18TwoTreeIdentical.cpp

#include <bits/stdc++.h>
using namespace std;
struct TreeNode
{
    int data;
    struct TreeNode* left;
    struct TreeNode* right;

    TreeNode(int val)
    {
        data = val;
        left = NULL;
        right =   NULL;
    }
    
};

bool equalTree(TreeNode* p,TreeNode* q){
    if(p==NULL || q==NULL){
        return (p==q);
    }


    return (p->data==q->data)&&(equalTree(p->left,q->left))&&(equalTree(p->right,q->right));
}

int main(){
    struct TreeNode*  root = new TreeNode(2);
    root->left = new TreeNode(5);
    root->left->left = new TreeNode(4);
    root->left->left->left  = new TreeNode(3);
    root->left->left->right  = new TreeNode(2);
    root->left->right = new TreeNode(5);
    root->right = new TreeNode(7);
    root->right->left = new TreeNode(9);
    root->right->left->right = new TreeNode(2);
    root->right->left->right->right = new TreeNode(4);
    root->right->left->right->left = new TreeNode(1);
    root->right->left->left = new TreeNode(3);
    root->right->right = new TreeNode(7);
    


}