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题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=1124 Problem Description The most important part of a GSM network is so called Base Transceiver Station 阅读全文
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方法一：假设N！=K*10M，K不能被10整除，那么N！尾数就有M个0。再对N！进行质因子分解：N！=2x*3y*5z...由于10=2*5，即每一对2和5相乘都可以得到1个0，所以M只与指数x、z有关，并且M=min(x,z)（x，z分别为N！的中因子2，因子5的个数）。因为N！中每两个数字就有一 阅读全文
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Description Every morning when they are milked, the Farmer John's cows form a rectangular grid that is R (1 <= R <= 10,000) rows by C (1 <= C <= 75) c 阅读全文
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Description The little cat is so famous, that many couples tramp over hill and dale to Byteland, and asked the little cat to give names to their newly 阅读全文
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Problem Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Ouli 阅读全文
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题目描述 We consider a positive integer perfect, if and only if it is equal to the sum of its positive divisors less than itself. For example, 6 is perfec 阅读全文
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题目描述 In mathematics, matrix multiplication or matrix product is a binary operation that produces a matrix from two matrices with entries in a field, o 阅读全文
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Description You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of operation is to add some given number to 阅读全文
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Problem Description In the game of DotA, Pudge’s meat hook is actually the most horrible thing for most of the heroes. The hook is made up of several 阅读全文
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Problem Description Pass a year learning in Hangzhou, yifenfei arrival hometown Ningbo at finally. Leave Ningbo one year, yifenfei have many people to 阅读全文