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假如是硬枚举的话其实可以不用atan，直接用cross product判方向就可以了In Reply To:我先筛出圆内和圆上的点，然后atan算角，排序，然后枚举点，筛出从这个点开始的180度内的点的个数，取最大 Posted by:sunmoonstar_love at 2005-07-22 22:44:30 Followed by:
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