1vector<int> inorderTraversal(TreeNode*root) {2vector<int>rVec;3stack<TreeNode *>st;4TreeNode *tree =root;5while(tree || !st.empty())6{7if(tree)8{9st.push(tree);10tree = tree->left;11}12else13{14tree =st.top();15rVec.push_back(tree->val);16st.pop();17tree = tree->...
但是inorder不简单啊,模仿递归记录调用处然后处理完当前函数回来,下午困得不行闷头试了好几次各种bug超Memory,看了我是歌手回来发现脑子清醒了 1vector<int> inorderTraversal(TreeNode *root) {2vector<int>nodes;3if(root == NULL)returnnodes;4stack<TreeNode *>tStack;5TreeNode * cur =root;6while(!tS...
publicTreeNodebuildTree(int[]preorder,int[]inorder){HashMap<Integer,Integer>map=newHashMap<>();for(inti=0;i<inorder.length;i++){map.put(inorder[i],i);}returnbuildTreeHelper(preorder,0,preorder.length,inorder,0,inorder.length,map);}privateTreeNodebuildTreeHelper(int[]preorder,intp_st...
node_e.assignchild(node_h, node_i); 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"...
Given preorder and inorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. 思路 这道题目,翻译一下就是:如何根据先序和中序遍历的数组,来构造二叉树。其中Note部分说,假设不存在重复项。为什么这样说呢?因为如果存在重复项,那么构造出来...
left) printPreorder(root.right) # Driver code root = Node(1) root.left = Node(2) root.right = Node(3) root.left.left = Node(4) root.left.right = Node(5) print("Preorder traversal of binary tree is") printPreorder(root) print("\nInorder traversal of binary tree is") printIn...
order B. Traversing the forest corresponding to the binary tree in root-last order C. Traversing the forest corresponding to the binary tree in breadth-first order D. None of the above 答案：A 分析：正确答案:A 解析:前序遍历一个二叉树等价于按从树的根部、右子树、右子树查找顺序查找树。
INORDER AND PREORDER TRAVERSAL and DISPLAY OF EXISTING BINARY TREE IN COMPUTER MEMORYP K KumaresanJournal of Harmonized Research
15、课程:树(下).13、练习—Construct Binary Tree from Preorder and Inorder Traversal 1 -- 9:07 App 15、课程:树(下).3、练习—Floor and Ceiling 11 -- 12:45 App 13、课程:哈希表(下).10、作业讲解 3 -- 6:45 App 10、课程:堆栈和队列(上).10、练习—Min stack(一) 2 -- 6:07...
树的三种DFS遍历,是指按照根节点(自己)被访问的顺序 Pre-Order: 先访问根节点,再访问其左右子树。对每一个subtree,同样适用。 In-Order: 先访问其...