but given a node, how to check if it is or not, we should do this: isBalanced(root) = Math.abs(height(root.left) - height(root.right)) < 1 classSolution{publicbooleanisBalanced(TreeNode root){if(root ==null)returntrue;if(Math.abs(height(root.left) - height(root.right)) >1) {...
int GetDepth(TreeNode *root) {if(root == NULL)return0;returnmax(GetDepth(root->left), GetDepth(root->right)) +1; } bool GetAns(TreeNode *root, int dep) {//只有根节点的情况,不用判空,因为不会递归到那if(dep == depth) {returntrue; }if(dep < depth -1) {if(root->left == ...
Source File: balanced_binary_tree.py From LeetCodeInPython with Apache License 2.0 6 votes def check_balance(node): if node == None: return 0 left_depth = check_balance(node.left) if left_depth == -1: return -1 right_depth = check_balance(node.right) if right_depth == -1: ...
* TreeNode(int x) : val(x), left(nullptr), right(nullptr) {} * TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {} * }; */ classSolution{ public: intlen,num; boolflag; voiddfs(TreeNode*root,intnum,vector<int>&arr){ if(num==len-1&...
115th LeetCode Weekly Contest Check Completeness of a Binary Tree,Givenabinarytree,determineifitisa completebinarytree.Definitionofacompletebinarytreefrom Wikipedia:Inacompletebinarytreeeveryle
a splay tree. From what I've read, you won't implement a balanced search in your interview. But I wanted exposure to coding one up and let's face it, splay trees are the bee's knees I did read a lot of red-black tree code. splay tree: insert, search, delete functions ...
The tree will have between 1 and 100 nodes. 这道题给了一棵二叉树,让我们判断是否是一棵完全二叉树 Complete Binary Tree,通过题目中的解释可知,完全二叉树除了最后一行之外,所有位置都是满员的,而且最后一行的结点都是尽可能靠左的,注意跟完满二叉树 Full Bianry Tree 区分开来。最简单直接的方法就是按层序遍...
1classSolution2{3public:4boolisCompleteTree(TreeNode*root)5{6if(root ==NULL)7returnfalse;89queue<TreeNode *>q;10q.push(root);11boolmustHaveNoChild =false;12boolresult =true;13while(!q.empty())14{15TreeNode* pNode =q.front();16q.pop();17if(mustHaveNoChild)//如果一个节点没有子...
Check Completeness of a Binary Tree,Codelink:https://leetcode.com/problems/check-completeness-of-a-binary-tree/Constraint:Inacompletebinarytree,everylevel,exceptpossiblythe...
Given a binary tree, determine if it is a complete binary tree. Definition of a complete binary tree from Wikipedia:In a complete binary tree every level, except possibly the last, is completely filled, and all nodes in the last level are as far left as possible. It can have between 1...