| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 400 | P400 對錯系列 -- 倍數關係 | 0 / 0 | (None) | |
| 409 | P409 對錯系列 -- 閏年判斷 | 0 / 0 | (None) |
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