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Problem A sequence is an ordered collection of objects (usually numbers), which are allowed to repeat. Sequences can be finite or infinite. Two exampl 阅读全文
摘要：
Problem In DNA strings, symbols 'A' and 'T' are complements of each other, as are 'C' and 'G'. The reverse complement of a DNA string ss is the string 阅读全文
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Problem An RNA string is a string formed from the alphabet containing 'A', 'C', 'G', and 'U'. Given a DNA string tt corresponding to a coding strand, 阅读全文
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Problem A string is simply an ordered collection of symbols selected from some alphabet and formed into a word; the length of a string is the number o 阅读全文