Hi everyone,

I'm excited to invite you to participate in Codechef October Cook-Off. The contest starts at Sunday, 23 October 2016, 16:00:00 UTC. In order to participate, you only need to have a CodeChef account. If you don't have one, you can register here.

All problems have been prepared by me. You might have seen some problems and contests set by me on various platforms. This is my second round on Codechef, after Cook-Off 50. Also, here is an old collection of my problems.

There will be five tasks and two and half hours for you to solve them. Contest will be rated and the top 10 performers in Global and Indian category will get CodeChef laddus; with them, you can claim CodeChef goodies. You can find out more here. (If you didn't get your previous goodies, you can contact winners@codechef.com.)

I'd like to thank Errichto for testing the problems, Antoniuk for Russian translations, Team VNOI for Vietnamese translations, huzecong for Mandarin translations. I specially want to thank PraveenDhinwa for his invaluable contributions in preparing the contest and being the contest admin and language verifier for problem statements.

I have tried to create a balanced and interesting problem set. I suggest you read all problems. I am expecting a lot of full scores. :)

Editorials(written by me) will be published right after the contest.
UPD 1: Editorials can be found at https://discuss.codechef.com/tags/cook75/
UPD 2: Applauds to top 6 who solved all 5 problems
1. anta
2. natsugiri
3. LHiC
4. biGinNer
5. uwi
6. chemthan

Hope you had fun. I'd love to hear your feedback on the quality of the problemset. :)