Hello CodeForces Community!

We’re excited to invite you for the July Long Challenge 2018 sponsored by ShareChat. Join us for ten intense days of coding challenges! Joining me on the problem setting panel are:

• Problem Tester: Enchom (Encho Mishinev)
• Problem Authors: qoo2p5 (Daniil Nikolenko), ohweonfire (Sunli Chen), rajat1603 (Rajat De), teja349 (D Teja Vardhan Reddy), taran_1407 (Taranpreet Singh), (Zeren Li), scube97 (Shubham Sangamnerkar), AndrewB330 (Andrey Borzyak), Barichek (Ihor Baranblat), Reziba (Abizer Lokhandwala), i_am_groot_ (Anuj Maheshwari)
• Problem Editorialist: adamant (Alexander Kulkov)
• Statement Verifier: Xellos (Jakub Safin)
• Russian Translator: CherryTree (Sergey Kulik)
• Mandarin Translator: huzecong (Hu Zecong)
• Vietnamese Translator: VNOI Team

And special thanks to mgch (Misha Chorniy) for coordinating the contest preparation!

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

Contest Details:

Time: 6th July 2018 (1500 hrs) to 16th July 2018 (1500 hrs). (Indian Standard Time — +5:30 GMT) — Check your timezone.

Contest link: https://www.codechef.com/JULY18

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: Top 10 performers in Global and Indian category will get CodeChef laddus, with which the winners can claim cool CodeChef goodies. Know more here: discuss.codechef.com/questions/51999/how-do-i-win-a-codechef-goodie.
(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!!