diff options
Diffstat (limited to 'other/min_abs_diff_bst.cpp')
-rw-r--r-- | other/min_abs_diff_bst.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/other/min_abs_diff_bst.cpp b/other/min_abs_diff_bst.cpp new file mode 100644 index 0000000..0c0ef82 --- /dev/null +++ b/other/min_abs_diff_bst.cpp @@ -0,0 +1,27 @@ +// 530. Minimum Absolute Difference in BST +#include "leetcode.h" + +/* + * given the 'root' of a binary search tree (bst), return the minimum absolute + * difference between the values of any two different nodes in the tree + */ + +class Solution { + int diff = INT_MAX; + TreeNode *prev = NULL; + void dfs(TreeNode *root) { + if (root->left) + dfs(root->left); + if (prev) + diff = min(diff, abs(prev->val - root->val)); + prev = root; + if (root->right) + dfs(root->right); + } + +public: + int getMinimumDifference(TreeNode *root) { + dfs(root); + return diff; + } +}; |