题目描述：
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.
![[LeetCode]Rectangle Area](https://leetcode.com/static/images/problemset/rectangle_area.png)
Assume that the total area is never beyond ...
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.
Assume that the total area is never beyond ...