| Subtask no. | Testdata Range | Constraints | Score |
|---|---|---|---|
| 1 | 0~7 | 範例測資 | 0 / 0 |
| 2 | 0, 8~12 | $X_i = 0$ | 0 / 0 |
| 3 | 1, 13~17 | $X_i = 1$ | 0 / 0 |
| 4 | 2, 18~22 | $X_i = 2$ | 1 / 1 |
| 5 | 3, 23~27 | $X_i = 3$ | 0 / 2 |
| 6 | 4, 28~32 | $X_i = 4$ | 0 / 2 |
| 7 | 5, 33~37 | $X_i = 5$ | 2 / 2 |
| 8 | 0~2, 6, 8~22, 38~42 | $X_i \in \lbrace 0, 1, 2\rbrace$ | 30 / 30 |
| 9 | 0~52 | 無其他限制 | 0 / 63 |