Solution: First Unique Character in a String

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

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:

  • 11 \leq s.length 1 ...

Level up your interview prep. Join Educative to access 70+ hands-on prep courses.