On this date: there will be COCI contest in this link: http://hsin.hr/coci/ You can study for the old COCI's here: https://oj.uz/problems/source/122 Also this site has an online judge. And this is another online judge option Dmoj.ca .It will take three hours. UPD: Registrations opened. UPD: Last 1 Day.
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Auto comment: topic has been updated by Ahmet.K37 (previous revision, new revision, compare).
Auto comment: topic has been updated by Ahmet.K37 (previous revision, new revision, compare).
Where can we found the solutions for old COCI's?
You can found from this site: Official site for COCI