APL Problem Solving Competition
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The APL Problem Solving Competition was a yearly contest hosted by Dyalog Ltd. During the Dyalog user meeting that followed shortly after the competition closed, the winners were announced, followed by presentations by the grand prize winner and the professional prize winner. In 2024, the competition was replaced by the new APL Challenge and the new APL Forge.
The APL Quest is a series of chat events and follow-up videos addressing the Phase 1 problems of past years.
2009
Announcement and about the grand prize winner
| Grand Prize | Ronald Chan | Auckland, New Zealand |
| 2nd Place | Chris King | Brown University, Rhode Island USA |
| 3rd Place | Maks Verver | The Netherlands |
2010
| Grand Prize | Ryan Tarpine | Brown University, Providence, Rhode Island, USA. |
| 2nd Place | Mstislav Elagin | Humboldt-Universität zu Berlin, Germany |
| 3rd Place | Joel Hough | Salt Lake Community College, Kaysville Utah, USA |
| Special Effort | Alexander Ivanov | Moscow Institute for Physical Research |
2011
| Grand Prize | Joel Hough | The University of Utah, USA |
| 2nd Place | Yanqing Chen | Stony Brook University, New York, USA |
| 3rd Place | Elliot Way | Binghamton University, New York, USA |
2012
Announcement and about the winner
| Grand Prize | Hayato Hashimoto | Kyoto University, Japan |
2013
Announcement and about the winners
| Grand Prize | Yanqing Chen | Stony Brook University, USA |
| 2nd Place | Maks Verver | The Netherlands |
| 3rd Place | Chao Xu | University of Illinois, Urbana-Champaign, USA |
2014
About the winners This was the first year in which a prize was offered to non-student entrants.
| Grand Prize | Emil Bremer Orloff | Aarhus University, Denmark |
| 2nd Place | Seán Kelleher | University College Cork, Ireland |
| 3rd Place | Chao Xu | University of Illinois, Urbana-Champaign, U.S.A |
| Professional Prize | Iryna Pashenkovska | SimCorp Ukraine |
| Honourable mention | Jan-Pieter Jacobs | Universiteit Antwerpen, Belgium |
| Christopher Zhang | State University of New York at Binghamton, U.S.A. |
2015
| Grand Prize | Arianna Locatelli | Liceo Classico S. M. Legnani, Saronno, Italy |
| 2nd Place | Joshua (Josh) David | University of Scranton, USA |
| 3rd Place | Dragana Babić | University of Novi Sad, Serbia |
| Professional Prize | Roberto Szabó | |
| Honourable mention | Alexander Kuhnle | Cambridge University, U.K. |
| Luyang Du | State University of New York at Binghamton, U.S.A. |
2016
This round of the competition offered 3 grand prizes, one each in the subject domains of finance, general computing and bioinformatics.
| Grand Prize (Finance) | Janos (Zack) Batik | University of Cape Town, South Africa |
| Grand Prize (General Computing) | Joshua (Josh) David | University of Scranton, USA |
| Grand Prize (Bioinformatics) | Marinus Oosters | Universiteit Utrecht, The Netherlands |
| Professional Prize | Mike Powell | |
| Runner-up (Finance) | Rafael Rodrigues | Fundação Getulio Vargas, Brazil |
| Runner-up (General Computing) | Imaculate Mosha | University of Cape Town, South Africa |
| Runner-up (Bioinformatics) | Louis de Forcrand | Ecole Moser, Switzerland |
2017
| Grand Prize | Kostas Blekos | Panepistimion Patron, Greece |
| 2nd Place | Douglas Patz | Agile Learning Center, New York City, USA |
| 3rd Place | Zachary Taylor | Maryville High School, USA |
| Professional Prize | Mike Powell | |
| Phase I | Armando Cruz | Universidad Nacional Autónoma de México, Mexico |
| Ivan Demianchuk | National Taras Shevchenko University of Kyiv, Ukraine | |
| Yash Garg | Indian Institute of Technology, Delhi, India | |
| Arna Ghosh | Indian Institute of Technology, Kharagpur, India | |
| Akarsh Ramesh Khatagalli | Visvesvaraya Technological University, India | |
| Phase I | Aiken Cairncross | University of Oxford, UK |
| Yu-Chi Chiang | National Central University, Taiwan | |
| Anthony Cipriano | Gustav-Stresemann Gymnasium, Germany | |
| Ivan Demianchuk | National Taras Shevchenko University of Kyiv, Ukraine | |
| Tripti Garg | NorthCap University, India | |
| Arna Ghosh | Indian Institute of Technology, Kharagpur, India | |
| Bertil Johnson | University of Kentucky, USA | |
| Mohammed Malik | Copenhagen International School, Denmark | |
| Douglas Patz | Agile Learning Center, New York, USA | |
| Zachary Taylor | Maryville High School, USA |
2018
| Grand Prize | Alve Björk | Uppsala University, Sweden |
| 2nd Place | Lynn Van Hauwe | University of Antwerp, Belgium |
| 3rd Place | Rafael Rodrigues Rocha de Melo | Kyoto University, Japan |
| Professional Prize | Tiziano Berghi | SimCorp Italiana |
| Phase II | Dinesh Poudel | Jaya Multiple Campus, Nepal |
| Douglas Patz | Agile Learning Center, New York, U.S.A. | |
| Joe Robertson | St. Peter's High School, Gloucester, U.K. | |
| K C Unesh | Kathmand University, Nepal | |
| P R Vaidyanathan | Indian Institute of Technology Gandhinagar, India | |
| Phase I | Alejandra González | Universidad Technológica Nacional – Instituto Nacional Superior del Profesorado Técnico, Argentina |
| Dimitri Lozeve | University of Oxford, U.K. | |
| Dinesh Poudel | Jaya Multiple Campus, Nepal | |
| Douglas Patz | Agile Learning Center, New York, U.S.A. | |
| Du Xi | Australian National University, Australia | |
| Lynn Van Hauwe | University of Antwerp, Belgium | |
| Mohammed Malik | Turku International School, Finland | |
| P R Vaidyanathan | Indian Institute of Technology Gandhinagar, India | |
| Rafael Rodrigues Rocha de Melo | Kyoto University, Japan | |
| K C Unesh | Kathmand University, Nepal |
Published solutions
- rak1507: Phase 1
2019
| Grand Prize | Jamin Wu | Monash University, Australia |
| 2nd Place | Rasmus Précenth | Uppsala University, Sweden |
| 3rd Place | Douglas Patz | Agile Learning Center, New York City, USA |
| Professional Prize | Torsten Grust | University of Tübingen, Germany |
| Phase II | Fredrik Mattisson | Uppsala University, Sweden |
| Joe Robertson | Durham University, U.K. | |
| Louis de Forcrand | Geneva University, Switzerland | |
| P R Vaidyanathan | Indian Institute of Technology Gandhinagar, India | |
| Rafael Rodrigues Rocha de Melo | Kyoto University, Japan | |
| Phase I | David Cao | University of California: San Diego, U.S.A. |
| Douglas Patz | Agile Learning Center, New York, U.S.A. | |
| Dzintars Klušs | Riga State Gynmasium No. 1, Latvia | |
| Fredrik Mattisson | Uppsala University, Sweden | |
| Louis de Forcrand | Geneva University, Switzerland | |
| Maksim Podkorytov | Florida State University, Florida, U.S.A. | |
| Mohammed Malik | Turku International School, Finland | |
| P R Vaidyanathan | Indian Institute of Technology Gandhinagar, India | |
| Rasmus Précenth | Uppsala University, Sweden | |
| Zoe Kane | Greenville Technical College, South Carolina, U.S.A. |
Published solutions
- rak1507: Phase 1
- Teggy: Phases 1 + 2
2020
| Grand Prize | Andrii Makukha | University of Hong Kong, China |
| 2nd Place | Dzintars Klušs | Riga State Gymnasium No. 1, Latvia |
| 3rd Place | Joshua King | University of New South Wales, Australia |
| Professional Prize | Woosuk Kwak | South Korea |
| Phase II | Brendan King | Rose-Hulman Institute of Technology, Indiana, U.S.A. |
| Federico Landonio | Liceo Scientifico GB Grassi Saronno, Italy | |
| Iiro Tapio Rastas | University of Turku, Finland | |
| Louis de Forcrand | Geneva University, Switzerland | |
| Zoe Kane | Greenville Technical College, South Carolina, U.S.A. | |
| Phase I | Chiang Yu-Chi | National Central University, Taiwan |
| Dzintars Klušs | Riga State Gymnasium No. 1, Latvia | |
| Federico Landonio | Liceo Scientifico GB Grassi Saronno, Italy | |
| Joel Niemelä | home schooling, Texas, U.S.A. | |
| Joshua King | University of New South Wales, Australia | |
| Maksim Podkorytov | Florida State University, Florida, U.S.A. | |
| Mattia Borgo | University of Padua, Italy | |
| Mohammed Malik | University of Pavia, Italy | |
| Rafael Rodrigues Rocha de Melo | Kyoto University, Japan | |
| Zoe Kane | Greenville Technical College, South Carolina, U.S.A. |
Published solutions
2021
The 2021 round began on February 21 and closed on July 30.[1]
Winners
Announcement and biographies.
| Grand Prize | Dzintars Klušs | Riga State Gymnasium No. 1, Latvia |
| 2nd Place | Victor Ogunlokun | Obafemi Awolowo University, Nigeria |
| 3rd Place | Aaron Paterson | Quinnipiac University, Connecticut, U.S.A. |
| Special Recognition | Mehdi Zribi | Liceo Scientifico GB Grassi Saronno, Italy |
| Professional Prize | Julian Witte | Germany |
| Phase II | Alessandro Bassi | Liceo Scientifico GB Grassi Saronno, Italy |
| Rory Kemp | Edinburgh Academy, U.K. | |
| Federico Landonio | Liceo Scientifico GB Grassi Saronno, Italy | |
| Douglas Patz | home schooled, New York, U.S.A. | |
| Qifan Wang | Auburn University, Alabama, U.S.A. | |
| Phase I | Joseph Adams | Heinrich Heine University Düsseldorf, Germany |
| Mattia Borgo | University of Padua, Italy | |
| Peter Mikkelsen | Aalborg University, Denmark | |
| Raghu Ranganathan | SRM Institute of Science and Technology, India | |
| Rafael Rodrigues Rocha de Melo | Kyoto University, Japan | |
| Vladimir Sotirov | University of Wisconsin-Madison, Wisconsin, U.S.A. | |
| Oskar von Seeler | Georg August University of Göttingen, Germany | |
| Qifan Wang | Auburn University, Alabama, U.S.A. | |
| Chiang Yu-Chi | National Taiwan University of Science and Technology, Taiwan | |
| Mehdi Zribi | Liceo Scientifico GB Grassi Saronno, Italy |
Published solutions
- (anonymous): Phase 1
- dzaima: Phase 1
- LdBeth: Phase 1
- Mehdi Zribi: Phase 1, Phase 2
- rak1507: Phase 1, Phase 2
- Razetime: Phase 1, Phase 2
2022
The 2022 round began on March 22 and closed on July 29.[2]
Winners
Announcement and biographies.
| Grand Prize | Tzu-Ching Lee | National Tsing Hua University, Taiwan |
| 2nd Place | Rory Kemp | Edinburgh Academy, U.K. |
| 3rd Place | Dzintars Klušs | Rīgas Tehniskā Universitāte (Riga Technical University), Latvia |
| Professional Prize | Michael Higginson | Canada |
| Phase II | Brian Ellingsgaard | Klaksvik Technical School, Faroe Islands |
| Sergey Ichtchenko | University of Helsinki, Finland | |
| Ajai Nelson | Oberlin College, Ohio, U.S.A. | |
| Oskar von Seeler | Georg August University of Göttingen, Germany | |
| Mehdi Zribi | Liceo Scientifico GB Grassi Saronno (GB Grassi Scientific High School in Saronno), Italy | |
| Phase I | Mattia Borgo | University of Padua, Italy |
| Ronzoni Gabriele | Liceo Scientifico GB Grassi Saronno (GB Grassi Scientific High School in Saronno), Italy | |
| Sergey Ichtchenko | University of Helsinki, Finland | |
| Rory Kemp | Edinburgh Academy, U.K. | |
| Dzintars Klušs | Riga Technical University, Latvia | |
| Natanael Lundberg | Grillska gymnasiet Uppsala (Uppsala High School), Sweden | |
| Raghu Ranganathan | SRM Institute of Science and Technology, India | |
| Oskar von Seeler | Georg August University of Göttingen, Germany | |
| Kamila Szewczyk | I Liceum Ogólnokształcące (Warsaw High School), Poland | |
| Mehdi Zribi | Liceo Scientifico GB Grassi Saronno (GB Grassi Scientific High School in Saronno), Italy |
Published solutions
- Stefan Kruger: Phase 1 and 2
- Peter Mikkelsen: Phase 2
- LdBeth: Phase1, Phase2
- Akmy: Phase 1 and 2
2023
The 2023 round began on March 6 and closed on July 28.[3]
Winners
Announcement and biographies.
| Grand Prize | Andrea Piseri | Università degli Studi di Milano (University of Milan), Italy |
| 2nd Place | Rory Kemp | University of Oxford, U.K. |
| 3rd Place | Dzintars Klušs | Rīgas Tehniskā Universitāte (Riga Technical University), Latvia |
| Professional Prize | Alexander Block | |
| Phase II | Kamila Szewczyk | Universität des Saarlandes (Saarland University), Germany |
| Madeline Vergani | Liceo Statale Scientifico e Classico "E. Majorana", Desio (Scientific and Classical State High School “E. Majorana”), Italy | |
| Daniel Vlasits | University of Cambridge, U.K. | |
| Oskar von Seeler | Georg-August-Universität Göttingen (Georg August University of Göttingen), Germany | |
| Qifan Wang | Auburn University, Alabama, U.S.A. | |
| Phase I | Brian Ellingsgaard | Tekniski Skúli í Klaksvík (Klaksvik Technical School), Faroe Islands |
| Mitchell Johnstone | Milwaukee School of Engineering, Wisconsin, U.S.A. | |
| Federico Landonio | Università degli Studi di Milano (University of Milan), Italy | |
| Tzu-Ching Lee | National Tsing Hua University, Taiwan | |
| Andrea Piseri | Università degli Studi di Milano (University of Milan), Italy | |
| Gabriele Ronzoni | Università degli Studi di Milano (University of Milan), Italy | |
| Kamila Szewczyk | Universität des Saarlandes (Saarland University), Germany | |
| Madeline Vergani | Liceo Statale Scientifico e Classico "E. Majorana", Desio (Scientific and Classical State High School “E. Majorana”), Italy | |
| Oskar von Seeler | Georg-August-Universität Göttingen (Georg August University of Göttingen), Germany | |
| Mehdi Zribi | Politecnico di Milano (Polytechnic University of Milan), Italy |
References
- ↑ Dyalog Ltd. 2021 APL Problem Solving Competition Announced by Dyalog Ltd. News about Dyalog. Feb 12, 2021.
- ↑ Dyalog Ltd. 2022 APL Problem Solving Competition Announced by Dyalog Ltd. News about Dyalog. Mar 22, 2022.
- ↑ Dyalog Ltd. 2023 APL Problem Solving Competition Announced by Dyalog Ltd. News about Dyalog. Mar 6, 2023.
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