Invert Binary Tree
Examples
Example 1:
Input: root = [1, 2, 3, 4, 5, 6, 7]
Output: [1, 3, 2, 7, 6, 5, 4]
Example 2:
Input: root = [3, 2, 1]
Output: [3, 1, 2]
Example 3:
Input: root = []
Output: []
Trees
Example 1:
Input: root = [1, 2, 3, 4, 5, 6, 7]
Output: [1, 3, 2, 7, 6, 5, 4]
Example 2:
Input: root = [3, 2, 1]
Output: [3, 1, 2]
Example 3:
Input: root = []
Output: []
You are given the root of a binary tree root. Invert the binary tree and return its root.
0 <= The number of nodes in the tree <= 100-100 <= Node.val <= 100