// Program to read in integers and print in two columns.
//
// Input:  sequence of N integers read from standard input.
// Output:  input sequence of integers printed to standard output in
//            two-column format, with first column containing first 
//            (N+1)/2 numbers and second column containing remaining 
//            numbers.
//
// This version does not use the STL, but uses a fixed-size array.


#include <iostream.h>
#include <stdlib.h>		// has EXIT_SUCCESS

typedef unsigned int v_size_t;

int main(void)
{
  // vector<int> v;
  const v_size_t maxSize = 10;	// maximum size of v
  v_size_t size = 0;		// size of v
  int v[maxSize];

  cout << "Enter some integers, control-D to end:\n";
  while (size < maxSize && cin >> v[size]) {
    ++size;
    //v.push_back(temp);
  }
  int temp;
  if (cin >> temp) {
    cout << "You have exceeded this program's capacity!\n";
    exit(EXIT_FAILURE);
  }
      
  // v_size_t size = v.size();
  for (v_size_t i = 0; i < size/2; ++i)
    cout << v[i] << "\t" << v[i + (size+1)/2] << endl;

  if (size % 2 != 0)
    cout << v[size/2] << endl;

  return EXIT_SUCCESS;
}