Hello CodeForces Community,

I would like to invite everyone to CodeChef December LunchTime 2017 at https://www.codechef.com/LTIME55. This is the last lunchtime of the year .For those who aren’t aware, LunchTime is an IOI Style contest consisting of 4 problems wherein you can score based upon the number of test cases you pass in the problem.

I hope you enjoy solving the problems. Please give your feedback on the problemset in the comments below after the contest. You shall find the rest of the details about the contest below.

Time: 30th December 2017 (1930 hrs) to 30th December 2017 (2230 hrs). (Indian Standard Time — +5:30 GMT)

Check your timezone here — https://www.timeanddate.com/worldclock/fixedtime.html?msg=Codechef+LunchTime&iso=20171230T1930&p1=176&ah=3

Details: https://www.codechef.com/LTIME55

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: https://www.codechef.com/laddu.

Good Luck! Hope to see you participating! Wishing everyone high ratings!