LeetCode - 223. Rectangle Area

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.

Example:

Input: A = -3, B = 0, C = 3, D = 4, E = 0, F = -1, G = 9, H = 2
Output: 45

    不知道这题为什么是Medium，这比Easy的还Easy吧。

int computeArea(int A, int B, int C, int D, int E, int F, int G, int H)
{
    int cross = 0;
    int top = min(D, H);
    int bottom = max(B, F);
    int left = max(A, E);
    int right = min(C, G);
    if(top > bottom && left < right)
        cross = (top - bottom) * (right - left);
    return (((C - A) * (D - B)) + ((G - E) * (H - F)) - cross);
}