Package g0601_0700.s0637_average_of_levels_in_binary_tree

Class Solution

java.lang.Object

g0601_0700.s0637_average_of_levels_in_binary_tree.Solution

public class Solution
extends Object

637 - Average of Levels in Binary Tree.<p>Easy</p> <p>Given the <code>root</code> of a binary tree, return <em>the average value of the nodes on each level in the form of an array</em>. Answers within <code>10^-5</code> of the actual answer will be accepted.</p> <p><strong>Example 1:</strong></p> <p><img src="https://assets.leetcode.com/uploads/2021/03/09/avg1-tree.jpg" alt="" /></p> <p><strong>Input:</strong> root = [3,9,20,null,null,15,7]</p> <p><strong>Output:</strong> [3.00000,14.50000,11.00000] Explanation: The average value of nodes on level 0 is 3, on level 1 is 14.5, and on level 2 is 11. Hence return [3, 14.5, 11].</p> <p><strong>Example 2:</strong></p> <p><img src="https://assets.leetcode.com/uploads/2021/03/09/avg2-tree.jpg" alt="" /></p> <p><strong>Input:</strong> root = [3,9,20,15,7]</p> <p><strong>Output:</strong> [3.00000,14.50000,11.00000]</p> <p><strong>Constraints:</strong></p> <ul> <li>The number of nodes in the tree is in the range <code>[1, 10⁴]</code>.</li> <li><code>-2³¹ <= Node.val <= 2³¹ - 1</code></li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
List<Double>	averageOfLevels(TreeNode root)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

averageOfLevels

public List<Double> averageOfLevels(TreeNode root)