- Roland Geider – https://github.com/rolandgeider
- Helen Sherwood-Taylor - https://github.com/helenst
- Tushar Gupta - https://github.com/Tushar-Gupta
- Matheus Zorzete Marchiore - https://github.com/marchiore
- Yu Yu Aung - https://github.com/max111
- Laszlo Ratsko - https://github.com/rlaszlo
- James Simas - https://github.com/jamessimas
- Benny Tran - https://github.com/tranbenny
- Roman Pavlov - https://github.com/romansp
- Mihail Burduja - https://github.com/warchildmd
- Colin Hare - https://github.com/cthare
- Ryan Hughes - https://github.com/purplebird
- Alexandre Murphy-Gonthier - https://github.com/murphyalexandre
- Verdi R-D: https://github.com/azend
- Alois: https://github.com/alokhan
- Alelevinas: https://github.com/alelevinas
- Jacob Stoebel: https://github.com/jstoebel
- Peter van der Does: https://github.com/petervanderdoes
- Malcolm Jones: https://github.com/DevloperMal
- Boniface Mwenda: https://github.com/andela-bmwenda
- Scott Peshak: https://github.com/speshak
- Musanje Louis Michael: https://github.com/louiCoder
- Kevin Antonio Rateni Iatauro: https://github.com/WalkingPizza
- Sven - https://github.com/Svn-Sp
- Christopher OConnell - https://github.com/oconnelc
- Biplov - https://github.com/beingbiplov
- Rashmi Kamath - https://github.com/Rkamath2
- Anthony (Ryo) Wright - https://github.com/ryowright
- Nikitha Murikinati - https://github.com/nikithamurikinati
- Harlene Samra - https://github.com/harlenesamra
- Justine Cho - https://github.com/jcho17
- Vaheeshta Mehrshahi - https://github.com/vaheeshta
- Jeevika Ghosh - https://github.com/jeevikaghosh
- Austin Leung - https://github.com/austin-leung
- Harlene Samra - https://github.com/harlenesamra
- Nikitha Murikinati - https://github.com/nikithamurikinati
- Justine Cho - https://github.com/jcho1
- Lydia Xing - https://github.com/lydiaxing
- Ellie Qiu - https://github.com/eq8913
- Hita Kambhamettu - https://github.com/Hita-K
- Derek Li - https://github.com/derekli17
- Noah Pinter - https://github.com/nopinter
- Kevin Geng - https://github.com/gengkev
- Karmen Lu - https://github.com/klu17
- Aaron Kimbrell - https://github.com/aronwk-aaron
- Aaron Bassett - https://github.com/aaronbassett
- Rachael Wright-Munn - https://github.com/ChaelCodes
- Will Pearson - https://github.com/qagoose
- Brad Johnson - https://github.com/bradsk88
- Sidrah Madiha Siddiqui https://github.com/Sidrah-Madiha
- Calvin Walden - https://github.com/calvinrw
- Jack Mulligan - https://github.com/jackmulligan-ire
- Kristopher Newsome - https://github.com/sysadmin75
- Emma Muth - https://github.com/emmaamuth
- Sophia Reed - https://github.com/sophialr
- Leninux - https://github.com/RedRudeBoy
- Ayush Kumar - https://github.com/gr8ayu
- Gorkem Arslan - https://github.com/gorkemarslan
- Lucas Stone-Drake - https://github.com/LucasSD
- absolutely-not-bot - https://github.com/absolutely-not-bot
- Jaspreet Dhillon - https://github.com/jaspreetsd902
- Sofiko Alaverdashvili - https://github.com/sophiamartelli
- Oebele Lijzenga - https://github.com/olijzenga
- Kade - https://github.com/kp5431/
- Tom Bowyer - https://github.com/ImTheTom
- Rohan Karan - https://github.com/RohanKaran
- Mohammad Rafigh - https://github.com/mohammadrafigh
- Bernardo Koen - https://github.com/BernardoKoen
- Gabriel Liss - https://github.com/gabeliss
- Alexandra Rhodes - https://github.com/arhodes130
- Jayanth Bontha - https://github.com/JayanthBontha
- Roelof Rietbroek https://github.com/strawpants
- Ethan Winters - https://github.com/ebwinters
- Dieter Plaetinck - https://github.com/Dieterbe
- Jonathan La Field - https://github.com/JLaField
- Taylor Fuller - https://github.com/taylor-fuller
- Bulgarian:
- Lyuboslav Petrov
- Czech:
- Tomáš Z.
- Dutch:
- David Machiels
- Arthur van Rooijen
- Hans Poelmans
- Oscar Gala Grano
- Philip Plaeke
- Greek:
- Mark Nicolaou
- Ruth Bochere
- Norwegian:
- Jon-Sindre Husum
- w00p
- Stian Lundanes
- Portuguese:
- Jefferson Campos
- Danilo Silva
- Matheus Zorzete Marchiore
- Nari Gao
- Russian:
- Andrew
- Inna
- Maxim Dushniak
- MrClon
- Stepa
- Spanish:
- Acv2 Facundo
- Damian Suarez
- Enrique Garcia
- jgrdpy
- Manuel
- Naty Quin
- Swedish:
- Housame Oueslati
- Olle Karlsson
- oskarmalm
- ywecur
- French:
- Alex Deneuvillers
- Alexis
- ckoker
- Gauthier Flichy
- Jeremy Barascut
- Jordane Pelloux-Prayer
- Mickael Fortunato
- Nicolas Roby
- Olivier
- Quentin Galliou
- Serge S
- Italian
- Agostino Lecci
- lediable
- Roberta Guarino
- Sergio Oliva
- Sergio Zampello
- Polish
- Andrzej
- Arkady Asuratov
- Filip Makowski
- Krzysztof Tataradziński
- Marius
- Michał Jastrzębowski
- Marcin Schoenknecht
- Ukrainian
- Artem Polivanchuk
- Inna
- MikeLMI
And of course many thanks as well to everyone that submitted exercises!