{"id":"sumzero-output-length-equals-n","text":"`sumZero(n)` always returns exactly `n` elements: `2 * (n // 2)` from pairs plus `n % 2` from the optional zero append.","truth_value":"IN","source":"entries/2026/06/06/find-n-unique-integers-sum-up-to-zero-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"sumzero-output-length-equals-n","truth_value":"IN","reason":"premise"}]}}