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| Name | Start time |
|---|---|
| (China) National Olympiad in Informatics 2021 Day 1 | 2025-07-06 14:30:34 |
| (China) National Olympiad in Informatics 2023 Day 2 | 2025-06-29 14:20:03 |
| (China) National Olympiad in Informatics 2023 Day 1 | 2025-06-26 12:36:38 |
| (China) National Olympiad in Informatics 2024 Day 1 | 2025-06-19 15:27:10 |
| (China) National Olympiad in Informatics 2022 Day 2 | 2025-06-18 07:47:15 |
| (China) National Olympiad in Informatics 2022 Day 1 | 2025-06-15 16:40:18 |