Node*prev;//实质是指向最后一个元素的指针Node* treeToDoublyList(Node*root) {if(root==NULL)returnNULL; Node*dummy=newNode(0,NULL,NULL); prev=dummy; inorder(root); prev->right = dummy->right; dummy->right->left =prev;returndummy->right; }voidinorder(Node *root){if(root==NULL)return...
You can think of the left and right pointers as synonymous to the predecessor and successor pointers in a doubly-linked list. For a circular doubly linked list, the predecessor of the first element is the last element, and the successor of the last element is the first element. We want to...
https://leetcode.com/problems/convert-sorted-list-to-binary-search-tree/ 题目: Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 思路: 简单起见,先把链表值存到数组中,用数组递归感觉会简单点。。 算法: public int getListLength(ListNod...
You can think of the left and right pointers as synonymous to the predecessor and successor pointers in a doubly-linked list. For a circular doubly linked list, the predecessor of the first element is the last element, and the successor of the last element is the first element. We want to...
leetcode-222-Counter Complete Binary Tree Nodes - binary search 2 0 10:00 App leetcode-852. Peak Index in a Mountain Array -binary-search 94 0 10:30 App leetcode-1973-Count Nodes Equal to Sum of Descendants - Recursion 3 0 15:08 App leetcode-111. Minimum Depth of Binary Tree -...
If you don’t know this, I suggest you take a look at this article https://lucifer.ren/blog/2020/12/21/shuati-silu3/ In addition, my brushing plug-in leetcode-cheatsheet also gives the time complexity Quick reference sheet for your reference. ...
[LeetCode]114.Flatten Binary Tree to Linked List 【题目】 Given a binary tree, flatten it to a linked list in-place. For example, Given The flattened tree should look like: 【分析】 在先序遍历的过程中把二叉树转为链表。 用pre记住当前节点的前一节点。节点的右指针作为链表指针,同时左指针...
Convert Sorted List to Binary Search Tree Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 解题思路: 题意为构造有序链表的二分查找树。找到中间节点的办法用双指针法。注意我们还须要保存中间节点的前一个节点,便于一个链表分成两个链表。
704. Binary Search # 题目 # Given a sorted (in ascending order) integer array nums of n elements and a target value, write a function to search target in nums. If target exists, then return its index, otherwise return -1. Example 1: Input: nums = [-1,0
Can you solve this real interview question? Convert Sorted List to Binary Search Tree - Given the head of a singly linked list where elements are sorted in ascending order, convert it to a height-balanced binary search tree. Example 1: [https://asse