6d ago · 13 min read · Binary search is one of the most elegant and efficient algorithms, yet it hides many traps. Off-by-one errors, infinite loops, and confusing mid calculations trip up even experienced developers. Once
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May 28 · 5 min read · You can write recursive inorder in your sleep. Three lines and a base case. Then an interviewer asks for the iterative version, and the clean recursion you leaned on becomes a puzzle about when to pus
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May 25 · 10 min read · You sort LeetCode's tree tag by frequency, pick the top forty, and start grinding. Three weeks in, tree problems still feel unpredictable. The recursive ones blur together. Level order problems feel l
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