Problem I
Palindrome Substring — Problem Statistics

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Submissions	2323
Accepted submissions	848
Submission ratio	36.50%
Authors	692
Full solves [?]	556
Full solve Ratio	80.35%

#	User	Runtime	Language	Date
1	Mirel Cosulschi	0.05 s	C	2023-12-16 19:02:28
2	Anton Siderud	0.28 s	C	2020-04-01 20:10:54
3	Bernd Schmidt	0.51 s	C	2017-06-16 17:30:47
4	Ioannis Br	1.82 s	C	2023-01-21 15:25:35

#	User	Runtime	Language	Date
1	Jinx	0.49 s	C#	2017-10-19 17:50:55
2	Donald Heppner	0.76 s	C#	2017-10-21 03:17:26
3	Denys Vega	0.81 s	C#	2021-04-16 05:37:24
4	Tom Ilestrand	0.99 s	C#	2019-02-27 19:59:28
5	Bartosz Starczewski	1.04 s	C#	2017-10-20 00:24:02

#	User	Runtime	Language	Date
1	Phu Lee Thanh	0.00 s	C++	2020-07-22 00:36:38
2	Thomas Meeks	0.00 s	C++	2023-08-08 01:22:41
3	Jai Ansh Singh Bindra	0.00 s	C++	2025-11-03 10:14:37
4	Muhammad Rais Fathin Mudzakir	0.01 s	C++	2017-01-28 07:49:48
5	Hidden user	0.01 s	C++	2021-05-07 20:37:53
6	Likhon	0.01 s	C++	2021-11-04 18:04:28
7	Lawry Sorenson	0.01 s	C++	2025-02-20 18:27:37
8	Bjarki Ágúst Guðmundsson	0.02 s	C++	2016-03-29 15:19:37
9	Lazar Ilic	0.02 s	C++	2021-06-23 21:44:48
10	ANIK ISLAM	0.02 s	C++	2025-10-11 13:04:11

#	User	Runtime	Language	Date
1	Julian Duniec	0.05 s	Go	2023-09-07 15:42:34
2	Michael Laszlo	0.11 s	Go	2016-10-21 21:01:14

#	User	Runtime	Language	Date
1	David Brink	0.16 s	Java	2019-09-15 13:18:23
2	Sejong Jang	0.32 s	Java	2021-12-03 23:41:42
3	José Vander Meulen	0.39 s	Java	2018-02-07 19:14:25
4	Paulo Vilela	0.50 s	Java	2017-03-23 16:25:22
5	Thijs Mangelsdorf	0.50 s	Java	2025-11-08 07:05:17
6	Taras Romanyuk	0.53 s	Java	2024-11-11 15:44:30
7	Andreas Wassum	0.54 s	Java	2017-05-20 16:14:57
8	Kadin Tang	0.54 s	Java	2020-12-28 08:25:50
9	Paul Boddington	0.56 s	Java	2016-05-13 23:47:24
10	William Fiset	0.56 s	Java	2017-01-07 18:45:45

#	User	Runtime	Language	Date
1	Michael Laszlo	0.28 s	JavaScript (SpiderMonkey)	2016-10-21 21:01:55
2	Piotr Karpala	0.37 s	JavaScript (SpiderMonkey)	2017-10-20 04:25:27
3	Bjørn Chr. Soltvedt	0.49 s	JavaScript (SpiderMonkey)	2016-08-20 16:07:48
4	Christian Pilegaard Cederquist	0.73 s	JavaScript (SpiderMonkey)	2023-08-15 14:44:02

#	User	Runtime	Language	Date
1	Timothy Gaede	1.15 s	Julia	2024-09-04 15:57:25

#	User	Runtime	Language	Date
1	Phường Lên	0.83 s	Kotlin	2020-03-16 15:56:30
2	Adam Rankin	1.08 s	Kotlin	2023-09-12 18:49:41
3	Hidden user	1.14 s	Kotlin	2020-03-17 07:37:08

#	User	Runtime	Language	Date
1	Silvena Lam	0.34 s	PHP	2018-03-04 17:18:21

#	User	Runtime	Language	Date
1	Minh Phan Duc Nhat	0.07 s	Python 2	2018-02-12 03:12:21
2	Johann Ly	0.46 s	Python 2	2018-07-09 01:37:14
3	Jesper Öqvist	0.47 s	Python 2	2018-08-23 05:34:55
4	Lars Åström	0.47 s	Python 2	2019-04-26 16:41:30
5	Andreas Björklund	0.48 s	Python 2	2021-11-07 17:22:15
6	Christopher Nathaniel Walker	0.49 s	Python 2	2016-10-10 00:22:07
7	Martin Wan	0.49 s	Python 2	2017-08-11 06:39:12
8	Hermon Mulat	0.49 s	Python 2	2017-11-17 01:52:35
9	Erik Tjøswold	0.49 s	Python 2	2018-03-03 17:29:02
10	Kyle Verhoog	0.50 s	Python 2	2016-02-26 17:50:05

#	User	Runtime	Language	Date
1	Lawry Sorenson	0.07 s	Python 3	2025-10-15 18:16:57
2	David	0.07 s	Python 3	2025-10-15 18:21:41
3	Peter Ton	0.10 s	Python 3	2025-10-11 18:37:26
4	Andrew Jergensen	0.10 s	Python 3	2025-10-16 01:30:52
5	Pierre	0.11 s	Python 3	2023-01-05 21:56:36
6	Alejandro Escobar	0.11 s	Python 3	2023-04-03 23:31:25
7	Jason Jiang	0.11 s	Python 3	2023-04-04 00:54:10
8	David Brink	0.12 s	Python 3	2017-02-20 18:02:20
9	Benjamin Z White	0.12 s	Python 3	2023-07-23 19:38:44
10	Josh Wiseman	0.12 s	Python 3	2025-02-20 19:47:06

#	User	Runtime	Language	Date
1	Nate Yourchuck	0.56 s	Ruby	2016-08-06 17:53:34
2	Thomas Feld	1.06 s	Ruby	2023-08-22 11:04:35

#	User	Length	Language	Date
1	Mirel Cosulschi	1839	C	2022-12-01 08:40:30
2	Anton Siderud	1988	C	2020-04-01 20:03:52
3	Bernd Schmidt	2093	C	2017-06-16 17:30:47
4	Ioannis Br	2355	C	2023-01-21 15:25:35

#	User	Length	Language	Date
1	Denys Vega	1072	C#	2019-11-05 14:02:48
2	Donald Heppner	1599	C#	2017-10-21 03:17:26
3	Bartosz Starczewski	2004	C#	2017-10-20 00:24:02
4	Tom Ilestrand	2072	C#	2019-02-27 19:59:28
5	Jinx	6599	C#	2017-10-19 17:50:55

#	User	Length	Language	Date
1	Hidden user	500	C++	2022-04-06 09:21:48
2	Herman Karlsson	522	C++	2016-12-29 00:09:02
3	Tomás Cariño	524	C++	2016-12-27 05:01:27
4	Lee Zheng Han	602	C++	2022-12-08 09:06:22
5	Markus Mathiasen	606	C++	2024-06-27 12:34:35
6	Moncef Mhasni	612	C++	2016-08-06 13:21:25
7	Mugeon Kim	613	C++	2024-12-18 04:24:06
8	Vedang Gaonkar	619	C++	2019-09-06 03:12:00
9	Vicky Nguyen	629	C++	2020-12-25 04:51:47
10	William Gan	630	C++	2017-12-19 09:41:56

#	User	Length	Language	Date
1	Julian Duniec	762	Go	2023-09-07 15:42:34
2	Michael Laszlo	1723	Go	2016-10-21 21:01:14

#	User	Length	Language	Date
1	Doug Goodman	621	Java	2018-03-31 13:56:57
2	Michael Volk	823	Java	2019-05-08 02:24:25
3	Tianyu Liu	824	Java	2018-07-02 23:44:08
4	Hidden user	892	Java	2023-03-08 02:30:11
5	Oliver Richardson	897	Java	2016-10-20 19:10:24
6	Bobby Wang	902	Java	2018-01-31 04:53:00
7	Paul Boddington	918	Java	2016-05-13 23:47:24
8	Hidden user	1020	Java	2023-02-21 15:57:42
9	Joel Gritter	1070	Java	2020-10-05 23:28:41
10	Matt Kendzior	1084	Java	2016-01-14 20:11:45

#	User	Length	Language	Date
1	Christian Pilegaard Cederquist	641	JavaScript (SpiderMonkey)	2023-08-15 14:41:42
2	Bjørn Chr. Soltvedt	819	JavaScript (SpiderMonkey)	2016-08-20 16:07:48
3	Michael Laszlo	1603	JavaScript (SpiderMonkey)	2016-10-21 21:01:55
4	Piotr Karpala	3162	JavaScript (SpiderMonkey)	2017-10-20 04:25:27

#	User	Length	Language	Date
1	Timothy Gaede	1190	Julia	2024-09-04 15:57:25

#	User	Length	Language	Date
1	Phường Lên	861	Kotlin	2020-03-16 15:56:30
2	Adam Rankin	1310	Kotlin	2023-09-12 18:49:41
3	Hidden user	1648	Kotlin	2020-03-17 07:37:08

#	User	Length	Language	Date
1	Silvena Lam	1382	PHP	2018-03-04 17:02:53

#	User	Length	Language	Date
1	Matt Bonsall	305	Python 2	2016-10-20 15:31:33
2	Ciara Godwin	418	Python 2	2018-04-05 19:37:54
3	Johan Lyts	462	Python 2	2019-03-29 14:28:24
4	Andreas Björklund	493	Python 2	2021-11-07 17:22:15
5	Jesper Öqvist	536	Python 2	2018-08-23 05:34:55
6	Christian Rachmaninoff	583	Python 2	2016-10-21 00:34:18
7	Martin Wan	631	Python 2	2017-08-11 06:39:12
8	Martin Stensgård	682	Python 2	2016-11-28 02:30:00
9	Johann Ly	689	Python 2	2018-07-09 01:37:14
10	Kyle Verhoog	726	Python 2	2016-02-26 17:50:05

#	User	Length	Language	Date
1	Thomas Feld	117	Python 3	2023-08-22 11:24:21
2	Benjamin Z White	196	Python 3	2023-07-23 20:25:55
3	Rezz Tony Piraman	323	Python 3	2022-12-29 15:42:49
4	Tom Chauvel	382	Python 3	2023-12-30 20:30:34
5	Nicholas Russell Saerang	387	Python 3	2024-01-17 14:23:42
6	Russell	387	Python 3	2025-09-21 13:34:23
7	Oskar Haarklou Veileborg	389	Python 3	2020-02-07 12:21:19
8	Iman Khodadi	422	Python 3	2022-01-30 07:42:12
9	Matic Hvala	436	Python 3	2021-02-17 12:55:52
10	Hrant Hovhannisyan	457	Python 3	2025-08-07 06:07:41

#	User	Length	Language	Date
1	Thomas Feld	102	Ruby	2023-08-22 11:08:27
2	Nate Yourchuck	1815	Ruby	2016-08-06 17:53:34

Solution running time distribution