{"id":"climbing-stairs-no-input-validation","text":"`climbStairs` does not guard against `n <= 0`; passing 0 returns 0, and negative values return the negative input — both incorrect but outside the LeetCode contract `1 <= n <= 45`.","truth_value":"IN","source":"entries/2026/06/06/climbing-stairs-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"climbing-stairs-no-input-validation","truth_value":"IN","reason":"premise"}]}}