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.

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 Details

    • Solution

      public Solution()

  • Method Details

    • isSymmetric

      public boolean isSymmetric(TreeNode root)