#226
Invert Binary Tree
easy · verified · 79.9% accepted · 15,158 likes · top 91%
tree · depth-first search · breadth-first search · binary tree
Description
Given the root of a binary tree, invert the tree, and return its root.
Example 1:
Input: root = [4,2,7,1,3,6,9]
Output: [4,7,2,9,6,3,1]
Example 2:
Input: root = [2,1,3]
Output: [2,3,1]
Example 3:
Input: root = []
Output: []
Solution