#include <iostream>
#include <vector>
#include <list>
#include <algorithm>
#include <numeric>
using namespace std;
vector<int> fill (int from, int to)
{ vector<int> local;
  for(int i=from; i<=to; i++)
   local.push_back(i);
  return local; }
int main(void)
{ vector<int> shine;
  shine = fill(3,6);
  cout << shine.size() << endl; //LINE C

  vector<int> moon;
  moon = fill(2,5);
  cout << accumulate(moon.begin(), moon.end(), 0) << endl; //LINE D

  list<int> eclipse;
  list<int>::reverse_iterator rev;
  eclipse.push_back(1);
  eclipse.push_front(2);
  eclipse.push_back(3);
  eclipse.push_front(4);
  for(rev=eclipse.rbegin();
      rev!=eclipse.rend();
      ++rev)                  //
    cout << *rev << ' ';      // LINE E
    cout << endl;             //
}