Problem authors

Problem Source	Problems	Average Difficulty
Jason Pham	1	3.6Medium
Javier Gómez Serrano	3	6.1Hard
Jayden Pahukula	4	2.2Easy
Jean Niklas L'orange	42	5.4Medium
Jean-Christophe Filliâtre	1	5.7Hard
Jeff Ifland	19	4.2Medium
Jeff Kinne	1	1.5Easy
Jeffrey Peng	1	6.5Hard
Jennifer Lhoták	1	7.3Hard
Jennifer Shimada	1	6.6Hard
Jeroen Bransen	9	3.5Medium
Jeroen de Jong	1	5.6Hard
Jerry Li	3	6.1Hard
Jesper Öqvist	4	6Hard
Jevgēnijs Vihrovs	1	5Medium
Jiacheng Wu	2	3.6Medium
Jiju Poovvancheri	3	4.9Medium
Jim Grimmett	10	5.1Medium
Jimmy Ding	1	5.1Medium
Jimmy Mårdell	21	5.8Hard
Jingbang Chen	1	7.1Hard
Jingbo Shang	8	5.1Medium
Jodi Tims	1	1.5Easy
Joel Andersson	1	1.9Easy
Johan Sannemo	178	5Medium
John Bonomo	69	4.8Medium
John Buck	4	2.7Easy
John Cigas	7	2.2Easy
John Dethridge	4	5.8Hard
John Hedin	1	2Easy
John Henke	6	3.9Medium
John Keyser	2	6.3Hard
John Zheng	7	5.5Hard
Jon Ander Gómez	3	4.9Medium
Jon Marius Venstad	10	5.2Medium
Jonatan Nilsson	1	6.3Hard
Jonathan Cederlund	3	3.5Medium
Jonathan Chong	4	2.7Easy
Jonathan Hallström	6	3.9Medium
Jonathan Lööv	1	2.7Easy
Jonathan Shen	6	4.4Medium
Jonathon Robel	2	4.8Medium
Joran van Apeldoorn	1	5.1Medium
Jordan Newport	2	4.6Medium
Joris van Rantwijk	5	5.3Medium
Jorke de Vlas	18	4.7Medium
Josee Tasse	11	3.3Medium
Josef Cibulka	1	7.5Hard
Joseph Claver	3	4.4Medium
Joseph Durie	11	5.2Medium
Joseph McKinsey	1	5.7Hard
Joseph Meleshko	2	5Medium
Joseph Swernofsky	3	3.9Medium
Josh Brown-Kramer	1	4.3Medium
Josh Taylor	2	4.9Medium
Joshua Andersson	40	5.3Medium
Joshua Moerman	3	6.3Hard
Joshua T. Guerin	9	3.2Medium
Josse van Dobben de Bruyn	7	3.8Medium
José Paulo Leal	1	4.1Medium
Jozef Šiška	1	3.4Medium
Julia Mårtensson	10	4.9Medium
Julian Baldus	3	5.8Hard
Julian Dörfler	1	5.8Hard
Julian Neeleman	1	7.4Hard
Julietta Rozin	1	1.4Easy
Julius Thunström	2	5.8Hard
Junbin Teng	1	7.5Hard
Justas Klimas	2	6.3Hard
Justas Klimavičius	1	4.4Medium
Justin Li	5	5.1Medium
Justin Park	1	2.1Easy
Jón Steinn Elíasson	2	3.7Medium
Kai Chen	3	4.3Medium
Karl Johan Sande Heimark	9	5Medium
Karl Lundstig	1	1.5Easy
Kathleen Ericson	9	3.2Medium
Katie Chang	1	2.7Easy
Keenan Schott	1	1.4Easy
Kelly Dance	9	5Medium
Kent Williams-King	4	6.7Hard
Keshav Bhadauria	1	2.4Easy
Kevin Chen	4	6.2Hard
Kevin Kinney	1	3.3Medium
Kevin Li	3	6.2Hard
Khaled Ismaeel	1	3.8Medium
Kimberly Brown	2	4.9Medium
Konráð Elí Sigurgeirsson	9	2.6Easy
Kostiantyn Denysov	1	4.7Medium
Kriangsiri Malasri	9	4.4Medium
Kristof Unterweger	1	5.6Hard
Kristoffer Arnsfelt Hansen	1	6Hard
Kristoffer Æsøy	3	4.8Medium
Kuan Wei Heng	1	3.5Medium
Kwee Lung Sin	3	7.3Hard
Kyle H	1	8.4Hard
Kyle See	2	6.1Hard
Lalitha Kuppa	3	3.6Medium
Lammert Westerdijk	1	1.7Easy
Lap Chi Lau	1	5.5Hard

1...4 5 6...10