给出平面上的N 个二维点，求出距离最小的2 个点对。本题中距离定义为他们的直 线距离。例如(0,0) (3,4)的距离为5.-Plane gives the N-dimensional point, the minimum distance obtained two points pairs. This question is defined as the distance of their straight-line distance. For example, (0,0) (3,4) d