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Problem DescriptionThe inversion number of a given number sequence a1, a2, ..., an is the number of pairs (ai, aj) that satisfy i aj.... 阅读全文
posted @ 2015-03-28 23:00
Herumw
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摘要：
Problem DescriptionThis is a simple question, give you a triangle, please divide the triangle into two parts with a segment.These two ... 阅读全文
posted @ 2015-03-28 20:02
Herumw
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