平面上给定 n 个点，第 i 个点的坐标为 (x_i, y_i)。两个点 (x_1, y_1) 与 (x_2, y_2) 之间的欧几里得距离定义为 sqrt((x_1 - x_2)^2 + (y_1 - y_2)^2) 请你求出所有点对中距离的最小值。同一位置允许存在多个点；如果两个点重合，它们之间的距离为 0。 本题要求使用分治算法 ...

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