Introduction - If you have any usage issues, please Google them yourself
Post office location problem description: a north-south direction and in accordance with what is divided into regular city blocks, n scattered settlements located in different neighborhoods. Showing something to coordinate with x, y coordinates used to represent the north and south. Positions of settlements can be represented by the coordinates (x, y). Requirements: In order to build the post office location, so that the n settlements the post office to the sum of the minimum. Tip: weighted median (divide and conquer algorithm)