leetcode[223]:Rectangle Area

Rectangle Area

#define min(a,b)(a<b?a:b)#define max(a,b)(a>b?a:b)int computeArea(int A, int B, int C, int D, int E, int F, int G, int H) {    int area1,area2,area3;    area1 = (C-A) * (D-B);    area2 = (G-E) * (H-F);    if(G <= A || C <= E || H <= B || F >= D) area3 = 0;    else area3=(min(G,C)-max(A,E))*(min(H,D)-max(B,F));    return area1 + area2 - area3;}

第一反应分类讨论，发现情形太多了，放弃。。。
找有交集时候的通解即可。