Skip to main content

Find the maximum leaf node in a binary tree

Maximum leaf node in a binary tree

Here given code implementation process.

// C program for 
// Find the maximum leaf node in a binary tree
#include <stdio.h>
#include <stdlib.h>

// Tree Node
struct TreeNode
{
	int data;
	struct TreeNode *left;
	struct TreeNode *right;
};
// Binary Tree
struct BinaryTree
{
	struct TreeNode *root;
};
// Create new tree
struct BinaryTree *newTree()
{
	// Create dynamic node
	struct BinaryTree *tree = 
      (struct BinaryTree *) malloc(sizeof(struct BinaryTree));
	if (tree != NULL)
	{
		tree->root = NULL;
	}
	else
	{
		printf("Memory Overflow to Create tree Tree\n");
	}
	//return new tree
	return tree;
}
// This is creates and returns the new binary tree node
struct TreeNode *newNode(int data)
{
	// Create dynamic node
	struct TreeNode *new_node = 
      (struct TreeNode *) malloc(sizeof(struct TreeNode));
	if (new_node != NULL)
	{
		//Set data and pointer values
		new_node->data = data;
		new_node->left = NULL;
		new_node->right = NULL;
	}
	else
	{
		//This is indicates, segmentation fault or memory overflow problem
		printf("Memory Overflow\n");
	}
	//return new node
	return new_node;
}
// Find the value of max leaf node recursively
void findMaxLeaf(struct TreeNode *node, struct TreeNode **result)
{
	if (node == NULL)
	{
		return;
	}
	if (node->left == NULL && node->right == NULL)
	{
		if ( *result == NULL)
		{
			// First leaf node
			*result = node;
		}
		else if (( *result)->data < node->data)
		{
			*result = node;
		}
	}
	// Visit left and right subtree
	findMaxLeaf(node->left, result);
	findMaxLeaf(node->right, result);
}
// Handles the request of finding the maximum leaf node in binary tree.
void maxLeafNode(struct TreeNode *root)
{
	if (root == NULL)
	{
		return;
	}
	struct TreeNode *result = NULL;
	// Find node value
	findMaxLeaf(root, & result);
	if (result != NULL)
	{
		printf(" Maximum leaf node value is : %d\n", result->data);
	}
	else
	{
		printf(" Max left is : None \n");
	}
}
int main(int argc, char
	const *argv[])
{
	struct BinaryTree *tree = newTree();
	/*
	             4                            
	           /   \    
	         -4     7    
	         / \     \               
	        2   3     12
	       /   / \    / 
	      1   10  8  15
	     /    / \     \
	    3    9   21    13 

	    -----------------
	       Binary tree
	*/
	tree->root = newNode(4);
	tree->root->left = newNode(-4);
	tree->root->left->right = newNode(3);
	tree->root->left->right->left = newNode(10);
	tree->root->left->right->left->left = newNode(9);
	tree->root->left->right->left->right = newNode(21);
	tree->root->left->right->right = newNode(8);
	tree->root->left->left = newNode(2);
	tree->root->left->left->left = newNode(1);
	tree->root->left->left->left->left = newNode(3);
	tree->root->right = newNode(7);
	tree->root->right->right = newNode(12);
	tree->root->right->right->left = newNode(15);
	tree->root->right->right->left->right = newNode(13);
	maxLeafNode(tree->root);
	return 0;
}

Output

 Maximum leaf node value is : 21
/*
  Java program for
  Find the maximum leaf node in a binary tree
*/
// Binary Tree node
class TreeNode
{
	public int data;
	public TreeNode left;
	public TreeNode right;
	public TreeNode(int data)
	{
		// Set node value
		this.data = data;
		this.left = null;
		this.right = null;
	}
}
public class BinaryTree
{
	public TreeNode root;
	public TreeNode result;
	public BinaryTree()
	{
		// Set initial tree root to null
		this.root = null;
		this.result = null;
	}
	// Find the value of max leaf node recursively
	public void findMaxLeaf(TreeNode node)
	{
		if (node == null)
		{
			return;
		}
		if (node.left == null && node.right == null)
		{
			if (this.result == null)
			{
				// First leaf node
				this.result = node;
			}
			else if (this.result.data < node.data)
			{
				this.result = node;
			}
		}
		// Visit left and right subtree
		findMaxLeaf(node.left);
		findMaxLeaf(node.right);
	}
	// Handles the request of finding the 
  	// maximum leaf node in binary tree.
	public void maxLeafNode()
	{
		if (this.root == null)
		{
			return;
		}
		this.result = null;
		// Find node value
		this.findMaxLeaf(this.root);
		if (this.result != null)
		{
			System.out.print(" Maximum leaf node value is : " + 
                             this.result.data + "\n");
		}
		else
		{
			System.out.print(" Max left is : None \n");
		}
	}
	public static void main(String[] args)
	{
		BinaryTree tree = new BinaryTree();
		/*
		         4                            
		       /   \    
		     -4     7    
		     / \     \               
		    2   3     12
		   /   / \    / 
		  1   10  8  15
		 /    / \     \
		3    9   21    13 

		-----------------
		   Binary tree
		*/
		tree.root = new TreeNode(4);
		tree.root.left = new TreeNode(-4);
		tree.root.left.right = new TreeNode(3);
		tree.root.left.right.left = new TreeNode(10);
		tree.root.left.right.left.left = new TreeNode(9);
		tree.root.left.right.left.right = new TreeNode(21);
		tree.root.left.right.right = new TreeNode(8);
		tree.root.left.left = new TreeNode(2);
		tree.root.left.left.left = new TreeNode(1);
		tree.root.left.left.left.left = new TreeNode(3);
		tree.root.right = new TreeNode(7);
		tree.root.right.right = new TreeNode(12);
		tree.root.right.right.left = new TreeNode(15);
		tree.root.right.right.left.right = new TreeNode(13);
		tree.maxLeafNode();
	}
}

Output

 Maximum leaf node value is : 21
// Include header file
#include <iostream>

using namespace std;
/*
  C++ program for
  Find the maximum leaf node in a binary tree
*/
// Binary Tree node
class TreeNode
{
	public: int data;
	TreeNode *left;
	TreeNode *right;
	TreeNode(int data)
	{
		// Set node value
		this->data = data;
		this->left = NULL;
		this->right = NULL;
	}
};
class BinaryTree
{
	public: 
    TreeNode *root;
	TreeNode *result;
	BinaryTree()
	{
		this->root = NULL;
		this->result = NULL;
	}
	// Find the value of max leaf node recursively
	void findMaxLeaf(TreeNode *node)
	{
		if (node == NULL)
		{
			return;
		}
		if (node->left == NULL && node->right == NULL)
		{
			if (this->result == NULL)
			{
				// First leaf node
				this->result = node;
			}
			else if (this->result->data < node->data)
			{
				this->result = node;
			}
		}
		// Visit left and right subtree
		this->findMaxLeaf(node->left);
		this->findMaxLeaf(node->right);
	}
	// Handles the request of finding the
	// maximum leaf node in binary tree.
	void maxLeafNode()
	{
		if (this->root == NULL)
		{
			return;
		}
		this->result = NULL;
		// Find node value
		this->findMaxLeaf(this->root);
		if (this->result != NULL)
		{
			cout << " Maximum leaf node value is : " 
          		 << this->result->data << "\n";
		}
		else
		{
			cout << " Max left is : None \n";
		}
	}
};
int main()
{
	BinaryTree *tree = new BinaryTree();
	/*
	         4                            
	       /   \    
	     -4     7    
	     / \     \               
	    2   3     12
	   /   / \    / 
	  1   10  8  15
	 /    / \     \
	3    9   21    13 
	-----------------
	   Binary tree
	*/
	tree->root = new TreeNode(4);
	tree->root->left = new TreeNode(-4);
	tree->root->left->right = new TreeNode(3);
	tree->root->left->right->left = new TreeNode(10);
	tree->root->left->right->left->left = new TreeNode(9);
	tree->root->left->right->left->right = new TreeNode(21);
	tree->root->left->right->right = new TreeNode(8);
	tree->root->left->left = new TreeNode(2);
	tree->root->left->left->left = new TreeNode(1);
	tree->root->left->left->left->left = new TreeNode(3);
	tree->root->right = new TreeNode(7);
	tree->root->right->right = new TreeNode(12);
	tree->root->right->right->left = new TreeNode(15);
	tree->root->right->right->left->right = new TreeNode(13);
	tree->maxLeafNode();
	return 0;
}

Output

 Maximum leaf node value is : 21
// Include namespace system
using System;
/*
  Csharp program for
  Find the maximum leaf node in a binary tree
*/
// Binary Tree node
public class TreeNode
{
	public int data;
	public TreeNode left;
	public TreeNode right;
	public TreeNode(int data)
	{
		// Set node value
		this.data = data;
		this.left = null;
		this.right = null;
	}
}
public class BinaryTree
{
	public TreeNode root;
	public TreeNode result;
	public BinaryTree()
	{
		// Set initial tree root to null
		this.root = null;
		this.result = null;
	}
	// Find the value of max leaf node recursively
	public void findMaxLeaf(TreeNode node)
	{
		if (node == null)
		{
			return;
		}
		if (node.left == null && node.right == null)
		{
			if (this.result == null)
			{
				// First leaf node
				this.result = node;
			}
			else if (this.result.data < node.data)
			{
				this.result = node;
			}
		}
		// Visit left and right subtree
		this.findMaxLeaf(node.left);
		this.findMaxLeaf(node.right);
	}
	// Handles the request of finding the
	// maximum leaf node in binary tree.
	public void maxLeafNode()
	{
		if (this.root == null)
		{
			return;
		}
		this.result = null;
		// Find node value
		this.findMaxLeaf(this.root);
		if (this.result != null)
		{
			Console.WriteLine(" Maximum leaf node value is : " + 
                          this.result.data );
		}
		else
		{
			Console.Write(" Max left is : None \n");
		}
	}
	public static void Main(String[] args)
	{
		BinaryTree tree = new BinaryTree();
		/*
		         4                            
		       /   \    
		     -4     7    
		     / \     \               
		    2   3     12
		   /   / \    / 
		  1   10  8  15
		 /    / \     \
		3    9   21    13 
		-----------------
		   Binary tree
		*/
		tree.root = new TreeNode(4);
		tree.root.left = new TreeNode(-4);
		tree.root.left.right = new TreeNode(3);
		tree.root.left.right.left = new TreeNode(10);
		tree.root.left.right.left.left = new TreeNode(9);
		tree.root.left.right.left.right = new TreeNode(21);
		tree.root.left.right.right = new TreeNode(8);
		tree.root.left.left = new TreeNode(2);
		tree.root.left.left.left = new TreeNode(1);
		tree.root.left.left.left.left = new TreeNode(3);
		tree.root.right = new TreeNode(7);
		tree.root.right.right = new TreeNode(12);
		tree.root.right.right.left = new TreeNode(15);
		tree.root.right.right.left.right = new TreeNode(13);
		tree.maxLeafNode();
	}
}

Output

 Maximum leaf node value is : 21
package main
import "fmt"
/*
  Go program for
  Find the maximum leaf node in a binary tree
*/
// Binary Tree node
type TreeNode struct {
	data int
	left * TreeNode
	right * TreeNode
}
func getTreeNode(data int) * TreeNode {
	var me *TreeNode = &TreeNode {}
	// Set node value
	me.data = data
	me.left = nil
	me.right = nil
	return me
}
type BinaryTree struct {
	root * TreeNode
	result * TreeNode
}
func getBinaryTree() * BinaryTree {
	var me *BinaryTree = &BinaryTree {}
	// Set initial tree root to null
	me.root = nil
	me.result = nil
	return me
}
// Find the value of max leaf node recursively
func(this *BinaryTree) findMaxLeaf(node * TreeNode) {
	if node == nil {
		return
	}
	if node.left == nil && node.right == nil {
		if this.result == nil {
			// First leaf node
			this.result = node
		} else if this.result.data < node.data {
			this.result = node
		}
	}
	// Visit left and right subtree
	this.findMaxLeaf(node.left)
	this.findMaxLeaf(node.right)
}
// Handles the request of finding the
// maximum leaf node in binary tree.
func(this BinaryTree) maxLeafNode() {
	if this.root == nil {
		return
	}
	this.result = nil
	// Find node value
	this.findMaxLeaf(this.root)
	if this.result != nil {
		fmt.Print(" Maximum leaf node value is : ", this.result.data, "\n")
	} else {
		fmt.Print(" Max left is : None \n")
	}
}
func main() {
	var tree * BinaryTree = getBinaryTree()
	/*
	         4                            
	       /   \    
	     -4     7    
	     / \     \               
	    2   3     12
	   /   / \    / 
	  1   10  8  15
	 /    / \     \
	3    9   21    13 
	-----------------
	   Binary tree
	*/
	tree.root = getTreeNode(4)
	tree.root.left = getTreeNode(-4)
	tree.root.left.right = getTreeNode(3)
	tree.root.left.right.left = getTreeNode(10)
	tree.root.left.right.left.left = getTreeNode(9)
	tree.root.left.right.left.right = getTreeNode(21)
	tree.root.left.right.right = getTreeNode(8)
	tree.root.left.left = getTreeNode(2)
	tree.root.left.left.left = getTreeNode(1)
	tree.root.left.left.left.left = getTreeNode(3)
	tree.root.right = getTreeNode(7)
	tree.root.right.right = getTreeNode(12)
	tree.root.right.right.left = getTreeNode(15)
	tree.root.right.right.left.right = getTreeNode(13)
	tree.maxLeafNode()
}

Output

 Maximum leaf node value is : 21
<?php
/*
  Php program for
  Find the maximum leaf node in a binary tree
*/
// Binary Tree node
class TreeNode
{
	public $data;
	public $left;
	public $right;
	public	function __construct($data)
	{
		// Set node value
		$this->data = $data;
		$this->left = NULL;
		$this->right = NULL;
	}
}
class BinaryTree
{
	public $root;
	public $result;
	public	function __construct()
	{
		$this->root = NULL;
		$this->result = NULL;
	}
	// Find the value of max leaf node recursively
	public	function findMaxLeaf($node)
	{
		if ($node == NULL)
		{
			return;
		}
		if ($node->left == NULL && $node->right == NULL)
		{
			if ($this->result == NULL)
			{
				// First leaf node
				$this->result = $node;
			}
			else if ($this->result->data < $node->data)
			{
				$this->result = $node;
			}
		}
		// Visit left and right subtree
		$this->findMaxLeaf($node->left);
		$this->findMaxLeaf($node->right);
	}
	// Handles the request of finding the
	// maximum leaf node in binary tree.
	public	function maxLeafNode()
	{
		if ($this->root == NULL)
		{
			return;
		}
		$this->result = NULL;
		// Find node value
		$this->findMaxLeaf($this->root);
		if ($this->result != NULL)
		{
			echo(" Maximum leaf node value is : ".$this->result->data."\n");
		}
		else
		{
			echo(" Max left is : None \n");
		}
	}
}

function main()
{
	$tree = new BinaryTree();
	/*
	         4                            
	       /   \    
	     -4     7    
	     / \     \               
	    2   3     12
	   /   / \    / 
	  1   10  8  15
	 /    / \     \
	3    9   21    13 
	-----------------
	   Binary tree
	*/
	$tree->root = new TreeNode(4);
	$tree->root->left = new TreeNode(-4);
	$tree->root->left->right = new TreeNode(3);
	$tree->root->left->right->left = new TreeNode(10);
	$tree->root->left->right->left->left = new TreeNode(9);
	$tree->root->left->right->left->right = new TreeNode(21);
	$tree->root->left->right->right = new TreeNode(8);
	$tree->root->left->left = new TreeNode(2);
	$tree->root->left->left->left = new TreeNode(1);
	$tree->root->left->left->left->left = new TreeNode(3);
	$tree->root->right = new TreeNode(7);
	$tree->root->right->right = new TreeNode(12);
	$tree->root->right->right->left = new TreeNode(15);
	$tree->root->right->right->left->right = new TreeNode(13);
	$tree->maxLeafNode();
}
main();

Output

 Maximum leaf node value is : 21
/*
  Node JS program for
  Find the maximum leaf node in a binary tree
*/
// Binary Tree node
class TreeNode
{
	constructor(data)
	{
		// Set node value
		this.data = data;
		this.left = null;
		this.right = null;
	}
}
class BinaryTree
{
	constructor()
	{
		this.root = null;
		this.result = null;
	}
	// Find the value of max leaf node recursively
	findMaxLeaf(node)
	{
		if (node == null)
		{
			return;
		}
		if (node.left == null && node.right == null)
		{
			if (this.result == null)
			{
				// First leaf node
				this.result = node;
			}
			else if (this.result.data < node.data)
			{
				this.result = node;
			}
		}
		// Visit left and right subtree
		this.findMaxLeaf(node.left);
		this.findMaxLeaf(node.right);
	}
	// Handles the request of finding the
	// maximum leaf node in binary tree.
	maxLeafNode()
	{
		if (this.root == null)
		{
			return;
		}
		this.result = null;
		// Find node value
		this.findMaxLeaf(this.root);
		if (this.result != null)
		{
			process.stdout.write(" Maximum leaf node value is : " +
                                 this.result.data + "\n");
		}
		else
		{
			process.stdout.write(" Max left is : None \n");
		}
	}
}

function main()
{
	var tree = new BinaryTree();
	/*
	         4                            
	       /   \    
	     -4     7    
	     / \     \               
	    2   3     12
	   /   / \    / 
	  1   10  8  15
	 /    / \     \
	3    9   21    13 
	-----------------
	   Binary tree
	*/
	tree.root = new TreeNode(4);
	tree.root.left = new TreeNode(-4);
	tree.root.left.right = new TreeNode(3);
	tree.root.left.right.left = new TreeNode(10);
	tree.root.left.right.left.left = new TreeNode(9);
	tree.root.left.right.left.right = new TreeNode(21);
	tree.root.left.right.right = new TreeNode(8);
	tree.root.left.left = new TreeNode(2);
	tree.root.left.left.left = new TreeNode(1);
	tree.root.left.left.left.left = new TreeNode(3);
	tree.root.right = new TreeNode(7);
	tree.root.right.right = new TreeNode(12);
	tree.root.right.right.left = new TreeNode(15);
	tree.root.right.right.left.right = new TreeNode(13);
	tree.maxLeafNode();
}
main();

Output

 Maximum leaf node value is : 21
#  Python 3 program for
#  Find the maximum leaf node in a binary tree

#  Binary Tree node
class TreeNode :
	def __init__(self, data) :
		#  Set node value
		self.data = data
		self.left = None
		self.right = None
	

class BinaryTree :
	def __init__(self) :
		self.root = None
		self.result = None
	
	#  Find the value of max leaf node recursively
	def findMaxLeaf(self, node) :
		if (node == None) :
			return
		
		if (node.left == None and node.right == None) :
			if (self.result == None) :
				#  First leaf node
				self.result = node
			elif (self.result.data < node.data) :
				self.result = node
			
		
		#  Visit left and right subtree
		self.findMaxLeaf(node.left)
		self.findMaxLeaf(node.right)
	
	#  Handles the request of finding the
	#  maximum leaf node in binary tree.
	def maxLeafNode(self) :
		if (self.root == None) :
			return
		
		self.result = None
		#  Find node value
		self.findMaxLeaf(self.root)
		if (self.result != None) :
			print(" Maximum leaf node value is : ", self.result.data )
		else :
			print(" Max left is : None ")
		
	

def main() :
	tree = BinaryTree()
	#          4                            
	#        /   \    
	#      -4     7    
	#      / \     \               
	#     2   3     12
	#    /   / \    / 
	#   1   10  8  15
	#  /    / \     \
	# 3    9   21    13 
	# -----------------
	#   Binary tree
	tree.root = TreeNode(4)
	tree.root.left = TreeNode(-4)
	tree.root.left.right = TreeNode(3)
	tree.root.left.right.left = TreeNode(10)
	tree.root.left.right.left.left = TreeNode(9)
	tree.root.left.right.left.right = TreeNode(21)
	tree.root.left.right.right = TreeNode(8)
	tree.root.left.left = TreeNode(2)
	tree.root.left.left.left = TreeNode(1)
	tree.root.left.left.left.left = TreeNode(3)
	tree.root.right = TreeNode(7)
	tree.root.right.right = TreeNode(12)
	tree.root.right.right.left = TreeNode(15)
	tree.root.right.right.left.right = TreeNode(13)
	tree.maxLeafNode()

if __name__ == "__main__": main()

Output

 Maximum leaf node value is :  21
#  Ruby program for
#  Find the maximum leaf node in a binary tree

#  Binary Tree node
class TreeNode 
	# Define the accessor and reader of class TreeNode
	attr_reader :data, :left, :right
	attr_accessor :data, :left, :right
	def initialize(data) 
		#  Set node value
		self.data = data
		self.left = nil
		self.right = nil
	end

end

class BinaryTree 
	# Define the accessor and reader of class BinaryTree
	attr_reader :root, :result
	attr_accessor :root, :result
	def initialize() 
		self.root = nil
		self.result = nil
	end

	#  Find the value of max leaf node recursively
	def findMaxLeaf(node) 
		if (node == nil) 
			return
		end

		if (node.left == nil && node.right == nil) 
			if (self.result == nil) 
				#  First leaf node
				self.result = node
			elsif (self.result.data < node.data) 
				self.result = node
			end

		end

		#  Visit left and right subtree
		self.findMaxLeaf(node.left)
		self.findMaxLeaf(node.right)
	end

	#  Handles the request of finding the
	#  maximum leaf node in binary tree.
	def maxLeafNode() 
		if (self.root == nil) 
			return
		end

		self.result = nil
		#  Find node value
		self.findMaxLeaf(self.root)
		if (self.result != nil) 
			print(" Maximum leaf node value is : ", self.result.data ,"\n")
		else
 
			print(" Max left is : None \n")
		end

	end

end

def main() 
	tree = BinaryTree.new()
	#         4                            
	#       /   \    
	#     -4     7    
	#     / \     \               
	#    2   3     12
	#   /   / \    / 
	#  1   10  8  15
	# /    / \     \
	# 3    9   21    13 
	# -----------------
	#   Binary tree
	tree.root = TreeNode.new(4)
	tree.root.left = TreeNode.new(-4)
	tree.root.left.right = TreeNode.new(3)
	tree.root.left.right.left = TreeNode.new(10)
	tree.root.left.right.left.left = TreeNode.new(9)
	tree.root.left.right.left.right = TreeNode.new(21)
	tree.root.left.right.right = TreeNode.new(8)
	tree.root.left.left = TreeNode.new(2)
	tree.root.left.left.left = TreeNode.new(1)
	tree.root.left.left.left.left = TreeNode.new(3)
	tree.root.right = TreeNode.new(7)
	tree.root.right.right = TreeNode.new(12)
	tree.root.right.right.left = TreeNode.new(15)
	tree.root.right.right.left.right = TreeNode.new(13)
	tree.maxLeafNode()
end

main()

Output

 Maximum leaf node value is : 21
/*
  Scala program for
  Find the maximum leaf node in a binary tree
*/
// Binary Tree node
class TreeNode(var data: Int,
	var left: TreeNode,
		var right: TreeNode)
{
	def this(data: Int)
	{
		// Set node value
		this(data, null,null);
	}
}
class BinaryTree(var root: TreeNode,
	var result: TreeNode)
{
	def this()
	{
		this(null, null);
	}
	// Find the value of max leaf node recursively
	def findMaxLeaf(node: TreeNode): Unit = {
		if (node == null)
		{
			return;
		}
		if (node.left == null && node.right == null)
		{
			if (this.result == null)
			{
				// First leaf node
				this.result = node;
			}
			else if (this.result.data < node.data)
			{
				this.result = node;
			}
		}
		// Visit left and right subtree
		findMaxLeaf(node.left);
		findMaxLeaf(node.right);
	}
	// Handles the request of finding the
	// maximum leaf node in binary tree.
	def maxLeafNode(): Unit = {
		if (this.root == null)
		{
			return;
		}
		this.result = null;
		// Find node value
		this.findMaxLeaf(this.root);
		if (this.result != null)
		{
			print(" Maximum leaf node value is : " + 
                  this.result.data + "\n");
		}
		else
		{
			print(" Max left is : None \n");
		}
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var tree: BinaryTree = new BinaryTree();
		/*
		         4                            
		       /   \    
		     -4     7    
		     / \     \               
		    2   3     12
		   /   / \    / 
		  1   10  8  15
		 /    / \     \
		3    9   21    13 
		-----------------
		   Binary tree
		*/
		tree.root = new TreeNode(4);
		tree.root.left = new TreeNode(-4);
		tree.root.left.right = new TreeNode(3);
		tree.root.left.right.left = new TreeNode(10);
		tree.root.left.right.left.left = new TreeNode(9);
		tree.root.left.right.left.right = new TreeNode(21);
		tree.root.left.right.right = new TreeNode(8);
		tree.root.left.left = new TreeNode(2);
		tree.root.left.left.left = new TreeNode(1);
		tree.root.left.left.left.left = new TreeNode(3);
		tree.root.right = new TreeNode(7);
		tree.root.right.right = new TreeNode(12);
		tree.root.right.right.left = new TreeNode(15);
		tree.root.right.right.left.right = new TreeNode(13);
		tree.maxLeafNode();
	}
}

Output

 Maximum leaf node value is : 21
/*
  Swift 4 program for
  Find the maximum leaf node in a binary tree
*/
// Binary Tree node
class TreeNode
{
	var data: Int;
	var left: TreeNode? ;
	var right: TreeNode? ;
	init(_ data: Int)
	{
		// Set node value
		self.data = data;
		self.left = nil;
		self.right = nil;
	}
}
class BinaryTree
{
	var root: TreeNode? ;
	var result: TreeNode? ;
	init()
	{
		self.root = nil;
		self.result = nil;
	}
	// Find the value of max leaf node recursively
	func findMaxLeaf(_ node: TreeNode? )
	{
		if (node == nil)
		{
			return;
		}
		if (node!.left == nil && node!.right == nil)
		{
			if (self.result == nil)
			{
				// First leaf node
				self.result = node;
			}
			else if (self.result!.data < node!.data)
			{
				self.result = node;
			}
		}
		// Visit left and right subtree
		self.findMaxLeaf(node!.left);
		self.findMaxLeaf(node!.right);
	}
	// Handles the request of finding the
	// maximum leaf node in binary tree.
	func maxLeafNode()
	{
		if (self.root == nil)
		{
			return;
		}
		self.result = nil;
		// Find node value
		self.findMaxLeaf(self.root);
		if (self.result  != nil)
		{
			print(" Maximum leaf node value is : ", self.result!.data );
		}
		else
		{
			print(" Max left is : None ");
		}
	}
}
func main()
{
	let tree: BinaryTree = BinaryTree();
	/*
	         4                            
	       /   \    
	     -4     7    
	     / \     \               
	    2   3     12
	   /   / \    / 
	  1   10  8  15
	 /    / \     \
	3    9   21    13 
	-----------------
	   Binary tree
	*/
	tree.root = TreeNode(4);
	tree.root!.left = TreeNode(-4);
	tree.root!.left!.right = TreeNode(3);
	tree.root!.left!.right!.left = TreeNode(10);
	tree.root!.left!.right!.left!.left = TreeNode(9);
	tree.root!.left!.right!.left!.right = TreeNode(21);
	tree.root!.left!.right!.right = TreeNode(8);
	tree.root!.left!.left = TreeNode(2);
	tree.root!.left!.left!.left = TreeNode(1);
	tree.root!.left!.left!.left!.left = TreeNode(3);
	tree.root!.right = TreeNode(7);
	tree.root!.right!.right = TreeNode(12);
	tree.root!.right!.right!.left = TreeNode(15);
	tree.root!.right!.right!.left!.right = TreeNode(13);
	tree.maxLeafNode();
}
main();

Output

 Maximum leaf node value is :  21
/*
  Kotlin program for
  Find the maximum leaf node in a binary tree
*/
// Binary Tree node
class TreeNode
{
	var data: Int;
	var left: TreeNode ? ;
	var right: TreeNode ? ;
	constructor(data: Int)
	{
		// Set node value
		this.data = data;
		this.left = null;
		this.right = null;
	}
}
class BinaryTree
{
	var root: TreeNode ? ;
	var result: TreeNode ? ;
	constructor()
	{
		this.root = null;
		this.result = null;
	}
	// Find the value of max leaf node recursively
	fun findMaxLeaf(node: TreeNode ? ): Unit
	{
		if (node == null)
		{
			return;
		}
		if (node.left == null && node.right == null)
		{
			if (this.result == null)
			{
				// First leaf node
				this.result = node;
			}
			else if (this.result!!.data < node.data)
			{
				this.result = node;
			}
		}
		// Visit left and right subtree
		this.findMaxLeaf(node.left);
		this.findMaxLeaf(node.right);
	}
	// Handles the request of finding the
	// maximum leaf node in binary tree.
	fun maxLeafNode(): Unit
	{
		if (this.root == null)
		{
			return;
		}
		this.result = null;
		// Find node value
		this.findMaxLeaf(this.root);
		if (this.result != null)
		{
			print(" Maximum leaf node value is : " + 
                  this.result!!.data + "\n");
		}
		else
		{
			print(" Max left is : None \n");
		}
	}
}
fun main(args: Array < String > ): Unit
{
	val tree: BinaryTree = BinaryTree();
	/*
	         4                            
	       /   \    
	     -4     7    
	     / \     \               
	    2   3     12
	   /   / \    / 
	  1   10  8  15
	 /    / \     \
	3    9   21    13 
	-----------------
	   Binary tree
	*/
	tree.root = TreeNode(4);
	tree.root?.left = TreeNode(-4);
	tree.root?.left?.right = TreeNode(3);
	tree.root?.left?.right?.left = TreeNode(10);
	tree.root?.left?.right?.left?.left = TreeNode(9);
	tree.root?.left?.right?.left?.right = TreeNode(21);
	tree.root?.left?.right?.right = TreeNode(8);
	tree.root?.left?.left = TreeNode(2);
	tree.root?.left?.left?.left = TreeNode(1);
	tree.root?.left?.left?.left?.left = TreeNode(3);
	tree.root?.right = TreeNode(7);
	tree.root?.right?.right = TreeNode(12);
	tree.root?.right?.right?.left = TreeNode(15);
	tree.root?.right?.right?.left?.right = TreeNode(13);
	tree.maxLeafNode();
}

Output

 Maximum leaf node value is : 21




Comment

Please share your knowledge to improve code and content standard. Also submit your doubts, and test case. We improve by your feedback. We will try to resolve your query as soon as possible.

New Comment