leetcode/1019_squares-of-a-sorted-array/README.md

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Given an integer array `nums` sorted in **non-decreasing** order, return _an array of **the squares of each number** sorted in non-decreasing order_.
**Example 1:**
Input: nums = [-4,-1,0,3,10]
Output: [0,1,9,16,100]
Explanation: After squaring, the array becomes [16,1,0,9,100].
After sorting, it becomes [0,1,9,16,100].
**Example 2:**
Input: nums = [-7,-3,2,3,11]
Output: [4,9,9,49,121]
**Constraints:**
* `1 <= nums.length <= 104`
* `-104 <= nums[i] <= 104`
* `nums` is sorted in **non-decreasing** order.
**Follow up:** Squaring each element and sorting the new array is very trivial, could you find an `O(n)` solution using a different approach?