This will help you solve 90% of all DSA problems in interviews (based on my experience over the last 5 years) ◄ Array / String Inputs 1. Is the array sorted? → Use Binary Search, Two Pointers, or Prefix Sums 2. Optimization problems (Max/Min/Subarray)? → Think Sliding Window, Dynamic Programming, or Greedy 3. Looking for duplicates / counts / frequencies? → Use HashMap, HashSet, or Counting Array 4. Need substrings or fixed-size subarrays? → Apply Sliding Window with Two Pointers 5. Frequent min
0:06
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