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.
CEOI Contest Collection
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.