Master the steps to efficiently track data, solve permutations, anagrams, and game design problems.

Central CIP Path

Knowing What to Track

# Statement

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

**Constraints:**

* $1 \leq$ `s.length` $\leq 10^{3}$

* Only lowercase English letters are accepted.
* There are no spaces in the string.

Let's solve the First Unique Character in a String problem using the Knowing What to Track pattern.

Solution: First Unique Character in a String

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Solution: First Unique Character in a String

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