problem226

README

< Previous 　　　　　　　　　　　　　　　　 Next >

226. Invert Binary Tree (Easy)

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: []

 

Constraints:

• The number of nodes in the tree is in the range [0, 100].
• -100 <= Node.val <= 100

Related Topics

[Tree] [Depth-First Search] [Breadth-First Search] [Binary Tree]

Documentation

Index

• type TreeNode

Types

type TreeNode

type TreeNode = kit.TreeNode

TreeNode - Definition for a binary tree node.