2、postorder + inorder 1/**2* Definition for binary tree3* struct TreeNode {4* int val;5* TreeNode *left;6* TreeNode *right;7* TreeNode(int x) : val(x), left(NULL), right(NULL) {}8* };9*/10classSolution {11public:12typedef vector<int>::iterator Iter;1314TreeNode *build(...
更为简洁非递归解法 具体程序如下: 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(...
" Preorder traversal:the elements in the tree are"); preorder(root); printf("Postorder traversal:the elements in the tree are"); postorder(root); return 0;}void insert(struct tnode ** tree,int num){ struct tnode *temp = NULL;
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...
3#145. Binary Tree Postorder Traversal Given a binary tree, return the postorder traversal of its nodes' values. Note: Recursive solution is trivial, could you do it iteratively? postorder: left, right, root Recursive version:/** * Definition for a binary tree node. ...
然后就是, preorder 与 inorder 的范围不是一致的,必须要分开传入子函数,否则一定会错。 通过postorder 与 inorder 来重构树,也是一个道理。上次做这道题目虽然很轻松地过了,但是一定是瞎猫碰到死耗子,蒙混过关。刚刚说的那些错误点,在这个类型里面同样存在!
同Construct Binary Tree from Inorder and Postorder Traversal(Python版) # Definition for a binary tree node. # class TreeNode: # def __init__(self, val=0, left=None, right=None): # self.val = val # self.left = left # self.right = right class Solution: def buildTree(self, pre...
顾名思义,在深度优先的情况下,在访问下一个同级树之前,树向下(向深度)遍历,二叉树的PreOrder,InOrder和PostOrder遍历实际上是深度优先遍历。在广度优先上,树的整个宽度在移到下一个级别之前被遍历,因此它也被称为级别顺序遍历。还有其他遍历二叉树的算法,例如蒙特卡洛树搜索,它集中于分析最优的移动,但先序、后序...
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 ...
Binary tree traversal: Preorder, Inorder, and Postorder In order to illustrate few of the binary tree traversals, let us consider the below binary tree: Preorder traversal: To traverse a binary tree in Preorder, following operations are carried-out (i) Visit the root, (ii) Traverse the le...