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.
Assume that the total area is never beyond the maximum possible value of int.
解题思路：
几何题目。
代码如下：
public class Solution {
public int computeArea(int A, int B, int C, int D, int E, int F, int G, int H) {
int areaOfA = (C - A) * (D - B);
int areaOfB = (G - E) * (H - F);
int left = Math.max(A, E);
int right = Math.min(C, G);
int top = Math.min(D, H);
int bottom = Math.max(B, F);
int overlap = 0;
if(right > left && top > bottom)
overlap = (right - left) * (top - bottom);
return areaOfA + areaOfB - overlap;
}
}