There will be five tasks in a problemset. Four of them are standard algorithmic problems with partial solutions allowed — you get points for every test that you solution passed. And the last task is an approximation problem — you score for this task depends on how good your solution is comparing to current best solution.
laoriu is author of this problemset — you may know him from preparing Codeforces Round #277 (Div. 2) and December Clash 2014. I was working on this contest as a tester. I would like to say that I find this problemset interesting and it was also a great experience for me to work with laoriu on preparing it. Also I want to thank to chandan111 who helped me a lot with technical part of preparation.
Top 3 winners will receive HackerEarth T-shirt. (I already got mine for one of previous contests :) )
Good luck to everybody — I hope to see you at the scoreboard :)
The contest has ended! Thanks to everyone for participating:)
Congratulations to winners: