Adding std vectors

std::vector v3(v1);v3.insert(v3.end(), v2.begin(), v2.end());

Thanks, and if I wanted instead to put v2 in the begining of v1 (for example if v1 was (3,4,5) and v2 was (0,1,2) and i wanted v1 to be (0,1,2,3,4,5) )
then would I do:
v1.insert(v1.begin(), v2.begin(), v2.end());
?
Thanks.
EDIT: and i have another question, how do i add something to the begining of a vector (instead of push_back that adds to the end)?
Thanks.

Yes. Although, depending on the relative sizes of v1 and v2, it might be better to append v1 to v2 and then swap them (that is, if you don't care about what becomes of v2).

If you need to do this operation often, you might want to look at std::list.