Solve problems with JavaScript
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Recursion
Recursion
Keep subtracting
If timebox exceeded, read other solutions
Inorder traversal
Sum of max height of 2 subtrees
Explanation is hard
Modified version of "Maximum Depth of Binary Tree"
A Broken Interview: The Origin
Traverse in-order and validate the traversed result
BFS with level
"You know you don't get bonus points for squishing all your code into the least number of lines" - someone
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