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Lev_ruban1
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Lev
Lev_ruban1
Ukraine
Ukraine
Joined Jan 1, 1
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Lev_ruban1 solved problem Catamarans (#381) on 2 attempt3 months ago
Lev_ruban1 has joined contest UOI 2025. III stage. Day 23 months ago
Lev_ruban1 solved problem Філателія (#355) on 4 attempt5 months ago
Lev_ruban1 has joined contest UOI 2025. II stage. Kharkiv5 months ago
Lev_ruban1 has joined contest UOI 2024. III stage. Day 18 months ago
Lev_ruban1 has joined contest UOI 2013. III stage. Day 11 year ago