Validate Binary Search Tree - Leetcode 98

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Validate Binary Search Tree - Leetcode 98
  1. Greg Hogg
  2. leetcode
  3. coding interview question
  4. data structures
  5. data structures and algorithms
  6. backtracking
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Комментарии
Автор

Master trees, BSTs, and all data structures and algos for FREE at Algomap.io :)

GregHogg
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Man I’ve been studying for months and thought I was making progress until I found your shorts 😅 I’m not even close to interview ready.

griffinulsh
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One other solution is, If you do inorder traversal on binary search tree and if it is valid tree. You will get the result in sorted order.

So apply inorder traversal, keep track of last found element, if new element is less than the previous it means, this is not valid BST.

LearnwithChampzz-rvlk
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What happens if you have duplicate values? This should not be possible in a BST. I was stuck today with that possibility
Is the line of <= or >= that check this?
Thanks!

diego
Автор

You flashed the solution quick but it looks like you’re doing a bfs?

rdubb