Given therootof a binary tree, returnthe number of nodes where the value of the node is equal to the sum of the values of its descendants. A descendant of a nodexis any node that is on the path from nodexto some leaf node. The sum is considered to be0if the node has no descend...
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...
}intcountNodes(TreeNode*root) {if(root ==NULL)return0;intdepth =GetDepth(root);intleaf =0;intdepth_left, depth_right;while(true) { depth_left= GetDepth(root->left); depth_right= GetDepth(root->right);if(depth_left ==0&& depth_right ==0) { leaf+=1;break; }if(depth_left ==...
what do you need to know about the complete binary tree is, let’s assume the root is depth of 0 and the maximum depth is d, so the total number of nodes besides the leaf level will be 2^ (d) - 1, and the number of leaves is in the range of (1, 2^d) and all we need ...
828. Count Unique Characters of All Substrings of a Given String # 题目 # Let’s define a function countUniqueChars(s) that returns the number of unique characters on s, for example if s = "LEETCODE" then "L", "T","C","O","D" are the unique characters
0896-smallest-subtree-with-all-the-deepest-nodes 0904-leaf-similar-trees 0905-length-of-longest-fibonacci-subsequence 0906-walking-robot-simulation 0920-uncommon-words-from-two-sentences 0921-spiral-matrix-iii 0925-construct-binary-tree-from-preorder-and-postorder-traversal 0931-maximum-frequency-stack ...
A set of practice note, solution, complexity analysis and test bench to leetcode problem set - leetcode/CountSubArrayFixBound.drawio at b58bcceb0ea27d0756ad72fb6a64b3b547fae221 · brianchiang-tw/leetcode
Given a binary tree, count the number of uni-value subtrees. A Uni-value subtree means all nodes of the subtree have the same value.
A Perfect Binary Tree(PBT) is a tree with all leaf nodes at the same depth. All internal nodes have degree 2. 二叉树的第i层至多拥有 个节点数;深度为k的二叉树至多总共有 个节点数,而总计拥有节点数匹配的,称为“满二叉树”; 完满二叉树 (Full Binary Tree): ...
LeetCode 222. Count Complete Tree Nodes 原题链接在这里:https://leetcode.com/problems/count-complete-tree-nodes/ 题目: Given a complete binary tree, count the number of nodes. Definition of a complete binary tree fromWikipedia: In a complete binary tree every level, except possibly the last,...