How to pass a vector into a function and initialize it in the pass field?

I need to pass a vector into a constructor, but the vector is initialized in the constructor, and when I accept a vector, I am getting an error that says no matching constructor for initialization. How would I edit the constructor to accept this?

class Polynomial {

public:
    Polynomial(const vector<int>& vec) {
//Stuff 
};

int main() {
   Polynomial p1({17});
   Polynomial p2({5, 4, 3, 2, 1});
}