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Grokking the Coding Interview Patterns in C#

Solution: First Unique Character in a String

Explore how to find the first unique character in a string by tracking character occurrences with a hash map in C#. Learn the step-by-step approach and understand the time and space complexity for efficient coding solutions.

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Statement

For a given string of characters, s, your task is to find the first non-repeating character and return its index. Return −1-1 if there’s no unique character in the given string.

Constraints:

  • Only lowercase english letters are accepted.
  • There are no spaces in
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