Problem A
Completing the Square — Problem Statistics

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Submissions	3390
Accepted submissions	1960
Submission ratio	57.82%
Authors	1808
Full solves [?]	1653
Full solve Ratio	91.43%

#	User	Runtime	Language	Date
1	Arvid Jonasson	0.01 s	APL	2025-06-27 18:14:38

#	User	Runtime	Language	Date
1	Chenzhang Hu	0.08 s	Bash	2024-04-16 16:32:31

#	User	Runtime	Language	Date
1	Mateja Roglic	0.02 s	C#	2016-12-02 20:25:17
2	Marko Babic	0.02 s	C#	2016-12-16 17:33:23
3	Khin Nyunt	0.02 s	C#	2017-02-22 16:41:04
4	Ludwig Hedeby	0.02 s	C#	2017-11-27 22:15:39
5	Gurpartap Singh Bhatti	0.02 s	C#	2019-09-01 01:50:02
6	Thomas Norris	0.02 s	C#	2020-01-10 21:58:12
7	Yuwono Bangun Nagoro	0.02 s	C#	2020-12-03 17:43:59
8	Denis Benčič	0.02 s	C#	2021-02-16 13:50:46
9	Mikael Fiala-Lundström	0.02 s	C#	2021-05-01 00:24:59
10	Henrik Hallbert	0.02 s	C#	2021-12-09 21:49:16

#	User	Runtime	Language	Date
1	Jacob Harris Cryer Kragh	0.04 s	F#	2022-10-14 12:56:23
2	Emil Boesgaard Nørbjerg	0.08 s	F#	2025-03-21 21:57:21

#	User	Runtime	Language	Date
1	Hidden user	0.02 s	Go	2023-02-13 03:55:25
2	Ian Howell	0.08 s	Go	2019-09-03 19:52:53
3	Magix	0.08 s	Go	2020-12-14 04:44:56
4	Norbert Voelker	0.08 s	Go	2021-04-24 16:00:46

#	User	Runtime	Language	Date
1	Matthew Johnson	0.00 s	Haskell	2017-03-15 17:31:48
2	Antony Lee	0.00 s	Haskell	2017-09-13 23:14:38
3	Morten Lohne	0.00 s	Haskell	2017-09-20 18:34:22
4	Brent Yorgey	0.00 s	Haskell	2017-10-13 06:35:06
5	Simen Endsjø	0.00 s	Haskell	2017-11-14 16:50:41
6	Michał Kopeć	0.00 s	Haskell	2018-01-17 13:31:36
7	Quinn Flavel	0.00 s	Haskell	2022-10-30 20:08:23
8	Håkon Flatval	0.01 s	Haskell	2018-09-05 15:24:54
9	Hidden user	0.01 s	Haskell	2019-08-31 12:14:10
10	Intrets	0.01 s	Haskell	2019-09-06 20:28:30

#	User	Runtime	Language	Date
1	Hidden user	0.05 s	Java	2016-11-05 18:26:01
2	Martijn Muijsers	0.05 s	Java	2016-11-06 22:07:58
3	Finn Lidbetter	0.05 s	Java	2016-11-17 00:31:33
4	James Black	0.05 s	Java	2016-11-17 01:02:50
5	Eskil Jarlskog	0.05 s	Java	2016-12-01 12:28:37
6	Sai Sandeep Vaddi	0.05 s	Java	2017-02-05 19:19:46
7	Njeri Muguthi	0.05 s	Java	2017-04-01 18:40:06
8	Elisabeth Sulmont	0.05 s	Java	2017-04-01 18:42:28
9	William Brigham	0.05 s	Java	2017-04-19 03:28:50
10	Liam Keliher	0.05 s	Java	2017-05-07 08:17:42

#	User	Runtime	Language	Date
1	Christopher Stromberg	0.42 s	JavaScript (Node.js)	2020-02-19 00:08:10
2	Andoko Chandra	0.42 s	JavaScript (Node.js)	2020-10-20 16:36:31
3	Khin Nyunt	0.42 s	JavaScript (Node.js)	2021-09-26 16:28:52
4	Chris Wong	0.42 s	JavaScript (Node.js)	2022-01-13 16:21:21

#	User	Runtime	Language	Date
1	Bjørn Chr. Soltvedt	0.01 s	JavaScript (SpiderMonkey)	2016-11-09 00:03:31
2	Peter Kedemo	0.01 s	JavaScript (SpiderMonkey)	2017-06-07 18:47:12
3	Johannes Jensen	0.02 s	JavaScript (SpiderMonkey)	2020-12-06 08:45:11
4	Christian Pilegaard Cederquist	0.02 s	JavaScript (SpiderMonkey)	2023-01-18 14:21:15
5	Zach Tschetter	0.02 s	JavaScript (SpiderMonkey)	2023-06-24 06:52:52
6	Jimmy Gustafsson	0.02 s	JavaScript (SpiderMonkey)	2024-08-02 08:55:18
7	Peter Menyes	0.03 s	JavaScript (SpiderMonkey)	2021-08-30 14:18:26

#	User	Runtime	Language	Date
1	Timothy Gaede	0.71 s	Julia	2024-04-13 04:52:18

#	User	Runtime	Language	Date
1	Kiel Dowdle	0.11 s	Kotlin	2021-04-19 02:57:12
2	Phường Lên	0.18 s	Kotlin	2019-11-02 17:53:21
3	Adam Rankin	0.19 s	Kotlin	2023-09-02 05:57:41
4	Stefan Kennedy	0.20 s	Kotlin	2017-12-06 12:30:00
5	Neil Harmon	0.21 s	Kotlin	2019-05-16 16:07:49
6	Hidden user	0.21 s	Kotlin	2020-02-25 03:10:42

#	User	Runtime	Language	Date
1	Shehab Ahmed Hatem	0.00 s	Lua	2023-11-14 17:39:34
2	Zeheng Li	0.00 s	Lua	2023-12-08 10:47:22

#	User	Runtime	Language	Date
1	Sebastian Banert	0.00 s	OCaml	2024-08-16 19:40:13

#	User	Runtime	Language	Date
1	Ingemar Ragnemalm	0.00 s	Pascal	2017-08-07 10:41:49

#	User	Runtime	Language	Date
1	Renate	0.01 s	PHP	2021-04-30 17:21:36

#	User	Runtime	Language	Date
1	Andriy Zyevakov	0.01 s	Prolog	2016-11-23 18:58:57

#	User	Runtime	Language	Date
1	Wyatt Wismer	0.02 s	Python 2	2017-01-18 02:48:18
2	Hidden user	0.02 s	Python 2	2017-01-27 05:47:20
3	Vikram Gaur	0.02 s	Python 2	2017-02-04 18:12:52
4	Hubert Teo	0.02 s	Python 2	2017-02-25 10:58:34
5	Kevin Konrad	0.02 s	Python 2	2017-02-26 20:31:13
6	Ashley Stendel	0.02 s	Python 2	2017-04-01 18:13:37
7	Cole Bite	0.02 s	Python 2	2017-04-07 00:32:23
8	Ian Karp	0.02 s	Python 2	2017-04-13 03:47:09
9	Haggai Liu	0.02 s	Python 2	2017-06-17 08:19:13
10	Ken Lee	0.02 s	Python 2	2017-08-01 10:58:51

#	User	Runtime	Language	Date
1	Victor Sui	0.02 s	Python 3	2016-11-05 19:39:55
2	Shaheed Ebrahim	0.02 s	Python 3	2016-11-05 20:24:53
3	Kaleo Shinichi Sato	0.02 s	Python 3	2016-11-05 21:00:33
4	Jan Clarin	0.02 s	Python 3	2016-11-05 21:02:13
5	Isaac Lee	0.02 s	Python 3	2016-11-17 02:08:33
6	Christian Lindeström	0.02 s	Python 3	2017-01-02 20:10:04
7	Asger Hautop Drewsen	0.02 s	Python 3	2017-02-07 14:57:37
8	Savanna Smith	0.02 s	Python 3	2017-02-19 21:22:53
9	Nick Hajek	0.02 s	Python 3	2017-02-20 23:55:41
10	Huang Kenneth	0.02 s	Python 3	2017-03-14 19:46:45

#	User	Runtime	Language	Date
1	Jake Lambdin	0.04 s	Ruby	2018-11-30 00:21:10
2	Kok Dith	0.05 s	Ruby	2021-08-18 10:23:43
3	Conor O'Brien	0.05 s	Ruby	2022-03-08 23:37:14

#	User	Runtime	Language	Date
1	Eric Pinter	0.00 s	Rust	2021-05-23 20:13:46
2	Bas Dirks	0.00 s	Rust	2022-02-01 17:33:36
3	Sindbad Walter	0.00 s	Rust	2023-11-18 02:37:24
4	Louis Bouchard	0.00 s	Rust	2024-11-15 00:05:35
5	Isak Jägberg	0.00 s	Rust	2024-11-19 12:26:22
6	Adam Yaser Sweilem	0.00 s	Rust	2025-03-21 18:23:10
7	Vincent Lagerros	0.00 s	Rust	2025-08-09 21:25:55

#	User	Length	Language	Date
1	Arvid Jonasson	114	APL	2025-06-27 18:14:38

#	User	Length	Language	Date
1	Chenzhang Hu	1460	Bash	2024-04-16 16:32:31

#	User	Length	Language	Date
1	Hidden user	410	C	2017-05-03 13:09:58
2	klimisnotmilk	510	C	2024-03-09 12:09:59
3	Olav Røthe Bakken	552	C	2017-09-20 17:47:25
4	Hidden user	591	C	2021-06-12 10:47:20
5	Sambit Palit	592	C	2020-10-21 19:58:07
6	Ivan Petrov	662	C	2019-07-09 14:50:34
7	louis lin	712	C	2021-02-01 12:54:38
8	Dick Jessen William	787	C	2019-09-15 12:19:23
9	Naveen Kumar S	853	C	2025-04-14 08:06:45
10	Sebastian Hessleklint	924	C	2023-10-11 11:19:06

#	User	Length	Language	Date
1	Thomas Norris	1022	C#	2020-01-10 21:58:12
2	Mateja Roglic	1275	C#	2016-12-02 20:25:17
3	Mouhamad M.M	1428	C#	2025-08-30 19:44:36
4	Henrik Hallbert	1458	C#	2021-12-09 21:49:16
5	Göran Andersson	1544	C#	2022-05-17 17:28:19
6	Khin Nyunt	1779	C#	2017-02-22 16:41:04
7	Denis Benčič	1849	C#	2021-02-16 13:50:46
8	Marko Babic	2021	C#	2016-12-16 18:11:09
9	Yuwono Bangun Nagoro	2055	C#	2020-12-03 17:43:59
10	Ludwig Hedeby	2889	C#	2017-11-27 22:15:39

#	User	Length	Language	Date
1	Ganapathy Sanath Balaji	367	C++	2019-08-08 13:26:31
2	Way Tan	368	C++	2018-11-20 16:17:29
3	Johan Wind	380	C++	2018-04-01 01:34:53
4	Rafael Kristoforus Yanto	391	C++	2025-04-15 06:01:46
5	Clement Oh	392	C++	2023-08-12 19:27:49
6	Yeung Man Tsung	393	C++	2023-01-09 12:00:35
7	Frans Meulenbroeks	401	C++	2024-10-08 09:50:03
8	Spencer Lee	413	C++	2024-01-19 02:09:01
9	Pedro Sponchiado	414	C++	2018-11-10 16:23:09
10	Ásmundur Óskar Ásmundsson	418	C++	2019-03-30 02:03:27

#	User	Length	Language	Date
1	Jacob Harris Cryer Kragh	1246	F#	2022-10-14 12:56:23
2	Emil Boesgaard Nørbjerg	2840	F#	2025-03-21 21:57:21

#	User	Length	Language	Date
1	Hidden user	844	Go	2023-02-13 03:55:25
2	Norbert Voelker	1122	Go	2021-04-24 16:00:46
3	Magix	1508	Go	2020-12-14 04:44:56
4	Ian Howell	1612	Go	2019-09-03 19:52:53

#	User	Length	Language	Date
1	Håkon Flatval	427	Haskell	2018-09-05 15:24:54
2	Hidden user	565	Haskell	2019-12-22 18:13:21
3	Antony Lee	695	Haskell	2017-09-13 23:14:38
4	Jan Hrček	698	Haskell	2021-03-13 13:56:00
5	Brent Yorgey	716	Haskell	2017-10-13 06:35:06
6	Joshua Coward	721	Haskell	2022-02-10 16:45:15
7	Rudy Matela	792	Haskell	2024-05-09 12:51:54
8	Michał Kopeć	826	Haskell	2018-01-17 13:31:36
9	Steinar Simonnes	878	Haskell	2024-03-22 17:38:01
10	Matthew Johnson	1061	Haskell	2017-03-15 17:37:37

#	User	Length	Language	Date
1	Andrew Davis	675	Java	2017-01-18 01:29:16
2	Hidden user	709	Java	2017-02-26 20:10:28
3	Arup Ratan Guha	716	Java	2021-10-05 04:21:48
4	Nicolas Null	742	Java	2020-02-12 06:33:51
5	Zemzgui Youness	744	Java	2018-08-19 19:00:10
6	Doug Goodman	756	Java	2017-09-23 17:22:07
7	Merten Bohn	791	Java	2022-10-30 12:34:29
8	Isaac Mammel	809	Java	2023-09-09 21:13:33
9	Jeffrey Gan	831	Java	2023-11-13 22:21:31
10	Mohammad Naufal Hazim Bin Saharudin	831	Java	2025-05-28 22:53:24

#	User	Length	Language	Date
1	Andoko Chandra	1238	JavaScript (Node.js)	2020-10-20 16:36:31
2	Khin Nyunt	1389	JavaScript (Node.js)	2021-09-26 16:28:52
3	Chris Wong	1396	JavaScript (Node.js)	2022-01-13 16:21:21
4	Christopher Stromberg	3602	JavaScript (Node.js)	2020-02-19 00:08:10

#	User	Length	Language	Date
1	Jimmy Gustafsson	412	JavaScript (SpiderMonkey)	2024-08-02 08:55:18
2	Christian Pilegaard Cederquist	516	JavaScript (SpiderMonkey)	2023-01-18 14:21:15
3	Bjørn Chr. Soltvedt	575	JavaScript (SpiderMonkey)	2016-11-09 00:03:31
4	Peter Kedemo	657	JavaScript (SpiderMonkey)	2017-06-07 18:47:12
5	Johannes Jensen	709	JavaScript (SpiderMonkey)	2020-12-06 08:45:11
6	Peter Menyes	773	JavaScript (SpiderMonkey)	2021-08-30 14:18:26
7	Zach Tschetter	1093	JavaScript (SpiderMonkey)	2023-06-24 06:52:52

#	User	Length	Language	Date
1	Timothy Gaede	1542	Julia	2024-04-13 04:52:18

#	User	Length	Language	Date
1	Adam Rankin	604	Kotlin	2023-09-02 05:57:41
2	Stefan Kennedy	891	Kotlin	2017-12-06 12:30:00
3	Phường Lên	934	Kotlin	2019-11-02 17:53:21
4	Hidden user	1190	Kotlin	2020-02-25 03:10:42
5	Neil Harmon	1878	Kotlin	2019-05-16 16:07:49
6	Kiel Dowdle	2002	Kotlin	2021-04-19 02:57:12

#	User	Length	Language	Date
1	Zeheng Li	370	Lua	2023-12-08 10:47:22
2	Shehab Ahmed Hatem	1144	Lua	2023-11-14 17:39:34

#	User	Length	Language	Date
1	Sebastian Banert	798	OCaml	2024-08-16 19:40:13

#	User	Length	Language	Date
1	Ingemar Ragnemalm	1932	Pascal	2017-08-07 10:41:49

#	User	Length	Language	Date
1	Renate	577	PHP	2021-04-30 17:21:36

#	User	Length	Language	Date
1	Andriy Zyevakov	1064	Prolog	2016-11-23 18:58:57

#	User	Length	Language	Date
1	Lars Åström	359	Python 2	2019-04-25 21:21:13
2	Martin Wan	360	Python 2	2017-11-10 00:19:21
3	Andrei Stoica	380	Python 2	2017-11-25 11:17:54
4	Johan Lyts	380	Python 2	2019-05-13 14:04:51
5	Andreas Björklund	390	Python 2	2020-03-21 15:19:03
6	Cole Bite	391	Python 2	2017-04-07 00:32:23
7	Hubert Teo	413	Python 2	2017-02-25 10:58:34
8	Haggai Liu	418	Python 2	2017-06-17 08:19:13
9	Juho Lee	419	Python 2	2017-12-06 18:05:54
10	Måns Magnusson	437	Python 2	2019-04-26 20:09:57

#	User	Length	Language	Date
1	Thibault Raffaillac	152	Python 3	2024-07-29 23:27:28
2	Michael Goldwasser	164	Python 3	2024-08-22 00:07:56
3	Wouter Dijkstra	192	Python 3	2022-06-13 10:54:00
4	Ahmed Chamseddine	201	Python 3	2024-08-14 00:01:56
5	Noah Hessen Bjerke	210	Python 3	2022-12-26 19:03:59
6	Clement Oh	243	Python 3	2023-11-23 06:13:49
7	Kenneth Jensen	251	Python 3	2022-07-07 18:07:14
8	Ryll Åman	254	Python 3	2025-07-03 11:22:27
9	Alexandre Charland	271	Python 3	2025-02-13 19:28:07
10	Tan Yi Long	281	Python 3	2025-04-30 01:31:55

#	User	Length	Language	Date
1	Kok Dith	586	Ruby	2021-08-18 10:23:43
2	Conor O'Brien	602	Ruby	2022-03-08 23:37:14
3	Jake Lambdin	3435	Ruby	2018-11-30 00:21:10

#	User	Length	Language	Date
1	Vincent Lagerros	706	Rust	2025-08-09 21:25:55
2	Bas Dirks	959	Rust	2022-02-01 17:33:36
3	Adam Yaser Sweilem	1552	Rust	2025-03-21 18:23:10
4	Sindbad Walter	1565	Rust	2023-11-18 02:37:24
5	Eric Pinter	1835	Rust	2021-05-23 20:13:46
6	Isak Jägberg	1852	Rust	2024-11-19 12:26:22
7	Louis Bouchard	2251	Rust	2024-11-15 00:05:35

Solution running time distribution