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chyckchyryk
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Roman Derkach
chyckchyryk
Candidate
Ukraine
Ukraine
Joined Aug 8, 2025
Achievements (54)
Hello WorldEasy StartTough NutHardmodeBeyond the LimitHalfway ThereBy a whiskerProblem SolverProblem Solver 2Sea LionSnake TamerPhoto Finish
OverviewRatingAchievements
Rating
1707
Problems224
Submissions303

Rating evolution

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chyckchyryk has completed the contest Weekend Practice #26 and scored 250 points8天前
chyckchyryk solved problem Maximum Sum (#12782) on first attempt8天前
chyckchyryk solved problem Minimum Substring Length (#12781) on 2 attempt8天前
chyckchyryk has joined contest Weekend Practice #268天前
chyckchyryk has completed the contest Weekend Practice #25 and scored no score20天前
chyckchyryk has joined contest Weekend Practice #2521天前
chyckchyryk earned achievement Specialist1个月前
chyckchyryk earned achievement Student1个月前
chyckchyryk earned achievement Explorer1个月前
chyckchyryk earned achievement Photo Finish1个月前
chyckchyryk has completed the contest Blitz Round #22 and scored no score2个月前
chyckchyryk has joined contest Blitz Round #222个月前
chyckchyryk has joined contest KPI Open 20262个月前
chyckchyryk has completed the contest Blitz Round #21 and scored 575 points3个月前
chyckchyryk solved problem Duel of Frequencies (#12467) on first attempt3个月前
chyckchyryk solved problem Echoes of the Square (#12468) on first attempt3个月前
chyckchyryk solved problem The Glitchy Robot (#12466) on first attempt3个月前
chyckchyryk solved problem The Efficient Steps (#12465) on first attempt3个月前
chyckchyryk has joined contest Blitz Round #213个月前
chyckchyryk has completed the contest Blitz Round #20 and scored no score4个月前
chyckchyryk has joined contest Blitz Round #204个月前
chyckchyryk has joined contest UOI 2026. Day 24个月前
chyckchyryk has completed the contest Blitz Round #19 and scored no score4个月前
chyckchyryk has joined contest Blitz Round #194个月前
chyckchyryk has completed the contest Blitz Round #18 and scored 700 points4个月前