Update 0104-maximum-depth-of-binary-tree.cpp

[vpsh98]

added more solutions - recursive dfs, dfs stack inorder, dfs stack preorder, bfs queue level order.

• File(s) Modified: 0104-maximum-depth-of-binary-tree.cpp
• Language(s) Used: cpp
• Submission URL: https://leetcode.com/problems/maximum-depth-of-binary-tree/submissions/1208901422

Important

Please make sure the file name is lowercase and a duplicate file does not already exist before merging.