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Do you know what is called ``Coprime Sequence''? That is a sequence consists of nnpositive integers, and the GCD (Greatest Common Divisor) of them is 阅读全文
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Harmonic Number In mathematics, the nth harmonic number is the sum of the reciprocals of the first n natural numbers: In this problem, you are given n 阅读全文
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Palindrome Function As we all know,a palindrome number is the number which reads the same backward as forward,such as 666 or 747.Some numbers are not 阅读全文
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算法描述：设字符串T，长度为n，字符串S，长度为m。在线性时间内求出T的每一个后缀所对应S的最长前缀。 假设T=“AAAAB”,S="AAAA"。 阅读全文