"The journey of a thousand problems begins with a single solution." ...
🔥 This is a perfect “pre-flight checklist” before diving into advanced algorithms. HashMaps, recursion, DFS/BFS, binary search, sliding window, heaps — master these, and a lot of interview problems ...
Sliding Window Use it when dealing with contiguous subarrays or subsegments. Examples: LC 76, LC 209, LC 424, LC 567, LC 904 🔹 2. Two Pointers Use it when searching pairs in a sorted array or ...
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