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chyckchyryk
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Roman Derkach
chyckchyryk
Candidate
Ukraine
Ukraine
Joined Aug 8, 2025
Achievements (1)
Problem Solver
OverviewRatingAchievementsPosts
Rating
1708
Problems106
Submissions161
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2021
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2022
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2023
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2024
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2025
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Rating evolution

chyckchyryk has completed the contest Blitz Round #10 and scored 465 points3 giờ trước
chyckchyryk has joined contest Educational Round #64 giờ trước
chyckchyryk solved hidden problem on 3 attempt5 giờ trước
chyckchyryk solved hidden problem on 2 attempt5 giờ trước
chyckchyryk solved hidden problem on first attempt6 giờ trước
chyckchyryk solved hidden problem on first attempt6 giờ trước
chyckchyryk has joined contest Blitz Round #1022 giờ trước
chyckchyryk has completed the contest Weekend Practice #16 and scored 280 points7 ngày trước
chyckchyryk solved problem Skyline (#12306) on first attempt7 ngày trước
chyckchyryk solved problem Recover the array (#12305) on first attempt7 ngày trước
chyckchyryk has joined contest Weekend Practice #167 ngày trước
chyckchyryk solved problem Akbar teacher (#12290) on 2 attempt14 ngày trước
chyckchyryk solved problem Pasha and permutations (#12294) on first attempt14 ngày trước
chyckchyryk solved problem Captain Jack Sparrow (#12293) on first attempt14 ngày trước
chyckchyryk solved problem Hard Game (#12292) on first attempt14 ngày trước
chyckchyryk solved problem Good array (#12291) on first attempt14 ngày trước
chyckchyryk solved problem Majestic Segments (#12301) on 5 attempt14 ngày trước
chyckchyryk solved problem Reset bits (#1647) on 3 attempt18 ngày trước
chyckchyryk solved problem Change the one (#1612) on first attempt18 ngày trước
chyckchyryk solved problem Bitwise Equations (#1550) on first attempt18 ngày trước
chyckchyryk has completed the contest Weekend Practice #15 and scored 235 points21 ngày trước
chyckchyryk solved problem Tall Building (#12300) on first attempt21 ngày trước
chyckchyryk has joined contest Weekend Practice #1523 ngày trước
chyckchyryk has joined contest Blitz Round #927 ngày trước
chyckchyryk solved problem Rectangle (#769) on 2 attempt28 ngày trước