Finding subarrays or substrings (e.g., "Longest substring without repeating characters").
Always identify the "Brute Force" solution first. Even if it’s inefficient, it guarantees a baseline for correctness and helps you see where the bottlenecks are. Problem Solving in Data Structures & Algorithms...
Look for redundant work. Are you recalculating the same value? (Use Dynamic Programming ). Are you searching linearly? (Use Binary Search or a Hash Map ). 2. The Mental Toolkit (Pattern Recognition) Finding subarrays or substrings (e
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