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#include 
#include 
#include 
using namespace std;

  int a[] = { 1, 10, 3, 42 };

  int b[] = { 1, 10, 42, 3 };

  int c[] = { 1, 10, 3 };

int main(  )

{

  cout<<"a: ";
  copy(a,a+4,ostream_iterator(cout," "));
  cout<(cout," "));
  cout<(cout," "));
  cout<