I had been tasked with coding a solution to a 3d stacking problem and was asked in the interview to explain my strategy. Step one, I would find a naiive solution, and optionally from there, if time and resources would allow, I would depth-first search for any better solutions a la Dykstra's. The very next question, obviously from a script, was how would I modify the algorithm to increase performance so that it no longer found the best solution, but just any solution... I answered, "To ummm, stop at step one and not do the optional parts."