All of Daniel_I._Lewis's Comments + Replies

Brian: How does the randomness tie in to acquired knowledge, and what is the superior non-random method making better use of that knowledge?
The knowledge in this case is your belief about the distribution of input lists. Let's say, for the sake of argument, that you get sorted lists (forwards or backwards) more often than chance, and the rest of the time you get a random permutation.

On a random list, one choice of pivot is as good as another. On a sorted list, though, the ends are always a bad choice. Picking the first item is thus stupider than averag... (read more)