All CEOI contests from 2005 to 2018 are now available for practice here:
You can either join a virtual contest (5 hours like the original contest) or just upsolve tasks.
| # | User | Rating |
|---|---|---|
| 1 | Benq | 3792 |
| 2 | VivaciousAubergine | 3647 |
| 3 | Kevin114514 | 3611 |
| 4 | jiangly | 3583 |
| 5 | strapple | 3515 |
| 6 | tourist | 3470 |
| 7 | Radewoosh | 3415 |
| 8 | Um_nik | 3376 |
| 9 | maroonrk | 3361 |
| 10 | XVIII | 3345 |
| # | User | Contrib. |
|---|---|---|
| 1 | Qingyu | 162 |
| 2 | adamant | 148 |
| 3 | Um_nik | 146 |
| 4 | Dominater069 | 143 |
| 5 | errorgorn | 141 |
| 6 | cry | 138 |
| 7 | Proof_by_QED | 136 |
| 8 | YuukiS | 135 |
| 9 | chromate00 | 134 |
| 10 | soullless | 133 |
All CEOI contests from 2005 to 2018 are now available for practice here:
You can either join a virtual contest (5 hours like the original contest) or just upsolve tasks.
| Name |
|---|



Are editorials of these contests available?
For some contests there are editorials available on their websites.
Oh wow, I can now test how I would have done in CEOI 2012 which I missed since it clashed with IMO xD
That's awesome!