Solution (leetcode-in-java 1.21 API)

java.lang.Object
- g0101_0200.s0101_symmetric_tree.Solution

```
public class Solution
extends Object
```
101 - Symmetric Tree.
Easy

Given the root of a binary tree, check whether it is a mirror of itself (i.e., symmetric around its center).

Example 1:

Input: root = [1,2,2,3,4,4,3]

Output: true

Example 2:

Input: root = [1,2,2,null,3,null,3]

Output: false

Constraints:
- The number of nodes in the tree is in the range [1, 1000].
- -100 <= Node.val <= 100
Follow up: Could you solve it both recursively and iteratively?

- Constructor Summary
  
  Constructors
  Constructor Description
  
  Solution()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  boolean isSymmetric(TreeNode root)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- Solution
```
public Solution()
```

Method Detail

isSymmetric

public boolean isSymmetric(TreeNode root)