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Grokking the Coding Interview Patterns in Go

Solution: Find Longest Self-Contained Substring

Explore a method to find the longest self-contained substring within a given string by using hash maps to track character occurrences. Understand how to expand and validate substrings to ensure all characters are unique to that window while applying efficient string processing techniques.

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Statement

You are given a string, s, consisting of lowercase English letters. Your task is to find the length of the longest self-contained substring of s.

A substring t of s is called self-contained if:

  • t is not equal to the entire string s.

  • Every character in t does not appear anywhere else in s ...