代码如下: 1classSolution {2publicTreeNode deleteNode(TreeNode root,intkey) {3if( root ==null)returnnull;4returnhelper(root,key);5}67privateTreeNode helper(TreeNode node,intkey) {8if( node ==null)returnnull;9if( node.left ==null&& node.right ==null&& node.val ==key) {10node =nul...
* TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {} * };*/classSolution {public: TreeNode* deleteNode(TreeNode* root,intkey) {//递归 检索由于是bst 二叉树 根据其特性可以快速查找对应的节点if(root==nullptr)returnnullptr;if(root->val<key){ roo...
1 <= Node.val <= 10 ^ 5 样例 思路:快慢指针/双指针 本题是 LeetCode 876 - 链表的中间结点 和LeetCode 203 - 移除链表元素 的加强版,数据范围加大,并需要删除中间结点。 对于链表的题目,一般都可以使用一个哨兵结点。 本题使用哨兵结点,方便处理删除头结点这种边界情况。 因为本题需要删除中间结点,所以...
Given a root node reference of a BST and a key, delete the node with the given key in the BST. Return the root node reference (possibly updated) of the BST. Basically, the deletion can be divided into two stages: Search for a node to remove. If the node is found, delete the node...
Delete the given node. Note that by deleting the node, we do not mean removing it from memory. We mean: The value of the given node should not exist in the linked list. The number of nodes in the linked list should decrease by one. ...
If the node is found, delete the node. Note: Time complexity should be O(height of tree). Example: root = [5,3,6,2,4,null,7] key = 3 5 / \ 3 6 / \ \ 2 4 7 Given key to delete is 3. So we find the node with value 3 and delete it. ...
If the node is found, delete the node. Note: Time complexity should be O(height of tree). Example: root= [5,3,6,2,4,null,7] key= 3 5 /\3 6 /\ \2 4 7Given key to delete is3. So we find the node with value 3and delete it. ...
If the node is found, delete the node. Note: Time complexity should be O(height of tree). Example: root = [5,3,6,2,4,null,7] key = 3 5 / \ 3 6 / \ \ 2 4 7 Given key to delete is 3. So we find the node with value 3 and delete it. ...
Can you solve this real interview question? Delete Node in a Linked List - There is a singly-linked list head and we want to delete a node node in it. You are given the node to be deleted node. You will not be given access to the first node of head. Al
Explore - LeetCodeleetcode.com/explore/interview/card/top-interview-questions-easy/93/linked-list/553/ Solutions: This problem introduces a very interesting way to delete a node in the singly linked list. Usually, we use need to go to the previous node and let it point to the next nex...