3.当右子树不存在而左子树存在时,递归1 + countNodes(root->left); 4.当左右子树都不存在时,递归结束,返回1。 代码 /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL)...
1intcountNodes(TreeNode*root) {2inth = getHeight(root), count =0;3while(root) {4//情况一:左孩子是满二叉树(右孩子可能是完全二叉树,也可能是满二叉树)5if(getHeight(root -> right) == h -1) {6count +=1<< h;//根节点 + 左孩子7root = root ->right;8}9//情况二:左孩子是完全...
Given a complete binary tree, count the number of nodes. 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 and 2h...
https://leetcode.com/problems/count-complete-tree-nodes/ 题目: complete Definition of a complete binary tree fromWikipedia: 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 betwee...
LeetCode: 222. Count Complete Tree Nodes 题目描述 Given a complete binary tree, count the number of nodes. Note: 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 ...
首先complete binary tree 的左子树和右子树中肯定会有一个 perfect binary tree。 假如countNodes 的时间消耗是 T(n)。那么对于不是 perfect binary tree 的子树,时间消耗就是 T(n/2),perfect binary tree 那部分因为计算了树的高度,就是 clog(n)。 T(n) = T(n/2) + c1 lgn = T(n/4) + c1 lg...
222. Count Complete Tree Nodes.py Browse files main Filip-Dymczyk committed Mar 24, 2024 1 parent f35823f commit 9fb3f55 Showing 1 changed file with 0 additions and 0 deletions. Whitespace Ignore whitespace Split Unified Empty file added 0 222. Count Complete Tree Nodes.py Empty ...
222. Count Complete Tree Nodes 2019-12-25 11:05 −- 题目思路 [题目来源](https://leetcode.com/problems/count-complete-tree-nodes/) - C++代码实现 ``` class Solution { public: int countNodes(TreeNode* root) { if ... 尚修能的技术博客 ...
222. Count Complete Tree Nodes 2019-12-25 11:05 −- 题目思路 [题目来源](https://leetcode.com/problems/count-complete-tree-nodes/) - C++代码实现 ``` class Solution { public: int countNodes(TreeNode* root) { if ... 尚修能的技术博客 ...
A set of practice note, solution, complexity analysis and test bench to leetcode problem set - leetcode/CountSubArrayFixBound.drawio at b58bcceb0ea27d0756ad72fb6a64b3b547fae221 · brianchiang-tw/leetcode