Package g0301_0400.s0391_perfect_rectangle

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    391 - Perfect Rectangle.

    Hard

    Given an array rectangles where <code>rectanglesi = x<sub>i</sub>, y<sub>i</sub>, a<sub>i</sub>, b<sub>i</sub></code> represents an axis-aligned rectangle. The bottom-left point of the rectangle is <code>(x<sub>i</sub>, y<sub>i</sub>)</code> and the top-right point of it is <code>(a<sub>i</sub>, b<sub>i</sub>)</code>.

    Return true if all the rectangles together form an exact cover of a rectangular region.

    Example 1:

    Input: rectangles = \[\[1,1,3,3],3,1,4,2,3,2,4,4,1,3,2,4,2,3,3,4]

    Output: true

    Explanation: All 5 rectangles together form an exact cover of a rectangular region.

    Example 2:

    Input: rectangles = \[\[1,1,2,3],1,3,2,4,3,1,4,2,3,2,4,4]

    Output: false

    Explanation: Because there is a gap between the two rectangular regions.

    Example 3:

    Input: rectangles = \[\[1,1,3,3],3,1,4,2,1,3,2,4,2,2,4,4]

    Output: false

    Explanation: Because two of the rectangles overlap with each other.

    Constraints:

    • <code>1 <= rectangles.length <= 2 * 10<sup>4</sup></code>

    • rectangles[i].length == 4

    • <code>-10<sup>5</sup><= x<sub>i</sub>, y<sub>i</sub>, a<sub>i</sub>, b<sub>i</sub><= 10<sup>5</sup></code>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Boolean isRectangleCover(Array<IntArray> rectangles)

      • Methods inherited from class java.lang.Object

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