0559. Maximum Depth of N-ary Tree

https://leetcode.com/problems/maximum-depth-of-n-ary-tree

Description

Given a n-ary tree, find its maximum depth.

The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node.

Nary-Tree input serialization is represented in their level order traversal, each group of children is separated by the null value (See examples).

Example 1:

**Input:** root = [1,null,3,2,4,null,5,6]
**Output:** 3

Example 2:

**Input:** root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]
**Output:** 5

Constraints:

• The total number of nodes is in the range [0, 104].

• The depth of the n-ary tree is less than or equal to 1000.

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