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1637. Widest Vertical Area Between Two Points Containing No Points

Difficulty Topics

Description

Given n points on a 2D plane where points[i] = [xi, yi], Return the widest vertical area between two points such that no points are inside the area.

A vertical area is an area of fixed-width extending infinitely along the y-axis (i.e., infinite height). The widest vertical area is the one with the maximum width.

Note that points on the edge of a vertical area are not considered included in the area.

 

Example 1:

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Input: points = [[8,7],[9,9],[7,4],[9,7]]
Output: 1
Explanation: Both the red and the blue area are optimal.

Example 2:

Input: points = [[3,1],[9,0],[1,0],[1,4],[5,3],[8,8]]
Output: 3

 

Constraints:

  • n == points.length
  • 2 <= n <= 105
  • points[i].length == 2
  • 0 <= xi, yi <= 109

Solution

widest-vertical-area-between-two-points-containing-no-points.py
class Solution:
    def maxWidthOfVerticalArea(self, points: List[List[int]]) -> int:
        if not points: return 0

        points.sort(key = lambda x : (x[0], x[1]))

        res = 0
        prevX = points[0][0]
        for x,y in points[1:]:
            if x == prevX:
                continue
            else:
                res = max(res, x - prevX)
            prevX = x

        return res