How do you specialise a templated function with a templated class?

So i have a templated function:

template<typename T>
int func(const T& input){
  //do stuff
}

And I'd like to specialise it with a templated class(like std::vector) So like this:

template<typename T>
int func(const std::vector<T>& input){
  //do specialised stuff
}

But I don't know how exactly you do it. Thanks!