Longest Univalue Path
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
5
/ \
4 5
/ \ \
1 1 5Input
root = [5,4,5,1,1,null,5]Output
2The longest path with the same value consists of nodes with value 5 and has length 2.
Example 2
1
/ \
4 5
/ \ \
4 4 5Input
root = [1,4,5,4,4,null,5]Output
2The longest path with the same value consists of nodes with value 4 and has length 2.
Constraints
- The number of nodes in the tree is in the range
[0, 10^4]. -1000 <= Node.val <= 1000- The depth of the tree will not exceed
1000.