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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
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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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2026
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Rating evolution

chyckchyryk has joined contest USACO 2015 January2 дні таму
chyckchyryk has completed the contest Weekend Practice #26 and scored 250 points11 дзён таму
chyckchyryk solved problem Maximum Sum (#12782) on first attempt11 дзён таму
chyckchyryk solved problem Minimum Substring Length (#12781) on 2 attempt11 дзён таму
chyckchyryk has joined contest Weekend Practice #2611 дзён таму
chyckchyryk has completed the contest Weekend Practice #25 and scored no score23 дні таму
chyckchyryk has joined contest Weekend Practice #2524 дні таму
chyckchyryk earned achievement Specialist1 месяц таму
chyckchyryk earned achievement Student1 месяц таму
chyckchyryk earned achievement Explorer1 месяц таму
chyckchyryk earned achievement Photo Finish1 месяц таму
chyckchyryk has completed the contest Blitz Round #22 and scored no score2 месяцы таму
chyckchyryk has joined contest Blitz Round #222 месяцы таму
chyckchyryk has joined contest KPI Open 20262 месяцы таму
chyckchyryk has completed the contest Blitz Round #21 and scored 575 points3 месяцы таму
chyckchyryk solved problem Duel of Frequencies (#12467) on first attempt3 месяцы таму
chyckchyryk solved problem Echoes of the Square (#12468) on first attempt3 месяцы таму
chyckchyryk solved problem The Glitchy Robot (#12466) on first attempt3 месяцы таму
chyckchyryk solved problem The Efficient Steps (#12465) on first attempt3 месяцы таму
chyckchyryk has joined contest Blitz Round #213 месяцы таму
chyckchyryk has completed the contest Blitz Round #20 and scored no score4 месяцы таму
chyckchyryk has joined contest Blitz Round #204 месяцы таму
chyckchyryk has joined contest UOI 2026. Day 24 месяцы таму
chyckchyryk has completed the contest Blitz Round #19 and scored no score4 месяцы таму
chyckchyryk has joined contest Blitz Round #194 месяцы таму