{"id":"k-length-apart-sentinel-minus-one","text":"`kLengthApart` initializes `last = -1` as a sentinel so the first 1 encountered never triggers a gap violation, avoiding a separate boolean flag.","truth_value":"IN","source":"entries/2026/06/06/check-if-all-1s-are-at-least-length-k-places-away-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":["sentinel-initialization-encodes-boundary-conditions"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"k-length-apart-sentinel-minus-one","truth_value":"IN","reason":"premise"}]}}