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-rw-r--r--other/max_diff_node_ancestor.cpp22
1 files changed, 22 insertions, 0 deletions
diff --git a/other/max_diff_node_ancestor.cpp b/other/max_diff_node_ancestor.cpp
new file mode 100644
index 0000000..ab96947
--- /dev/null
+++ b/other/max_diff_node_ancestor.cpp
@@ -0,0 +1,22 @@
+#include "leetcode.h"
+
+class Solution {
+public:
+ int diff = INT_MIN;
+ int maxAncestorDiff(TreeNode *root) {
+ if (!root)
+ return 0;
+ int mx = INT_MIN, mn = INT_MAX;
+ getMax(root, mx, mn);
+ return diff;
+ }
+
+private:
+ int getMax(TreeNode *root, int mx, int mn) {
+ mx = max(mx, root->val);
+ mn = min(mn, root->val);
+ diff = max(diff, mx - mn);
+ getMax(root->left, mx, mn);
+ getMax(root->right, mx, mn);
+ }
+};