int main()
{
    vector<pair<double ,double> > vec_pairs;

 for(vector<unsigned int>::size_type j = 0; j != vec_pairs.size(); j++ )
        {
            if(vec_pairs[j].first==12.6)
            {
              int z=7;
              continue;
            }
        }
  cout<< "PAssed!";
}

PAssed!