}/*** NLR:前序遍历(Preorder Traversal 亦称(先序遍历)) * 访问根结点的操作发生在遍历其左右子树之前。*/publicvoidpreOrderTraversal() {//NSystem.out.print(this);//Lif(this.leftSubNode !=null) {this.leftSubNode.preOrderTraversal(); }//Rif(thi
1. Preorder Tree Traversal 1//Solution 1. With Stack2//Time Complexity : O(n)3//Space Complexity: O(h) ~ O(log n)4publicclassSolution {5publicList<Integer>preorderTraversal(TreeNode root) {6ArrayList<Integer> list =newArrayList<Integer>();7if(root ==null)returnlist;89Stack<TreeNode...
2.2 last.right 不为 null,说明之前已经访问过,第二次来到这里,表明当前子树遍历完成,保存 cur 的值,更新 cur = cur.right public List<Integer> inorderTraversal3(TreeNode root) { List<Integer> ans = new ArrayList<>(); TreeNode cur = root; while (cur != null) { //情况 1 if (cur.left ...
This C Program Build Binary Tree if Inorder or Postorder Traversal as Input. Here is source code of the C Program to Build Binary Tree if Inorder or Postorder Traversal as Input. The C program is successfully compiled and run on a Linux system. The program output is also shown below. ...
publicList<Integer>inorderTraversal(TreeNoderoot){List<Integer>ans=newArrayList<>();Stack<TreeNode>stack=newStack<>();TreeNodecur=root;while(cur!=null||!stack.isEmpty()){//节点不为空一直压栈while(cur!=null){stack.push(cur);cur=cur.left;//考虑左子树}//节点为空,就出栈cur=stack.pop()...
1) Preorder traversal Totraverse a binary tree in preorder, following operations are carried out: Visit the root. Traverse the left sub tree of root. Traverse the right sub tree of root. Note:Preorder traversal is also known as NLR traversal. ...
If we are given a binary tree and we need to perform a vertical order traversal, that means we will be processing the nodes of the binary tree from left to right. Suppose we have a tree such as the one given below. If we traverse the tree in vertical order and print the nodes then...
binarytreetraversal.zipFl**末初 上传8.5 KB 文件格式 zip 二叉树遍历算法实现(Python) 点赞(0) 踩踩(0) 反馈 所需:1 积分 电信网络下载 Option_Trend 2025-04-02 00:00:16 积分:1 stock-ai-pc 2025-04-02 00:00:54 积分:1 DSPCourseDesign 2025-04-02 00:07:08 积分:1 anime-kawai-...
之前的版本太多,这里总结一下三种非递归遍历(C++) preorder classSolution{public:vector<int>preorderTraversal(TreeNode*root){vector<int>result;stack<TreeNode*>st;TreeNode*p=root;while(!st.empty()||p){if(p!=NULL){st.push(p);result.push_back(p->val);p=p->left;}else{TreeNode*top=st.top...
Given binary tree [3,9,20,null,null,15,7], 3 / \ 9 20 / \ 15 7 return its bottom-up level order traversal as: [[15,7],[9,20],[3]] 二叉树的层次遍历,不过需要保持每一层的数据,可以通过vector配合队列实现,实现: classSolution{public:vector<vector<int>>levelOrderBottom(TreeNode*root...