Explanation: The red nodes are the nodes with even-value grandparent while the blue nodes are the even-value grandparents. Constraints: The number of nodes in the tree is between1and10^4. The value of nodes is between1and100. 祖父节点值为偶数的节点和。 给你一棵二叉树,请你返回满足以下条...
Explanation: The red nodes are the nodes with even-value grandparent while the blue nodes are the even-value grandparents. Constraints: The number of nodes in the tree is between1and10^4. The value of nodes is between1and100. 解题思路:遍历树,递归函数的参数带上父节点的值即可。 代码如下: ...
Explanation: The red nodes are the nodes with even-value grandparent while the blue nodes are the even-value grandparents. 1. 2. 3. Constraints: The number of nodes in the tree is between1and10^4. The value of nodes is between1and100. 题目大意:计算树中所有祖父结点值为偶数的结点值的和...
递归 日期 题目地址:https://leetcode.com/contest/weekly-contest-110/problems/range-sum-of-bst/ 题目描述 Given therootnode of a binary search tree, return the sum of values of all nodes with value betweenLandR(inclusive). The binary search tree is guaranteed to have unique values. Example 1...
3112. 访问消失节点的最少时间 Minimum Time to Visit Disappearing Nodes 力扣 LeetCode 题解 11:01 2959. 关闭分部的可行集合数目 Number of Possible Sets of Closing Branches 力扣 LeetCode 题解 17:28 2956. 找到两个数组中的公共元素 Find Common Elements Between Two Arrays 力扣 LeetCode 题解 04:...
Input:root=[0]Output:1For the nodewithvalue0:The sumofits descendants is0since it has no descendants.Constraints:The numberofnodesinthe tree isinthe range[1,10^5].0<=Node.val<=10^5 来源:力扣(LeetCode) 链接:https://leetcode-cn.com/problems/count-nodes-equal-to-sum-of-descendants著作权...
The number of nodes in the tree is at most 10000. The final answer is guaranteed to be less than 2^31. 题意分析 这道题需要了解二叉搜索树的定义,以及递归/循环的知识。 我的实现及调优过程 方法1:356 ms 方法1我的思路是先看[L, R]这个range能不能卡住当前节点,即当前节点值v在[L,R]内。
(来源:https://leetcode.com/problems/sum-of-left-leaves/) 关键:preOrder + 识别出left leaf node 非递归:TODO; 递归:preOrder,处理好何时加上() 1. 非递归 class Solution { public int sumOfLeftLeaves(TreeNode root) { if(root == null) { return 0; } Stack<TreeNode> nodeS = new Stack...
LeetCode 371.Sum of Two Integers 371.Sum of Two Integers 代码语言:txt 复制 371. Sum of Two Integers Pick One Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -. Example 1: Input: a = 1, b = 2...
原文链接[每日 LeetCode] 938. Range Sum of BST Description: Given therootnode of a binary search tree, return the sum of values of all nodes with value betweenLandR(inclusive). The binary search tree is guaranteed to have unique values. ...