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= Inorder DFS
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This is the order in which a <binary search tree> should be traversed for ordered output, i.e.:
* everything to the left is smaller than parent
* everything to the right is larger than parent

This ordering makes sense for <binary trees> and not <k-ary trees> in general because if there are more than two nodes it is not clear what the top node should go in the middle of.

This is unlike <pre-order depth-first search> and <post-order depth-first search> which generalize obviously to general trees.


In order depth first search

ID: in-order-depth-first-search