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已解決的問題：共 23 道題
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嘗試過的問題：共 4 道題
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無Virtual Participations：共 2 场比赛
| Name | Start time |
|---|---|
| (China) National Olympiad in Informatics 2025 Day 2 | 2025-07-20 08:00:00 |
| (China) National Olympiad in Informatics 2025 Day 1 | 2025-07-19 08:00:00 |