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| Name | Start time |
|---|---|
| (China) National Olympiad in Informatics 2025 Day 2 | 2025-07-20 10:51:27 |
| (China) National Olympiad in Informatics 2025 Day 1 | 2025-07-19 09:56:26 |
| (China) National Olympiad in Informatics 2024 Day 2 | 2024-08-03 09:45:15 |
| (China) National Olympiad in Informatics 2024 Day 1 | 2024-07-31 10:09:08 |