Symmetric Tree

Med
Code
Loading editor...
Tap Analyze to see visualization
Variables

Run code to see variables

Output

Console output will appear here

Press Space to start•← → to step•? all shortcuts

Solution Guide: Symmetric Tree

Approach

Compare two opposite branches recursively and ensure each pair of nodes mirrors value and structure.

Complexity Analysis

Time
O(n) where n is node count
Space
O(h) where h is tree height

Pattern

Tree Symmetry Check

Why It Works

A tree is symmetric only if left subtree and right subtree are mirror images at every level.

Updated Feb 2026