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.
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Input: A = -3, B = 0, C = 3, D = 4, E = 0, F = -1, G = 9, H = 2 Output: 45
题目大意:
计算坐标轴中的面积大小。
解法:
计算两个长方形的面积,如果有重叠的部分,减去重叠部分的面积。我是分情况考虑的,但最后做出来发现忽略了很多情况,参考了网上的解法,这里计算重叠部分的面积很巧妙。
java:
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),area2=(G-E)*(H-F); int left=Math.max(A,E); int right=Math.min(C,G); int bottom=Math.max(B,F); int top=Math.min(D,H); int overlap=0; if(left<right && bottom<top){ overlap=(right-left)*(top-bottom); } return area1+area2-overlap; } }

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