mediumArrays
Unique Identifier Counter Solution
Problem Statement
You are given an array of integers `ids` where each integer represents a potential identifier. Your task is to determine the next available unique identifier. Implement a function `next_unique_id` that takes the array of `ids` as input and returns the smallest positive integer that is not present in the array.
Examples
Example 1:
Input:[1,2,3]
Output:4
Example 2:
Input:[1,2,4]
Output:3
Example 3:
Input:[-1,-2,0]
Output:1
Time: O(N) Space: O(1)
Analyze constraints and compute optimal solutions step-by-step.
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