static void findNumbers ( int N ) {
  Vector < Integer > vec = new Vector < Integer > ( ) ;
  for ( int i = 1 ;
  i <= N ;
  i ++ ) {
    if ( isProduct ( i ) && ! isPerfectSquare ( i ) ) {
      vec . add ( i ) ;
    }
  }
  Iterator < Integer > itr = vec . iterator ( ) ;
  while ( itr . hasNext ( ) ) {
    System . out . print ( itr . next ( ) + " " ) ;
  }
}

static void findNumbers ( int N ) { Vector < Integer > vec = new Vector < Integer > ( ) ; for ( int i = 1 ; i <= N ; i ++ ) { if ( isProduct ( i ) && ! isPerfectSquare ( i ) ) { vec . add ( i ) ; } } Iterator < Integer > itr = vec . iterator ( ) ; while ( itr . hasNext ( ) ) { System . out . print ( itr . next ( ) + " ▁ " ) ; } }
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