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Solution: Find Longest Self-Contained Substring

Understand how to identify the longest self-contained substring within a string by using hash maps to track character positions and expanding windows to validate substrings. This lesson helps you apply efficient algorithms to solve substring problems, enhancing your coding interview problem-solving skills.

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 ...