| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 1789 | P1027 [NOIP2001 提高组] Car 的旅行路线 | 0 / 0 | (None) | |
| 1800 | P1038 [NOIP2003 提高组] 神经网络 | 0 / 1 | 10 | |
| 1915 | P2661 [NOIP2015 提高组] 信息传递 | 1 / 1 | 10 | |
| 1923 | P2680 [NOIP2015 提高组] 运输计划 | 0 / 3 | 10 | |
| 1980 | P7113 [NOIP2020] 排水系统 | 1 / 2 | 10 |
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