Suppose we have a undirected graph and each vertex has a initial weight . The weight for each vertex is actually a rotation (in radium). I want to minimize the difference between and , such that the difference is less than . In order to adjust the difference , we are allowed to add or subtract multiples of to as needed, i.e. .Suppose we have a undirected graph and each ve
阅读背景：
最小化非有向图的相邻顶点之间的差异
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