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khalashvitalii
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Vitalii Khalash
khalashvitalii
Ukraine
Ukraine
Joined Sep 28, 2023
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khalashvitalii solved problem Divide into 2 groups (#11339) on first attempt3 days ago
khalashvitalii solved problem Four-digit Armstrong numbers (#8642) on 2 attempt4 days ago
khalashvitalii solved problem Olympiad in Hogwarts (#4857) on 2 attempt4 days ago
khalashvitalii has joined contest Educational Round #24 days ago
khalashvitalii solved problem Egypt (#1265) on 13 attempt5 days ago
khalashvitalii has joined contest Educational Round #15 days ago