LeetCode 223 矩形面积[数学] HERODING的LeetCode之路

解题思路：
其实总面积是便是area1和area2面积之和减去重叠部分，两个矩形面积很好计算，重叠部分需要利用位置关系进行计算，得到其长宽即可，代码如下：

class Solution {
public:
    int computeArea(int ax1, int ay1, int ax2, int ay2, int bx1, int by1, int bx2, int by2) {
        int area1 = (ax2 - ax1) * (ay2 - ay1);
        int area2 = (bx2 - bx1) * (by2 - by1);
        int width = min(ax2, bx2) - max(ax1, bx1);
        int height = min(ay2, by2) - max(ay1, by1);
        int overlap = max(width, 0) * max(height, 0);
        return area1 - overlap + area2;
    }
};