GoalScope — is_bst (Qwen2.5-Coder-32B-Instruct) — hover a token to see the patched verbalization
<code>↵ def is_bst(root):↵ """Helper function to validate BST."""↵ def validate(node, low=float(\'-inf\'), high=float(\'inf\')):↵ if not node:↵ return True if node.val <= low or node.val >= high:↵ return False return (validate(node.left, low, node.val) and validate(node.right, node.val, high))↵ return validate(root)↵ </code>