Leetcode #3: Longest Substring With Repeating Characters
Автор: The Recursive Path
Загружено: 2026-02-09
Просмотров: 37
Описание:
Master the Sliding Window technique with LeetCode #3! 🚀
Question link :- https://leetcode.com/problems/longest...
The "Longest Substring Without Repeating Characters" problem is a classic software engineering interview question. In this video, we move beyond the brute-force approach to implement a highly optimized solution in Java.
🔍 What We’ll Solve:
Given a string s, find the length of the longest substring without repeating characters.
🛠️ Key Concepts Covered:
Brute Force: Why checking every substring is O(n^3) and how it fails.
The Sliding Window (Basic): Using a HashSet to manage a moving window of unique characters (O(n)).
Optimized Sliding Window: Using a HashMap to store character indices and "jump" the left pointer for maximum efficiency.
Complexity Analysis: Why time is O(n) and space is O(min(n, m)).
Repository link :- https://github.com/TheRecursivePath/L...
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