Package g1301_1400.s1315_sum_of_nodes_with_even_valued_grandparent

Class Solution

java.lang.Object
g1301_1400.s1315_sum_of_nodes_with_even_valued_grandparent.Solution
public class Solution extends java.lang.Object
1315 - Sum of Nodes with Even-Valued Grandparent.

Medium

Given the root of a binary tree, return the sum of values of nodes with an even-valued grandparent. If there are no nodes with an even-valued grandparent , return 0.

A grandparent of a node is the parent of its parent if it exists.

Example 1:

Input: root = [6,7,8,2,7,1,3,9,null,1,4,null,null,null,5]

Output: 18

Explanation: The red nodes are the nodes with even-value grandparent while the blue nodes are the even-value grandparents.

Example 2:

Input: root = [1]

Output: 0

Constraints:

  • The number of nodes in the tree is in the range [1, 104].
  • 1 <= Node.val <= 100

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    sumEvenGrandparent(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

    • sumEvenGrandparent

      public int sumEvenGrandparent(TreeNode root)