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 java.lang.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
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.util.List<java.lang.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 java.util.List<java.lang.Double> averageOfLevels(TreeNode root)