#include "iostream"
#include "string"
#include "sstream"
#include "vector"
using namespace std;

#define all(v) (v).begin(), (v).end()
#define all_array(v, n) array_begin(v, n), array_end(v, n)

template <class T>
T* array_begin(T* ptr, int n) {
  return ptr;
}
template <class T>
const T* array_begin(const T* ptr, int n) {
  return ptr;
}

template <class T>
T* array_end(T* ptr, int n) {
  return ptr + n;
}
template <class T>
const T* array_end(const T* ptr, int n) {
  return ptr + n;
}

template <class Iterator, class OutputStream>
OutputStream& dump(Iterator begin, Iterator end, OutputStream& oss, string sep = " ") {
  if (begin != end) {
    oss << *begin++;
    for (; begin != end; ++begin)
      oss << sep << *begin;
  }
  return oss;
}

int main (int argc, char const* argv[]) {
  int numbers[] = {21, 9, 1985};
  vector<int> vi(5, 0);
  for(int i = 0; i < (int)vi.size(); i++) vi[i] = i;
  dump(all_array(numbers, sizeof(numbers) / sizeof(numbers[0])), cout, ", ") << endl;
  dump(all(vi), cout, ", ") << endl;
  return 0;
}