#include <iostream>
 
// declare things first
template< typename T > class array ;
 
template< typename T >
std::istream& operator>> ( std::istream& din, array<T>& b ) ;
 
template< typename T >
std::ostream& operator<< ( std::ostream &dout, const array<T> &b) ;
 
// define them now
template< typename T > class array
{
  T a[10] ;  // concept: T is default_constructible
  int n ;
 
  // <> tells the compiler that the friend is a template.
  // http://www.parashift.com/c++-faq-lite/templates.html#faq-35.16
  friend std::istream& operator>> <> ( std::istream&, array<T>& ) ;
  friend std::ostream& operator<< <> ( std::ostream&,
                                       const array<T>& ) ;
  //...
};
 
template< typename T >
std::istream& operator>> ( std::istream& din, array<T>& b )
{
  din >> b.n ; // what happens if the user enters a value > 10 ?
  for( int i=0; i<b.n; ++i ) din >> b.a[i] ;
  return din ;
}
 
template< typename T >
std::ostream& operator<< ( std::ostream &dout, const array<T> &b)
{
  dout << b.n << '\n' ;
  for( int i=0 ; i<b.n ; i++) dout<<b.a[i] << " " ;
  return dout << '\n' ;
}
 
int main()
{
  array<int> iarray ;
  std::cin >> iarray ;
  std::cout << iarray ;
}