Validate Binary Search Tree - LeetCode 98 - Coding Interview Questions

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Validate Binary Search Tree - Depth First Search - LeetCode 98

In this Video i will show you how to solve the problem Validate Binary Search Tree using depth first search technique.
This question is asked a lot during coding interviews for big companies like google, uber...

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#codinginterview #leetcodesolution #leetcode

Intro : (0:00)
What is Binary Search Tree ? : (0:10)
Visualization For the Solution : (0:21)
Code Explanation : (2:29)
Complexity Analysis : (3:38)
  1. One Code Man
  2. validate binary search tree
  3. binary search tree leetcode
  4. 98. validate binary search tree
  5. validate binary search tree leetcode
  6. leetcode 98
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Hello, can you explain why we check if root <= prevN? you said in the video that b/c stack uses LIFO(last in first out) that we can use that to our advantage by checking for root <= prevN. Sorry Im very new to this so I'm trying too understand the reason behind every step

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