Package g0601_0700.s0687_longest_univalue_path

Class Solution

java.lang.Object
g0601_0700.s0687_longest_univalue_path.Solution
public class Solution extends java.lang.Object
687 - Longest Univalue Path.

Medium

Given the root of a binary tree, return the length of the longest path, where each node in the path has the same value. This path may or may not pass through the root.

The length of the path between two nodes is represented by the number of edges between them.

Example 1:

Input: root = [5,4,5,1,1,5]

Output: 2

Example 2:

Input: root = [1,4,5,4,4,5]

Output: 2

Constraints:

  • The number of nodes in the tree is in the range [0, 104].
  • -1000 <= Node.val <= 1000
  • The depth of the tree will not exceed 1000.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    longestUnivaluePath(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

    • longestUnivaluePath

      public int longestUnivaluePath(TreeNode root)