題目

Find the total area covered by two rectilinear rectangles in a 2D plane.

Each rectangle is defined by its bottom left corner and top right corner as shown in the figure.

Rectangle Area Assume that the total area is never beyond the maximum possible value of int.

Credits: Special thanks to @mithmatt for adding this PRoblem, creating the above image and all test cases.

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思路

要計算的面積是兩者各自的面積減去覆蓋的面積

代碼