Dev Day 2018

Turbine Kreuzberg Dev Day 2018 Coding Challenge

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Dev Day 2018 is a 1 day developer conference in Berlin & Faro on May 26th 2018, packed with talks on a wide variety of topics. If you prefer to show off you developer super powers that day, we got you covered as well! Hack along the day using the challenges in this contest and make it to the top of the leaderboard!


  • 2 minutes of stage time to introduce you to the audience for the first 5 contestants
  • something to read for the three leading people in the leaderboard (in Berlin)
  • everlasting fame


  • The creator of this contest is solely responsible for setting and communicating the eligibility requirements associated with prizes awarded to participants, as well as for procurement and distribution of all prizes. The contest creator holds HackerRank harmless from and against any and all claims, losses, damages, costs, awards, settlements, orders, or fines.
  • Code directly from our platform, which supports over 30 languages. Learn more here.
  • you can only win sth if you're in the audience in the end.
  • if you don't have a hackerrank account yet, pls add a bln or faro suffix to it
  • try to solve the challenges in several languages
  • Unlike in other scenarios we encourage you to stick your heads together to solve the challenges if you want to.
  • if you make it onto the leaderboard your account id might be shown on stage
  • if you are among the first 5 contestants you're supposed to hit the stage :)
  • if we had enough attendees in either location we're fighting it out between Berlin and Faro :)


  • Each challenge has a pre-determined score.
  • A participant’s score depends on the number of test cases a participant’s code submission successfully passes.
  • If a participant submits more than one solution per challenge, then the participant’s score will reflect the highest score achieved. In a game challenge, the participant's score will reflect the last code submission.
  • Participants are ranked by score. If two or more participants achieve the same score, then the tie is broken by the total time taken to submit the last solution resulting in a higher score

Sign up for Dev Day 2018 now.

Not a genuine coding contest?