# Dataset splits

- Train: `easy/`, `medium/`, and `hard/` at this dataset root; 1000 cases each.
- IID validation: `validation/`; 25 cases per difficulty and 75 total.
- Fixed OOD challenge: `ood/`; one original Task 3 example per difficulty and 3 total.
- Train master seed: `20260808`.
- IID validation master seed: `520260808`.
- IID validation excludes all 3000 train seeds and all 3000 train canonical arrangement signatures.