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Problem description Mad scientist Mike entertains himself by arranging rows of dominoes. He doesn't need dominoes, though: he uses rectangular magnets 阅读全文
posted @ 2018-06-10 07:53
霜雪千年
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Problem description Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent a 阅读全文
posted @ 2018-06-10 07:48
霜雪千年
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