🔒 Preview mode. The first 15 Foundations lessons are free; this one is Pro. Start a 7-day trial to unlock the editor, AI hints and the rest of the curriculum. Card required, cancel any time in Dashboard.Start 7-day trial →
← Courses›Interview Prep›Module 5 · System Design & Behavioral›Longest palindromic substring (expand around center)write75 / 104
+125 XP
Task
📝 **Task:** Implement `longest_palindrome(s)`. If multiple are tied, return any.
📋 Implement the function above. Test cases run automatically.
💡 **Hint:** Re-read the theory if you get stuck — the pattern is right there.
✏️ Write your code here
🐍
Loading Python...
One-time download (~1 MB). Then it runs instantly.