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chyckchyryk
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Roman Derkach
chyckchyryk
Candidate
Ukraine
Ukraine
Joined Aug 8, 2025
OverviewRatingPosts
Rating
1743
Problems81
Submissions87
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Rating evolution

chyckchyryk solved problem Without the middle (#945) on first attempt2 days ago
chyckchyryk solved problem Divide into 2 groups (#11339) on 2 attempt3 days ago
chyckchyryk solved problem Infinite Sequence - 2 (#1212) on 4 attempt3 days ago
chyckchyryk solved problem Olympiad in Hogwarts (#4857) on first attempt3 days ago
chyckchyryk solved problem Meet in the middle (#11431) on 3 attempt3 days ago
chyckchyryk solved problem Four-digit Armstrong numbers (#8642) on first attempt3 days ago
chyckchyryk solved problem Egypt (#1265) on first attempt3 days ago
chyckchyryk has joined contest Educational Round #13 days ago
chyckchyryk has completed the contest Blitz Round #7 and scored 925 points4 days ago
chyckchyryk solved problem Sliding Values (#12284) on 6 attempt5 days ago
chyckchyryk solved problem Max Trace (#12280) on 2 attempt5 days ago
chyckchyryk solved problem MOAGEZA is cooking (#12283) on first attempt5 days ago
chyckchyryk solved problem GCD What (#12282) on first attempt5 days ago
chyckchyryk solved problem Haidora and suspicious formula (#12281) on first attempt5 days ago
chyckchyryk has joined contest Blitz Round #75 days ago
chyckchyryk solved problem New-year tree (#23) on 7 attempt10 days ago
chyckchyryk solved problem Queen Move (#1417) on first attempt12 days ago
chyckchyryk solved problem Milling machines (#7714) on first attempt12 days ago
chyckchyryk solved problem K-th Gutab (#11460) on 19 attempt12 days ago
chyckchyryk solved problem Moortal Cowmbat (#10292) on first attempt12 days ago
chyckchyryk solved problem Jim and the Skyscrapers (#11720) on 2 attempt12 days ago
chyckchyryk solved problem Linear network (#10455) on 4 attempt12 days ago
chyckchyryk solved problem Quadratic equation (#911) on first attempt12 days ago
chyckchyryk has joined contest Educational Round #518 days ago
chyckchyryk has completed the contest Blitz Round #6 and scored 300 points18 days ago