The symmetrical two-tree of the Offer (52)

Title Description

Please implement a function to determine if a binary tree is symmetrical. Note that if a binary tree is the same as the image of this binary tree, it is defined as symmetric.

Code:

<span style= "color: #000099;" >/*public class TreeNode {    int val = 0;    TreeNode left = null;    TreeNode right = null;    Public TreeNode (int val) {        this.val = val;    }} */public class Solution {    Boolean issymmetrical (TreeNode proot)        {         if (proot==null) return true;         Return issymmetrical (proot.left,proot.right);        }    Private Boolean issymmetrical (TreeNode left, TreeNode right) {        if (left==null&&right==null) return true;< C13/>if (left==null| | Right==null) return false;        if (left.val==right.val)            return issymmetrical (Left.left, Right.right) &&issymmetrical (Left.right, Right.left);        return false;    }} </span>

The symmetrical two-tree of the Offer (52)