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Kth Unique Character in a String

Problem
Examples
Example 1
Example 2
Example 3
Solution
Method 1 – Brute Force
Intuition
Approach
Complexity
Method 2 – Hash Map (O(n) time, two traversals)
Intuition
Approach
Complexity
Method 3 – One Traversal with Index Array (O(n) time, O(1) space)
Intuition
Approach
Code
Complexity

Similar Problems

First Unique Character in a StringEasy

Related Tags

duplicates-algo kth non-duplicated-algo

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First Unique Character in a StringEasy

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