摘要:
A character string is said to have period k if it can be formed by concatenating one or more repetitions of another string of length k. For example, t 阅读全文
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There are n pictures delivered for the new exhibition. The i-th painting has beauty ai. We know that a visitor becomes happy every time he passes from 阅读全文
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这道题想了小半天,后来经过大神指点后思路终于通了。 Hello everyone ,welcome to our programming match. This is your first task!!An organic compound is any member of a large clas 阅读全文
摘要:
Some DNA sequences exist in circular forms as in the following figure, which shows a circular sequence ``CGAGTCAGCT", that is, the last symbol ``T" in 阅读全文