README ¶ 94. Binary Tree Inorder Traversal [中等] 栈 树 哈希表 给定一个二叉树的根节点 root ,返回它的 中序 遍历。 示例 1: 输入:root = [1,null,2,3] 输出:[1,3,2] 示例 2: 输入:root = [] 输出:[] 示例 3: 输入:root = [1] 输出:[1] 示例 4: 输入:root = [1,2] 输出:[2,1] 示例 5: 输入:root = [1,null,2] 输出:[1,2] 提示: 树中节点数目在范围 [0, 100] 内 -100 <= Node.val <= 100 进阶: 递归算法很简单,你可以通过迭代算法完成吗? Expand ▾ Collapse ▴ Documentation ¶ Index ¶ type TreeNode Constants ¶ This section is empty. Variables ¶ This section is empty. Functions ¶ This section is empty. Types ¶ type TreeNode ¶ type TreeNode struct { Val int Left *TreeNode Right *TreeNode } Source Files ¶ View all Source files solution.go Click to show internal directories. Click to hide internal directories.