Remove Duplicates from Sorted Array

Given a sorted array, remove duplicates in-place so each unique element appears once. Print the count of unique elements followed by the deduplicated prefix, space-separated.

Example

Input: 0 0 1 1 1 2 2 3 3 4 Output: 5 0 1 2 3 4

Approach

A slow pointer tracks the last confirmed-unique position; a fast pointer scans ahead. Whenever a new distinct value is found, advance the slow pointer and write it there.