Inorder , Preorder and Postorder traversals我编写了一个C程序来输入二进制搜索树的元素,并显示其InOrder,PostOrder和PreOrder遍历。 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778...
通过构建表达式树,可以将中序(Inorder)或前缀(Infix)表达式转换为后序(PostOrder)和前序(PreOrder)表达式。 基础概念 中序表达式(Inorder Expression):通常是我们常见的数学表达式形式,例如 a + b * c。 前序表达式(PreOrder Expression):运算符位于其操作数...
前序Preorder: 先访问根节点,然后访问左子树,最后访问右子树。子树递归同理 中序Inorder: 先访问左子树,然后访问根节点,最后访问右子树. 后序Postorder:先访问左子树,然后访问右子树,最后访问根节点. class Node: def __init__(self, key): self.left = None self.right = None self.val = key def prin...
下面是一个示例代码,用于从inOrder和preOrder返回postOrder树: 代码语言:txt 复制 class TreeNode: def __init__(self, val=0, left=None, right=None): self.val = val self.left = left self.right = right def buildTree(inOrder, preOrder): if not inOrder or not preOrder: return None # 根...
Preorder, Inorder, and Postorder Iteratively Summarization[1] 1.Pre Order Traverse 1publicList<Integer>preorderTraversal(TreeNode root) {2List<Integer> result =newArrayList<>();3Deque<TreeNode> stack =newArrayDeque<>();4TreeNode p =root;5while(!stack.isEmpty() || p !=null) {6if(p !
Conclusion I hope that you now have a clear understanding of the differences between inorder, preorder, and postorder traversal in JavaScript. With the knowledge and examples provided, you are now equipped to apply these techniques to your own tasks and projects effectively.L...
preorder_visit(node_a);//先序 Console.WriteLine(); inorder_visit(node_a);//中序 Console.WriteLine(); postorder_visit(node_a);//后序 Console.WriteLine(); node node_1 =newnode("1"); node node_2 =newnode("2"); node node_3 =newnode("3"); ...
(b) Preorder (Node, Left, Right) NLR (c) Postorder (Left, Right, Node) LRN 我个人喜欢给Root叫Node, 方便记忆 代码 void printPostorder(Node node) { if (node == null) return; // first recur on left subtree printPostorder(node.left); // then recur on right subtree printPostorder(node...
Pre: node 先, Inorder: node in, Postorder: node 最后 Recursive method 实际上代码是一样, 就是把ans.append(root.val) 放在如上表先, 中, 后就是pre, in, post order了. 1) PreOrder traversal ans =[]defpreOrder(self, root):ifnotroot:returnans.append(root.val)preOrder(root.left) ...
preorder: root-left-right inorder: left-root-right postorder: left-right-root order指的是root的位置。 recursive算法比较简单,iterative算法比较难想,可是leetcode原题都说了: recursive method is trivial, could you do iteration? 144.Binary Tree Preorder Traversal ...