Hello CodeForces Community!

Chef is back again to treat you with his next delicious offering: The November Long Challenge! You are invited to showcase your coding talent and bag exciting cash prizes and goodies.

Joining me on the problem setting panel, we have:

• Problem Authors: chemthan (Trung Nguyen), altruist (Denis Anischenko), Zain (Zain Ali), PraveenDhinwa (Praveen Dhinwa), Ioser (Hanlin Ren), code_hard123 (Dipjal Chhetri), Reziba (Abizer Lokhandwala)
• Problem Tester: iscsi (Istvan Nagy)
• Editorialist: adamant (Alexander Kulkov)
• Admin: kingofnumbers (Hasan Jaddouh)
• Russian Translator: CherryTree (Sergey Kulik)
• Mandarin Translator: huzecong (Hu Zecong)
• Vietnamese Translator: Team VNOI

I hope you will enjoy solving the problems. Please give your feedback on the problem set in the comments below after the contest.

Contest Details:

Time: 3rd November 2017 (1500 hrs) to 13th November 2017 (1500 hrs). (Indian Standard Time — +5:30 GMT) — Check your timezone.

Details: https://www.codechef.com/NOV17

Registration: You just need to have a CodeChef handle to participate. For all those, who are interested and do not have a CodeChef handle, are requested to register in order to participate.

Prizes: For Indians: 1st prize: INR 12000/- 2nd prize: INR 8000/- For Rest of the World: 1st prize: $400 2nd prize: $300 Top 10 global and top 20 Indian winners get 300 Laddus each, with which the winners can claim cool CodeChef goodies. Know more here: https://www.codechef.com/laddu. (For those who have not yet got their previous winning, please send an email to winners@codechef.com)

Good Luck! Hope to see you participating!