Remove Duplicates from Sorted Array
Explore the two pointers method to remove duplicates from a sorted array in-place. Understand how to keep unique elements in their original order and return the count of unique values without using extra space. This lesson helps you implement an efficient solution valuable for coding interviews.
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Statement
You are given an integer array nums that is already sorted in non-decreasing order. Your task is to remove the duplicate values in-place so that each element in the array appears only once, while preserving the original relative order of the elements.
After removing the duplicates, let k be the number of unique elements remaining in the array. The first k positions of nums should contain these unique elements in sorted order. Any values beyond index k - 1 are irrelevant and can be ignored.
Your goal is to modify the array in-place and return the value k, representing the count of unique elements.
Constraints:
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