Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.Calling next() will return the next smallest number in the BST.Note: next() and hasNext() sho
class BSTIterator { Queue<Integer> queue = new LinkedList<>(); public BSTIterator(TreeNode root) { inorderTraversal(root); } private void inorderTraversal(TreeNode root) { if (root == null) { return; } inorderTraversal(root.left); queue.offer(root.val); inorderTraversal(root.right);...
Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.Calling next() will return the next smallest number in the BST.Note: next() and hasNext() should run in average O(1) time and uses O(h) memory, where h is the ...
* Definition for a binary tree node. * type TreeNode struct { * Val int * Left *TreeNode * Right *TreeNode * } */ // 黄哥Python培训 黄哥所写 type BSTIterator struct { nodes []int index int } func Constructor(root *TreeNode) BSTIterator { if root == nil { return BSTIterator{...
Can you solve this real interview question? Binary Search Tree Iterator - Implement the BSTIterator class that represents an iterator over the in-order traversal [https://en.wikipedia.org/wiki/Tree_traversal#In-order_(LNR)] of a binary search tree (BST):
简介:Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST. Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST. ...
Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST. Calling next() will return the next smallest number in the BST. Note: next() and hasNext() should run in average O(1) ti...
class BSTIterator { public: stack<TreeNode *> ss; // 初始化时,栈里保存从根节点到最左边叶子的节点,栈顶是整颗树的最小值 //从根向左遍历 最小值在栈顶 BSTIterator(TreeNode *root) { while(!ss.empty()) { ss.pop(); } while(root) ...
Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST. 调用next()将返回二叉搜索树中的下一个最小的数。 Callingnext()will return the next smallest number in the BST.
Suppose you are given the root node Node root; of a binary tree. How would you write an iterator for the tree? (Note that each node node has two attributes: node.left and node.right, the left and right children of the node, respectively.) Sep...