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Grokking the Coding Interview Patterns in Go

Solution: Remove Duplicates from Sorted Array

Discover how to use the two pointer technique to remove duplicates from a sorted array in-place. This lesson guides you through maintaining unique elements in order, optimizing for time and space efficiency with O(n) time and O(1) space complexity.

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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 ...