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Problem DescriptionPass a year learning in Hangzhou, yifenfei arrival hometown Ningbo at finally. Leave Ningbo one year, yifenfei have many people to ... 阅读全文
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Problem DescriptionI have N precious stones, and plan to use K of them to make a necklace for my mother, but she won't accept a necklace which is too ... 阅读全文
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Problem DescriptionClarke is a patient with multiple personality disorder. One day, Clarke turned into a cook, was shopping for food. Clarke has bough... 阅读全文