#include <iostream>

using namespace std;

int nums[] = { 1, 5, 12, 19, 33, 42, 55, 58, 61, 63 };

const int N = sizeof(nums) / sizeof(int);

void swap(int & a, int & b)  // ampersands mean reference parameters
{ int temp = a;
  a = b;
  b = temp; }

int main()
{
  // print the array
  for (int i = 0; i < N; i += 1)
    cout << nums[i] << " ";
  cout << "\n";

  // reverse the array
  for (int i = 0, j = N-1; j > i; i += 1, j -= 1)
    swap(nums[i], nums[j]);

  // print the array
  for (int i = 0; i < N; i += 1)
    cout << nums[i] << " ";
  cout << "\n";
}