Leetcode 223: Rectangle Area, leetcoderectangle

Leetcode 223: Rectangle Area, leetcoderectangle
Rectangle AreaTotal Accepted:2205Total Submissions:8138

Find the total area covered by twoRectilinearRectangles in2DPlane.

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 valueInt.

[Idea]

Obtain the area of the two regions, and then subtract the area of the overlapping.

[CODE]

public class Solution {    public int computeArea(int A, int B, int C, int D, int E, int F, int G, int H) {        int area1 = (C-A) * (D-B);        int area2 = (G-E) * (H-F);                int overlapRegion = overlap(A, B, C, D, E, F, G, H);        return area1 + area2 - overlapRegion;    }        private int overlap(int A, int B, int C, int D, int E, int F, int G, int H) {        int h1 = Math.max(A, E);        int h2 = Math.min(C, G);        int h = h2 - h1;                int v1 = Math.max(B, F);        int v2 = Math.min(D, H);        int v = v2 - v1;                if(h<=0 || v<=0) return 0;        else return h*v;    }}