Hello Codeforces Community,

I invite you all to join HackerRank's World Codesprint 12 starting on 14 December 2017. The contest duration is 48 hours.

The winners of the contest will win up to 1000USD cash prizes. Also, there are opportunities to win some nice hoodies.

The contest will be rated. If two persons get the same score, the person who reached the score first will be ranked higher. There will be 7 algorithmic challenges in the contest.

The problems are prepared by sreka11, krismaz, nezametdinov, forthright48, muratekici, shashank21j, pkacprzak, Xsquare, danilka.pro, Golovanov399, niyaznigmatul and myself.

Good luck, and I hope you enjoy the problems!

P.S. I hope I got all the CF handles right.