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Competition overview

Hash Code is a team-based programming competition organized by Google. You pick your team and programming language, we pick a real-life engineering problem for you to solve. Are you up for the challenge?
For each round of the competition we’ll present a problem (see past problems here) and your team will write a program that generates a solution. Your team can submit as many solutions as you like using the online Judge System, and a live scoreboard will let you know how you stack up against the competition. Top scoring teams will win cool Google prizes, because of course you can’t host a programming competition without something to work for! Convinced?


Open now until
20th February 2017 18:00 CET
Hash Code is open to university students and industry professionals in Europe, the Middle East and Africa. Participants compete in teams of two to four. Registration is free of charge and will close on 20th February 2017 at 18:00 CET.

Online Qualification Round

23rd February 2017
18:30 to 22:30 CET
Your team will be tasked with solving a real-life challenge created by Google engineers using your own computer and programming language and tools of your choice. For this round, your team can compete from wherever you’d like, including from one of our Hash Code hubs.

Final Round

1st April 2017
9:30 to 21:30 CET
Top scoring teams from the Online Qualification Round will be notified on 28th February 2017 and invited to the Final Round at Google Paris. We’ll present a second challenge, and the winning teams will be awarded cool Google prizes. In addition to the competition, participants will also get the chance to learn more about Google through a variety of tech talks and presentations.

Online Qualification Round

Thursday, 23rd February 2017, 18:30 to 22:30 CET
18:00 CET
The countdown begins!
You will receive an email with instructions for the Online Qualification Round, including how to access the Problem Statement and how to view the YouTube Live Stream.
18:30 CET
The task is announced
We will introduce the competition and explain the task through a YouTube Live Stream.
18:45 CET
The competition starts!
We’ll release the problem statement as a PDF file that can be downloaded from the Judge System. You’ll be able to submit your team’s solution through the Judge System at any time, and a live scoreboard will be available.
21:30 CET
The live scoreboard freezes
To increase suspense and make the end of the competition more exciting, the live scoreboard will freeze. You’ll still be able to submit new submissions until the deadline.
22:30 CET
Time's up!
The Judge System will accept submissions until Thursday, February 23th 22:30 CET sharp. A few minutes after the submission deadline, the final scoreboard will be available on the Judge System so that your team can compare its achievements with others. The final results and the teams qualified for the Final Round will be announced on 28th February 2017.

What do I need to participate?

The only thing you need for the Online Qualification Round is a computer connected to the Internet. We will announce the problem through a YouTube Live Stream, please check that your computer is able to play YouTube videos beforehand. The Judge System will be available as a web application, compatible with recent web browsers. For the rest of your computer setup, you're free to use the tools and programming languages of your choice.

How will I receive information?

We will add all participants to a mailing list, and will send all relevant information there (so monitor your mailbox!). The problem statement will be available on the Judge System, and we will also post any clarification to the problem statement there. You’ll also be able to get in touch with us over email if you have any questions.

How should I prepare?

You should carefully review the rules of the competition. It may also be helpful to look at problem statements from past editions of Hash Code. We encourage you to practice together with your teammates, and agree on the programming languages and tools you'd like to use. You should prepare an empty "Hello World!" project on your computer, with a script to generate the ZIP file to upload the source code to the Judge System.

Final Round

Saturday, 1st April 2017, 9:30 to 21:30 CET

Where is the Google office in Paris?

The Google Paris office is located 8 rue de Londres in Paris. It's in the city center of Paris near Gare Saint-Lazare and the Opera, in the same district as the famous department stores. It's easily accessible via many subway stations.

What about travel and accommodation?

Participants will be responsible for arranging their own travel and accommodation. Participants will be able to apply for a travel grant from Google (between 100 and 500 EUR) in order to help offset these costs. If selected, participants will receive the grant after the Final Round takes place.

What do I need to bring?

The only thing you absolutely need to bring is your own laptop (with its charger!). You may also bring your own separate keyboard and mouse, but this is not a must. We will offer free Internet connection by Wifi. Please note that wired connection is not available.