Problem I
Tight-Fit Sudoku — Problem Statistics

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Submissions	538
Accepted submissions	167
Submission ratio	31.04%
Authors	157
Full solves [?]	124
Full solve Ratio	78.98%

#	User	Runtime	Language	Date
1	Ivan Petrov	0.00 s	C	2017-12-12 09:03:48

#	User	Runtime	Language	Date
1	Yunfan Zhang	0.07 s	Go	2018-12-21 12:26:58
2	Erlend Fonnes	0.08 s	Go	2021-04-04 23:26:34

#	User	Runtime	Language	Date
1	Arnav Sastry	0.06 s	Java	2017-10-23 08:29:58
2	Cornelius Jacob Kojo Bartels	0.06 s	Java	2025-11-05 22:21:00
3	Weitao Li	0.08 s	Java	2017-10-23 15:19:22
4	Ethan Arnold	0.08 s	Java	2017-10-23 18:57:14
5	Doug Goodman	0.08 s	Java	2018-05-31 16:31:20
6	Tobias Glimmerfors	0.08 s	Java	2018-12-04 18:29:23
7	Bjørn Dons	0.09 s	Java	2018-12-25 23:44:55
8	Brage Alvsvåg	0.09 s	Java	2021-04-03 02:42:52
9	Xuehui Chen	0.10 s	Java	2018-08-23 06:21:47
10	Mitch Price	0.11 s	Java	2017-10-24 22:52:22

#	User	Runtime	Language	Date
1	Caleb Early	0.07 s	JavaScript (Node.js)	2025-11-05 04:25:12

#	User	Runtime	Language	Date
1	Danny Mittal	0.15 s	Kotlin	2020-10-09 16:51:38
2	Cheatahh	0.24 s	Kotlin	2025-06-03 16:46:45

#	User	Runtime	Language	Date
1	Godmar Back	0.11 s	Python 2	2019-01-10 18:24:10
2	Agis Daniels	0.13 s	Python 2	2020-02-28 15:53:01
3	Casper Rysgaard	0.15 s	Python 2	2018-10-09 20:02:16
4	Thomas Feld	0.15 s	Python 2	2019-11-13 12:11:54
5	Adam Barth	0.56 s	Python 2	2017-10-21 23:52:11

#	User	Runtime	Language	Date
1	Hidden user	0.14 s	Python 3	2024-03-24 18:37:09
2	Ahmed Chamseddine	0.14 s	Python 3	2025-04-11 11:31:35
3	Agis Daniels	0.15 s	Python 3	2020-02-28 15:52:00
4	Joshua Coward	0.16 s	Python 3	2020-03-11 16:31:04
5	Oskar Haarklou Veileborg	0.16 s	Python 3	2020-11-14 23:32:22
6	Tim Brouwer	0.17 s	Python 3	2025-06-04 13:02:02
7	Haakon Benning	0.19 s	Python 3	2021-04-06 21:15:55
8	Kaverappa O T	0.21 s	Python 3	2021-08-09 17:28:19
9	Hidden user	0.24 s	Python 3	2021-04-15 10:57:48
10	Jared Gillespie	0.25 s	Python 3	2017-10-27 03:35:24

#	User	Length	Language	Date
1	Ivan Petrov	4370	C	2017-12-12 09:03:48

#	User	Length	Language	Date
1	Mara	1132	C++	2019-09-19 11:50:49
2	Goutham Rajendran	1752	C++	2017-10-21 21:40:16
3	Benjamin Rubio Orellana	1882	C++	2020-04-18 21:35:56
4	Nano Monardes	2034	C++	2021-05-08 02:29:01
5	Phuong Tran	2117	C++	2022-01-15 21:26:49
6	Jiarui Zhang	2121	C++	2017-10-21 20:58:18
7	Dion Stephan Ong	2161	C++	2020-12-24 02:56:03
8	Hidden user	2162	C++	2020-01-09 20:10:43
9	Thomas Yang	2166	C++	2023-02-19 21:58:08
10	Yu Xifan	2171	C++	2017-10-21 23:30:14

#	User	Length	Language	Date
1	Erlend Fonnes	5102	Go	2021-04-04 23:26:34
2	Yunfan Zhang	5440	Go	2018-12-21 12:26:58

#	User	Length	Language	Date
1	Ali Pervaiz	2914	Java	2020-09-19 23:26:20
2	Jiru Xu	3175	Java	2017-10-22 00:08:25
3	Doug Goodman	3547	Java	2018-05-31 16:31:20
4	鹿目圆	3621	Java	2018-11-14 04:27:37
5	Xuehui Chen	3899	Java	2018-08-23 06:21:47
6	Andrew Polizzotto	3936	Java	2019-10-02 05:42:39
7	Peter Steele	4352	Java	2017-10-21 23:23:57
8	Hidden user	4504	Java	2020-10-14 05:22:00
9	Mitch Price	4738	Java	2017-10-24 22:52:22
10	Ethan Arnold	5261	Java	2017-10-23 18:57:14

#	User	Length	Language	Date
1	Caleb Early	13480	JavaScript (Node.js)	2025-11-05 04:25:12

#	User	Length	Language	Date
1	Danny Mittal	2579	Kotlin	2020-10-09 16:51:38
2	Cheatahh	7100	Kotlin	2025-06-03 16:46:45

#	User	Length	Language	Date
1	Thomas Feld	1502	Python 2	2019-11-13 12:11:54
2	Godmar Back	2075	Python 2	2019-01-10 18:24:10
3	Agis Daniels	2527	Python 2	2020-02-28 15:59:51
4	Casper Rysgaard	3301	Python 2	2018-10-09 20:02:16
5	Adam Barth	5826	Python 2	2017-10-21 23:52:11

#	User	Length	Language	Date
1	Oskar Haarklou Veileborg	1232	Python 3	2020-11-14 23:32:22
2	Joshua Coward	1561	Python 3	2020-03-11 16:31:04
3	Nicholas Russell Saerang	1639	Python 3	2023-09-04 01:35:01
4	Hidden user	1787	Python 3	2021-04-15 10:57:48
5	Hidden user	1828	Python 3	2024-03-24 11:18:26
6	Camilo Velandia	2018	Python 3	2017-11-04 21:00:59
7	Agis Daniels	2372	Python 3	2020-02-28 16:07:29
8	Hidden user	2401	Python 3	2021-04-07 16:15:26
9	Tim Brouwer	2688	Python 3	2025-06-04 13:02:02
10	Levi Tourinho	2812	Python 3	2025-04-10 14:17:41

Solution running time distribution