The challenge has ended :(
We want to send out a huge thank you to all participants. This was an incredible experience, you blew away all our expectations! Regardless of the final classification, we congratulate you all and we hope you had fun and learnt interesting things through our brain-boggling problems.
If you want to share how you solved any of the challenges, start writing! We will collect them and publish the best write-ups on our blog with full credits. Send them to contest at tuenti.com.
Want to keep hacking?
If you couldn't register in the challenge or didn't have enough time to complete all problems, you can try them here.