• Home
• com.github.javadev
• leetcode-in-java
• 1.38
• source code
• readme.md

×

Project download

Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $

You can buy this project and download/modify it how often you want.

g0901_1000.s0954_array_of_doubled_pairs.readme.md Maven / Gradle / Ivy

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