#include <iostream>
#include <vector>
#define SIZE 10

using namespace std;

int main() {
  vector<int> ints(SIZE);
  for(int i=0; i<SIZE; i++)
    ints[i] = i+1;
  
  vector<int>::const_iterator it = ints.cend(); // starting past the end of the container
  while(it > ints.cbegin()) {
    it -= 2;                              // move back by 2 elements
    cout << *it << " ";
    if(it <= ints.cbegin())              // stop when we reach or we have passed the first element
      break;
  }
  cout << endl;
}