Remove Duplicates from Sorted Array In-Place

Given an integer array `nums` sorted in non-decreasing order, remove duplicates in-place such that each unique element appears only once. Return the number of unique elements `k`. ### Constraints - `1 <= nums.length <= 10^5` - `-100 <= nums[i] <= 100` - `nums` is sorted in non-decreasing order. ### Input Format A single line of space-separated integers representing `nums`. ### Output Format Print space-separated integers representing the unique elements (the first `k` elements).