Comments

Your solution 310035708 for the problem 2074D significantly coincides with solutions Programmers_Hive/310035708, heet070/310134550.

Codeforces Round 1009 (Div. 3)

Surprisingly, I don't even know this person. This is somehow a coincidence. I don't even know who this person is.

How can I set questions for codeforces contest? What are prerequisites?