shuffle-the-array

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Algorithms

Given the array <code>nums</code> consisting of <code>2n</code> elements in the form <code>[x1,x2,...,xn,y1,y2,...,yn]</code>.

Return the array in the form <code>[x1,y1,x2,y2,...,xn,yn]</code>.

&nbsp;
Example 1:

<pre>
Input: nums = [2,5,1,3,4,7], n = 3
Output: [2,3,5,4,1,7] 
Explanation: Since x1=2, x2=5, x3=1, y1=3, y2=4, y3=7 then the answer is [2,3,5,4,1,7].
</pre>

Example 2:

<pre>
Input: nums = [1,2,3,4,4,3,2,1], n = 4
Output: [1,4,2,3,3,2,4,1]
</pre>

Example 3:

<pre>
Input: nums = [1,1,2,2], n = 2
Output: [1,2,1,2]
</pre>

&nbsp;
Constraints:

<ul>
	<li><code>1 &lt;= n &lt;= 500</code></li>
	<li><code>nums.length == 2n</code></li>
	<li><code>1 &lt;= nums[i] &lt;= 10^3</code></li>
</ul>

shuffle

Shuffle the Array

Array

给你一个数组 <code>nums</code> ，数组中有 <code>2n</code> 个元素，按 <code>[x1,x2,...,xn,y1,y2,...,yn]</code> 的格式排列。

请你将数组按 <code>[x1,y1,x2,y2,...,xn,yn]</code> 格式重新排列，返回重排后的数组。

&nbsp;

示例 1：

<pre>输入：nums = [2,5,1,3,4,7], n = 3
输出：[2,3,5,4,1,7] 
解释：由于 x1=2, x2=5, x3=1, y1=3, y2=4, y3=7 ，所以答案为 [2,3,5,4,1,7]
</pre>

示例 2：

<pre>输入：nums = [1,2,3,4,4,3,2,1], n = 4
输出：[1,4,2,3,3,2,4,1]
</pre>

示例 3：

<pre>输入：nums = [1,1,2,2], n = 2
输出：[1,2,1,2]
</pre>

&nbsp;

提示：

<ul>
	<li><code>1 &lt;= n &lt;= 500</code></li>
	<li><code>nums.length == 2n</code></li>
	<li><code>1 &lt;= nums[i] &lt;= 10^3</code></li>
</ul>