| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 550 | DEMC109 DE-MC-109 100行中5行无效,剩余中有10行被去重删除,最终保留行数? | 0 / 0 | 2 | |
| 630 | DEMC189 DE-MC-189 120行先删除8行无效,再删除12行重复冗余,剩余? | 0 / 0 | 2 |
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