#include <iostream>
#include <stdio.h>
#include <stdlib.h>
 
using namespace std;
 
struct TreeNode{
	int data;
	TreeNode* left;
	TreeNode* right;
};
 
struct TreeNode* newNode(int data)
{
	struct TreeNode* node = (struct TreeNode*)malloc(sizeof(struct TreeNode));
	node->data=data;
	node->left=NULL;
	node->right=NULL;
	return node;
}
 
void deleteTree(TreeNode* root)
{
	if(root==NULL) return;
 
	deleteTree(root->left);
	deleteTree(root->right);
 
	free(root);
}
 
int main()
{
	struct TreeNode* root=newNode(1);
	root->left=newNode(2);
	root->right=newNode(3);
 
	deleteTree(root);
 
	cout<<root->data<<endl;
 
	return 0;
}

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