Step through the Python implementation. Watch the algorithm decide which branches to visit and which to prune:
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The query point creates a new Voronoi region shown in blue, displacing some of the old regions. The weight of each natural neighbour is derived from the area of the displaced region .
* 核心思路：单调递增栈 + 控制删除位数（k0），优先移除高位大数，保证剩余数字最小