/**
 @author Farheen Bano
  
 References-
 https://leetcode.com/problems/same-tree/
 https://www.geeksforgeeks.org/check-if-two-trees-have-same-structure/
*/

import java.io.*;
import java.util.*;
import java.lang.*;

/**
 * Definition for a binary tree node.
 * public class TreeNode {
 *     int val;
 *     TreeNode left;
 *     TreeNode right;
 *     TreeNode() {}
 *     TreeNode(int val) { this.val = val; }
 *     TreeNode(int val, TreeNode left, TreeNode right) {
 *         this.val = val;
 *         this.left = left;
 *         this.right = right;
 *     }
 * }
 */
class Solution {
    public boolean isSameTree(TreeNode p, TreeNode q) {
        if(p==null && q==null)
            return true;
        if(p==null || q==null)
            return false;
        return p.val==q.val && isSameTree(p.left,q.left) && isSameTree(p.right,q.right);
    }
}
