#include <vector>

int main(int argc, char *argv[]) {
   vector<int> a;
   a.push_back(1);
   a.push_back(2);
   a.push_back(6);
   for(unsigned int i = 0; i < a.size(); i++)
      printf("%i: %i\n", i, a.at(i));
   return 0;
}