Package g0901_1000.s0954_array_of_doubled_pairs

Class Solution

java.lang.Object
g0901_1000.s0954_array_of_doubled_pairs.Solution
public class Solution extends java.lang.Object
954 - Array of Doubled Pairs.

Medium

Given an integer array of even length arr, return true if it is possible to reorder arr such that arr[2 * i + 1] = 2 * arr[2 * i] for every 0 <= i < len(arr) / 2, or false otherwise.

Example 1:

Input: arr = [3,1,3,6]

Output: false

Example 2:

Input: arr = [2,1,2,6]

Output: false

Example 3:

Input: arr = [4,-2,2,-4]

Output: true

Explanation: We can take two groups, [-2,-4] and [2,4] to form [-2,-4,2,4] or [2,4,-2,-4].

Constraints:

  • 2 <= arr.length <= 3 * 104
  • arr.length is even.
  • -105 <= arr[i] <= 105

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    canReorderDoubled(int[] arr)
     

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • canReorderDoubled

      public boolean canReorderDoubled(int[] arr)