Given a binary tree, return thepreordertraversal of its nodes values. Example: Follow up:Recursive solution is trivial, could you do it iteratively 一般我們提到樹的遍歷，最常見的有先序遍歷，中序遍歷，后序遍歷和層序遍歷，它們用遞歸實現起來都非常的簡單 ...
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Given preorder and inorder traversal of a tree, construct the binary tree. Note:You may assume that duplicates do not exist in the tree ...
Return any binary tree that matches the given preorder and postorder traversals. Values in the traversals pre and post are distinct positive ...
Given a binary tree with N nodes, each node has a different value from {1, ..., N}. A node in this binary tree can be flipped by swapping the left ...
We run a preorder depth first search on the `root`of a binary tree. At each node in this traversal, we output D dashes (where D is the depth ...
One way to serialize a binary tree is to use pre-order traversal. When we encounter a non-null node, we record the node's value. If it is a null ...
. 這道題要求從中序和后序遍歷的結果來重建原二叉樹，我們知道中序的遍歷順序是左-根-右，后序的順序是左-右- ...
it iteratively? 二叉樹的中序遍歷順序為左-根-右，可以有遞歸和非遞歸來解，其中非遞歸解法又 ...
Given a binary tree, return the inorder traversal of its nodes' values. For example:Given binary tree {1,#,2,3}, return [1,3,2]. Note ...
