摘要：
Problem Description The inversion number of a given number sequence a1, a2, ..., an is the number of pairs (ai, aj) that satisfy i < j and ai > aj.For 阅读全文
posted @ 2016-01-28 01:52
nicetomeetu
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摘要：
In order to strengthen the defense ability, many stars in galaxy allied together and built many bidirectional tunnels to exchange messages. However, w 阅读全文
posted @ 2016-01-28 00:56
nicetomeetu
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