#include <iterator>
#include <vector>
#include <iostream>

int main()
{
  int arr[] = { 1, 2, 3, 4, 5 }
  std::vector<double> v(std::begin(arr), std::end(arr));

  std::cout << *begin(v) << '\n';
  std::cout << *prev(end(v)) << '\n';
}