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。[cc lang=c]#include...
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.right) preOrder(root)returnans 2) Inorder traversal Worst S: O...
*/classSolution{public List<Integer>preorderTraversal(TreeNode root){List<Integer>result=newLinkedList<>();TreeNode current=root;TreeNode prev=null;while(current!=null){if(current.left==null){result.add(current.val);current=current.right;}else{// has left, then find the rightmost of left su...
1vector<int> preorderTraversal(TreeNode*root) {2vector<int>rVec;3if(!root)4returnrVec;56stack<TreeNode *>st;7st.push(root);8while(!st.empty())9{10TreeNode *tree =st.top();11rVec.push_back(tree->val);12st.pop();13if(tree->right)14st.push(tree->right);15if(tree->left)1...
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. classNode:def__init__(self,key):self.left=Noneself.right=Noneself.val=keydefprintInorder(root):ifroot...
3. Binary Tree Traversal In Java Here is the complete example for the binary search tree traversal (In order, Preorder and Postorder) in Java. package com.javadevjournal.datastructure.tree.bst; public class BinarySearchTree { private Node root; ...
The program creates a binary tree for breadth-first traversal.But i'm trying to use Pre-Order, In-Order, Post-Order Traversal and actually i can't do that. The output of the program is not what i expected. I think i should change the preorder, inorder or postorder functions but i ...
Is there a way to print out numbers for pre-order, post-order and in-order traversals of trees using just recursion and a number. The trees are binary and n is the number of nodes from the parent to al children. Can anyone help me write the function to print the...
postorder: we need to make sure all the children nodes for the current node has been visited before we visit current node, and the left subtree is visited before right subtree. preorder: classSolution{voidpushLeft(TreeNode*root,stack<TreeNode*>&nodes,vector<int>&res){// this function here...
preOrder(root.left) preOrder(root.right) def postOrder(root): if root: postOrder(root.left) postOrder(root.right) print (root.data) #making the tree root = Node(1) root.left = Node(2) root.right = Node(3) root.left.left = Node(4) ...