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();st.pop();p=top->right;}}returnresult;}...
* int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * };*/classSolution {public: vector<int> inorderTraversal(TreeNode*root) { vector<int>ret;if( !root )returnret; stack<TreeNode*>sta; sta.push(root);while( !sta.empty...
*/voidtraversal(structTreeNode*root,int*countPointer,int*res){if(!root)return;traversal(root->left,countPointer,res);res[(*countPointer)++]=root->val;traversal(root->right,countPointer,res);}int*inorderTraversal(structTreeNode*root,int*returnSize){int*res=malloc(sizeof(int)*110);intcount=0...
}/*** 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(this.rightSubNode !=null) {this.rightSubNode.p...
https://leetcode.com/problems/binary-tree-inorder-traversal/ 2. 分析 2.1 迭代法 class Solution { public: vector<int> inorderTraversal(TreeNode* root) { vector<int> ans; stack<TreeNode*> todo;//定义一个栈,先入后出 ...
In a postorder traversal of the vertices of T, we visit the vertices of T1 in postorder, then the vertices of T2 in postorder and finally we visit r. Now you are given the preorder sequence and inorder sequence of a certain binary tree. Try to find out its postorder sequence. ...
.cwiki.us/display/ITCLASSIFICATION/Binary+Tree+Level+Order+Traversal">https://www.cwiki.us/display/ITCLASSIFICATION/Binary+Tree+Level+Order+Traversal* @seehttps://www.lintcode.com/problem/binary-tree-level-order-traversal* * ** @author YuCheng**/publicclassLintCode0069LevelOrderTest{privatefinal...
Leetcode 94 binary tree inorder traversal 思路是从根节点开始,先将根节点压入栈,然后再将其所有左子结点压入栈,然后取出栈顶节点,保存节点值,再将当前指针移到其右子节点上,若存在右子节点,则在下次循环时又可将其所有左子结点压入栈中。这样就保证了访问顺序为左-根-右。
Algorithm inorder(t) /*t is a binary tree. Each node of t has three fields: lchild, data, and rchild.*/ { If t! =0 then { Inorder(t->lchild); Visit(t); Inorder(t->rchild); } } Example: Let us consider a given binary tree.Therefore the inorder traversal of above tree ...
A tree is composed of a collection of nodes, where each node has some associated data and a set of children. A node's children are those nodes that appear immediately beneath the node itself. A node's parent is the node immediately above it. A tree's root is the single node that ...