Package g0101_0200.s0101_symmetric_tree

Class Solution

java.lang.Object

g0101_0200.s0101_symmetric_tree.Solution

public class Solution
extends Object

101 - Symmetric Tree.<p>Easy</p> <p>Given the <code>root</code> of a binary tree, <em>check whether it is a mirror of itself</em> (i.e., symmetric around its center).</p> <p><strong>Example 1:</strong></p> <p><img src="https://assets.leetcode.com/uploads/2021/02/19/symtree1.jpg" alt="" /></p> <p><strong>Input:</strong> root = [1,2,2,3,4,4,3]</p> <p><strong>Output:</strong> true</p> <p><strong>Example 2:</strong></p> <p><img src="https://assets.leetcode.com/uploads/2021/02/19/symtree2.jpg" alt="" /></p> <p><strong>Input:</strong> root = [1,2,2,null,3,null,3]</p> <p><strong>Output:</strong> false</p> <p><strong>Constraints:</strong></p> <ul> <li>The number of nodes in the tree is in the range <code>[1, 1000]</code>.</li> <li><code>-100 <= Node.val <= 100</code></li> </ul> <p><strong>Follow up:</strong> Could you solve it both recursively and iteratively?</p>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

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 Details

Solution

public Solution()

Method Details

isSymmetric

public boolean isSymmetric(TreeNode root)