{"id":"first-seen-never-overwritten","text":"In `maxLengthBetweenEqualCharacters`, `first_seen[c]` is written exactly once per distinct character; subsequent occurrences take the `if` branch and compute the gap without updating the stored index.","truth_value":"IN","source":"entries/2026/06/06/largest-substring-between-two-equal-characters-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"first-seen-never-overwritten","truth_value":"IN","reason":"premise"}]}}