Given the root of a binary tree, return its maximum depth. A binary tree's maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. Example: For a tree with root , left child , and right subtree [, , ], the max depth is . This is the simplest tree recursion problem.
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$ curl repovive.com/roadmaps/maang-interview-prep/trees-bst/problem-maximum-depth-of-binary-tree
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