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| Name | Start time |
|---|---|
| (China) National Olympiad in Informatics 2021 Day 2 | 2025-07-06 14:34:38 |
| (China) National Olympiad in Informatics 2021 Day 1 | 2025-07-05 12:43:18 |
| (China) National Olympiad in Informatics 2024 Day 2 | 2025-06-26 12:37:17 |
| (China) National Olympiad in Informatics 2024 Day 1 | 2025-06-19 15:00:25 |
| (China) National Olympiad in Informatics 2022 Day 2 | 2025-06-18 07:47:10 |