Мутация

In english description said that: "An organism is considered ideal if any two identical genes are either located in adjacent positions in the genome, or there is at least one between them".

Problem description don't mention which type of gene should be between two identical genes.

However in russian description it is said that: "An organism is considered ideal if any two identical genes are either located in adjacent positions in the genome, or there is at least one between them which is same gen as those two"