"The residents of the underground city of Zion defend themselves through a combination of kung fu, heavy artillery, and efficient algorithms."
"You have at your disposal an electromagnetic pulse (EMP), which can destroy some of the robots as they arrive."
"A technique that is often helpful in searching for an efficient algorithm is to assume, as a thought experiment, that one knows something partial about the optimal solution, and then to see how one would make use of this partial knowledge in finding the complete solution."