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happy_rubin_702
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Михайло Михайлович Щерецький
happy_rubin_702
Joined Apr 7, 2026
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happy_rubin_702 solved problem Sum of squares Cnk (#11271) on first attempt19 days ago
happy_rubin_702 solved problem Perfect square (#8877) on first attempt19 days ago
happy_rubin_702 solved problem Sum and amount (#8684) on first attempt19 days ago
happy_rubin_702 has joined contest Educational Round #1019 days ago