Input: A set S of planar pointsOutput: A convex hull for SStep 1: If S contains no more than five points, use exhaustive searching to find the convex hull and return.Step 2: Find a median line perpendicular to the X-axis which divides S into SL and SR SL lies to the left of SR. Step 3: Recursively construct convex hulls for SL and SR. Denote these convex hulls by Hull (SL) and Hull (SR) respectively.Step 4: Apply the merging procedure to merge Hull (SL) and Hull (SR) together to form a convex hull. Time complexity: T (n) = 2T (n/2)+ O (n) = O (n log n)

convex hull
...........\convex hull.cpp

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