Problem Authors

Problem author Problems Average Difficulty
Zvonimir Medić 1 6.7
Ziyi Tang 2 3.7
Zhang Guangxuan 3 6.6
Zack Butler 7 4.6
Zachary Geier 1 6.6
Zachary Friggstad 45 4.7
Yujie An 2 7.8
Yuen Chak Fai 2 5.2
Ylvis 1 2.3
Yingtao Tian 3 5.8
Yen Truong 1 8.3
Xiayuan Suo 1 1.6
Xiaoyuan Suo 2 3.5
Xiaomin Chen 5 5.2
Wing-Kin Sung 1 7.0
William Gan Wei Liang 2 7.3
William Fiset 4 3.9
Wenli Looi 9 4.5
Wenda Qiu 3 5.3
Walter Kong 1 7.5
Walter Guttmann 1 6.5
Vuong Hoang Long 2 5.7
Volodymyr Lyubinets 6 6.0
Vlado Keselj 1 7.7
Vladimir Valyukh 3 7.2
Vinh Pham 1 4.3
Victor Song 1 3.5
Victor Loh Bo Huai 1 7.4
Vegard Sjonfjell 2 3.9
Vamsi Manne 1 2.3
Vaibhav Tulsyan 1 4.6
Unnar Freyr Erlendsson 2 2.2
University of Dallas 1 5.1
Ulle Endriss 1 5.2
Ulf Lundström 23 4.7
Tung Kam Chuen 10 6.6
Truls Amundsen Bjørklund 1 1.3
Truls A. Björklund 1 2.4
Troy Vasiga 3 4.1
Troels Bjerre Lund 1 7.9
Travis Meade 1 7.9
Torstein Strømme 16 4.7
Torbjørn Morland 21 4.8
Tony Cai 12 4.5
Tonko Sabolčec 1 3.4
Tom Verhoeff 1 2.7
Tom Rokicki 1 3.0
Tommy Färnqvist 3 4.3
Tom Fuller 1 2.2
Tomas Rokicki 3 5.6
Tómas Ken Magnússon 4 4.6
Tobias Werth 6 4.3
Timon Knigge 19 5.1
Thore Husfeldt 16 4.8
Thomasz Idziaszek 1 4.9
Thomas Lidbetter 7 7.1
Thomas Beuman 4 7.4
Thijs van Ommen 1 7.1
Thierry Lavoie 3 5.5
Tan Jun An 2 3.1
Tähvend Uustalu 1 6.3
Syx Pek 7 5.8
Synopsys 3 5.5
Swen Gaudl 1 6.8
Svetoslav Tzvetkov 1 7.9
Suhendry Effendy 1 1.5
Stuart Hansen 1 3.8
Stjepan Požgaj 1 5.3
Stjepan Glavina 2 5.4
Steven Zeil 11 5.4
Steven Wijaya 2 7.1
Steven Halim 24 4.9
Stein Norheim 7 6.1
Stefan Toman 1 2.8
Stefan Pszczolkowski 1 1.7
Stefan Kraus 1 3.5
Stefan Büttcher 3 5.1
Spencer Pao 1 2.1
Sonny Chan 6 4.7
Sondre Sortland 2 6.9
Simon Lindholm 20 7.3
Simon Klein 1 5.7
Silviu Maniu 2 3.3
Sigurður Jens Albertsson 1 1.4
Sidney Cadot 1 3.3
Sidhant Bansal 2 3.5
Shiplu Hawlader 1 4.8
Shantanu Modak 3 3.7
Shahriar Manzoor 1 6.5
Shaheed Ebrahim 1 2.9
Shafaet Ashraf 1 9.3
Serikzhan S. Kazi 1 3.2
Serikzhan Kazi 1 5.8
Sérgio Crisóstomo 2 3.0
Sean McCulloch 3 7.4
Scott McGowan 1 3.8
Sander Land 1 7.3
Sander Alewijnse 1 9.4
Samuel Tardieu 1 6.7
Samuel Furman 3 3.4
Saketh Are 1 5.6
Ryan Marshall 5 3.5
Ryan Henning 2 5.5
Ryan Farrell 2 4.3
Rujia Liu 5 4.7
Rudy van Vliet 1 5.8
Rongqi Qiu 2 7.4
Roger Henriksson 1 4.3
Robin Lee 20 5.4
Robin Christopher Yu 49 7.1
Robert Pilgrim 1 2.4
Robert McGorman 1 2.0
Robert Hochberg 10 4.9
R. Marshall 2 2.8
Richard Peng 5 5.2
Reinier Schmiermann 3 5.2
Raymond van Bommel 10 4.9
Raymond Kang Seng Ing 1 6.6
Rasmus Pagh 1 6.6
Raphaël Marinier 2 6.3
Ranald Lam Yun Shao 2 7.2
Ragnar Nevries 1 8.0
Ragnar Groot Koerkamp 19 5.3
Rachel Krohn 1 7.5
Prabhakar Ragde 2 4.9
Piotr Zielinski 1 7.1
Piotr Rudnicki 20 4.4
Piotr Micek 1 7.4
Philip Wellnitz 1 5.8
Petter Elvevoll 2 4.1
Petr Mitrichev 1 6.4
Peter Steele 3 7.4
Peter Košinár 1 4.9
Peter Kluit 1 8.6
Peter Høyer 1 4.7
Per Austrin 114 5.6
Peilin Zhong 2 7.4
Pehr Söderman 18 4.4
Pedro Vasconcelos 4 5.0
Pedro Ribeiro 1 6.8
Pedro Guerreiro 3 4.9
Paweł Komosa 1 7.3
Paweł Idziak 1 2.4
Pawel Gawrychowski 2 7.9
Pavel Petrovic 1 5.1
Paul Wild 9 5.0
Pär Söderhjelm 1 6.1
Pål Grønås Drange 8 4.1
Pål G. Drange 4 6.5
Paco Álvaro 1 7.5
Øyvind Haarberg 4 4.7
Øyvind Grotmol 8 6.9
Owen Kaser 2 5.2
Oskar Werkelin Ahlin 19 4.5
Oskar Haarklou Veileborg 3 4.4
Onno Berrevoets 3 2.7
Ondřej Lhoták 43 5.1
Ómar Högni Guðmarsson 1 1.6
Olivier Bourgeois 1 2.0
Olav Røthe Bakken 7 5.0
Óðinn Eyjólfsson 1 6.0
Noah Weninger 12 5.0
Nils Gustafsson 39 5.6
Nils Grimsmo 5 4.4
Nils Barlaug 2 6.9
Nikola Pintarić 1 1.3
Nikola Dmitrović 5 1.5
Nicole Hedblom 1 4.9
Nicolas Hardy 3 3.4
Nick Wu 9 4.5
Nicholas Sharp 3 2.1
Nguyen Tan Sy Nguyen 1 5.1
Nguyen Dinh Quang Minh 9 7.7
Neha Kapur 1 1.5
Nathan Mytelka 1 6.8
Nathan Backman 4 3.8
Nalin Bhardwaj 2 6.5
Mykola Protsenko 1 3.3
Muhammad Ayaz Dzulfikar 1 2.9
Moritz Kobitzsch 3 5.2
Mohammadreza Mohseni 1 8.0
Modan Han 6 4.4
Mislav Bradač 3 6.9
Mislav Balunović 14 5.6
Ming-Yee Iu 1 5.6
Mike Zmuda 1 3.3
Mike Domaratzki 3 5.8
Mikael Goldmann 17 5.5
Miguel Oliveira 6 6.6
Miguel Araújo 6 5.2
Michał Sapalski 1 7.2
Michał Pilipczuk 5 4.5
Michal Forišek 6 3.0
Michael Zündorf 1 8.1
Michael Zmuda 1 1.6
Michael Goldwasser 7 4.8
Michael C Slattery 1 7.3
Michael Bradet-Legris 1 2.4
Micah Stairs 6 6.5
Mees de Vries 27 4.6
Max Wilson 1 2.1
Mattias Akke 5 5.2
Matthias Bayerlein 1 3.9
Matthew Ng Zhen Rui 6 3.9
Matt Fontaine 2 6.1
Matt Davison 3 2.6
Mats Petter Wallander 1 9.5
Mats Petter Pettersson 1 1.3
Matija Milišić 1 7.9
Matias Holte 1 2.7
Mathijs de Weerdt 1 3.3
Martin Tran 6 2.6
Mārtiņš Opmanis 1 9.4
Martin Macko 1 3.4
Martin Kačer 1 6.7
Mårten Wiman 5 6.8
Markus S. Dregi 4 6.5
Markus Fanebust Dregi 1 5.1
Markus Dregi 4 6.5
Mark Theng Kwang Hui 2 7.8
Marko Ivanković 10 4.0
Marko Berezovsky 7 5.2
Mark Gordon 1 7.4
Mark Braganza 1 5.3
Marius Andrei 1 6.5
Mario Nakazawa 1 2.0
Marin Tomić 9 5.1
Margarida Mamede 4 5.0
Marc Vinyals 15 6.2
Marcus Isaksson 1 5.7
Marc Phua Hsiao Meng 5 6.0
Marc Furon 3 5.8
Manuel Freire 1 2.9
Manuel Abellanas 1 8.2
Måns Magnusson 10 4.4
Malcolm Sharpe 11 6.3
Maj Stenmark 3 2.7
Mahbubul Hasan 2 6.8
Magnus Øian 2 5.5
Magne Vikjord 3 6.0
Maciej Liskiewicz 1 6.9
Luke Son 1 6.2
Łukasz Matylla 1 8.0
Lukáš Poláček 50 5.6
Luka Kalinovčić 5 5.7
Luis Hernández Corbato 1 8.8
Lucas Wood 1 3.8
Louis Jachiet 1 8.0
Loke Gustafsson 1 5.9
Li Cheuk Ting 2 6.9
Liam Keliher 23 4.4
Lewin Gan 12 6.7
Leung Kai Man 1 8.5
Leszek Horwath 1 7.4
Leo Osvald 2 6.4
Lee Chun Yin 1 8.4
Lech Duraj 10 6.1
Law Wai Hon 2 3.8
Lau Lap Chi 1 6.6
Lars Åström 3 3.7
Larry Pyeatt 2 3.7
Larry D. Pyeatt 2 6.6
Lap Chi Lau 1 6.4
Lalitha Kuppa 3 3.4
Kyle See 2 6.8
Kwee Lung Sin 3 8.0
Kuan Wei Heng 1 3.0
Kristof Unterweger 1 5.7
Kristoffer Arnsfelt Hansen 1 5.9
Kent Williams-King 4 6.7
Kathleen Ericson 9 3.1
Karl Lundstig 1 1.6
Karl Johan Sande Heimark 9 5.3
Kai Chen 3 4.6
Justin Park 1 2.9
Justas Klimavičius 1 3.9
Junbin Teng 1 7.3
Julian Neeleman 1 7.3
Julian Dörfler 1 5.8
Julian Baldus 1 5.8
Julia Mårtensson 2 4.1
Jozef Šiška 1 2.9
Josse van Dobben de Bruyn 7 4.2
Joshua T. Guerin 9 3.1
Joshua Moerman 3 6.3
Joseph Swernofsky 3 4.2
José Paulo Leal 1 4.0
Josef Cibulka 1 6.7
Josee Tasse 1 5.2
Jorke de Vlas 5 5.1
Joris van Rantwijk 5 5.5
Joran van Apeldoorn 1 5.0
Jon Marius Venstad 10 5.2
Jonathan Chong 4 4.1
Jon Ander Gómez 3 5.3
John Keyser 2 6.7
John Dethridge 4 5.8
John Cigas 4 1.8
John Bonomo 48 4.8
Johan Sannemo 110 5.1
Jingbo Shang 8 5.7
Jimmy Mårdell 20 5.8
Jim Grimmett 10 5.0
Jiju Poovvancheri 1 2.7
Jesper Öqvist 4 5.8
Jeroen de Jong 1 6.8
Jeroen Bransen 8 3.8
Jennifer Shimada 1 6.3
Jennifer Lhoták 1 6.8
Jeffrey Peng 1 5.4
Jeff Kinne 1 1.5
Jean Niklas L'orange 22 5.1
Jean-Christophe Filliâtre 1 4.5
Javier Gómez Serrano 3 5.7
Jason Pham 1 4.3
Jan Stoklasa 1 6.7
Jan Kuipers 8 6.0
Jan Elffers 4 5.5
James Stanley 1 2.7
James R (Bob) Bradley 1 2.0
James Hughes 1 6.3
James Feher 5 1.9
Jalal Almhana 1 2.0
Jakub Závodný 1 8.1
Jakub Pachocki 2 7.7
Jakob Krainz 3 4.8
Jaehyun Park 1 6.7
Jacques-Henri Jourdan 1 5.3
Jacob Plachta 3 4.6
Jacob Merizia 1 4.4
Jack Rosenthal 3 1.9
Jaap Eldering 5 6.2
Ivor Page 3 4.3
Ivona Bezakova 7 6.3
Ivan Paljak 7 5.5
Ivan Katanić 6 6.3
Isaac Lee 2 6.6
Isaac Arvestad 4 4.2
Irvan Jahja 8 5.8
Irina Kostitsyna 1 4.9
Ioana Ilena 1 5.6
Igor Naverniouk 1 5.9
Ian Munro 1 2.9
Hung Chun Ho 1 8.6
Hugo Eberhard 1 6.8
Hubert Teo Hua Kian 3 7.2
Howard Whitston 1 1.6
Howard Cheng 36 3.9
Hon Man Hin 3 6.2
Henry Xia 4 6.4
Henry Wang 2 4.9
Henrik Eriksson 4 3.3
Hélène Verhaeghe 1 2.6
Harry Smit 9 5.7
Harrison Fang 2 3.4
Haochen Chen 4 5.9
Hans Wennborg 1 5.6
Håkan Strömberg 1 2.5
Gustav Matula 1 4.2
Gustav Kalander 2 9.0
Gunnar Kreitz 11 5.0
Gu Jin 3 6.9
Grzegorz Herman 3 7.9
Gregor Behnke 6 4.8
Greg Hamerly 99 3.8
Graeme Zinck 2 4.5
Graeme Kemkes 1 2.9
Gordon V. Cormack 46 4.9
Gordon Cormack 1 7.8
Goran Žužić 9 6.5
Goran Gašić 3 5.7
Godmar Back 42 4.0
Gilbert Lee 1 5.5
Gerben Stavenga 3 6.1
Gabriela Velazquez-Pergola 1 4.3
Freyr Bergsteinsson 1 7.7
Fredrik Svensson 4 6.6
Fredrik Niemelä 2 4.7
Fredrik Hernqvist 2 5.0
Frane Kurtović 1 5.2
François Aubry 2 4.5
Francisco Criado 1 4.9
Florin Ghesu 1 7.4
Filip Barl 7 4.1
Filiberto Fuentes 1 7.4
Felix Halim 1 2.5
Eyleifur Ingþór Bjarkason 1 4.6
Evan Quach 1 3.7
Etienne Vouga 13 5.7
Erling Alf Ellingsen 1 6.4
Erik Amirell Eklöf 5 6.7
Erik Aas 3 7.0
Eric Shade 1 4.9
Eric Hervet 1 2.0
Enrique Martín Martín 1 8.0
Emma Enström 3 2.6
Emilio Vivancos 1 5.3
Eirik Reksten 1 7.3
Egor Dranischnikow 3 4.4
Edvard Kristoffer Neset Karlsen 1 5.8
Eduard Kalinicenko 1 8.1
Ed Skochinski 3 6.3
Edbert Geraldy Cangdinata 1 5.9
ECNA Judging Team 13 5.4
Don Reble 3 4.9
Dominik Gleich 17 5.3
Domagoj Ćevid 2 7.0
Domagoj Bradač 1 5.0
Dillon Cutaiar 1 2.1
Derek Kisman 3 7.3
Deon Nicholas 5 4.9
David Zheng 5 5.1
David Venhoek 2 4.5
David Van Brackle 4 6.2
David van Brackle 1 7.3
David Sturgill 74 3.8
David Poplawski 1 5.4
David García Soriano 2 6.4
David Arthur 1 7.6
Dave Hotchkiss 2 2.0
Darko Aleksic 7 4.2
Darcy Best 7 4.0
Dante Bencivenga 12 4.8
Daniel Stefankovic 5 7.7
Daniel Robbins 1 7.4
Daniel Paleka 1 8.2
Daniel Moyer 1 2.1
Daniel Lokshtanov 4 6.6
Daniel Gil 1 1.9
Daniel Espling 3 5.8
Daniel Brinkers 2 2.3
Dan Folescu 1 1.8
Dan Alden Baterisna 2 7.0
Damian Straszak 2 5.6
Daan van Gent 2 6.5
Cosmin Negruseri 4 6.4
Colin Peppler 1 2.4
Clark Cucinell 1 2.4
Christopher Raphael 1 5.9
Christoph Dürr 2 5.1
Christian Renner 2 4.5
Christian Neverdal Jonassen 2 2.1
Christian Ledig 1 4.6
Christian Jonassen 1 1.5
Christian Hundt 1 8.0
Chin Zhan Xiong 1 7.8
Chidambaram Annamalai 1 7.9
Chengyu Lin 3 6.3
Charles L. A. Clarke 1 3.8
Chan Pak Hei 1 7.0
Chan Pak Hay 1 4.1
Chad Mourning 1 2.8
Calvin Li 1 2.0
Calvin Godfrey 1 6.7
Bryce Sandlund 6 6.0
Bruno Rahle 7 3.4
Bruno Ploumhans 1 5.4
Bruce S. Elenbogen 1 2.7
Bruce Elenbogen 1 5.4
Brook Tamir 1 6.0
Brian Chen 1 2.5
Brent Yorgey 1 5.7
Branimir Filipović 3 3.5
Brandon Fuller 15 4.2
Bo Zhou 2 9.0
Bowen Yu 44 6.1
Børge Nordli 2 4.9
Bob Roos 20 5.1
Bob Pilgrim 2 3.9
Bob Logan 3 4.3
Boaz Pat-El 4 5.3
Boas Kluiving 2 6.2
Björn Martinsson 7 6.5
Björn Magnusson 1 9.2
Björn Hegerfors 1 7.9
Bjarki Ágúst Guðmundsson 21 5.0
Birk Tjelmeland 2 4.9
Bergur Snorrason 16 4.5
Ben Zhang 1 7.1
Benjamin Reidys 3 3.6
Benjamin Reed 1 2.5
Ben Bradshaw 1 6.8
Bartosz Walczak 2 6.3
Bartholomew Furrow 3 6.1
BAPC jury 2019 1 5.7
Babak Behsaz 6 4.2
Atli Fannar Franklín 6 4.3
Asger Hautop Drewsen 2 5.7
Arup Guha 4 5.3
Arthur van Goethem 2 3.8
Aron Granberg 1 1.9
Arne Alex 3 5.5
Arnav Sastry 11 4.6
Arnar Bjarni Arnarson 3 3.3
Arkadiusz Pawlik 4 7.9
Ariana Herbst 2 6.8
Arash Behpour 1 3.7
Antti Laaksonen 10 5.4
Antonio Jurić 6 4.7
Anton Grbin 2 7.2
Anthony Han 4 4.7
Ante Derek 1 5.9
Andy Nguyen 3 6.9
Andy Harrington 2 6.5
Andriy Katkov 2 3.6
Andrew Warner 1 6.4
Andrew Stankevich 1 8.0
Andrew Nuxoll 1 4.6
Andrew Harrington 7 3.8
Andrew Gove 1 3.7
Andrew Baas 1 6.8
Andrew Ahnn 2 2.7
André Susano Pinto 2 7.6
Andreas Schuh 1 1.8
Andreas Lundblad 3 7.2
Andreas Björklund 22 5.8
Ana Paula Tomás 3 4.7
Amar Topalovic 2 7.4
Aloysius Lim Dewen 2 6.3
Alex ten Brink 1 6.0
Alex Lind 2 2.9
Alex Li 4 5.9
Alex Brodsky 2 4.8
Alexander Wei 1 5.9
Alexander Scheel 2 3.4
Alexander Rass 4 6.4
Alexander Dietsch 5 5.7
Akshay Goel 1 3.9
Adrian Satja Kurdija 18 5.0
Adrian Kügel 3 4.8
Adam Polak 6 5.6
Abod Abbas 2 2.0
Abe Wits 5 5.6
Abel Molina 1 4.2
Abdullah Zaghmout 1 7.5
A.Augusto de Sousa 1 5.4
Aaron Lengyel 5 3.0
Aaron Deever 2 6.1
Aarav Singh 2 4.4