Python | Leetcode Python题解之第235题二叉搜索树的最近公共祖先

题目：

题解：

class Solution:
    def lowestCommonAncestor(self, root: TreeNode, p: TreeNode, q: TreeNode) -> TreeNode:
        ancestor = root
        while True:
            if p.val < ancestor.val and q.val < ancestor.val:
                ancestor = ancestor.left
            elif p.val > ancestor.val and q.val > ancestor.val:
                ancestor = ancestor.right
            else:
                break
        return ancestor