[LeetCode] 173. Binary Search Tree Iterator Java 题目: 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 ...
我理解的数据结构(五)—— 二分搜索树(Binary Search Tree) 一、二叉树 和链表一样,动态数据结构 具有唯一根节点 每个节点最多有两个子节点 每个节点最多有一个父节点 具有天然的递归结构 每个节点的左子树也是二叉树 每个节点的右子树也是二叉树 一个节点或者空也是二叉树 二、二分搜索树 是二叉树 每个节点...
Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST. Callingnext()will return the next smallest number in the BST. Note:next()andhasNext()should run in average O(1) time and uses O(h) memory, wherehis the height of t...
// 查找节点的方法booleansearch(intkey){returnsearchRec(root,key);// 从根节点开始递归查找}// 递归查找的辅助函数booleansearchRec(Noderoot,intkey){// 基本情况:如果当前节点为空,返回falseif(root==null){returnfalse;}// 如果找到了关键字,返回trueif(key==root.key){returntrue;}// 根据BST特性继续...
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Given the root node of a binary search tree (BST) and a value. You need to find the node ...
Given a root of Binary Search Tree with unique value for each node. Remove the node with given value. If there is no such a node with given value in the binary search tree, do nothing. You should keep the tree still a binary search tree after removal. ...
Deletion Operation There are three cases for deleting a node from a binary search tree. Case I In the first case, the node to be deleted is the leaf node. In such a case, simply delete the node from the tree. 4 is to be deleted ...
228 changes: 114 additions & 114 deletions 228 Tree.java Original file line numberDiff line numberDiff line change @@ -16,21 +16,21 @@ public static void main(String[] args) { tree.inorder(); } public boolean insert(int val) { if (root == null) { root = new Node(val); retu...
228 changes: 114 additions & 114 deletions228Tree.java Original file line numberDiff line numberDiff line change Expand Up@@ -16,21 +16,21 @@ public static void main(String[] args) { tree.inorder(); } publicbooleaninsert(intval) { ...