Editorial for DMOPC '18 Contest 6 P1 - DNA or RNA?

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Author: AvaLovelace

Firstly, check if the string contains any letter that is not A, C, G, T, or U. If this is true, it is neither DNA nor RNA.

Then, check for the presence of a T and a U in the string. If only T is present, it is DNA. If only U is present, it is RNA. If neither are present, it could be either DNA or RNA. Finally, if both are present, it is neither DNA nor RNA.

Interesting fact: in reality, DNA can contain uracil and RNA can contain thymine on rare occasions.


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