Total Accepted: 32628 Total Submissions: 129569 Difficulty: Medium 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 comple…

[LeetCode]222. Count Complete Tree Nodes 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.me/ 题目地址:https://leetcode.com/problems/count-complete-tree-nodes/description/ 题目描述: Given a complete binary tree, count the n…

Count Complete Tree Nodes 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 the…

Question: 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…

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 pos…

Given the root of a complete binary tree, return the number of the nodes in the tree. According to Wikipedia, every level, except possibly the last, is completely filled in a complete binary tree, and all nodes in the last level are as far left as po…

完全二叉树的定义:若设二叉树的深度为h,除第 h 层外,其它各层 (1-h-1) 的结点数都达到最大个数,第 h 层所有的结点都连续集中在最左边,这就是完全二叉树. 解题思路:将树按照层进行遍历,如果出现null后还出现非null则能证明这个不是完全二叉树 https://leetcode.com/problems/check-completeness-of-a-binary-tree/discuss/205768/Java-easy-Level-Order-Traversal-one-whil…

1 题目 Given a complete binary tree, count the number of nodes. 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 nodes inclu…

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 the last level are as far left…

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 po…

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 pos…

题意 给一棵 complete binary tree,数数看一共有多少个结点.做题链接 直观做法:递归 var countNodes = function(root) { if(root===null) return 0; return 1+countNodes(root.left)+countNodes(root.right); }; 老实说,一道难度为 medium 的题目,这么几秒钟的时间就做出来,我心中有一种不真实感. 所以,我看了一下 discuss 区其他人的解法,看是不是我自己想…

完全二叉树是从左边开始一点点填充节点的,因此需要计算所有的节点的个数. 则分别从左边和右边来进行传递的,当左右是完全二叉树的时候,其节点个数就是pow(2,h)-1. /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} *…

/* 满二叉树的特点是2^n-1,对于完全二叉树,一个node如果左右子树深度相同,那么 是一个满二叉树.如果不是,那就把node算上,继续往下看,下边的可能是满二叉树 由于完全二叉树中有一些子满二叉树,所以可以省时间 */ public int countNodes(TreeNode root) { if (root==null) return 0; int l = getLeft(root); int r = getRight(root); return (l == r)?(1<<l)-1…

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 pos…

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 pos…

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 the last level are as far left…

给出一个完全二叉树,求出该树的节点个数.完全二叉树的定义如下:在完全二叉树中,除了最底层节点可能没填满外,其余每层节点数都达到最大值,并且最下面一层的节点都集中在该层最左边的若干位置.若最底层为第 h 层,则该层包含1~ 2h 个节点.详见:https://leetcode.com/problems/count-complete-tree-nodes/description/ Java实现: 分别找出以当前节点为根节点的左子树和右子树的高度并对比,如果相等,则说明是满二叉树,直接返回节点个数,如…

2018-09-25 16:36:25 问题描述: 问题求解: 单纯遍历了一遍,emmm,果然TLE. 解题思路就是比较左边树高度和右边树高度,如果相等,那么就是一个满二叉树,返回1 << h - 1即可,如果不是,则递归的计算左右子树的个数. 时间复杂度:O(logn * logn) public int countNodes(TreeNode root) { if (root == null) return 0; int l = leftHeight(root); int r = righ…

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 po…

原题链接在这里:https://leetcode.com/problems/count-complete-tree-nodes/ 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 complete…

题目描述 给出一个完全二叉树,求出该树的节点个数. 说明: 完全二叉树的定义如下:在完全二叉树中,除了最底层节点可能没填满外,其余每层节点数都达到最大值,并且最下面一层的节点都集中在该层最左边的若干位置.若最底层为第 h 层,则该层包含 1~ 2h 个节点. 示例: 输入: 1 / \ 2 3 / \ / 4 5 6 输出: 6 解题思路 从根节点开始分别判断左右子树的高度: 若左子树高度等于右子树,说明左子树一定为满二叉树,可得左子树的总节点个数,然后递归求右子树的节点数: 若左子树高度大于右…

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 pos…

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 pos…

Description: Given a complete binary tree, count the number of nodes. 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 2hnode…

/** * Definition for a binary tree node. * struct TreeNode { * int val; * struct TreeNode *left; * struct TreeNode *right; * }; */ #define MAX 1000 int Path[MAX]; int index1; int power(int x,int n){ int i,re; if(n==0)return 1; for(i=0,re=1;i<n;++i){…

解法一:递归 int countNodes(TreeNode* root) { if (root == NULL) ; TreeNode *pLeft = root->left; TreeNode *pRight = root->right; , rdepth = ; while (pLeft) { ldepth++; pLeft = pLeft->left; } while (pRight) { rdepth++; pRight = pRight->right; } if (ld…

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 the last level are as far left…

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 pos…

题目: 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…