Problem A
Counting Stars — Problem Statistics

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Submissions	18615
Accepted submissions	5298
Submission ratio	28.46%
Authors	4170
Full solves [?]	3539
Full solve Ratio	84.87%

#	User	Runtime	Language	Date
1	Klas af Geijerstam	0.02 s	C#	2017-04-11 16:01:55
2	Gaston Gilbert	0.02 s	C#	2017-08-05 04:26:36
3	Daniel Ekmark	0.02 s	C#	2018-05-28 20:53:43
4	Joseph Pugliano	0.02 s	C#	2018-07-26 23:45:51
5	Marek Bina	0.02 s	C#	2019-02-15 17:41:38
6	Mike Garrett	0.02 s	C#	2019-02-17 04:55:52
7	Kareem Idris	0.02 s	C#	2023-03-18 18:21:40
8	Andriy Zyevakov	0.03 s	C#	2016-02-24 11:17:00
9	Benjamin Pintér	0.03 s	C#	2016-07-11 15:25:55
10	Dan	0.03 s	C#	2017-02-02 03:31:10

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.09 s	F#	2023-04-27 18:49:34

#	User	Runtime	Language	Date
1	Markus Takalo	0.08 s	Go	2019-04-26 22:10:26
2	Krzysztof Gibuła	0.08 s	Go	2021-03-20 18:40:54
3	Norbert Voelker	0.08 s	Go	2021-08-27 22:37:02
4	Péter Szakszon	0.08 s	Go	2021-12-28 20:25:03
5	Jacob Monsrud	0.10 s	Go	2022-04-03 19:04:11
6	Hidden user	0.21 s	Go	2021-09-10 20:13:35
7	Gorm Casper	0.22 s	Go	2020-01-27 23:48:42
8	Jenn Shores	0.24 s	Go	2020-06-26 06:35:41
9	Acar Okan Akalin	0.26 s	Go	2018-04-23 03:05:19
10	Hidden user	0.26 s	Go	2018-05-29 22:41:59

#	User	Runtime	Language	Date
1	Steinar Simonnes	0.01 s	Haskell	2024-04-02 11:58:57
2	Hidden user	0.07 s	Haskell	2019-11-21 18:00:18
3	Lim Ming Yean	0.08 s	Haskell	2019-04-14 10:25:51
4	Cooper Bell	0.10 s	Haskell	2022-11-05 18:35:49
5	A Q	0.33 s	Haskell	2018-09-05 04:44:47

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.07 s	Java	2022-10-17 21:11:17
2	Stephen Papadatos	0.08 s	Java	2016-02-25 01:23:11
3	Laura de Waard	0.08 s	Java	2016-11-29 19:51:21
4	Viraj Maddur	0.08 s	Java	2016-12-07 16:24:03
5	Jasper van Merle	0.08 s	Java	2017-05-17 00:40:41
6	Manuel Rodriguez	0.08 s	Java	2017-12-01 15:46:33
7	José Vander Meulen	0.08 s	Java	2018-04-06 22:58:02
8	Niu Xinyuan	0.08 s	Java	2018-07-26 03:43:41
9	Teo Yue Yang	0.08 s	Java	2018-07-26 03:53:09
10	Tan Su Yee	0.08 s	Java	2018-07-27 02:46:49

#	User	Runtime	Language	Date
1	Vilhelm Melkstam	0.08 s	JavaScript (Node.js)	2019-03-14 22:41:17
2	Greg Gorlen	0.22 s	JavaScript (Node.js)	2022-09-23 04:57:17
3	Clayton Johnson	0.48 s	JavaScript (Node.js)	2020-01-30 01:28:16

#	User	Runtime	Language	Date
1	Peter Kedemo	0.03 s	JavaScript (SpiderMonkey)	2015-12-31 10:20:06
2	Bjørn Chr. Soltvedt	0.03 s	JavaScript (SpiderMonkey)	2016-03-04 03:20:22
3	Hà Minh Ngọc	0.05 s	JavaScript (SpiderMonkey)	2016-07-26 18:34:32
4	Hidden user	0.05 s	JavaScript (SpiderMonkey)	2016-07-27 09:06:30
5	Christian Pilegaard Cederquist	0.09 s	JavaScript (SpiderMonkey)	2023-04-28 15:25:09
6	Zach Tschetter	0.13 s	JavaScript (SpiderMonkey)	2023-06-27 01:17:26
7	Yury Yantsevich	0.19 s	JavaScript (SpiderMonkey)	2017-06-29 22:41:02

#	User	Runtime	Language	Date
1	Noszály Csaba	0.53 s	Julia	2025-03-10 19:12:41
2	Timothy Gaede	0.65 s	Julia	2024-05-30 04:57:54

#	User	Runtime	Language	Date
1	Jacob Huebner	0.24 s	Kotlin	2020-04-20 17:55:22
2	John Bowers	0.29 s	Kotlin	2018-02-22 21:16:20
3	Thanh Le	0.30 s	Kotlin	2021-07-06 20:19:02
4	Chris Johnson	0.31 s	Kotlin	2023-09-25 23:39:25
5	Hidden user	0.34 s	Kotlin	2019-12-01 05:10:55
6	Luca Mueller	0.34 s	Kotlin	2024-10-25 02:21:16
7	Lewis Johnson	0.35 s	Kotlin	2023-09-30 15:50:30
8	Neil Harmon	0.54 s	Kotlin	2019-11-25 15:03:28
9	Jake Bounds	0.89 s	Kotlin	2024-10-14 23:39:46

#	User	Runtime	Language	Date
1	Artemis Ngoh	0.01 s	OCaml	2024-04-04 18:20:53
2	luna	0.01 s	OCaml	2024-04-04 19:16:34

#	User	Runtime	Language	Date
1	Connor Billings	0.05 s	PHP	2020-07-29 23:36:28
2	Bao Nam Nguyen	0.06 s	PHP	2023-03-18 18:34:36
3	Mihai Ghita	0.20 s	PHP	2017-04-11 18:47:25
4	Susanne Ragnemalm	0.45 s	PHP	2018-04-26 13:05:16

#	User	Runtime	Language	Date
1	Ger Saris	0.06 s	Python 2	2016-12-14 19:13:38
2	James Lawson	0.06 s	Python 2	2019-02-26 23:03:20
3	Agis Daniels	0.06 s	Python 2	2020-03-11 02:28:05
4	Asher Trockman	0.07 s	Python 2	2018-10-10 23:50:59
5	Troels Bjerre Lund	0.07 s	Python 2	2019-03-07 14:22:11
6	Christofer Ohlsson	0.08 s	Python 2	2015-07-01 20:40:55
7	Matt Bonsall	0.08 s	Python 2	2016-10-20 03:59:16
8	Sigurður Jens Albertsson	0.08 s	Python 2	2017-11-17 18:14:17
9	Linus Karlsson	0.08 s	Python 2	2019-04-20 13:54:57

#	User	Runtime	Language	Date
1	Cheryl Li	0.06 s	Python 3	2017-11-22 01:19:21
2	Markus	0.06 s	Python 3	2019-04-17 21:51:49
3	Ram Basnet	0.07 s	Python 3	2017-12-26 08:50:24
4	Hidden user	0.07 s	Python 3	2018-03-24 20:39:00
5	Daniel Falk	0.07 s	Python 3	2018-04-14 15:55:05
6	Alex Kohanim	0.07 s	Python 3	2018-11-03 05:08:35
7	Erick Ross	0.07 s	Python 3	2018-11-13 22:03:28
8	Brenten Canfield	0.07 s	Python 3	2018-12-08 19:04:23
9	Alex Powers	0.07 s	Python 3	2019-02-19 03:28:16
10	Noah Gergel	0.07 s	Python 3	2019-05-26 07:53:56

#	User	Runtime	Language	Date
1	Macdara mac an tSionnaigh	0.13 s	Ruby	2019-11-03 17:24:14
2	Hidden user	0.14 s	Ruby	2018-10-05 21:17:24
3	Casper Christensen	0.15 s	Ruby	2016-03-30 21:54:31
4	Hidden user	0.18 s	Ruby	2019-02-18 15:58:14

#	User	Runtime	Language	Date
1	Erik Funder Carstensen	0.00 s	Rust	2018-11-10 19:23:58
2	Mathias Adam Møller	0.00 s	Rust	2018-11-10 19:27:20
3	Artur Khuziakhmetov	0.00 s	Rust	2022-07-13 17:42:19
4	Hidden user	0.00 s	Rust	2022-10-13 00:12:31
5	Vincent Lagerros	0.00 s	Rust	2024-05-18 16:07:29
6	Ben Reed	0.00 s	Rust	2024-09-03 11:17:00
7	Louis Bouchard	0.00 s	Rust	2024-09-16 06:17:58
8	Ming Kang	0.00 s	Rust	2025-06-06 08:33:55
9	Joe Blower	0.00 s	Rust	2025-06-17 23:46:35
10	Carlos Eduardo González Carballosa	0.00 s	Rust	2025-10-13 17:36:59

#	User	Length	Language	Date
1	Mattia Marziali	255	C	2024-03-15 23:30:32
2	Jeroen Bransen	756	C	2013-07-02 08:44:57
3	Hidden user	803	C	2014-10-20 12:49:20
4	Max Markos	844	C	2021-09-23 03:44:41
5	Christian Lindeström	885	C	2016-09-21 04:23:05
6	Andreas Björklund	895	C	2019-03-15 18:06:44
7	Ali Mahmood Jafri	943	C	2024-05-04 04:52:30
8	anderson Lo	1004	C	2022-02-04 06:17:24
9	Nicholas O'B-P	1019	C	2024-08-27 01:35:23
10	Aldiyar Semedyarov	1021	C	2017-05-27 15:37:38

#	User	Length	Language	Date
1	Klas af Geijerstam	959	C#	2017-04-11 16:01:55
2	Esty Crow	1116	C#	2023-07-22 01:27:23
3	Marek Bina	1165	C#	2019-02-15 17:41:38
4	Anthony Ye	1167	C#	2023-07-23 18:20:23
5	Leslie Yip	1630	C#	2022-07-31 13:41:49
6	Daniel Ekmark	1850	C#	2018-05-28 20:53:43
7	Kareem Idris	1868	C#	2023-03-18 18:21:40
8	Gaston Gilbert	1913	C#	2017-08-05 04:26:36
9	Adam Grady	2124	C#	2021-10-08 18:28:20
10	Joseph Pugliano	2137	C#	2018-07-26 23:45:51

#	User	Length	Language	Date
1	Alen Hayrapetyan	511	C++	2024-10-14 00:36:23
2	Budi Arbenta	560	C++	2016-11-25 08:02:18
3	Dhipta Raditya	563	C++	2016-01-28 09:15:54
4	Inez Zahra Nabila	563	C++	2016-01-29 01:14:34
5	Yordy Yosef Ortiz bizarro	577	C++	2025-10-12 22:35:31
6	Kaifei Chen	582	C++	2013-07-02 08:40:46
7	Mustafa Serdar Şanlı	594	C++	2017-09-17 19:13:08
8	Muhammad Rizky Fitrianor	611	C++	2016-04-28 06:14:42
9	Jan Keith Darunday	616	C++	2016-02-01 17:48:06
10	Anis Farhan Itsnaini	620	C++	2016-11-25 08:08:17

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	1445	F#	2023-04-27 18:49:34

#	User	Length	Language	Date
1	Mitchell Mohorovich	899	Go	2016-02-25 01:28:28
2	Krzysztof Gibuła	937	Go	2021-03-20 18:40:54
3	Hidden user	970	Go	2021-09-10 20:13:35
4	Acar Okan Akalin	1011	Go	2018-04-23 03:05:19
5	Markus Takalo	1208	Go	2019-04-26 22:10:26
6	Gorm Casper	1246	Go	2020-01-19 20:33:17
7	Hidden user	1406	Go	2018-05-29 22:41:59
8	Norbert Voelker	1499	Go	2021-08-27 22:37:02
9	Jenn Shores	1939	Go	2020-06-26 06:35:41
10	Jayant Singh	1941	Go	2018-08-23 14:36:30

#	User	Length	Language	Date
1	Lim Ming Yean	1100	Haskell	2019-04-14 10:25:51
2	A Q	1464	Haskell	2018-09-05 04:44:47
3	Steinar Simonnes	1979	Haskell	2024-04-02 12:01:03
4	Cooper Bell	2650	Haskell	2022-11-05 18:35:49
5	Hidden user	13106	Haskell	2019-11-21 18:00:18

#	User	Length	Language	Date
1	Doug Goodman	821	Java	2016-06-15 20:23:17
2	Turner Atwood	859	Java	2018-03-01 01:37:42
3	Nicholas Mugleston	899	Java	2019-09-18 04:34:07
4	Austin Girouard	919	Java	2019-03-15 00:26:31
5	Thomas King	933	Java	2019-09-18 00:10:22
6	Nathan Nguyen	951	Java	2020-04-19 18:47:14
7	Raymond Arrington	951	Java	2024-06-19 21:06:20
8	Leo Wang	957	Java	2018-12-18 05:34:54
9	Zhi Rui Guo	961	Java	2020-09-27 23:39:34
10	Shaelynn Brown	985	Java	2017-02-09 04:20:30

#	User	Length	Language	Date
1	Vilhelm Melkstam	993	JavaScript (Node.js)	2019-03-14 22:41:17
2	Greg Gorlen	1162	JavaScript (Node.js)	2022-09-23 05:22:06
3	Clayton Johnson	4483	JavaScript (Node.js)	2020-01-30 01:28:16

#	User	Length	Language	Date
1	Bjørn Chr. Soltvedt	782	JavaScript (SpiderMonkey)	2016-03-04 03:20:22
2	Christian Pilegaard Cederquist	830	JavaScript (SpiderMonkey)	2023-04-28 15:25:09
3	Zach Tschetter	974	JavaScript (SpiderMonkey)	2023-06-27 01:17:26
4	Peter Kedemo	1069	JavaScript (SpiderMonkey)	2015-12-31 10:20:06
5	Hà Minh Ngọc	1892	JavaScript (SpiderMonkey)	2016-07-26 18:34:32
6	Hidden user	1892	JavaScript (SpiderMonkey)	2016-07-27 09:06:30
7	Yury Yantsevich	3246	JavaScript (SpiderMonkey)	2017-06-29 22:41:02

#	User	Length	Language	Date
1	Noszály Csaba	323	Julia	2025-03-10 19:19:13
2	Timothy Gaede	1406	Julia	2024-05-30 04:57:54

#	User	Length	Language	Date
1	John Bowers	988	Kotlin	2018-02-22 21:16:20
2	Thanh Le	1001	Kotlin	2021-07-06 20:19:02
3	Luca Mueller	1205	Kotlin	2024-10-25 02:21:16
4	Lewis Johnson	1519	Kotlin	2023-09-26 01:02:21
5	Chris Johnson	1595	Kotlin	2023-09-25 23:39:25
6	Jake Bounds	1776	Kotlin	2024-10-14 23:39:46
7	Hidden user	1948	Kotlin	2019-12-01 05:10:55
8	Neil Harmon	2147	Kotlin	2019-11-25 15:03:28
9	Jacob Huebner	3041	Kotlin	2020-04-20 17:55:22

#	User	Length	Language	Date
1	Artemis Ngoh	1351	OCaml	2024-04-04 21:12:09
2	luna	1793	OCaml	2024-04-04 19:16:34

#	User	Length	Language	Date
1	Bao Nam Nguyen	1006	PHP	2023-03-18 18:34:36
2	Susanne Ragnemalm	1099	PHP	2018-04-26 13:05:16
3	Connor Billings	1138	PHP	2020-07-29 23:36:28
4	Mihai Ghita	3200	PHP	2017-04-11 18:47:25

#	User	Length	Language	Date
1	Thomas Feld	586	Python 2	2019-08-21 16:55:34
2	Matt Bonsall	703	Python 2	2016-10-20 03:59:16
3	Troels Bjerre Lund	710	Python 2	2019-03-07 14:22:11
4	Thomas Vu	717	Python 2	2019-09-27 00:20:15
5	Jesper Öqvist	737	Python 2	2018-11-07 19:08:01
6	Johann Ly	827	Python 2	2018-07-07 21:44:16
7	João Pedro Alvito	848	Python 2	2018-12-17 20:41:20
8	Robin Guzniczak	850	Python 2	2017-11-18 00:04:16
9	James Lawson	892	Python 2	2019-02-26 23:03:20

#	User	Length	Language	Date
1	Michael Goldwasser	325	Python 3	2024-10-10 07:23:01
2	David Aldenbro	406	Python 3	2025-10-14 13:37:21
3	Björn Thor Stefánsson	426	Python 3	2024-03-06 17:11:29
4	Liam Kellogg	446	Python 3	2024-03-30 11:27:42
5	Ahmed Chamseddine	450	Python 3	2024-10-31 23:00:13
6	Thibault Raffaillac	505	Python 3	2021-02-26 15:35:40
7	Grayden Price	523	Python 3	2020-10-24 05:09:32
8	Tomasz Tomasik	555	Python 3	2022-11-19 08:10:18
9	Kelly Dance	570	Python 3	2022-11-02 02:06:51
10	Troels Bjerre Lund	587	Python 3	2019-03-07 15:28:59

#	User	Length	Language	Date
1	Hidden user	675	Ruby	2018-10-05 21:17:24
2	Hidden user	710	Ruby	2019-02-18 15:58:14
3	Casper Christensen	1028	Ruby	2016-03-30 21:54:31
4	Macdara mac an tSionnaigh	1306	Ruby	2019-11-03 17:24:14

#	User	Length	Language	Date
1	Vincent Lagerros	1637	Rust	2024-05-18 16:07:29
2	Ming Kang	1687	Rust	2025-06-06 08:33:55
3	Carlos Eduardo González Carballosa	1743	Rust	2025-10-13 17:36:59
4	Bas Dirks	1863	Rust	2022-01-14 16:54:46
5	Ben Reed	1890	Rust	2024-09-03 11:24:09
6	Hidden user	1906	Rust	2022-10-13 00:12:31
7	Artur Khuziakhmetov	1920	Rust	2022-07-13 17:42:19
8	Joe Blower	1973	Rust	2025-06-17 23:46:35
9	Erik Funder Carstensen	2314	Rust	2018-11-10 19:23:58
10	Mathias Adam Møller	2344	Rust	2018-11-10 19:27:20

Solution running time distribution