LeetCode 109. Convert Sorted List to Binary Search Tree Description Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtr...
Leetcode Convert Sorted List to BST Bottom-up 较难的题目1. 和 google code jam 分数那题差不多, 需要用到 &1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 TreeNode* buildTree(ListNode* &head, int st, int ed) {...
1、题目描述 2、题目描述 使用快慢指针寻找链表中间值。 3、代码 1TreeNode* sortedListToBST(ListNode*head) {2if(head ==NULL)3returnNULL;45ListNode *mid =findmid(head);67TreeNode *node =newTreeNode(mid->val);89if(head ==mid)10returnnode;1112node->left =sortedListToBST(head);13node->ri...
Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. /** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val(x), next(NULL) {} * };*//** * Definition for binar...
LeetCode: 109. Convert Sorted List to Binary Search Tree 题目描述 Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtr...
Given an integer arraynumswhere the elements are sorted inascending order, convertit to aheight-balancedbinary search tree. Example 1: Input:nums = [-10,-3,0,5,9]Output:[0,-3,9,-10,null,5]Explanation:[0,-10,5,null,-3,null,9] is also accepted: ...
publicTreeNodesortedListToBST(ListNode head){if(head==null)returnnull;ListNode tail=head;while(tail.next!=null)tail=tail.next;returnform(head,tail);}publicTreeNodeform(ListNode head,ListNode tail){if(head==tail)returnnewTreeNode(head.val);ListNode pre=null;ListNode slow=head;ListNode fast=head...
classSolution{public:TreeNode*sortedListToBST(ListNode*head){returncreate(head,NULL);}TreeNode*create(ListNode*head,ListNode*tail){if(head==tail)returnNULL;ListNode*slow=head,*fast=head;while(fast!=tail&&fast->next!=tail)slow=slow->next,fast=fast->next->next;TreeNode*root=newTreeNode(slow-...
LeetCode—109. Convert Sorted List to Binary Search Tree 题目 https://leetcode.com/problems/convert-sorted-list-to-binary-search-tree/description/ 给出一个递增的链表,将其转化成一个平衡二叉搜索树。 思路及解法 与数组转化成平衡二叉树相似。可以直接... 查看原文 LeetCode108.将有序数组转换为二叉...
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