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Description Description 给定长度为n的正整数序列a1,a2,…,an。 令sum=ab1+ab2+…+abm，并且满足：ab1<ab2<…<abm；b1<b2<…<bm;1<=m<=n。 求最大的sum。 n<=1000,0<ai<=109 给定长度为n的正整数序列a1,a2 阅读全文
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Description Description Company A has N employees, this company has lots of departments around the country. The employees who belong to different depa 阅读全文
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Description Description The company have n(n<=100) long cables（the length is not necessarily the same）,we assume that the length of every long cable i 阅读全文
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Description Description Children are taught to add multi-digit numbers from right-to-left one digit at a time. Many find the "carry" operation - in wh 阅读全文