Problem Authors

Problem author Problems Average Difficulty
Zvonimir Medić 1 6.0
Ziyi Tang 2 3.8
Zack Butler 4 4.6
Zachary Geier 1 3.8
Zachary Friggstad 22 4.6
Yujie An 1 6.6
Yuen Chak Fai 2 4.9
Ylvis 1 2.0
Yingtao Tian 3 5.8
Xiayuan Suo 1 1.7
Xiaoyuan Suo 2 4.0
Xiaomin Chen 5 5.2
Wing-Kin Sung 1 6.7
William Gan Wei Liang 2 7.2
William Fiset 3 5.5
Wenli Looi 5 3.5
Wenda Qiu 3 4.4
Walter Guttmann 1 6.2
Volodymyr Lyubinets 5 5.7
Vlado Keselj 1 7.2
Vladimir Valyukh 3 6.4
Victor Loh Bo Huai 1 7.5
Vegard Sjonfjell 2 4.2
Vaibhav Tulsyan 1 4.5
Unnar Freyr Erlendsson 1 2.0
University of Dallas 1 5.3
Ulle Endriss 1 4.5
Ulf Lundström 22 4.6
Tung Kam Chuen 10 6.7
Truls Amundsen Bjørklund 1 1.3
Truls A. Björklund 1 2.3
Troy Vasiga 3 4.0
Torstein Strømme 15 4.5
Torbjørn Morland 21 4.8
Tony Cai 12 4.6
Tonko Sabolčec 1 3.8
Tom Verhoeff 1 3.4
Tom Rokicki 1 3.3
Tommy Färnqvist 3 4.4
Tom Fuller 1 2.9
Tomas Rokicki 1 7.8
Tómas Ken Magnússon 3 4.0
Tobias Werth 6 3.9
Timon Knigge 11 5.0
Thore Husfeldt 6 5.4
Thomasz Idziaszek 1 5.0
Thomas Lidbetter 4 6.8
Thomas Beuman 4 7.0
Thijs van Ommen 1 6.9
Tan Jun An 2 3.3
Syx Pek 7 5.8
Swen Gaudl 1 7.4
Svetoslav Tzvetkov 1 7.9
Suhendry Effendy 1 1.5
Stuart Hansen 1 3.8
Stjepan Požgaj 1 4.7
Steven Zeil 11 5.6
Steven Halim 12 4.2
Stein Norheim 7 6.1
Stefan Toman 1 3.6
Stefan Pszczolkowski 1 1.8
Stefan Kraus 1 3.0
Stefan Büttcher 3 5.4
Spencer Pao 1 1.8
Sonny Chan 2 4.4
Simon Lindholm 6 8.3
Simon Klein 1 5.7
Silviu Maniu 2 3.2
Sidney Cadot 1 4.3
Sidhant Bansal 2 3.5
Shiplu Hawlader 1 5.4
Shahriar Manzoor 1 4.7
Shaheed Ebrahim 1 3.1
Shafaet Ashraf 1 9.3
Serikzhan S. Kazi 1 5.0
Serikzhan Kazi 1 4.6
Sérgio Crisóstomo 2 3.4
Sean McCulloch 3 6.6
Scott McGowan 1 4.2
Sander Alewijnse 1 8.6
Samuel Tardieu 1 6.3
Ryan Marshall 5 3.8
Ryan Henning 2 5.1
Rujia Liu 5 5.1
Rudy van Vliet 1 5.9
Roger Henriksson 1 4.4
Robin Lee 19 5.6
Robin Christopher Yu 18 6.7
Robert Pilgrim 1 2.8
Robert McGorman 1 2.0
Robert Hochberg 9 4.9
R. Marshall 2 2.9
Richard Peng 5 5.2
Raymond van Bommel 7 5.0
Raymond Kang Seng Ing 1 4.0
Raphaël Marinier 2 5.7
Ranald Lam Yun Shao 1 5.2
Ragnar Nevries 1 8.3
Ragnar Groot Koerkamp 11 4.9
Prabhakar Ragde 2 4.9
Piotr Zielinski 1 5.8
Piotr Rudnicki 20 4.3
Piotr Micek 1 7.2
Philip Wellnitz 1 6.2
Petter Elvevoll 2 3.6
Petr Mitrichev 1 6.6
Peter Steele 3 7.3
Peter Košinár 1 7.5
Peter Kluit 1 5.1
Peter Høyer 1 4.7
Per Austrin 106 5.6
Peilin Zhong 1 3.8
Pehr Söderman 14 4.7
Pedro Vasconcelos 4 4.8
Pedro Ribeiro 1 4.4
Pedro Guerreiro 3 4.7
Paweł Komosa 1 7.0
Paweł Idziak 1 2.6
Pawel Gawrychowski 2 7.5
Pavel Petrovic 1 6.0
Paul Wild 4 5.3
Pär Söderhjelm 1 6.7
Pål Grønås Drange 6 4.9
Pål G. Drange 4 6.6
Paco Álvaro 1 7.3
Øyvind Haarberg 4 4.3
Øyvind Grotmol 8 6.1
Owen Kaser 1 3.7
Oskar Werkelin Ahlin 19 4.4
Ondřej Lhoták 36 5.4
Olivier Bourgeois 1 2.2
Olav Røthe Bakken 7 5.6
Nils Gustafsson 8 5.6
Nils Grimsmo 4 4.3
Nikola Pintarić 1 1.3
Nikola Dmitrović 5 1.5
Nicholas Sharp 3 2.2
Nguyen Tan Sy Nguyen 1 4.3
Neha Kapur 1 1.5
Nathan Mytelka 1 6.4
Nathan Backman 4 4.0
Nalin Bhardwaj 1 7.4
Mykola Protsenko 1 3.4
Moritz Kobitzsch 3 5.6
Modan Han 6 4.1
Mislav Bradač 3 6.8
Mislav Balunović 14 5.3
Mike Zmuda 1 3.5
Mike Domaratzki 3 5.5
Mikael Goldmann 17 5.5
Miguel Oliveira 6 6.3
Miguel Araújo 6 5.8
Michał Sapalski 1 6.3
Michał Pilipczuk 5 4.7
Michal Forišek 6 3.3
Michael Zmuda 1 1.5
Michael Goldwasser 7 5.0
Michael C Slattery 1 6.7
Michael Bradet-Legris 1 4.4
Micah Stairs 5 5.9
Mees de Vries 17 4.6
Max Wilson 1 2.1
Matthias Bayerlein 1 4.3
Matija Milišić 1 7.0
Matias Holte 1 3.3
Mathijs de Weerdt 1 4.3
Martin Macko 1 3.0
Martin Kačer 1 6.9
Mårten Wiman 4 6.3
Markus S. Dregi 4 6.6
Markus Fanebust Dregi 1 5.6
Markus Dregi 4 6.0
Mark Theng Kwang Hui 2 7.7
Marko Ivanković 9 3.5
Marko Berezovsky 6 5.0
Mark Gordon 1 7.7
Marius Andrei 1 6.4
Mario Nakazawa 1 2.1
Marin Tomić 9 5.2
Margarida Mamede 4 5.0
Marc Vinyals 15 6.0
Marcus Isaksson 1 5.6
Marc Furon 1 6.2
Manuel Freire 1 2.7
Manuel Abellanas 1 7.7
Måns Magnusson 7 5.1
Malcolm Sharpe 11 5.9
Mahbubul Hasan 2 5.8
Magnus Øian 2 5.2
Magne Vikjord 3 6.3
Maciej Liskiewicz 1 6.7
Łukasz Matylla 1 8.7
Lukáš Poláček 49 5.5
Lukas Polacek 1 4.9
Luka Kalinovčić 5 4.5
Luis Hernández Corbato 1 7.0
Lucas Wood 1 4.3
Louis Jachiet 1 8.3
Li Cheuk Ting 2 6.8
Liam Keliher 11 4.3
Lewin Gan 3 6.8
Leung Kai Man 1 8.3
Leszek Horwath 1 6.2
Leo Osvald 2 5.0
Lee Chun Yin 1 8.2
Lech Duraj 10 6.5
Law Wai Hon 2 3.7
Lau Lap Chi 1 5.8
Larry Pyeatt 2 3.7
Larry D. Pyeatt 2 6.8
Lap Chi Lau 1 7.7
Kyle See 2 3.9
Kristof Unterweger 1 4.7
Kristoffer Arnsfelt Hansen 1 5.4
Kent Williams-King 4 6.1
Kathleen Ericson 7 3.0
Karl Johan Sande Heimark 9 4.6
Kai Chen 2 4.1
Justin Park 1 2.5
Junbin Teng 1 7.3
Julian Neeleman 1 8.5
Julian Dörfler 1 6.2
Julian Baldus 1 6.2
Jozef Šiška 1 3.3
Josse van Dobben de Bruyn 7 4.5
Joshua T. Guerin 7 3.0
Joshua Moerman 3 6.2
Joseph Swernofsky 2 5.3
José Paulo Leal 1 3.9
Josef Cibulka 1 6.9
Josee Tasse 1 3.7
Joris van Rantwijk 5 5.6
Joran van Apeldoorn 1 4.9
Jon Marius Venstad 10 4.6
Jon Ander Gómez 3 5.8
John Dethridge 4 5.9
John Cigas 4 1.8
John Bonomo 46 4.6
Johan Sannemo 66 5.7
Jingbo Shang 8 5.6
Jimmy Mårdell 17 5.5
Jim Grimmett 10 4.7
Jesper Öqvist 3 7.5
Jeroen de Jong 1 5.7
Jeroen Bransen 7 3.8
Jennifer Shimada 1 6.0
Jennifer Lhoták 1 6.8
Jeff Kinne 1 1.5
Jean Niklas L'orange 14 5.0
Jean-Christophe Filliâtre 1 4.5
Javier Gómez Serrano 3 5.7
Jason Pham 1 3.3
Jan Stoklasa 1 6.9
Jan Kuipers 7 5.7
Jan Elffers 4 5.2
James Stanley 1 2.7
James Feher 5 1.9
Jalal Almhana 1 2.0
Jakub Závodný 1 7.5
Jakub Pachocki 2 7.3
Jakob Krainz 3 5.7
Jaehyun Park 1 8.5
Jacques-Henri Jourdan 1 7.2
Jacob Plachta 3 5.2
Jacob Merizia 1 5.1
Jack Rosenthal 3 1.8
Jaap Eldering 5 6.1
Ivor Page 3 4.1
Ivona Bezakova 7 6.6
Ivan Paljak 7 4.9
Ivan Katanić 5 6.5
Isaac Lee 1 6.7
Irvan Jahja 8 5.9
Irina Kostitsyna 1 3.7
Ioana Ilena 1 5.3
Igor Naverniouk 1 7.2
Ian Munro 1 2.8
Hung Chun Ho 1 8.7
Hubert Teo Hua Kian 3 6.8
Howard Cheng 25 4.1
Hon Man Hin 3 6.6
Henry Wang 1 3.1
Henrik Eriksson 4 2.9
Hélène Verhaeghe 1 2.4
Harry Smit 6 4.9
Harrison Fang 2 4.3
Haochen Chen 4 5.8
Hans Wennborg 1 5.1
Gustav Matula 1 3.3
Gunnar Kreitz 10 4.8
Gu Jin 2 5.3
Grzegorz Herman 3 6.9
Gregor Behnke 6 4.5
Greg Hamerly 96 4.0
Graeme Zinck 1 4.2
Graeme Kemkes 1 2.8
Gordon V. Cormack 46 5.0
Gordon Cormack 1 6.1
Goran Žužić 9 6.1
Goran Gašić 3 5.3
Godmar Back 32 3.9
Gilbert Lee 1 6.1
Gerben Stavenga 3 5.7
Fredrik Svensson 4 6.3
Fredrik Niemelä 2 5.7
Frane Kurtović 1 6.0
François Aubry 2 4.4
Francisco Criado 1 5.0
Florin Ghesu 1 7.0
Filip Barl 7 4.1
Filiberto Fuentes 1 5.3
Felix Halim 1 2.4
Etienne Vouga 10 5.1
Erik Aas 3 7.5
Eric Shade 1 5.1
Eric Hervet 1 2.0
Enrique Martín Martín 1 8.6
Emma Enström 3 3.2
Emilio Vivancos 1 4.9
Eirik Reksten 1 7.8
Egor Dranischnikow 3 4.3
Eduard Kalinicenko 1 7.5
Ed Skochinski 1 7.9
Don Reble 3 4.2
Dominik Gleich 17 5.6
Domagoj Ćevid 2 6.5
Domagoj Bradač 1 6.5
Dillon Cutaiar 1 2.1
Derek Kisman 3 7.2
Deon Nicholas 5 4.6
David van Brackle 1 6.3
David Sturgill 74 3.9
David Poplawski 1 5.2
David García Soriano 2 5.8
David Arthur 1 6.6
Dave Hotchkiss 2 1.8
Darko Aleksic 7 4.1
Darcy Best 7 3.7
Daniel Stefankovic 5 7.6
Daniel Robbins 1 6.2
Daniel Paleka 1 7.8
Daniel Moyer 1 2.3
Daniel Lokshtanov 4 6.4
Daniel Gil 1 1.8
Daniel Espling 3 5.9
Daniel Brinkers 2 2.3
Dan Folescu 1 1.8
Damian Straszak 2 5.9
Cosmin Negruseri 4 6.1
Clark Cucinell 1 2.8
Christopher Raphael 1 5.8
Christoph Dürr 2 4.7
Christian Renner 2 4.5
Christian Neverdal Jonassen 2 2.2
Christian Ledig 1 4.3
Christian Jonassen 1 1.6
Christian Hundt 1 8.3
Chin Zhan Xiong 1 5.3
Chidambaram Annamalai 1 7.4
Chengyu Lin 2 6.4
Charles L. A. Clarke 1 3.6
Chan Pak Hei 1 6.6
Chan Pak Hay 1 4.1
Chad Mourning 1 3.0
Bryce Sandlund 3 4.7
Bruno Rahle 7 3.7
Bruce S. Elenbogen 1 2.6
Bruce Elenbogen 1 5.4
Brian Chen 1 3.5
Branimir Filipović 3 3.6
Brandon Fuller 13 4.5
Bo Zhou 1 9.1
Bowen Yu 27 5.8
Børge Nordli 1 5.5
Bob Roos 9 5.4
Bob Pilgrim 2 3.9
Boaz Pat-El 4 5.0
Boas Kluiving 1 6.8
Björn Hegerfors 1 7.5
Bjarki Ágúst Guðmundsson 15 4.9
Birk Tjelmeland 2 4.5
Bergur Snorrason 6 4.8
Ben Zhang 1 6.9
Benjamin Reidys 1 4.9
Ben Bradshaw 1 5.5
Bartosz Walczak 2 6.0
Bartholomew Furrow 3 5.9
Babak Behsaz 6 4.3
Atli Fannar Franklín 6 4.8
Arup Guha 3 5.2
Arthur van Goethem 2 3.2
Arne Alex 3 5.7
Arnav Sastry 8 4.3
Arkadiusz Pawlik 4 7.3
Ariana Herbst 2 6.0
Antti Laaksonen 6 5.2
Antonio Jurić 6 4.8
Anton Grbin 2 7.2
Anthony Han 4 5.3
Ante Derek 1 7.2
Andy Nguyen 2 8.6
Andy Harrington 2 7.3
Andriy Katkov 2 4.3
Andrew Warner 1 5.0
Andrew Stankevich 1 7.9
Andrew Nuxoll 1 5.7
Andrew Harrington 7 3.6
Andrew Gove 1 3.5
Andrew Baas 1 5.7
Andrew Ahnn 1 2.6
André Susano Pinto 2 7.3
Andreas Schuh 1 1.7
Andreas Lundblad 3 7.1
Andreas Björklund 20 5.5
Ana Paula Tomás 3 5.0
Amar Topalovic 2 6.9
Alex ten Brink 1 6.4
Alex Li 4 5.4
Alex Brodsky 1 7.1
Alexander Wei 1 6.0
Alexander Scheel 2 3.2
Alexander Rass 4 6.4
Alexander Dietsch 4 4.6
Akshay Goel 1 4.0
Adrian Satja Kurdija 18 4.9
Adrian Kügel 3 5.0
Adam Polak 6 5.3
Abe Wits 4 5.8
Abel Molina 1 4.9
A.Augusto de Sousa 1 5.8
Aaron Deever 1 6.6
Aarav Singh 2 4.6