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Vitaly is a diligent student who never missed a lesson in his five years of studying in the university. He always does his homework on... 阅读全文
posted @ 2015-04-09 21:11
Herumw
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摘要：
Anya has bought a new smartphone that uses Berdroid operating system. The smartphone menu has exactly n applications, each application... 阅读全文
posted @ 2015-04-09 17:08
Herumw
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