There is a little clerk who is rushing to a meeting, and there are only twenty minutes before the meeting starts. Then the clerk stops a taxi and says to the driver: "I'm in a hurry, please take the shortest way! " The driver asks: "Sir, should I take the shortest way or the fastest way?" The clerk curiously asks: "Isn't the shortest way the fastest way?" The driver said: "Of course not, it's rush hour now, and the shortest way will be jammed. If you are in a hurry, we need to go around, although it's longer...