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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
1728
Problems204
Submissions279

Rating evolution

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chyckchyryk has joined contest Blitz Round #173 дні таму
chyckchyryk has completed the contest Weekend Practice #21 and scored 100 points6 дзён таму
chyckchyryk solved problem Team Building 2 (#12411) on first attempt6 дзён таму
chyckchyryk has joined contest Weekend Practice #21 6 дзён таму
chyckchyryk solved problem Operate on Arrays (#12384) on first attempt13 дзён таму
chyckchyryk solved problem MINMEX (#12382) on first attempt13 дзён таму
chyckchyryk solved problem FindMaxLessSum (#12381) on first attempt13 дзён таму
chyckchyryk solved problem EVEN LOVE (#12380) on first attempt13 дзён таму
chyckchyryk has completed the contest KNU Student Olympiad 2026, 1 stage (Mirror) and scored 609 points13 дзён таму
chyckchyryk solved hidden problem on 4 attempt14 дзён таму
chyckchyryk solved hidden problem on first attempt14 дзён таму
chyckchyryk solved hidden problem on first attempt14 дзён таму
chyckchyryk solved hidden problem on first attempt14 дзён таму
chyckchyryk solved hidden problem on first attempt14 дзён таму
chyckchyryk solved hidden problem on first attempt14 дзён таму
chyckchyryk has joined contest KNU Student Olympiad 2026, 1 stage (Mirror) 14 дзён таму
chyckchyryk solved problem Reduce to one (#10272) on first attempt16 дзён таму
chyckchyryk has completed the contest Weekend Practice #20 and scored 385 points19 дзён таму
chyckchyryk solved problem Fruit Feast (#11161) on first attempt19 дзён таму
chyckchyryk solved problem Corona2020 (#10029) on first attempt19 дзён таму
chyckchyryk solved problem Weighing (#1993) on first attempt19 дзён таму
chyckchyryk solved problem Interval Less Query (#5084) on first attempt19 дзён таму
chyckchyryk solved problem Add All (#1228) on first attempt19 дзён таму
chyckchyryk solved problem Pair Sum Divisibility (#8548) on first attempt19 дзён таму
chyckchyryk solved problem Split (#12368) on 2 attempt20 дзён таму