It's well known that DNA Sequence is a sequence only contains A, C, T and G, and it's very useful to analyze a segment of DNA Sequence,For example, if a animal's DNA sequence contains segment ATC then it may mean that the animal may have a genetic disease. Until now scientists have found several those segments, the problem is how many kinds of DNA sequences of a species don't contain those segments. Suppose that DNA sequences of a species is a sequence that consist of A, C, T and G,and the length of sequences is a given integer n. InputFirst line contains two integer m (0
It's well known that DNA Sequence is a sequence only contains A, C, T and G, and it's very useful to analyze a segment of DNA Sequence,For example, if a animal's DNA sequence contains segment ATC then it may mean that the animal may have a genetic disease. Until now scientists have found several those segments, the problem is how many kinds of DNA sequences of a species don't contain those segments. Suppose that DNA sequences of a species is a sequence that consist of A, C, T and G,and the length of sequences is a given integer n. InputFirst line contains two integer m (0<br>
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