Search⌘ K
AI Features

Solution: Find Longest Self-Contained Substring

Explore how to identify the longest self-contained substring within a given string using hash maps. Understand how to track each character's first and last occurrences and dynamically adjust window boundaries to validate substrings. This lesson helps you apply optimal hash map techniques for substring analysis while ensuring efficient time and space complexity.

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 ...