摘要：Problem DescriptionIn the game of DotA, Pudge’s meat hook is actually the most horrible thing for most of the heroes. The hook is made... 阅读全文

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

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

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

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

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