Output: 18 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...
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. 题目大意:计算树中所有祖父结点值为偶数的结点值的和。 方法一:直...
在LeetCode 1973题中,DFS算法的时间复杂度是多少? 文章目录 1. 题目 2. 解题 1. 题目 Given the root of a binary tree, return the number of nodes where the value of the node is equal to the sum of the values of its descendants. A descendant of a node x is any node that is on the...
Given the root node of a binary search tree, return the sum of values of all nodes with value between L and R (inclusive). The binary search tree is guaranteed to have unique values. Example 1: AI检测代码解析 Input: root = [10,5,15,3,7,null,18], L = 7, R = 15 Output: 32 ...
LeetCode 938. Range Sum of BST https://leetcode.com/problems/range-sum-of-bst/ 题目: 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....
查看了几种方案, 递归的方式最简单, 其次运用leetcode 1 Two sum类似的简化方法. 双递归 Java public class Solution { public int pathSum(TreeNode root, int sum) { if(root == null) return 0; return findPath(root, sum) + pathSum(root.left, sum) + pathSum(root.right, sum); ...
Find the number of paths that sum to a given value. The path does not need to start or end at the root or a leaf, but it must go downwards (traveling only from parent nodes to child nodes). The tree has no more than 1,000 nodes and the values are in the range -1,000,000 to...
Return the smallest level X such that the sum of all the values of nodes at level X ...[LeetCode] Maximum path sum From Here For each node, 4 conditions: 1. Node only (因为本题中的节点可能是负值!) 2. L-sub + Node 3. R-sub + Node 4. L-sub + Node + R-sub (in here ...
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:...
938. Range Sum of BST 技术标签:LeetCode 题目: Given the root node of a binary search tree, return the sum of values of all nodes with a value in the range [low, high]. Example 1: Example 2: Constraints: The n... 查看原文