LeetCode: Rectangle Area

Difficulty: how to get dist_w/h.
At first I just got this distance with a difference from points ==!

dist_w/h ==> the distance between two farthest horizontal/vertical points of two rectangles
rep_w/h ==>repetition distance of width and height

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class Solution { public: int computeArea(int A, int B, int C, int D, int E, int F, int G, int H) { int width1=abs(A-C); int width2=abs(E-G); int height1=abs(B-D); int height2=abs(F-H); int dist_w= ((C>G)?C:G) - ((A<E)?A:E) ; int dist_h= ((D>H)?D:H) - ((B<F)?B:F); int rep_w=abs(width1+width2-dist_w); int rep_h=abs(height1+height2-dist_h); int area_sum=width1*height1+width2*height2; if(dist_w<(width1+width2) && dist_h<(height1+height2)) return area_sum-rep_w*rep_h; return area_sum; } };