g1401_1500.s1453_maximum_number_of_darts_inside_of_a_circular_dartboard

Class Solution

java.lang.Object

g1401_1500.s1453_maximum_number_of_darts_inside_of_a_circular_dartboard.Solution

public class Solution
extends Object

1453 - Maximum Number of Darts Inside of a Circular Dartboard.

Hard

Alice is throwing n darts on a very large wall. You are given an array darts where darts[i] = [xi, yi] is the position of the ith dart that Alice threw on the wall.

Bob knows the positions of the n darts on the wall. He wants to place a dartboard of radius r on the wall so that the maximum number of darts that Alice throws lies on the dartboard.

Given the integer r, return the maximum number of darts that can lie on the dartboard.

Example 1:

Input: darts = [[-2,0],[2,0],[0,2],[0,-2]], r = 2

Output: 4

Explanation: Circle dartboard with center in (0,0) and radius = 2 contain all points.

Example 2:

Input: darts = [[-3,0],[3,0],[2,6],[5,4],[0,9],[7,8]], r = 5

Output: 5

Explanation: Circle dartboard with center in (0,4) and radius = 5 contain all points except the point (7,8).

Constraints:

• 1 <= darts.length <= 100
• darts[i].length == 2
• -104 <= xi, yi <= 104
• 1 <= r <= 5000

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
int	numPoints(int[][] points, int r)

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

numPoints

public int numPoints(int[][] points,
                     int r)