public class Solution
extends Object
199 - Binary Tree Right Side View\.
Medium
Given the `root` of a binary tree, imagine yourself standing on the **right side** of it, return _the values of the nodes you can see ordered from top to bottom_.
**Example 1:**
**Input:** root = [1,2,3,null,5,null,4]
**Output:** [1,3,4]
**Example 2:**
**Input:** root = [1,null,3]
**Output:** [1,3]
**Example 3:**
**Input:** root = []
**Output:** []
**Constraints:**
* The number of nodes in the tree is in the range `[0, 100]`.
* `-100 <= Node.val <= 100`