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chyckchyryk
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Roman Derkach
chyckchyryk
Candidate
Ukraine
Ukraine
Joined Aug 8, 2025
Achievements (2)
Problem Solver 2Problem Solver
OverviewRatingAchievementsPosts
Rating
1749
Problems207
Submissions282
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Rating evolution

chyckchyryk has joined contest Educational Round #101 day ago
chyckchyryk has completed the contest Blitz Round #17 and scored 575 points2 days ago
chyckchyryk solved problem Majestic Numbers (#12419) on 3 attempt2 days ago
chyckchyryk solved problem ILOVEPRODUCT (#12422) on 3 attempt2 days ago
chyckchyryk solved problem 67 in 2026? (#12418) on first attempt2 days ago
chyckchyryk has joined contest Blitz Round #176 days ago
chyckchyryk has completed the contest Weekend Practice #21 and scored 100 points9 days ago
chyckchyryk solved problem Team Building 2 (#12411) on first attempt9 days ago
chyckchyryk has joined contest Weekend Practice #21 9 days ago
chyckchyryk solved problem Operate on Arrays (#12384) on first attempt16 days ago
chyckchyryk solved problem MINMEX (#12382) on first attempt16 days ago
chyckchyryk solved problem FindMaxLessSum (#12381) on first attempt16 days ago
chyckchyryk solved problem EVEN LOVE (#12380) on first attempt16 days ago
chyckchyryk has completed the contest KNU Student Olympiad 2026, 1 stage (Mirror) and scored 609 points16 days ago
chyckchyryk solved hidden problem on 4 attempt17 days ago
chyckchyryk solved hidden problem on first attempt17 days ago
chyckchyryk solved hidden problem on first attempt17 days ago
chyckchyryk solved hidden problem on first attempt17 days ago
chyckchyryk solved hidden problem on first attempt17 days ago
chyckchyryk solved hidden problem on first attempt17 days ago
chyckchyryk has joined contest KNU Student Olympiad 2026, 1 stage (Mirror) 17 days ago
chyckchyryk solved problem Reduce to one (#10272) on first attempt19 days ago
chyckchyryk has completed the contest Weekend Practice #20 and scored 385 points22 days ago
chyckchyryk solved problem Fruit Feast (#11161) on first attempt23 days ago
chyckchyryk solved problem Corona2020 (#10029) on first attempt23 days ago