DaleStudy · jamiebase · May 23, 2026 · May 26, 2026 · May 26, 2026 · May 26, 2026
diff --git a/lowest-common-ancestor-of-a-binary-search-tree/jamiebase.py b/lowest-common-ancestor-of-a-binary-search-tree/jamiebase.py
@@ -0,0 +1,22 @@
+"""
+# Approach
+BST 의 특징을 이용해서 값의 대소 비교로 공통 조상을 찾습니다.
+
+# Complexity
+- Time complexity: 트리의 높이 H일때, O(H)
+- Space complexity: O(1)
+"""
+
+
+class Solution:
+    def lowestCommonAncestor(
+        self, root: "TreeNode", p: "TreeNode", q: "TreeNode"
+    ) -> "TreeNode":
+        cur = root
+        while cur:
+            if p.val < cur.val and q.val < cur.val:
+                cur = cur.left
+            elif p.val > cur.val and q.val > cur.val:
+                cur = cur.right
+            else:
+                return cur