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chyckchyryk
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Roman Derkach
chyckchyryk
Ukraine
Ukraine
Joined Nov 3, 2025
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Problems7
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2025
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2026
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chyckchyryk has joined contest UOI 2023. Day 14 months ago
chyckchyryk solved problem Мобільна гра (#475) on first attempt5 months ago
chyckchyryk solved problem Множини (#476) on 2 attempt5 months ago
chyckchyryk solved problem Дивний сон (#474) on 2 attempt5 months ago
chyckchyryk solved problem Конструктор (#472) on first attempt5 months ago
chyckchyryk solved problem Матричка (#470) on 2 attempt5 months ago
chyckchyryk solved problem Прямокутник (#468) on first attempt5 months ago
chyckchyryk solved problem Борги (#467) on first attempt5 months ago
chyckchyryk has joined contest UOI 2026. I stage5 months ago