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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
1764
Problems222
Submissions301
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Rating evolution

chyckchyryk has completed the contest Blitz Round #21 and scored 575 points7 日前
chyckchyryk solved problem Duel of Frequencies (#12467) on first attempt7 日前
chyckchyryk solved problem Echoes of the Square (#12468) on first attempt7 日前
chyckchyryk solved problem The Glitchy Robot (#12466) on first attempt7 日前
chyckchyryk solved problem The Efficient Steps (#12465) on first attempt7 日前
chyckchyryk has joined contest Blitz Round #217 日前
chyckchyryk has completed the contest Blitz Round #20 and scored no score20 日前
chyckchyryk has joined contest Blitz Round #2021 日前
chyckchyryk has joined contest UOI 2026. Day 229 日前
chyckchyryk has completed the contest Blitz Round #19 and scored no score1 か月前
chyckchyryk has joined contest Blitz Round #191 か月前
chyckchyryk has completed the contest Blitz Round #18 and scored 700 points2 か月前
chyckchyryk solved problem Nasser's OR Removal (#12433) on first attempt2 か月前
chyckchyryk solved problem Rufo's massive (#12430) on 5 attempt2 か月前
chyckchyryk solved problem Nasser's Prime Slices (#12432) on 5 attempt2 か月前
chyckchyryk has joined contest Blitz Round #182 か月前
chyckchyryk has completed the contest Weekend Practice #22 and scored no score2 か月前
chyckchyryk has joined contest Weekend Practice #222 か月前
chyckchyryk solved problem Sum of squares Cnk (#11271) on first attempt2 か月前
chyckchyryk solved problem City Horizon (#7747) on first attempt2 か月前
chyckchyryk solved problem Square (#7757) on first attempt2 か月前
chyckchyryk solved problem Testing System (#4416) on first attempt2 か月前
chyckchyryk solved problem Sequence (#1083) on 7 attempt2 か月前
chyckchyryk solved problem Perfect square (#8877) on first attempt2 か月前
chyckchyryk solved problem Sum and amount (#8684) on first attempt2 か月前