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DescriptionIf two people were born one after another with one second difference and one of them is a child, then the other one is a child too. We get ... 阅读全文
posted @ 2015-05-07 14:55
Painting、时光
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DescriptionVasya is the beginning mathematician. He decided to make an important contribution to the science and to become famous all over the world. ... 阅读全文
posted @ 2015-05-07 13:12
Painting、时光
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