Whistle-Stop Copenhagen

I have a theory. In every city, there are four overarching categories of tourist sites (although obviously there will always be some crossover), and for a successful city break, you need to visit at least one of each. I put this theory to the test when I visited Copenhagen recently, and had less than five hours to see all of it. So here it is; the single most whittled-down, focused tour of a city imaginable, based on the four types of places you need to see (plus one extra, which will become apparent later on).