{"id":"modular-digit-extraction-pattern","text":"`subtract-the-product-and-sum-of-digits` extracts digits via `n % 10` / `n //= 10` loop rather than string conversion, achieving O(1) space with no string allocation","truth_value":"IN","source":"entries/2026/06/06/subtract-the-product-and-sum-of-digits-of-an-integer-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"modular-digit-extraction-pattern","truth_value":"IN","reason":"premise"}]}}