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 Object

954 - Array of Doubled Pairs.<p>Medium</p> <p>Given an integer array of even length <code>arr</code>, return <code>true</code> <em>if it is possible to reorder</em> <code>arr</code> <em>such that</em> <code>arr[2 * i + 1] = 2 * arr[2 * i]</code> <em>for every</em> <code>0 <= i < len(arr) / 2</code><em>, or</em> <code>false</code> <em>otherwise</em>.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> arr = [3,1,3,6]</p> <p><strong>Output:</strong> false</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> arr = [2,1,2,6]</p> <p><strong>Output:</strong> false</p> <p><strong>Example 3:</strong></p> <p><strong>Input:</strong> arr = [4,-2,2,-4]</p> <p><strong>Output:</strong> true</p> <p><strong>Explanation:</strong> We can take two groups, [-2,-4] and [2,4] to form [-2,-4,2,4] or [2,4,-2,-4].</p> <p><strong>Constraints:</strong></p> <ul> <li><code>2 <= arr.length <= 3 * 10⁴</code></li> <li><code>arr.length</code> is even.</li> <li><code>-10⁵ <= arr[i] <= 10⁵</code></li> </ul>

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)