Herumw - 博客园

摘要： 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 阅读(135) 评论(0) 推荐(0)

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 阅读(277) 评论(0) 推荐(0)

摘要： Pasha got a very beautiful string s for his birthday, the string consists of lowercase Latin letters. The letters in the string are nu... 阅读全文

posted @ 2015-03-27 20:04 Herumw 阅读(176) 评论(0) 推荐(0)

摘要： Description There is an integer sequence withN integers. You can use 1 unit of cost to increase any integer in the sequence by 1. ... 阅读全文

posted @ 2015-03-27 16:45 Herumw 阅读(111) 评论(0) 推荐(0)

摘要： Description The functionf(n, k) is defined by f(n, k) = 1k + 2k + 3k +...+nk. If you know the value of n and k, could you tell us t... 阅读全文

posted @ 2015-03-26 20:22 Herumw 阅读(150) 评论(0) 推荐(0)

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