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LeetCode 5: Longest Palindromic Substring | Visualized Step-by-Step 🧠✨
How do you find the longest palindrome in a string efficiently?Instead of checking every single substring ($O(n^3)$), we use the "Expand Around Center" approach! By treating each character (and the space between them) as a center, we expand outward to find matching characters. This reduces the time complexity to a clean $O(n^2)$!Watch the ...
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