Geometry
892 Surface Area of 3D Shapes Intuition : For each tower, its surface area is 4 * v + 2 However, 2 adjacent tower will hide the area of connected part. The hidden part is min(v1, v2) and we need just minus this area * 2 Time Complexity : O(N^2) 963 Minimum Area Rectangle II Iterate all possible triangles and check the opposite points that creating a quadrilateral. Time complexity: O(n^3) Space complexity: O(n)