Chefs and Voting for best friend

There are n chef's in Chefland. There is a festival in Chefland in which each chef is asked to vote a person as his best friend. Obviously, a person can't vote himself as his best friend. Note that the best friend relationship is not necessarily bi-directional, i.e. it might be possible that x is best friend of y, but y is not a best friend of x. Devu was the election commissioner who conducte