{"id":"in-place-mutation-return-convention","text":"Multiple solutions (flood-fill, flipping-an-image) mutate the input data structure in-place and return the same reference, following LeetCode's convention where the caller already holds the reference.","truth_value":"IN","source":"entries/2026/06/06/flipping-an-image-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":["in-place-mutation-with-return-convention"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"in-place-mutation-return-convention","truth_value":"IN","reason":"premise"}]}}