Vector Vector::operator*(const mat_vec::Matrix &mat) const {
    size_t size = min(mat.shape().first,this->size());
    Vector tmp(mat.shape().second);
    for (size_t i = 0;i < mat.shape().second;++i) {
        for (size_t j = 0;j < size;++j) {
            tmp[i] += this->vecData[j]*mat.get(j,i);
        }
    }
    return tmp;
}

Vector& Vector::operator*=(const mat_vec::Matrix &mat) {
    Vector tmp = *this * mat;
    *this = tmp;
    return *this;
}