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In this post, you will find the solution for the Symmetric Tree in C++, Java & Python-LeetCode problem. We are providing the correct and tested solutions to coding problems present on LeetCode. If you are not able to solve any problem, then you can take help from our Blog/website.
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Link for the Problem – Symmetric Tree– LeetCode Problem
Symmetric Tree– LeetCode Problem
Problem:
Given the root
of a binary tree, check whether it is a mirror of itself (i.e., symmetric around its center).
Example 1:
![Symmetric Tree LeetCode Programming Solutions | LeetCode Problem Solutions in C++, Java, & Python [💯Correct] 2 symtree1](https://assets.leetcode.com/uploads/2021/02/19/symtree1.jpg)
Input: root = [1,2,2,3,4,4,3] Output: true
Example 2:
![Symmetric Tree LeetCode Programming Solutions | LeetCode Problem Solutions in C++, Java, & Python [💯Correct] 3 symtree2](https://assets.leetcode.com/uploads/2021/02/19/symtree2.jpg)
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
Symmetric Tree– LeetCode Solutions
Symmetric Tree Solution in C++:
class Solution { public: bool isSymmetric(TreeNode* root) { return isSymmetric(root, root); } private: bool isSymmetric(TreeNode* p, TreeNode* q) { if (!p || !q) return p == q; return p->val == q->val && isSymmetric(p->left, q->right) && isSymmetric(p->right, q->left); } };
Symmetric Tree Solution in Java:
class Solution { public boolean isSymmetric(TreeNode root) { return isSymmetric(root, root); } private boolean isSymmetric(TreeNode p, TreeNode q) { if (p == null || q == null) return p == q; return p.val == q.val && isSymmetric(p.left, q.right) && isSymmetric(p.right, q.left); } }
Symmetric Tree Solution in Python:
class Solution: def isSymmetric(self, root: Optional[TreeNode]) -> bool: def isSymmetric(p: Optional[TreeNode], q: Optional[TreeNode]) -> bool: if not p or not q: return p == q return p.val == q.val and \ isSymmetric(p.left, q.right) and \ isSymmetric(p.right, q.left) return isSymmetric(root, root)
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