Problem A
Estimating the Area of a Circle — Problem Statistics

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Submissions	8775
Accepted submissions	4875
Submission ratio	55.56%
Authors	4540
Full solves [?]	4302
Full solve Ratio	94.76%

#	User	Runtime	Language	Date
1	Thomas Feld	0.01 s	Bash	2023-04-27 07:39:18
2	Chenzhang Hu	0.09 s	Bash	2024-02-05 15:25:55

#	User	Runtime	Language	Date
1	Piotr Karpala	0.02 s	C#	2015-09-20 20:52:16
2	Niklas Huss	0.02 s	C#	2015-10-12 18:53:47
3	Jens Mossig	0.02 s	C#	2015-10-20 16:08:20
4	Andriy Zyevakov	0.02 s	C#	2015-10-25 08:33:48
5	Stefan Nordling	0.02 s	C#	2015-10-30 20:34:48
6	Love Engman	0.02 s	C#	2016-03-31 09:38:36
7	Luiz Miranda	0.02 s	C#	2016-04-02 19:57:00
8	Joe Amenta	0.02 s	C#	2016-04-05 02:48:12
9	Khin Nyunt	0.02 s	C#	2016-04-11 04:16:15
10	Yé Wai Yan	0.02 s	C#	2016-05-16 16:54:47

#	User	Runtime	Language	Date
1	Francisco Romero	0.01 s	COBOL	2022-01-25 19:54:21

#	User	Runtime	Language	Date
1	David Cawthon	0.04 s	Common Lisp	2019-05-10 00:00:13

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.05 s	F#	2022-06-05 13:08:59
2	Patrick Bahr	0.06 s	F#	2021-02-20 13:41:16
3	Tim Mondorf	0.06 s	F#	2021-12-01 14:46:48

#	User	Runtime	Language	Date
1	Daniel Agatan	0.00 s	Go	2025-03-01 18:23:05
2	Norbert Voelker	0.02 s	Go	2021-04-11 18:24:25
3	Hidden user	0.02 s	Go	2023-08-13 11:42:31
4	Shehab Ahmed Hatem	0.02 s	Go	2023-11-26 17:57:31
5	Lim Ming Yean	0.04 s	Go	2018-11-17 13:48:55
6	Angelo Yang	0.04 s	Go	2019-05-01 00:22:00
7	Ng Wei Jie	0.05 s	Go	2020-02-17 19:52:50
8	Thomas Mailund	0.05 s	Go	2020-11-22 17:54:37
9	Badr Kamel	0.05 s	Go	2021-05-09 14:09:50
10	Kok Dith	0.05 s	Go	2021-07-30 16:39:09

#	User	Runtime	Language	Date
1	Wilfried van Asten	0.01 s	Haskell	2015-11-28 06:11:11
2	Carl Agrell	0.01 s	Haskell	2016-09-28 13:21:20
3	César Antonio Carvajal de la Haza	0.01 s	Haskell	2017-03-11 14:19:14
4	Antonio Morales Pérez	0.01 s	Haskell	2017-03-20 17:12:54
5	Daniel German	0.01 s	Haskell	2018-06-06 18:31:35
6	Tim Put	0.01 s	Haskell	2021-03-05 04:24:52
7	Hidden user	0.02 s	Haskell	2015-10-01 22:54:49
8	Blake Hyde	0.02 s	Haskell	2015-10-15 02:30:17
9	Christian Leipe	0.02 s	Haskell	2015-11-30 21:11:58
10	Peter Deal	0.02 s	Haskell	2016-05-07 19:01:46

#	User	Runtime	Language	Date
1	Sven Rönnbäck	0.06 s	Java	2022-12-17 16:27:33
2	Lee Heng Sheng	0.07 s	Java	2024-04-18 14:19:53
3	Dennis Ang	0.09 s	Java	2015-09-25 17:59:22
4	Pål Forsberg	0.09 s	Java	2015-10-02 13:25:33
5	Eric Andow	0.09 s	Java	2015-10-04 19:58:32
6	Petter Andersson	0.09 s	Java	2015-10-18 17:55:56
7	Omar Brome	0.09 s	Java	2015-11-21 09:17:11
8	Joel Vikström	0.09 s	Java	2015-12-04 08:16:13
9	Łukasz Antkowiak	0.09 s	Java	2015-12-24 13:27:39
10	Michael Sullivan	0.09 s	Java	2015-12-25 06:34:05

#	User	Runtime	Language	Date
1	Carl Sundvall	0.06 s	JavaScript (Node.js)	2018-10-28 20:05:42
2	Hidden user	0.06 s	JavaScript (Node.js)	2023-11-19 01:31:21
3	Anthony Czarnecki	0.06 s	JavaScript (Node.js)	2024-04-18 20:59:16
4	tannal	0.07 s	JavaScript (Node.js)	2024-01-17 07:25:34
5	Andoko Chandra	0.43 s	JavaScript (Node.js)	2020-10-05 13:41:42
6	Tilo Hirsch	0.44 s	JavaScript (Node.js)	2020-07-13 17:18:22
7	John	0.44 s	JavaScript (Node.js)	2020-07-28 23:31:39
8	Hovhannes Kantuni	0.44 s	JavaScript (Node.js)	2020-09-03 01:35:50
9	Chris Wong	0.44 s	JavaScript (Node.js)	2021-02-03 20:00:58
10	Ralf Leistad	0.44 s	JavaScript (Node.js)	2021-08-11 13:37:05

#	User	Runtime	Language	Date
1	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2015-12-22 17:59:55
2	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-01-16 12:14:02
3	Gabriel Lau	0.01 s	JavaScript (SpiderMonkey)	2016-03-28 22:10:51
4	Michael Laszlo	0.01 s	JavaScript (SpiderMonkey)	2016-09-28 14:48:54
5	Cole Rauh	0.01 s	JavaScript (SpiderMonkey)	2016-10-06 17:31:34
6	Spencer Smith	0.01 s	JavaScript (SpiderMonkey)	2017-06-06 20:07:40
7	Peter Menyes	0.01 s	JavaScript (SpiderMonkey)	2017-08-25 16:03:49
8	Nicklas Utgaard	0.01 s	JavaScript (SpiderMonkey)	2017-12-31 14:20:27
9	Dilawar Mahmood	0.01 s	JavaScript (SpiderMonkey)	2018-02-15 17:58:00
10	Robin Livesey	0.01 s	JavaScript (SpiderMonkey)	2018-04-16 10:17:09

#	User	Runtime	Language	Date
1	Hidden user	0.45 s	Julia	2025-04-12 14:37:10
2	Timothy Gaede	0.53 s	Julia	2024-03-20 17:11:23

#	User	Runtime	Language	Date
1	Albert Pala	0.19 s	Kotlin	2021-05-27 02:35:15
2	Phường Lên	0.25 s	Kotlin	2020-02-14 04:38:26
3	Taylor South	0.26 s	Kotlin	2023-03-28 21:22:43
4	Dmitry Shostak	0.27 s	Kotlin	2018-08-20 12:33:55
5	Adam Rankin	0.28 s	Kotlin	2023-04-24 02:18:14
6	Sarek Høverstad Skotåm	0.31 s	Kotlin	2020-10-10 22:12:19
7	Sergey Jakobsen	0.31 s	Kotlin	2021-08-17 10:59:27
8	Merih Bora Poçan	0.32 s	Kotlin	2020-09-06 20:53:46
9	Jonathan Soo	0.34 s	Kotlin	2019-06-25 02:21:15
10	Einar Kjellback	0.34 s	Kotlin	2019-12-03 17:01:32

#	User	Runtime	Language	Date
1	Shehab Ahmed Hatem	0.00 s	Lua	2023-11-16 15:16:18
2	Zeheng Li	0.01 s	Lua	2023-12-12 23:23:45

#	User	Runtime	Language	Date
1	Hidden user	0.01 s	OCaml	2025-06-21 20:25:19

#	User	Runtime	Language	Date
1	Egor Shchetinin	0.00 s	Pascal	2018-01-29 16:43:59
2	Vova Podkorytov	0.00 s	Pascal	2018-01-29 17:26:52
3	David Connolly	0.00 s	Pascal	2021-10-06 22:01:56
4	Hidden user	0.00 s	Pascal	2025-08-09 18:42:01

#	User	Runtime	Language	Date
1	Saito Ta	0.02 s	Perl	2024-04-24 06:48:51

#	User	Runtime	Language	Date
1	Silvena Lam	0.01 s	PHP	2016-02-10 08:03:15
2	Steven D. Wilson	0.01 s	PHP	2016-03-26 02:02:45
3	Hidden user	0.01 s	PHP	2017-06-18 20:49:17
4	Jonas Lindenskov Nielsen	0.01 s	PHP	2019-10-14 09:45:42
5	Renate	0.01 s	PHP	2021-04-22 11:35:51
6	Andre Wahyudi	0.01 s	PHP	2022-10-18 05:24:00

#	User	Runtime	Language	Date
1	Hadi Qovaizi	0.03 s	Prolog	2016-04-30 14:21:52
2	Hakan Kjellerstrand	0.04 s	Prolog	2023-01-28 22:09:58

#	User	Runtime	Language	Date
1	Johannes Agestam	0.03 s	Python 2	2015-10-13 11:46:21
2	Alexander Teno	0.03 s	Python 2	2016-01-07 16:24:15
3	James Bridgewater	0.03 s	Python 2	2017-02-11 22:33:18
4	Christofer Ohlsson	0.04 s	Python 2	2015-08-18 20:22:11
5	Nick Wu	0.04 s	Python 2	2015-10-05 00:42:37
6	Greg Hamerly	0.04 s	Python 2	2015-10-13 21:32:02
7	Erik Sillén	0.04 s	Python 2	2015-10-16 13:52:15
8	Oskar Haarklou Veileborg	0.04 s	Python 2	2015-10-17 15:07:53
9	Hans Rusten	0.04 s	Python 2	2015-10-19 18:20:12
10	Blake Hawkins	0.04 s	Python 2	2015-10-21 22:04:24

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	Python 3	2015-09-15 07:58:31
2	Victor Zheng	0.02 s	Python 3	2015-10-04 03:15:16
3	Snild Dolkow	0.02 s	Python 3	2015-10-04 14:12:07
4	James Elías Sigurðarson	0.02 s	Python 3	2015-10-10 00:36:08
5	Bjarki Stefánsson	0.02 s	Python 3	2015-10-12 00:08:08
6	Johannes Agestam	0.02 s	Python 3	2015-10-13 11:45:21
7	Emil Riis Hansen	0.02 s	Python 3	2015-10-14 19:27:10
8	Markus Lidström	0.02 s	Python 3	2015-10-30 21:19:54
9	Hidden user	0.02 s	Python 3	2015-11-27 23:39:14
10	Mikael Hedin	0.02 s	Python 3	2015-12-02 09:03:52

#	User	Runtime	Language	Date
1	Ben Ellis	0.03 s	Ruby	2015-12-15 09:24:30
2	Casper Christensen	0.03 s	Ruby	2016-01-01 01:23:05
3	Lasse Berglund	0.03 s	Ruby	2016-03-29 11:18:51
4	Kellen Watt	0.03 s	Ruby	2016-06-04 17:18:13
5	Erik Rydbert	0.03 s	Ruby	2016-07-11 02:35:28
6	Clifford Owino	0.03 s	Ruby	2017-05-24 14:09:11
7	Reed Harris	0.03 s	Ruby	2018-03-06 18:25:18
8	Hidden user	0.03 s	Ruby	2018-03-06 20:39:50
9	Paul Vinell	0.04 s	Ruby	2018-04-13 14:01:02
10	Enzo Crance	0.05 s	Ruby	2018-08-16 02:44:26

#	User	Length	Language	Date
1	Thomas Feld	49	Bash	2023-04-27 07:39:18
2	Chenzhang Hu	49	Bash	2025-09-13 02:14:51

#	User	Length	Language	Date
1	Martin Blom	150	C	2023-10-18 05:17:32
2	Matthew Weston	185	C	2021-12-28 14:47:48
3	Wesley Stephanak	188	C	2019-02-07 03:56:11
4	Oliver Noreklev	199	C	2025-10-01 14:51:37
5	Hidden user	212	C	2016-04-29 02:03:45
6	Matteo Piano	216	C	2016-12-21 10:16:23
7	Chaimaâ Azizyani	217	C	2020-08-20 14:37:50
8	Olav Røthe Bakken	219	C	2017-10-21 21:45:29
9	Jack Rosenthal	221	C	2015-11-16 05:05:21
10	April Clark	222	C	2021-09-23 23:47:05

#	User	Length	Language	Date
1	Deci Bel	295	C#	2025-07-25 17:30:18
2	Marek Bina	412	C#	2019-02-15 10:23:58
3	Göran Andersson	439	C#	2022-05-08 20:21:03
4	Steve Jia	454	C#	2018-09-04 18:42:00
5	李陆屿	487	C#	2019-05-08 12:41:20
6	Esty Crow	493	C#	2022-11-28 12:37:50
7	Kunwei Zhang	502	C#	2018-02-05 01:33:25
8	Hidden user	511	C#	2020-07-07 14:27:38
9	Thomas Norris	521	C#	2019-06-24 21:09:54
10	Simon Lundqvist	523	C#	2020-07-08 11:35:23

#	User	Length	Language	Date
1	Frans Meulenbroeks	115	C++	2025-03-07 21:58:54
2	Syx Pek	178	C++	2016-01-21 08:28:48
3	David Wärn	181	C++	2015-08-28 22:35:38
4	Yogesh Kumar	181	C++	2016-01-16 11:43:41
5	Wei Liang Tan	183	C++	2019-05-23 08:25:24
6	Elias Lolck	187	C++	2022-12-28 20:08:13
7	Antonio Molina Lovett	191	C++	2016-08-05 22:00:27
8	Iles Illés Tamás	192	C++	2019-07-27 12:49:47
9	Herman Karlsson	193	C++	2015-09-09 20:21:24
10	Farid Ayoujil	203	C++	2016-12-25 20:21:19

#	User	Length	Language	Date
1	Francisco Romero	1246	COBOL	2022-01-25 19:54:21

#	User	Length	Language	Date
1	David Cawthon	469	Common Lisp	2019-05-10 00:00:13

#	User	Length	Language	Date
1	Tim Mondorf	551	F#	2021-12-01 14:46:48
2	Jacob Harris Cryer Kragh	786	F#	2022-06-05 13:08:59
3	Patrick Bahr	1984	F#	2021-02-20 13:41:16

#	User	Length	Language	Date
1	Thomas Mailund	198	Go	2020-11-22 17:54:37
2	Hidden user	198	Go	2021-12-17 10:41:24
3	Alp Duman	235	Go	2022-02-28 22:52:34
4	Wojtek Bednarzak	247	Go	2018-04-30 19:35:21
5	Hidden user	289	Go	2022-01-30 20:13:38
6	Bridger Howell	318	Go	2022-03-24 16:53:21
7	Matthew Ling	319	Go	2018-01-17 03:15:50
8	Ng Wei Jie	319	Go	2020-02-17 19:52:50
9	Jerry Zhou	319	Go	2023-03-28 21:29:26
10	Adam Smith	323	Go	2017-03-09 20:53:00

#	User	Length	Language	Date
1	Birk Tjelmeland	169	Haskell	2017-01-09 00:20:15
2	Sebastian Banert	217	Haskell	2023-04-07 20:32:12
3	Sebastian Paaske Tørholm	220	Haskell	2017-02-01 13:51:02
4	Lieven Marchand	220	Haskell	2017-09-10 21:11:41
5	Håkon Flatval	229	Haskell	2018-08-10 13:30:31
6	Jan Hrček	243	Haskell	2020-10-20 16:15:02
7	Hidden user	244	Haskell	2016-07-28 22:32:40
8	Matthew Johnson	256	Haskell	2017-02-02 22:08:59
9	Michael Gilliland	259	Haskell	2020-10-28 20:17:14
10	David Zacek	266	Haskell	2021-05-02 21:40:59

#	User	Length	Language	Date
1	Natalie Longtin	320	Java	2018-09-27 18:44:52
2	Doug Goodman	332	Java	2017-11-11 17:52:21
3	Jason Liu	340	Java	2023-05-05 15:05:39
4	Nanda Thant Sin	349	Java	2018-04-05 06:54:30
5	Hidden user	362	Java	2018-09-27 18:51:36
6	Duncan Page	370	Java	2018-11-20 21:10:34
7	Lim Ting Kai	384	Java	2023-06-07 11:27:42
8	Stela Palii	385	Java	2017-11-14 18:33:04
9	Salomon Smeke	391	Java	2015-10-13 19:01:27
10	Simon Xue	393	Java	2015-11-09 04:00:56

#	User	Length	Language	Date
1	Anthony Czarnecki	397	JavaScript (Node.js)	2024-04-18 20:59:16
2	Tilo Hirsch	456	JavaScript (Node.js)	2020-07-13 17:18:22
3	Howard Tin Chi Chan	515	JavaScript (Node.js)	2021-01-31 23:41:07
4	Hidden user	543	JavaScript (Node.js)	2023-11-19 01:31:21
5	Hovhannes Kantuni	643	JavaScript (Node.js)	2020-09-03 01:35:50
6	Khin Nyunt	697	JavaScript (Node.js)	2021-10-03 08:54:08
7	Ralf Leistad	823	JavaScript (Node.js)	2021-08-11 13:37:05
8	Niamh Limerick	829	JavaScript (Node.js)	2022-02-18 01:02:37
9	tannal	904	JavaScript (Node.js)	2024-01-17 07:25:34
10	John	925	JavaScript (Node.js)	2020-07-28 23:31:39

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	84	JavaScript (SpiderMonkey)	2022-11-05 00:58:41
2	Jimmy Gustafsson	90	JavaScript (SpiderMonkey)	2024-06-12 19:10:38
3	Evan Magill	116	JavaScript (SpiderMonkey)	2024-04-18 23:39:12
4	Zach Tschetter	145	JavaScript (SpiderMonkey)	2023-06-14 20:08:58
5	Peter Menyes	199	JavaScript (SpiderMonkey)	2017-08-25 16:03:49
6	Bjørn Chr. Soltvedt	211	JavaScript (SpiderMonkey)	2016-01-16 12:14:02
7	Cole Rauh	221	JavaScript (SpiderMonkey)	2016-10-06 17:31:34
8	Zachary DeStefano	223	JavaScript (SpiderMonkey)	2018-09-20 02:15:49
9	Dilawar Mahmood	238	JavaScript (SpiderMonkey)	2018-02-15 17:58:00
10	Noah Witte	248	JavaScript (SpiderMonkey)	2024-04-20 15:39:38

#	User	Length	Language	Date
1	Hidden user	302	Julia	2025-04-12 14:37:10
2	Timothy Gaede	734	Julia	2024-03-20 17:11:23

#	User	Length	Language	Date
1	Sergey Jakobsen	254	Kotlin	2021-08-17 10:59:27
2	Dmitry Shostak	355	Kotlin	2018-08-20 12:33:55
3	Einar Kjellback	357	Kotlin	2019-12-03 17:01:32
4	Merih Bora Poçan	364	Kotlin	2020-09-06 20:53:46
5	Dayan Ruben Gonzalez	378	Kotlin	2020-09-28 13:55:42
6	Sarek Høverstad Skotåm	447	Kotlin	2020-10-10 22:12:19
7	Troy Warmboe	511	Kotlin	2020-02-07 01:16:52
8	Jonathan Soo	515	Kotlin	2019-06-25 02:21:15
9	Adam Rankin	714	Kotlin	2023-04-24 02:18:14
10	Phường Lên	723	Kotlin	2020-02-14 04:38:26

#	User	Length	Language	Date
1	Zeheng Li	171	Lua	2023-12-12 23:23:45
2	Shehab Ahmed Hatem	851	Lua	2023-11-16 15:16:18

#	User	Length	Language	Date
1	Hidden user	407	OCaml	2025-06-21 20:25:19

#	User	Length	Language	Date
1	Egor Shchetinin	206	Pascal	2018-01-29 16:43:59
2	Vova Podkorytov	220	Pascal	2018-01-29 17:26:52
3	Hidden user	233	Pascal	2025-08-09 18:42:01
4	David Connolly	978	Pascal	2021-10-06 22:01:56

#	User	Length	Language	Date
1	Saito Ta	90	Perl	2024-04-24 06:48:51

#	User	Length	Language	Date
1	Silvena Lam	176	PHP	2016-02-10 08:03:15
2	Renate	210	PHP	2021-04-22 11:35:51
3	Steven D. Wilson	244	PHP	2016-03-26 02:02:45
4	Jonas Lindenskov Nielsen	343	PHP	2019-10-14 09:45:42
5	Hidden user	422	PHP	2017-06-18 20:49:17
6	Andre Wahyudi	702	PHP	2022-10-18 05:24:00

#	User	Length	Language	Date
1	Hakan Kjellerstrand	438	Prolog	2023-01-28 22:09:58
2	Hadi Qovaizi	15971	Prolog	2016-04-30 14:21:52

#	User	Length	Language	Date
1	Alberto Barquín	131	Python 2	2017-03-19 11:53:24
2	Mathis Hammel	136	Python 2	2017-03-07 12:17:47
3	Thomas Feld	138	Python 2	2019-08-19 12:47:46
4	Jesper Öqvist	144	Python 2	2018-10-19 15:17:51
5	Sigurður Jens Albertsson	146	Python 2	2017-12-05 12:04:20
6	Kasper Borys	152	Python 2	2017-11-13 00:39:54
7	Lars Åström	152	Python 2	2018-11-14 22:18:45
8	João Pedro Alvito	155	Python 2	2018-03-21 19:42:18
9	Miguel Alfageme Sanchez	156	Python 2	2017-02-06 03:38:36
10	Samuel Perkin	159	Python 2	2018-04-02 10:55:45

#	User	Length	Language	Date
1	Clement Oh	77	Python 3	2023-05-24 14:28:14
2	Tommi Järvenpää	82	Python 3	2024-03-19 12:27:25
3	Benjamin Z White	86	Python 3	2023-04-06 11:57:06
4	Hidden user	89	Python 3	2023-11-13 12:17:17
5	Charles Ancheta	93	Python 3	2023-03-17 05:34:30
6	Ahmed Chamseddine	99	Python 3	2024-07-04 15:51:17
7	Si Jie Tan	99	Python 3	2025-12-17 08:50:30
8	이정섭	112	Python 3	2022-07-21 17:53:19
9	Kyle Wells	117	Python 3	2023-10-04 20:13:23
10	Tai Tze Kin	117	Python 3	2024-05-01 14:36:22

#	User	Length	Language	Date
1	Thomas Feld	55	Ruby	2023-01-04 10:39:45
2	dick move	60	Ruby	2022-11-13 19:10:53
3	Russell Ng	72	Ruby	2025-12-04 16:49:46
4	Alexander Bilde Pedersen	87	Ruby	2023-04-23 16:43:08
5	Régis Hanol	127	Ruby	2022-01-05 18:01:17
6	Hidden user	144	Ruby	2019-10-10 10:41:51
7	Hidden user	150	Ruby	2019-03-19 14:45:43
8	Erik Rydbert	164	Ruby	2016-07-11 02:35:28
9	Chenzhang Hu	164	Ruby	2025-09-22 16:38:24
10	Macdara mac an tSionnaigh	177	Ruby	2019-09-30 16:17:13

#	User	Length	Language	Date
1	Vincent Lagerros	354	Rust	2025-01-21 11:52:20
2	Joe Blower	498	Rust	2025-06-22 00:27:31
3	Freek van Keulen	524	Rust	2021-07-13 18:13:38
4	Albert Rise Nielsen	534	Rust	2020-10-13 22:10:37
5	Pankajkumar Patro	547	Rust	2024-08-04 19:49:39
6	Artur Khuziakhmetov	585	Rust	2022-07-28 10:46:48
7	Bas Dirks	629	Rust	2021-12-31 06:00:10
8	Chaoyi Yin	643	Rust	2019-04-01 15:34:11
9	Thomas	695	Rust	2020-12-13 21:36:22
10	Emil Dichmann	699	Rust	2025-08-24 17:42:55

Solution running time distribution