leetcode_687. Longest Univalue Path ? 待解决
2017-11-24 09:56
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Given a binary tree, find 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.
Note: The length of path between two nodes is represented by the number of edges between them.
Example 1:
Input:
Output:
2
Example 2:
Input:
Output:
2
Note: The given binary tree has not more than 10000 nodes. The height of the tree is not more than 1000.
提示：提交代码后，需要用简洁的语言解释一下代码思路~ 谢谢
历史题目和总结见公众号「每日一道算法题」
https://leetcode.com/problems/longest-univalue-path/description/
思路：
Note: The length of path between two nodes is represented by the number of edges between them.
Example 1:
Input:
5 / \ 4 5 / \ \ 1 1 5
Output:
2
Example 2:
Input:
1 / \ 4 5 / \ \ 4 4 5
Output:
2
Note: The given binary tree has not more than 10000 nodes. The height of the tree is not more than 1000.
提示：提交代码后，需要用简洁的语言解释一下代码思路~ 谢谢
历史题目和总结见公众号「每日一道算法题」
https://leetcode.com/problems/longest-univalue-path/description/
思路：
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