Hi Codeforces!

I want to tell you about the annual programming contest, hosted by Spain-based company Tuenti.

This year the online phase will take place from 27 April to 4 May. I participated last year, and the format of the online phase was quite interesting. Besides the usual algorithmic problems, there were problems on cryptography, like MitM attack of Diffie-Hellman or AES bruteforce, and problems "without description", when one should guess it from hidden hints. Problems had to be solved consecutively, so that a participant could not read the next one unless she solved the previous. But several passes were allowed.

Details:

• link: https://contest.tuenti.net/

• start time in your TZ

• duration: 7 days

• prizes include cloth and gadgets :-)