872. Leaf-Similar Trees
872. Leaf-Similar Trees
# Definition for a binary tree node.
# class
Preorder Traversal
144. Binary Tree Preorder Traversal
144. Binary Tree Preorder Traversal
# Definition for a binary tree
255. Verify Preorder Sequence in Binary Search Tree
255. Verify Preorder Sequence in Binary Search Tree
遞迴（超時）
105. Construct Binary Tree from Preorder and Inorder Traversal
105. Construct Binary Tree from Preorder and Inorder Traversal
題目給出前序遍歷以及中序遍歷的順序，
589. N-ary Tree Preorder Traversal
589. N-ary Tree Preorder Traversal
"""
# Definition for