g0901_1000.s0954_array_of_doubled_pairs

Class Solution

java.lang.Object

g0901_1000.s0954_array_of_doubled_pairs.Solution

public class Solution
extends 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 and Description
Solution()

Method Summary

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

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

canReorderDoubled

public boolean canReorderDoubled(int[] arr)