#include <ospace/stl.h>
#include <iostream.h>

int main ()
{
  vector <int> v (5);
  for (int i = 0; i < v.size (); i++)
    v[i] = i + 1;
  int sum = accumulate (v.begin (), v.end (), 0);
  cout << "sum = " << sum << endl;
  return 0;
}