The CodeChef January Long Challenge has started. This programming contest runs from 1500 Indian Standard Time (IST) 4 January 2018 until 1500 IST 14 January 2018. IST is 5:30 hours ahead of UTC time.

There are two divisions, depending on the rating of the user. Division 1 is for users with a higher rating; Division 2 is for newer users.

Division 1 Questions

Division 2 Questions

This contest has attracted attempts to cheat in past months. Should you encounter a suspicious question, please vote to close it and notify the moderators so that it can be closed for the duration of the contest, as per site policy. The questions tend to be about algorithms related to combinatorics, graph theory, or number theory.

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    $\begingroup$ Thanks for informing us. Does this competition happen every month? $\endgroup$ – Mohammad Zuhair Khan Jan 4 at 16:39
  • $\begingroup$ @MohammadZuhairKhan According to the site's about page, they host three contests each month. Judging by the site's compete page, they include a long challenge and two shorter challenges called the lunchtime and cook-off challenges. That is about the extent of my knowlege. My familiarity with the contest resulted from encountering past attempts to cheat on this site. $\endgroup$ – N. F. Taussig Jan 4 at 17:53

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