| Subtask no. | Testdata Range | Constraints | Score |
|---|---|---|---|
| 1 | 0 | 範例測資 | 0 / 0 |
| 2 | 0~4 | $N \leq 5$ | 0 / 5 |
| 3 | 5~6 | $X = Y = 0$ | 0 / 5 |
| 4 | 7~8 | $X > 0, Y = 0, X = N - 1$ | 0 / 10 |
| 5 | 9~10 | $X > 0, Y = 0, X = N - 2$ | 0 / 11 |
| 6 | 7~20 | $X > 0, Y = 0$ | 0 / 12 |
| 7 | 7~8, 21~30 | $X > 0, Y \geq 0, X + Y = N - 1$ | 0 / 18 |
| 8 | 9~10, 31~40 | $X > 0, Y \geq 0, X + Y = N - 2$ | 0 / 19 |
| 9 | 0~60 | 無額外限制 | 0 / 20 |