GitBook: [greyireland#46] No subject

zhangzz2015 · Jan 14, 2022 · 57ea9be · 57ea9be
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commit 57ea9be
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diff --git a/data_structure/binary_tree.md b/data_structure/binary_tree.md
@@ -1093,6 +1093,8 @@ func helper(root *TreeNode) ResultType {
 
 #### [Find Mode in Binary Search Tree](https://leetcode.com/problems/find-mode-in-binary-search-tree/)
 
+> 方法：利用BST中序遍历特点，找到相同数计数。
+
 ```cpp
 // Some code
 class Solution {