分治法解最近点对问题：首先输入点的个数，然后输入点的坐标，输出先是根据x的坐标对点进行排序，然后输出最近点对的距离。-Divide and conquer solution of the nearest point of the problem: First, the number of input points, and then enter the coordinates of points, the output first, according to the coordinates of the points x sort, and then output the nearest point of the distance.