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Description While walking down the street Vanya saw a label "Hide&Seek". Because he is a programmer, he used & as a bitwise AND for these two words re 阅读全文
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Description Vanya smashes potato in a vertical food processor. At each moment of time the height of the potato in the processor doesn't exceed h and t 阅读全文
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Description Vanya and his friends are walking along the fence of height h and they do not want the guard to notice them. In order to achieve this the 阅读全文