2D Prefix Sum Interview Pattern | 304 Range Sum Query 2D | CodingWithBharat

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We have landed on to our 3rd Important Coding Interview Pattern which is 2D Range Query and 2D Prefix Sum.

00:00-03:08 Problem and Brute Force
03:09-05:00 1D Prefix Sum Idea
05:01-10:37 2D Prefix Sum Idea
10:38-14:37 Answering Queries in O(1)
14:38-20:03 Code
  1. Bharat Khanna
  2. codingwithbharat
  3. range sum query
  4. range sum query 2d - immutable
  5. range sum query 2d
  6. range sum query 2d immutable
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