Package g0901_1000.s0954_array_of_doubled_pairs

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    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:

    • <code>2 <= arr.length <= 3 * 10<sup>4</sup></code>

    • arr.length is even.

    • <code>-10<sup>5</sup><= arri<= 10<sup>5</sup></code>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Boolean canReorderDoubled(IntArray arr)

      • Methods inherited from class java.lang.Object

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