Good news! Harbour.Space is supporting the return of a new series of educational rounds on Codeforces! You can read the details in the blog post.
On March 27, 17:35 MSK will be held Educational Codeforces Round 18.
You will be given 6 problems and 2 hours to solve them. We hope that everyone, both novices and experienced coders, will find something interesting in this contest. The contest will be unrated.
Wish you enjoy the contest! Good luck!
UPD2: All successful hacks have been added to the testsets, all submissions have been rejudged. Thank you for participating in the contest!