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Circle quadrilateral area
Description:// N point on circle average distribution, choose the m, out of 4 in the m, 4 points with the largest area, and the output of the area value.
//timeout ideas: first on the M number of the same sort, delete elements, the combination of all two two points respectively to find the largest area, then calculate the area
//modifications: because of symmetry, which will take 0 points, so just as the largest area and the 0 combination.