Problem Authors

Problem author Problems Average Difficulty
Zvonimir Medić 1 6.5
Ziyi Tang 2 3.6
Zack Butler 4 5.3
Zachary Geier 1 4.9
Zachary Friggstad 22 4.4
Yujie An 1 6.4
Yuen Chak Fai 2 4.3
Ylvis 1 2.0
Yingtao Tian 3 5.9
Xiayuan Suo 1 1.7
Xiaoyuan Suo 2 3.9
Xiaomin Chen 5 5.2
Wing-Kin Sung 1 6.8
William Gan Wei Liang 2 7.3
William Fiset 4 3.9
Wenli Looi 5 3.4
Wenda Qiu 3 5.1
Walter Guttmann 1 6.6
Volodymyr Lyubinets 5 5.4
Vlado Keselj 1 7.8
Vladimir Valyukh 3 6.3
Victor Loh Bo Huai 1 7.5
Vegard Sjonfjell 2 4.2
Vaibhav Tulsyan 1 4.1
Unnar Freyr Erlendsson 1 1.9
University of Dallas 1 5.4
Ulle Endriss 1 4.3
Ulf Lundström 22 4.6
Tung Kam Chuen 10 6.3
Truls Amundsen Bjørklund 1 1.3
Truls A. Björklund 1 2.3
Troy Vasiga 3 3.8
Torstein Strømme 15 4.8
Torbjørn Morland 21 4.9
Tony Cai 12 4.5
Tonko Sabolčec 1 3.7
Tom Verhoeff 1 3.0
Tom Rokicki 1 3.2
Tommy Färnqvist 3 4.2
Tom Fuller 1 2.9
Tomas Rokicki 1 5.1
Tómas Ken Magnússon 3 3.8
Tobias Werth 6 3.9
Timon Knigge 11 5.0
Thore Husfeldt 7 5.4
Thomasz Idziaszek 1 4.6
Thomas Lidbetter 6 6.8
Thomas Beuman 4 7.3
Thijs van Ommen 1 7.5
Thierry Lavoie 1 5.4
Tan Jun An 2 3.9
Syx Pek 7 5.8
Synopsys 1 5.4
Swen Gaudl 1 7.3
Svetoslav Tzvetkov 1 8.1
Suhendry Effendy 1 1.4
Stuart Hansen 1 3.8
Stjepan Požgaj 1 4.9
Steven Zeil 11 5.5
Steven Wijaya 1 6.6
Steven Halim 23 4.9
Stein Norheim 7 6.2
Stefan Toman 1 3.6
Stefan Pszczolkowski 1 1.8
Stefan Kraus 1 3.1
Stefan Büttcher 3 5.7
Spencer Pao 1 2.2
Sonny Chan 3 4.8
Simon Lindholm 8 7.8
Simon Klein 1 5.8
Silviu Maniu 2 2.9
Sidney Cadot 1 3.5
Sidhant Bansal 2 3.6
Shiplu Hawlader 1 5.2
Shahriar Manzoor 1 5.9
Shaheed Ebrahim 1 3.1
Shafaet Ashraf 1 9.2
Serikzhan S. Kazi 1 4.7
Serikzhan Kazi 1 5.7
Sérgio Crisóstomo 2 4.3
Sean McCulloch 3 6.4
Scott McGowan 1 4.5
Sander Alewijnse 1 8.8
Samuel Tardieu 1 7.7
Saketh Are 1 5.4
Ryan Marshall 5 3.7
Ryan Henning 2 5.4
Rujia Liu 5 4.9
Rudy van Vliet 1 5.8
Roger Henriksson 1 4.3
Robin Lee 19 5.6
Robin Christopher Yu 44 6.2
Robert Pilgrim 1 2.7
Robert McGorman 1 2.0
Robert Hochberg 9 4.9
R. Marshall 2 2.9
Richard Peng 5 5.0
Raymond van Bommel 7 4.9
Raymond Kang Seng Ing 1 4.0
Raphaël Marinier 2 6.2
Ranald Lam Yun Shao 2 7.2
Ragnar Nevries 1 7.9
Ragnar Groot Koerkamp 11 5.0
Prabhakar Ragde 2 5.4
Piotr Zielinski 1 5.8
Piotr Rudnicki 20 4.3
Piotr Micek 1 6.7
Philip Wellnitz 1 6.3
Petter Elvevoll 2 3.9
Petr Mitrichev 1 6.7
Peter Steele 3 7.7
Peter Košinár 1 7.2
Peter Kluit 1 6.1
Peter Høyer 1 4.6
Per Austrin 110 5.6
Peilin Zhong 2 6.4
Pehr Söderman 14 4.7
Pedro Vasconcelos 4 4.7
Pedro Ribeiro 1 5.7
Pedro Guerreiro 3 5.6
Paweł Komosa 1 7.0
Paweł Idziak 1 2.6
Pawel Gawrychowski 2 8.0
Pavel Petrovic 1 6.0
Paul Wild 4 5.5
Pär Söderhjelm 1 5.6
Pål Grønås Drange 6 4.7
Pål G. Drange 4 6.4
Paco Álvaro 1 7.4
Øyvind Haarberg 4 4.4
Øyvind Grotmol 8 6.4
Owen Kaser 1 4.2
Oskar Werkelin Ahlin 19 4.5
Ondřej Lhoták 37 5.3
Olivier Bourgeois 1 2.1
Olav Røthe Bakken 7 5.9
Nils Gustafsson 21 5.4
Nils Grimsmo 4 4.2
Nikola Pintarić 1 1.4
Nikola Dmitrović 5 1.6
Nicholas Sharp 3 2.1
Nguyen Tan Sy Nguyen 1 4.6
Nguyen Dinh Quang Minh 9 5.8
Neha Kapur 1 1.4
Nathan Mytelka 1 6.3
Nathan Backman 4 3.9
Nalin Bhardwaj 1 7.0
Mykola Protsenko 1 3.3
Moritz Kobitzsch 3 5.6
Modan Han 6 4.1
Mislav Bradač 3 7.1
Mislav Balunović 14 5.5
Mike Zmuda 1 3.4
Mike Domaratzki 3 5.7
Mikael Goldmann 17 5.3
Miguel Oliveira 6 6.2
Miguel Araújo 6 5.9
Michał Sapalski 1 6.4
Michał Pilipczuk 5 4.3
Michal Forišek 6 3.2
Michael Zmuda 1 1.6
Michael Goldwasser 7 4.8
Michael C Slattery 1 6.5
Michael Bradet-Legris 1 2.8
Micah Stairs 6 6.2
Mees de Vries 17 4.5
Max Wilson 1 2.1
Matthias Bayerlein 1 4.6
Matthew Ng Zhen Rui 4 5.6
Matija Milišić 1 7.0
Matias Holte 1 3.1
Mathijs de Weerdt 1 3.5
Martin Tran 5 2.8
Martin Macko 1 3.1
Martin Kačer 1 6.5
Mårten Wiman 4 5.7
Markus S. Dregi 4 6.4
Markus Fanebust Dregi 1 5.3
Markus Dregi 4 5.9
Mark Theng Kwang Hui 2 7.7
Marko Ivanković 9 3.6
Marko Berezovsky 6 4.9
Mark Gordon 1 7.7
Marius Andrei 1 6.5
Mario Nakazawa 1 2.0
Marin Tomić 9 5.3
Margarida Mamede 4 4.6
Marc Vinyals 15 5.9
Marcus Isaksson 1 5.3
Marc Furon 1 6.3
Manuel Freire 1 3.0
Manuel Abellanas 1 7.8
Måns Magnusson 9 4.6
Malcolm Sharpe 11 6.3
Maj Stenmark 2 2.8
Mahbubul Hasan 2 6.3
Magnus Øian 2 5.2
Magne Vikjord 3 6.0
Maciej Liskiewicz 1 6.5
Łukasz Matylla 1 8.0
Lukáš Poláček 49 5.5
Lukas Polacek 1 5.7
Luka Kalinovčić 5 5.4
Luis Hernández Corbato 1 8.3
Lucas Wood 1 3.6
Louis Jachiet 1 7.5
Li Cheuk Ting 2 5.6
Liam Keliher 17 4.3
Lewin Gan 3 5.9
Leung Kai Man 1 8.0
Leszek Horwath 1 7.5
Leo Osvald 2 5.2
Lee Chun Yin 1 8.7
Lech Duraj 10 6.1
Law Wai Hon 2 3.9
Lau Lap Chi 1 6.1
Lars Åström 2 2.2
Larry Pyeatt 2 3.7
Larry D. Pyeatt 2 4.9
Lap Chi Lau 1 6.5
Kyle See 2 4.7
Kuan Wei Heng 1 4.9
Kristof Unterweger 1 4.8
Kristoffer Arnsfelt Hansen 1 6.1
Kent Williams-King 4 6.5
Kathleen Ericson 7 3.0
Karl Johan Sande Heimark 9 4.8
Kai Chen 3 5.2
Justin Park 1 2.6
Junbin Teng 1 7.6
Julian Neeleman 1 8.9
Julian Dörfler 1 6.3
Julian Baldus 1 6.3
Jozef Šiška 1 3.5
Josse van Dobben de Bruyn 7 4.3
Joshua T. Guerin 7 3.0
Joshua Moerman 3 6.6
Joseph Swernofsky 3 4.1
José Paulo Leal 1 3.8
Josef Cibulka 1 6.5
Josee Tasse 1 4.2
Joris van Rantwijk 5 5.3
Joran van Apeldoorn 1 5.2
Jon Marius Venstad 10 4.8
Jon Ander Gómez 3 5.1
John Dethridge 4 5.7
John Cigas 4 1.8
John Bonomo 46 4.7
Johan Sannemo 72 5.6
Jingbo Shang 8 5.2
Jimmy Mårdell 17 5.3
Jim Grimmett 10 4.3
Jesper Öqvist 4 6.0
Jeroen de Jong 1 5.9
Jeroen Bransen 7 3.8
Jennifer Shimada 1 4.7
Jennifer Lhoták 1 6.2
Jeff Kinne 1 1.4
Jean Niklas L'orange 14 4.9
Jean-Christophe Filliâtre 1 4.5
Javier Gómez Serrano 3 5.6
Jason Pham 1 4.1
Jan Stoklasa 1 6.5
Jan Kuipers 8 5.5
Jan Elffers 4 5.6
James Stanley 1 2.8
James Feher 5 1.9
Jalal Almhana 1 2.0
Jakub Závodný 1 7.7
Jakub Pachocki 2 7.6
Jakob Krainz 3 5.2
Jaehyun Park 1 6.3
Jacques-Henri Jourdan 1 6.4
Jacob Plachta 3 4.4
Jacob Merizia 1 4.5
Jack Rosenthal 3 1.9
Jaap Eldering 5 6.0
Ivor Page 3 4.2
Ivona Bezakova 7 6.6
Ivan Paljak 7 4.9
Ivan Katanić 5 6.6
Isaac Lee 2 6.4
Isaac Arvestad 4 4.1
Irvan Jahja 8 5.8
Irina Kostitsyna 1 4.0
Ioana Ilena 1 5.3
Igor Naverniouk 1 6.5
Ian Munro 1 2.9
Hung Chun Ho 1 8.5
Hubert Teo Hua Kian 3 7.0
Howard Cheng 25 3.9
Hon Man Hin 3 6.1
Henry Wang 1 2.7
Henrik Eriksson 4 3.1
Hélène Verhaeghe 1 2.4
Harry Smit 6 5.2
Harrison Fang 2 4.4
Haochen Chen 4 6.0
Hans Wennborg 1 5.3
Gustav Matula 1 3.2
Gunnar Kreitz 11 4.9
Gu Jin 3 6.7
Grzegorz Herman 3 7.7
Gregor Behnke 6 4.8
Greg Hamerly 96 3.9
Graeme Zinck 2 4.6
Graeme Kemkes 1 2.9
Gordon V. Cormack 46 4.9
Gordon Cormack 1 7.8
Goran Žužić 9 6.2
Goran Gašić 3 6.0
Godmar Back 32 3.8
Gilbert Lee 1 5.6
Gerben Stavenga 3 5.5
Fredrik Svensson 4 6.2
Fredrik Niemelä 2 5.0
Frane Kurtović 1 6.4
François Aubry 2 4.9
Francisco Criado 1 4.7
Florin Ghesu 1 8.3
Filip Barl 7 4.1
Filiberto Fuentes 1 6.0
Felix Halim 1 2.3
Etienne Vouga 10 4.6
Erik Amirell Eklöf 1 8.6
Erik Aas 3 7.5
Eric Shade 1 4.0
Eric Hervet 1 2.0
Enrique Martín Martín 1 8.1
Emma Enström 3 2.9
Emilio Vivancos 1 4.5
Eirik Reksten 1 7.8
Egor Dranischnikow 3 4.3
Eduard Kalinicenko 1 7.6
Ed Skochinski 1 8.1
Don Reble 3 4.1
Dominik Gleich 17 5.6
Domagoj Ćevid 2 7.2
Domagoj Bradač 1 6.1
Dillon Cutaiar 1 2.0
Derek Kisman 3 7.4
Deon Nicholas 5 4.6
David van Brackle 1 6.5
David Sturgill 74 3.9
David Poplawski 1 5.5
David García Soriano 2 5.9
David Arthur 1 7.3
Dave Hotchkiss 2 1.9
Darko Aleksic 7 4.0
Darcy Best 7 3.8
Dante Bencivenga 2 5.4
Daniel Stefankovic 5 7.7
Daniel Robbins 1 6.0
Daniel Paleka 1 7.6
Daniel Moyer 1 2.4
Daniel Lokshtanov 4 6.7
Daniel Gil 1 1.8
Daniel Espling 3 5.7
Daniel Brinkers 2 2.4
Dan Folescu 1 1.7
Damian Straszak 2 6.0
Cosmin Negruseri 4 6.0
Clark Cucinell 1 2.7
Christopher Raphael 1 5.8
Christoph Dürr 2 5.0
Christian Renner 2 4.6
Christian Neverdal Jonassen 2 2.1
Christian Ledig 1 4.3
Christian Jonassen 1 1.5
Christian Hundt 1 7.9
Chin Zhan Xiong 1 5.8
Chidambaram Annamalai 1 7.3
Chengyu Lin 3 6.6
Charles L. A. Clarke 1 3.8
Chan Pak Hei 1 6.9
Chan Pak Hay 1 4.2
Chad Mourning 1 2.9
Bryce Sandlund 3 4.3
Bruno Rahle 7 3.7
Bruce S. Elenbogen 1 2.4
Bruce Elenbogen 1 5.1
Brian Chen 1 2.9
Branimir Filipović 3 3.5
Brandon Fuller 13 4.3
Bo Zhou 2 9.0
Bowen Yu 32 6.0
Børge Nordli 1 7.2
Bob Roos 9 5.0
Bob Pilgrim 2 3.8
Boaz Pat-El 4 4.5
Boas Kluiving 1 6.6
Björn Hegerfors 1 7.4
Bjarki Ágúst Guðmundsson 15 4.7
Birk Tjelmeland 2 4.6
Bergur Snorrason 6 4.8
Ben Zhang 1 6.6
Benjamin Reidys 1 4.9
Ben Bradshaw 1 4.8
Bartosz Walczak 2 5.7
Bartholomew Furrow 3 6.3
Babak Behsaz 6 4.4
Atli Fannar Franklín 6 4.8
Arup Guha 3 5.2
Arthur van Goethem 2 3.9
Arne Alex 3 5.8
Arnav Sastry 8 4.0
Arkadiusz Pawlik 4 7.5
Ariana Herbst 2 5.4
Antti Laaksonen 6 5.2
Antonio Jurić 6 4.8
Anton Grbin 2 7.4
Anthony Han 4 5.6
Ante Derek 1 6.5
Andy Nguyen 2 8.5
Andy Harrington 2 6.8
Andriy Katkov 2 4.1
Andrew Warner 1 6.2
Andrew Stankevich 1 7.9
Andrew Nuxoll 1 5.2
Andrew Harrington 7 3.5
Andrew Gove 1 3.7
Andrew Baas 1 4.7
Andrew Ahnn 1 2.4
André Susano Pinto 2 8.1
Andreas Schuh 1 1.7
Andreas Lundblad 3 7.3
Andreas Björklund 21 5.4
Ana Paula Tomás 3 4.5
Amar Topalovic 2 7.2
Alex ten Brink 1 5.3
Alex Li 4 6.2
Alex Brodsky 1 6.8
Alexander Wei 1 6.0
Alexander Scheel 2 3.3
Alexander Rass 4 6.3
Alexander Dietsch 4 4.9
Akshay Goel 1 4.1
Adrian Satja Kurdija 18 4.6
Adrian Kügel 3 4.8
Adam Polak 6 5.7
Abe Wits 4 5.9
Abel Molina 1 4.5
A.Augusto de Sousa 1 6.9
Aaron Deever 1 5.4
Aarav Singh 2 4.4