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.

Easy

Given the root of a binary tree, return the average value of the nodes on each level in the form of an array. Answers within 10-5 of the actual answer will be accepted.

Example 1:

Input: root = [3,9,20,null,null,15,7]

Output: [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].

Example 2:

Input: root = [3,9,20,15,7]

Output: [3.00000,14.50000,11.00000]

Constraints:

• The number of nodes in the tree is in the range [1, 104].
• -231 <= Node.val <= 231 - 1

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and 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 Detail

Solution

public Solution()

Method Detail

averageOfLevels

public List<Double> averageOfLevels(TreeNode root)