Longest Substring Without Repeating Characters - LeetCode
Longest Substring Without Repeating Characters - LeetCode
Feb 24, 2023
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Govind Pothuraju on Instagram: "👉 Comment “CODE” if you want solutions in C++, Java & Python Day 32/200: LeetCode 3 — Longest Substring Without Repeating Characters 💡 Given a string s, find the length of the longest substring without repeating characters. ✅ Brute Force: Check all substrings → O(n²) ❌ ✅ Optimal (Sliding Window + HashSet): O(n) ✅ Approach: Use two pointers (left, right) and a HashSet Expand right while characters are unique If duplicate found → remove from set and move left Trac
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