class Solution: def trimBST(self, root: Optional[TreeNode], low: int, high: int) -> Optional[TreeNode]: if root is None: return None if root.val < low: return self.trimBST(root.right, low, high) if root.val > high: return self.trimBST(root.left, low, high) root.left = self.trimBST(root.left...