g0801_0900.s0850_rectangle_area_ii

Class Solution

java.lang.Object

g0801_0900.s0850_rectangle_area_ii.Solution

public class Solution
extends Object

850 - Rectangle Area II.

Hard

You are given a 2D array of axis-aligned rectangles. Each rectangle[i] = [xi1, yi1, xi2, yi2] denotes the ith rectangle where (xi1, yi1) are the coordinates of the bottom-left corner, and (xi2, yi2) are the coordinates of the top-right corner.

Calculate the total area covered by all rectangles in the plane. Any area covered by two or more rectangles should only be counted once.

Return the total area. Since the answer may be too large, return it modulo 109 + 7.

Example 1:

Input: rectangles = 0,0,2,2],[1,0,2,3],[1,0,3,1

Output: 6

Explanation: A total area of 6 is covered by all three rectangales, as illustrated in the picture.

From (1,1) to (2,2), the green and red rectangles overlap.

From (1,0) to (2,3), all three rectangles overlap.

Example 2:

Input: rectangles = 0,0,1000000000,1000000000

Output: 49

Explanation: The answer is 10¹⁸ modulo (10⁹ + 7), which is 49.

Constraints:

• 1 <= rectangles.length <= 200
• rectanges[i].length == 4
• 0 <= xi1, yi1, xi2, yi2 <= 109

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
int	rectangleArea(int[][] rectangles)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

rectangleArea

public int rectangleArea(int[][] rectangles)