/* To get the count of leaf nodes in a binary tree */ public static int getLeafCountOfBinaryTree(TreeNode node) { if(node == null) return 0; if(node.left == null && node.right == null) return 1; else return getLeafCountOfBinaryTree(node.left) + getLeafCountOfBinaryTree(node...
Here is the source code of a Python program to count the number of leaf nodes in a tree. The program output is shown below. classTree:def__init__(self,data=None):self.key=dataself.children=[]defset_root(self,data):self.key=datadefadd(self,node):self.children.append(node)defsearch(...
classSolution {public:intcountNodes(TreeNode*root) {inthLeft =leftHeight(root);inthRight =rightHeight(root);if(hLeft == hRight)returnpow(2, hLeft) -1;returncountNodes(root->left) + countNodes(root->right) +1; }intleftHeight(TreeNode*root) {if(!root)return0;return1+ leftHeight(roo...
then number of leaf nodes in this tree will be 1 Problem Solution We can easily find the number of leaf nodes present in any tree using recursion. A leaf node is a node whose left and right child are NULL. We just need to check this single condition to determine whether the node is ...
What is a leaf node in a binary tree? A leaf node is a node that does not have any children. How should the function behave if the tree is empty? The function should return 0 if the tree is empty. HAPPY CASE Input: A binary tree with three leaf nodes Output: 3 Explanation: Th...
A binary tree is a special type of non-linear data structure where every node may contain a single child node, two child nodes, or no child node. A node can have at most two child nodes in this hierarchical data structure. In a binary tree, child nodes ...
//in one word, there is binary search in another binary search class Solution { public int countNodes(TreeNode root) { if (root == null) return 0; int d = computeDepth(root); //so we compuate the depth first, and we will use this important num to get the range number ...
The number of nodes in the tree is in the range [0, 5 * 104]. 0 <= Node.val <= 5 * 104 The tree is guaranteed to be complete. 完全二叉树的节点个数。 给你一棵 完全二叉树 的根节点 root ,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,...
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 path from node x to some leaf node. The sum is considered to be 0 if the node ...
Given a binary tree and an integer k, count the total number of paths in the tree whose sum of all nodes is equal to k. The path can be any path that is on the root-to-leaf path in the binary tree, or it can be a direct path from the root to a leaf.