08-27 22:30:59
4	Peter Menyes	0.03 s	JavaScript (SpiderMonkey)	2021-09-23 14:19:35

#	User	Runtime	Language	Date
1	Hidden user	0.50 s	Julia	2025-05-15 23:12:29
2	Timothy Gaede	0.63 s	Julia	2024-04-06 04:45:08

#	User	Runtime	Language	Date
1	Adam Rankin	0.19 s	Kotlin	2023-08-30 23:18:39
2	Nicholas Johnson	0.21 s	Kotlin	2021-04-19 02:40:15
3	Kelly Dance	0.21 s	Kotlin	2022-10-13 17:47:05
4	Neil Harmon	0.24 s	Kotlin	2019-05-09 14:55:45
5	Einar Kjellback	0.25 s	Kotlin	2019-12-18 23:46:18

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2018-06-17 12:23:14

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.01 s	Prolog	2019-04-29 11:25:05

#	User	Runtime	Language	Date
1	Justin Su	0.02 s	Python 2	2017-09-20 03:21:19
2	Christofer Ohlsson	0.03 s	Python 2	2016-11-20 20:50:17
3	Michael Mullen	0.03 s	Python 2	2016-11-20 22:17:56
4	Frederik Højholt	0.03 s	Python 2	2016-11-23 17:32:14
5	Haggai Liu	0.03 s	Python 2	2017-03-22 08:41:20
6	Jeff Robertson	0.03 s	Python 2	2017-04-14 00:58:32
7	Çağdaş Öztekin	0.03 s	Python 2	2017-09-18 19:02:42
8	William Gan	0.03 s	Python 2	2017-12-20 11:06:26
9	Samuel Perkin	0.03 s	Python 2	2018-04-13 00:07:09
10	Josenildo Silva	0.03 s	Python 2	2018-08-17 16:42:34

#	User	Runtime	Language	Date
1	Christian Lindeström	0.02 s	Python 3	2016-11-20 14:20:17
2	Mathias Rav	0.02 s	Python 3	2016-11-20 14:37:29
3	Hidden user	0.02 s	Python 3	2016-11-20 16:18:46
4	Asger Hautop Drewsen	0.02 s	Python 3	2016-11-21 16:58:52
5	Oskar Haarklou Veileborg	0.02 s	Python 3	2016-11-22 19:37:10
6	Dennis Svedberg	0.02 s	Python 3	2016-12-28 02:22:31
7	Óðinn Eyjólfsson	0.02 s	Python 3	2017-02-08 11:04:36
8	James McDermott	0.02 s	Python 3	2017-06-02 22:09:34
9	Ciara Godwin	0.02 s	Python 3	2017-07-26 15:34:25
10	Aditya Durvasula	0.02 s	Python 3	2017-08-29 00:25:19

#	User	Runtime	Language	Date
1	Lee Tze Han	0.04 s	Ruby	2018-06-29 05:38:27
2	Kok Dith	0.05 s	Ruby	2021-08-23 13:41:16
3	Thomas Feld	0.06 s	Ruby	2023-03-09 14:29:58

#	User	Runtime	Language	Date
1	Eric Pinter	0.00 s	Rust	2021-11-24 02:05:30
2	Freek van Keulen	0.00 s	Rust	2021-12-23 18:48:13
3	Bas Dirks	0.00 s	Rust	2022-02-16 18:43:08
4	Daniel Anker Hermansen	0.00 s	Rust	2022-11-26 22:09:33
5	Hidden user	0.00 s	Rust	2022-12-04 16:18:41
6	Tim Hermansson	0.00 s	Rust	2024-12-05 20:41:30

#	User	Length	Language	Date
1	Matias Lahti	205	C	2016-11-23 21:07:21
2	Leslie Yip	284	C	2022-09-03 05:38:01
3	Sambit Palit	333	C	2020-09-16 23:28:12
4	Stefan Kennedy	336	C	2018-08-01 19:26:10
5	Pim Heeman	353	C	2020-02-19 22:37:11
6	Andrew Roberts	383	C	2017-09-19 03:04:01
7	PhilCampbell	432	C	2021-02-12 14:24:44
8	Alexandra Cyrielle Mangune	442	C	2020-07-21 15:28:33
9	Jacob Israel Salazar	442	C	2020-07-26 18:01:21
10	Florian Marwitz	450	C	2020-06-05 15:45:26

#	User	Length	Language	Date
1	Matthew Kennedy	455	C#	2025-04-04 23:40:31
2	Thomas Norris	604	C#	2019-10-18 19:46:30
3	Göran Andersson	886	C#	2022-05-19 23:16:49
4	Mikael Fiala-Lundström	1302	C#	2021-05-08 00:14:28
5	Tomas Vainoris	1386	C#	2023-08-05 21:53:53
6	Raul Kooter	1590	C#	2016-11-20 13:47:25
7	Filip Björnåsen	1699	C#	2018-06-04 15:44:02

#	User	Length	Language	Date
1	Michael Wu	114	C++	2024-01-26 11:30:07
2	Rohil Shah	114	C++	2024-01-27 19:47:18
3	Yu-Chen Chan	186	C++	2024-02-16 05:12:34
4	乃仁薛	231	C++	2020-05-01 14:03:45
5	Jim Zheng	239	C++	2021-04-18 02:16:54
6	Grae Yeandle	245	C++	2016-12-22 16:13:25
7	Ambrose Liew Cheng Yuan	263	C++	2021-05-14 15:04:40
8	Matthew Tran	264	C++	2019-10-12 01:19:37
9	Alin Odobescu	264	C++	2022-08-10 19:46:12
10	Anton van Es	268	C++	2016-11-22 23:09:40

#	User	Length	Language	Date
1	Brian Myers	1686	Dart	2023-09-21 01:04:01

#	User	Length	Language	Date
1	Jamin Wu	2574	F#	2023-09-29 07:23:46

#	User	Length	Language	Date
1	Ian Howell	295	Go	2020-02-07 17:21:12
2	Harald Andersson	714	Go	2017-06-12 08:41:36
3	Anthony Alves	1072	Go	2018-02-10 19:43:07
4	Norbert Voelker	1278	Go	2021-05-01 17:15:28

#	User	Length	Language	Date
1	Håkon Flatval	415	Haskell	2018-09-01 18:48:41
2	Olle Eriksson	508	Haskell	2018-03-10 18:52:14
3	Antony Lee	741	Haskell	2018-01-23 00:47:41
4	Esther Chong	765	Haskell	2017-11-17 12:29:02
5	Jan Hrček	842	Haskell	2021-03-28 19:53:49
6	Hidden user	1124	Haskell	2019-08-26 15:19:45
7	Brent Yorgey	1230	Haskell	2017-10-22 23:13:35
8	Hidden user	1238	Haskell	2023-01-19 12:59:08
9	Intrets	1535	Haskell	2019-08-28 13:19:51
10	Daniël Barenholz	1590	Haskell	2024-03-24 16:07:46

#	User	Length	Language	Date
1	Marc Dominic San Pedro	426	Java	2023-04-28 12:25:56
2	Spencer Compton	436	Java	2016-11-20 12:14:03
3	Richard Peng	436	Java	2017-12-09 18:14:21
4	Ryan L.	444	Java	2018-04-10 07:00:09
5	Fu Jin	451	Java	2018-06-27 08:23:31
6	Doug Goodman	467	Java	2017-09-13 17:36:11
7	Ruhan Goltay	482	Java	2021-11-26 19:47:34
8	Ada Clevinger	485	Java	2018-03-24 18:52:11
9	Alex Rutledge	487	Java	2017-12-11 21:20:59
10	Nicholas Kocurek	487	Java	2019-05-19 05:09:20

#	User	Length	Language	Date
1	Andoko Chandra	1544	JavaScript (Node.js)	2020-11-14 06:52:42
2	Chris Wong	1614	JavaScript (Node.js)	2022-01-20 13:11:34

#	User	Length	Language	Date
1	Jimmy Gustafsson	109	JavaScript (SpiderMonkey)	2024-08-27 22:30:59
2	Peter Menyes	222	JavaScript (SpiderMonkey)	2021-09-23 14:21:56
3	Bjørn Chr. Soltvedt	282	JavaScript (SpiderMonkey)	2018-02-03 00:21:44
4	Christian Pilegaard Cederquist	331	JavaScript (SpiderMonkey)	2023-01-24 09:52:57

#	User	Length	Language	Date
1	Hidden user	108	Julia	2025-05-15 23:12:29
2	Timothy Gaede	1157	Julia	2024-04-06 04:45:08

#	User	Length	Language	Date
1	Einar Kjellback	352	Kotlin	2019-12-18 23:46:18
2	Adam Rankin	389	Kotlin	2023-08-30 23:18:39
3	Nicholas Johnson	425	Kotlin	2021-04-19 02:40:15
4	Kelly Dance	497	Kotlin	2022-10-13 17:47:05
5	Neil Harmon	988	Kotlin	2019-05-09 14:55:45

#	User	Length	Language	Date
1	Ingemar Ragnemalm	533	Pascal	2018-06-17 12:23:14

#	User	Length	Language	Date
1	Andriy Zyevakov	642	Prolog	2019-04-29 11:25:05

#	User	Length	Language	Date
1	Johan Lyts	166	Python 2	2020-03-29 15:30:21
2	William Gan	179	Python 2	2017-12-20 11:06:26
3	Thomas Feld	207	Python 2	2023-03-09 14:28:15
4	Guan Yang Ze	214	Python 2	2019-09-08 09:39:48
5	Jesper Öqvist	216	Python 2	2018-10-20 18:16:51
6	Justin Su	228	Python 2	2017-09-20 03:21:19
7	Conor McCauley	239	Python 2	2019-11-06 09:17:34
8	Çağdaş Öztekin	247	Python 2	2017-09-18 19:02:42
9	Maj Stenmark	271	Python 2	2019-10-15 22:41:36
10	Klas af Geijerstam	282	Python 2	2018-11-19 17:08:40

#	User	Length	Language	Date
1	Michael Wu	93	Python 3	2024-02-10 21:17:40
2	Benjamin Ye	93	Python 3	2024-02-11 03:02:35
3	Anshuman Dash	109	Python 3	2024-01-24 06:39:26
4	Charles Ancheta	114	Python 3	2023-04-18 22:44:05
5	Michael Goldwasser	116	Python 3	2025-09-25 06:06:59
6	Benjamin Z White	121	Python 3	2023-04-13 00:31:22
7	Christian Lindeström	140	Python 3	2016-11-20 14:20:17
8	Lee Isaac	140	Python 3	2022-05-05 21:47:29
9	Ahmed Chamseddine	142	Python 3	2025-01-14 13:14:18
10	Asger Hautop Drewsen	146	Python 3	2016-11-21 16:58:52

#	User	Length	Language	Date
1	Thomas Feld	77	Ruby	2023-03-09 14:32:47
2	Kok Dith	204	Ruby	2021-08-23 13:41:16
3	Lee Tze Han	616	Ruby	2018-06-29 05:38:27

#	User	Length	Language	Date
1	Bas Dirks	858	Rust	2022-02-16 18:43:08
2	Freek van Keulen	880	Rust	2021-12-23 18:48:13
3	Eric Pinter	1067	Rust	2021-11-24 02:05:30
4	Tim Hermansson	3238	Rust	2024-12-05 20:41:30
5	Daniel Anker Hermansen	10881	Rust	2022-11-26 22:09:33
6	Hidden user	10894	Rust	2022-12-04 16:18:41

Solution running time distribution