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Data structure questions with story like explanation.

Array
  1. Remove Duplicates in-place from Sorted Array
  2. Left Rotate the Array by One
  3. Union of Two Sorted Arrays
  4. Second Largest element
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Binary Search
  1. Binary Search
  2. First and last occurrences of x
  3. Search insert position of K in a sorted array
  4. Find the closest number
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Window Slide
  1. First negative integer in every window of size k
  2. Max Sum Subarray of size K
  3. Longest K unique characters substring
  4. Occurences of Anagrams
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