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
C++版本可以参见张磊哥哥的解答喔:) http://fisherlei.blogspot.com/2013/01/leetcode-convert-sorted-list-to-binary.html View Code SOLUTION 3: 这个解法使用一个instance variable 来记录当前正在操作的List Node. DFS本身的效果是,从head直到尾部建树,并且将currNode移动到size+1处。 这样可以在1次iterator 我...
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...
1.题目描述 Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 2.解法分析 题意为将一个按升序排列的单链表转换为一个平衡的BST,将单链表转换为平衡树很容易,然后按照先序遍历赋值即可。时间复杂度和空间复杂度都是O(N),时间复杂度上没什么好...
题目链接:https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/ 题目: Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 思路: 新建一个结点保存mid值,该结点的左右子树也递归生成,这是个常用的模板 ...
Can you solve this real interview question? Convert to Base -2 - Given an integer n, return a binary string representing its representation in base -2. Note that the returned string should not have leading zeros unless the string is "0". Example 1:
23 -- 6:11 App Leetcode-0114. Flatten Binary Tree to Linked List 89 -- 1:36 App Leetcode-0067. Add Binary 75 -- 3:26 App Leetcode-0102. Binary Tree Level Order Traversal 43 -- 4:43 App Leetcode-0095. Unique Binary Search Trees II 82 -- 6:19 App Leetcode-0096. Uniq...
* Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */publicclassSolution{public TreeNodesortedListToBST(ListNode head){if(head==null)returnnull;int total=1;ListNode temp=head;while(tem...
Leetcode - Convert Sorted Array to Binary Search Tree Paste_Image.png My code: /** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; }...
Convert Sorted Array to Binary Search Tree Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 本题是二分法的高级应用,每次选择root都是从数列的中间选择,那么最后构造出来的二叉树一定是高度平衡的BST了。