Problem Authors

Problem author Problems Average Difficulty
Zvonimir Medić 1 6.4
Ziyi Tang 2 4.0
Zachary Geier 1 6.4
Zachary Friggstad 18 4.5
Yujie An 1 6.7
Yuen Chak Fai 2 4.6
Ylvis 1 2.1
Yingtao Tian 3 5.3
Xiayuan Suo 1 1.6
Xiaoyuan Suo 2 3.9
Xiaomin Chen 5 5.2
Wing-Kin Sung 1 6.5
William Gan Wei Liang 2 7.0
William Fiset 3 5.8
Wenli Looi 5 3.5
Walter Guttmann 1 5.8
Volodymyr Lyubinets 5 5.9
Vlado Keselj 1 6.2
Vladimir Valyukh 3 6.7
Victor Loh Bo Huai 1 7.4
Vegard Sjonfjell 2 4.9
Vaibhav Tulsyan 1 4.8
Unnar Freyr Erlendsson 1 1.9
University of Dallas 1 5.5
Ulle Endriss 1 5.4
Ulf Lundström 21 4.6
Tung Kam Chuen 10 6.2
Truls Amundsen Bjørklund 1 1.3
Truls A. Björklund 1 2.4
Troy Vasiga 3 4.1
Torstein Strømme 7 4.3
Torbjørn Morland 21 4.8
Tony Cai 12 4.7
Tonko Sabolčec 1 3.8
Tom Verhoeff 1 3.5
Tom Rokicki 1 3.5
Tommy Färnqvist 3 4.4
Tom Fuller 1 3.1
Tómas Ken Magnússon 3 3.9
Tobias Werth 6 4.0
Timon Knigge 11 5.1
Thomasz Idziaszek 1 4.5
Thomas Lidbetter 4 6.2
Thomas Beuman 4 7.1
Thijs van Ommen 1 7.5
Tan Jun An 2 5.8
Syx Pek 7 5.4
Swen Gaudl 1 5.4
Svetoslav Tzvetkov 1 8.6
Suhendry Effendy 1 1.6
Stuart Hansen 1 3.9
Stjepan Požgaj 1 5.0
Steven Zeil 11 6.1
Steven Halim 12 3.9
Stein Norheim 7 6.0
Stefan Toman 1 3.4
Stefan Pszczolkowski 1 1.7
Stefan Kraus 1 3.1
Stefan Büttcher 3 5.3
Spencer Pao 1 1.9
Sonny Chan 2 4.3
Simon Lindholm 5 7.5
Simon Klein 1 5.1
Silviu Maniu 2 3.1
Sidney Cadot 1 4.0
Sidhant Bansal 2 4.9
Shiplu Hawlader 1 4.7
Shahriar Manzoor 1 5.0
Shaheed Ebrahim 1 3.1
Shafaet Ashraf 1 9.5
Serikzhan S. Kazi 1 5.1
Serikzhan Kazi 1 4.6
Sérgio Crisóstomo 2 3.8
Sean McCulloch 2 7.6
Scott McGowan 1 4.0
Sander Alewijnse 1 8.6
Samuel Tardieu 1 7.4
Ryan Marshall 5 3.8
Ryan Henning 2 5.6
Rujia Liu 5 4.9
Rudy van Vliet 1 6.1
Roger Henriksson 1 4.6
Robin Lee 18 5.5
Robin Christopher Yu 18 6.3
Robert Pilgrim 1 2.8
Robert McGorman 1 2.0
Robert Hochberg 9 4.9
R. Marshall 2 2.9
Richard Peng 5 5.4
Raymond van Bommel 7 5.2
Raymond Kang Seng Ing 1 5.1
Raphaël Marinier 2 5.5
Ranald Lam Yun Shao 1 5.0
Ragnar Nevries 1 7.6
Ragnar Groot Koerkamp 10 5.2
Prabhakar Ragde 2 5.4
Piotr Zielinski 1 7.0
Piotr Rudnicki 18 4.2
Piotr Micek 1 6.7
Philip Wellnitz 1 6.9
Petter Elvevoll 2 3.9
Petr Mitrichev 1 6.9
Peter Steele 3 7.1
Peter Košinár 1 7.9
Peter Kluit 1 6.9
Peter Høyer 1 4.7
Per Austrin 103 5.5
Peilin Zhong 1 5.0
Pehr Söderman 13 4.9
Pedro Vasconcelos 4 4.4
Pedro Ribeiro 1 4.8
Pedro Guerreiro 3 4.6
Paweł Komosa 1 8.0
Paweł Idziak 1 2.6
Pawel Gawrychowski 2 7.3
Pavel Petrovic 1 6.0
Paul Wild 3 5.3
Pär Söderhjelm 1 6.5
Pål Grønås Drange 5 4.8
Pål G. Drange 4 6.5
Paco Álvaro 1 7.1
Øyvind Haarberg 4 4.4
Øyvind Grotmol 8 6.0
Owen Kaser 1 5.6
Oskar Werkelin Ahlin 19 4.4
Ondřej Lhoták 35 5.3
Olivier Bourgeois 1 2.2
Olav Røthe Bakken 3 4.3
Nils Gustafsson 3 2.8
Nils Grimsmo 4 4.2
Nikola Pintarić 1 1.3
Nikola Dmitrović 5 1.5
Nicholas Sharp 3 2.2
Nguyen Tan Sy Nguyen 1 4.7
Neha Kapur 1 1.4
Nathan Backman 4 4.0
Nalin Bhardwaj 1 6.9
Mykola Protsenko 1 3.4
Moritz Kobitzsch 3 5.0
Modan Han 6 4.2
Mislav Bradač 3 6.1
Mislav Balunović 14 5.4
Mike Zmuda 1 3.7
Mike Domaratzki 2 5.7
Mikael Goldmann 16 5.6
Miguel Oliveira 6 6.1
Miguel Araújo 6 5.8
Michał Sapalski 1 6.4
Michał Pilipczuk 5 4.7
Michal Forišek 6 3.3
Michael Zmuda 1 1.4
Michael Goldwasser 7 5.0
Michael C Slattery 1 5.9
Michael Bradet-Legris 1 5.0
Micah Stairs 5 5.9
Mees de Vries 17 5.0
Max Wilson 1 2.1
Matthias Bayerlein 1 4.2
Matija Milišić 1 6.9
Matias Holte 1 3.3
Mathijs de Weerdt 1 4.0
Martin Macko 1 3.0
Martin Kačer 1 6.9
Mårten Wiman 4 6.5
Markus S. Dregi 4 6.5
Markus Fanebust Dregi 1 4.7
Markus Dregi 2 7.2
Mark Theng Kwang Hui 2 7.8
Marko Ivanković 9 3.5
Marko Berezovsky 4 5.9
Mark Gordon 1 6.8
Marius Andrei 1 5.6
Mario Nakazawa 1 2.1
Marin Tomić 9 5.2
Margarida Mamede 4 4.9
Marc Vinyals 15 6.0
Marcus Isaksson 1 5.7
Marc Furon 1 6.6
Manuel Freire 1 2.5
Manuel Abellanas 1 7.2
Måns Magnusson 7 5.4
Malcolm Sharpe 10 5.9
Mahbubul Hasan 2 6.0
Magnus Øian 2 4.6
Magne Vikjord 3 5.9
Maciej Liskiewicz 1 6.5
Łukasz Matylla 1 8.8
Lukáš Poláček 49 5.5
Luka Kalinovčić 4 5.4
Luis Hernández Corbato 1 7.6
Lucas Wood 1 4.0
Louis Jachiet 1 8.4
Li Cheuk Ting 2 6.6
Liam Keliher 11 4.4
Lewin Gan 2 6.0
Leung Kai Man 1 7.9
Leszek Horwath 1 7.4
Leo Osvald 2 5.1
Lee Chun Yin 1 8.7
Lech Duraj 10 6.5
Law Wai Hon 2 3.5
Lau Lap Chi 1 6.3
Larry Pyeatt 2 3.9
Larry D. Pyeatt 2 6.4
Lap Chi Lau 1 6.7
Kyle See 2 4.5
Kristof Unterweger 1 4.0
Kristoffer Arnsfelt Hansen 1 5.5
Kent Williams-King 4 6.8
Kathleen Ericson 5 3.1
Karl Johan Sande Heimark 9 5.3
Kai Chen 2 3.8
Justin Park 1 2.3
Junbin Teng 1 7.2
Julian Neeleman 1 8.3
Julian Dörfler 1 6.9
Julian Baldus 1 6.9
Jozef Šiška 1 3.2
Josse van Dobben de Bruyn 7 4.5
Joshua T. Guerin 5 3.1
Joshua Moerman 3 6.1
Joseph Swernofsky 2 5.5
José Paulo Leal 1 4.4
Josef Cibulka 1 6.9
Josee Tasse 1 5.6
Joris van Rantwijk 5 5.4
Joran van Apeldoorn 1 3.7
Jon Marius Venstad 10 4.8
Jon Ander Gómez 3 5.2
John Dethridge 4 5.4
John Cigas 4 1.7
John Bonomo 42 4.4
Johan Sannemo 66 5.8
Jimmy Mårdell 17 5.3
Jim Grimmett 10 4.6
Jesper Öqvist 2 7.2
Jeroen de Jong 1 6.5
Jeroen Bransen 7 3.6
Jennifer Shimada 1 4.4
Jennifer Lhoták 1 5.4
Jeff Kinne 1 1.5
Jean Niklas L'orange 14 4.9
Jean-Christophe Filliâtre 1 4.9
Javier Gómez Serrano 3 5.8
Jason Pham 1 3.4
Jan Stoklasa 1 6.9
Jan Kuipers 7 5.6
Jan Elffers 4 5.4
James Stanley 1 2.6
James Feher 5 2.0
Jalal Almhana 1 2.0
Jakub Závodný 1 7.6
Jakub Pachocki 2 7.5
Jakob Krainz 3 6.3
Jacques-Henri Jourdan 1 7.1
Jacob Plachta 3 5.4
Jacob Merizia 1 5.3
Jack Rosenthal 3 1.9
Jaap Eldering 5 5.9
Ivor Page 3 4.2
Ivona Bezakova 4 5.7
Ivan Paljak 7 5.3
Ivan Katanić 5 6.7
Isaac Lee 1 7.6
Irvan Jahja 8 5.4
Ioana Ilena 1 5.9
Igor Naverniouk 1 6.6
Ian Munro 1 2.9
Hung Chun Ho 1 8.9
Hubert Teo Hua Kian 3 6.6
Howard Cheng 23 4.0
Hon Man Hin 3 5.4
Henry Wang 1 3.5
Henrik Eriksson 4 2.9
Hélène Verhaeghe 1 2.7
Harry Smit 6 5.4
Harrison Fang 2 3.2
Haochen Chen 4 5.8
Hans Wennborg 1 5.0
Gustav Matula 1 5.9
Gunnar Kreitz 10 4.6
Gu Jin 2 5.9
Grzegorz Herman 3 7.3
Gregor Behnke 6 4.5
Greg Hamerly 92 4.0
Graeme Zinck 1 4.8
Graeme Kemkes 1 2.9
Gordon V. Cormack 46 4.9
Gordon Cormack 1 6.3
Goran Žužić 9 6.2
Goran Gašić 3 4.9
Godmar Back 31 3.7
Gilbert Lee 1 5.9
Gerben Stavenga 3 5.5
Fredrik Svensson 4 6.7
Fredrik Niemelä 2 5.0
Frane Kurtović 1 4.7
François Aubry 2 3.5
Francisco Criado 1 4.8
Florin Ghesu 1 6.4
Filip Barl 7 3.8
Felix Halim 1 2.1
Etienne Vouga 3 4.6
Erik Aas 3 7.5
Eric Shade 1 6.1
Eric Hervet 1 2.0
Enrique Martín Martín 1 8.9
Emma Enström 3 3.3
Emilio Vivancos 1 5.0
Eirik Reksten 1 7.8
Egor Dranischnikow 3 4.1
Eduard Kalinicenko 1 6.8
Ed Skochinski 1 8.6
Don Reble 3 4.5
Dominik Gleich 17 5.2
Domagoj Ćevid 2 6.5
Domagoj Bradač 1 6.7
Dillon Cutaiar 1 2.7
Derek Kisman 3 6.7
Deon Nicholas 5 5.2
David van Brackle 1 6.5
David Sturgill 74 3.8
David Poplawski 1 5.7
David García Soriano 2 6.3
David Arthur 1 6.6
Dave Hotchkiss 2 1.9
Darko Aleksic 7 4.1
Darcy Best 5 3.9
Daniel Stefankovic 3 7.2
Daniel Robbins 1 7.7
Daniel Paleka 1 8.5
Daniel Moyer 1 2.2
Daniel Lokshtanov 4 6.3
Daniel Gil 1 1.7
Daniel Espling 3 6.3
Daniel Brinkers 2 2.3
Dan Folescu 1 2.1
Damian Straszak 2 6.5
Cosmin Negruseri 4 5.5
Clark Cucinell 1 3.2
Christopher Raphael 1 5.9
Christoph Dürr 2 5.0
Christian Renner 2 4.7
Christian Neverdal Jonassen 2 2.2
Christian Ledig 1 4.5
Christian Jonassen 1 1.4
Christian Hundt 1 7.6
Chin Zhan Xiong 1 5.9
Chidambaram Annamalai 1 7.7
Chengyu Lin 2 7.5
Charles L. A. Clarke 1 3.4
Chan Pak Hei 1 4.7
Chan Pak Hay 1 4.3
Chad Mourning 1 3.0
Bryce Sandlund 3 5.4
Bruno Rahle 6 3.6
Bruce S. Elenbogen 1 3.0
Bruce Elenbogen 1 5.5
Brian Chen 1 3.6
Branimir Filipović 3 3.8
Brandon Fuller 9 4.8
Bo Zhou 1 8.8
Bowen Yu 24 5.8
Børge Nordli 1 5.6
Bob Roos 3 5.8
Bob Pilgrim 2 4.2
Boaz Pat-El 4 4.6
Boas Kluiving 1 6.1
Björn Hegerfors 1 7.7
Bjarki Ágúst Guðmundsson 13 4.6
Birk Tjelmeland 2 3.9
Bergur Snorrason 6 4.8
Ben Zhang 1 5.0
Benjamin Reidys 1 4.8
Ben Bradshaw 1 6.2
Bartosz Walczak 2 5.9
Bartholomew Furrow 3 5.7
Babak Behsaz 6 4.2
Atli Fannar Franklín 6 4.8
Arup Guha 3 5.5
Arthur van Goethem 2 3.6
Arne Alex 3 5.4
Arnav Sastry 5 3.7
Arkadiusz Pawlik 4 7.6
Ariana Herbst 2 5.2
Antti Laaksonen 5 5.6
Antonio Jurić 6 4.9
Anton Grbin 2 6.5
Anthony Han 4 5.3
Ante Derek 1 6.6
Andy Nguyen 2 7.9
Andy Harrington 2 7.2
Andriy Katkov 2 4.3
Andrew Warner 1 5.5
Andrew Stankevich 1 8.0
Andrew Harrington 7 3.9
Andrew Gove 1 4.4
Andrew Ahnn 1 2.5
André Susano Pinto 2 7.0
Andreas Schuh 1 1.6
Andreas Lundblad 3 7.1
Andreas Björklund 20 5.5
Ana Paula Tomás 3 5.3
Amar Topalovic 2 6.0
Alex ten Brink 1 6.7
Alex Li 4 6.1
Alex Brodsky 1 5.6
Alexander Wei 1 5.9
Alexander Scheel 2 3.3
Alexander Rass 4 6.6
Alexander Dietsch 2 3.1
Akshay Goel 1 4.1
Adrian Satja Kurdija 15 4.8
Adrian Kügel 3 5.0
Adam Polak 6 5.4
Abe Wits 4 5.3
Abel Molina 1 4.8
A.Augusto de Sousa 1 5.5
Aarav Singh 2 3.7