{"id":"python-stdlib-preferred-over-manual-algorithms","text":"Solutions systematically delegate computation to Python standard library abstractions — str() for digit extraction, Counter for frequency counting, set for deduplication, bin().count() for popcount — rather than implementing equivalent arithmetic or bitwise logic manually.","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[{"type":"SL","antecedents":["string-over-arithmetic-for-digit-ops","counter-universal-frequency-primitive"],"outlist":[],"label":"both patterns reflect the same principle: prefer a well-tested stdlib abstraction over a hand-rolled equivalent, trading minor performance for readability and correctness confidence"}],"dependents":["stdlib-delegation-safe-under-input-contracts","stdlib-reinforces-exactness"],"metadata":{"last_reviewed":"2026-06-07T22:02:22","review_result":"insufficient"},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"python-stdlib-preferred-over-manual-algorithms","truth_value":"IN","reason":"SL justification valid","antecedents":["string-over-arithmetic-for-digit-ops","counter-universal-frequency-primitive"],"label":"both patterns reflect the same principle: prefer a well-tested stdlib abstraction over a hand-rolled equivalent, trading minor performance for readability and correctness confidence"},{"node":"string-over-arithmetic-for-digit-ops","truth_value":"IN","reason":"SL justification valid","antecedents":["str-conversion-digit-extraction-idiom","string-based-digit-check-idiom","digit-sum-via-str-conversion","bin-count-for-popcount"],"label":"String conversion is the universal digit-decomposition idiom, chosen for readability over performance"},{"node":"str-conversion-digit-extraction-idiom","truth_value":"IN","reason":"premise"},{"node":"string-based-digit-check-idiom","truth_value":"IN","reason":"premise"},{"node":"digit-sum-via-str-conversion","truth_value":"IN","reason":"premise"},{"node":"bin-count-for-popcount","truth_value":"IN","reason":"premise"},{"node":"counter-universal-frequency-primitive","truth_value":"IN","reason":"SL justification valid","antecedents":["counter-dominant-frequency-tool","counter-pattern-dominates-frequency-problems","counter-missing-key-returns-zero","counter-subtraction-drops-nonpositive"],"label":"Counter's built-in semantics eliminate boilerplate that manual dicts would require"},{"node":"counter-dominant-frequency-tool","truth_value":"IN","reason":"premise"},{"node":"counter-pattern-dominates-frequency-problems","truth_value":"IN","reason":"premise"},{"node":"counter-missing-key-returns-zero","truth_value":"IN","reason":"premise"},{"node":"counter-subtraction-drops-nonpositive","truth_value":"IN","reason":"premise"}]}}