adding to vector of vector<int>, check if element already present

[LMHmedchem]

Use std::find_if(), not std::find().

Then you check the return iterator is equal to check_path.end(). If it is, then the item was not found.

Regards,

Paul McKenzie

Find_if returns an iterator to an element if that element returns as true from some second function, right? That second function would have to test equality against the elements in the vector being checked, but I'm not sure what that would look like.

LMHmedchem