sort-array-by-parity-ii

Sort Array By Parity II

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sortArrayByParityII

Given an array of integers <code>nums</code>, half of the integers in <code>nums</code> are odd, and the other half are even.

Sort the array so that whenever <code>nums[i]</code> is odd, <code>i</code> is odd, and whenever <code>nums[i]</code> is even, <code>i</code> is even.

Return any answer array that satisfies this condition.

&nbsp;
Example 1:

<pre>
Input: nums = [4,2,5,7]
Output: [4,5,2,7]
Explanation: [4,7,2,5], [2,5,4,7], [2,7,4,5] would also have been accepted.
</pre>

Example 2:

<pre>
Input: nums = [2,3]
Output: [2,3]
</pre>

&nbsp;
Constraints:

<ul>
	<li><code>2 &lt;= nums.length &lt;= 2 * 104</code></li>
	<li><code>nums.length</code> is even.</li>
	<li>Half of the integers in <code>nums</code> are even.</li>
	<li><code>0 &lt;= nums[i] &lt;= 1000</code></li>
</ul>

&nbsp;
Follow Up: Could you solve it in-place?

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