{"id":"palindrome-ll-o1-space-via-mutation","text":"`isPalindrome` achieves O(1) extra space by mutating the list in-place (fast/slow pointer to find midpoint, then in-place reversal) rather than copying values to an array","truth_value":"IN","source":"entries/2026/06/06/palindrome-linked-list-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":["palindrome-reversal-adapts-across-data-domains"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"palindrome-ll-o1-space-via-mutation","truth_value":"IN","reason":"premise"}]}}