static void printKPFNums ( int A , int B , int K ) {
  boolean prime [ ] = new boolean [ B + 1 ] ;
  Arrays . fill ( prime , true ) ;
  int p_factors [ ] = new int [ B + 1 ] ;
  Arrays . fill ( p_factors , 0 ) ;
  for ( int p = 2 ;
  p <= B ;
  p ++ ) if ( p_factors [ p ] == 0 ) for ( int i = p ;
  i <= B ;
  i += p ) p_factors [ i ] ++ ;
  for ( int i = A ;
  i <= B ;
  i ++ ) if ( p_factors [ i ] == K ) System . out . print ( i + " " ) ;
}

static void printKPFNums ( int A , int B , int K ) { boolean prime [ ] = new boolean [ B + 1 ] ; Arrays . fill ( prime , true ) ; int p_factors [ ] = new int [ B + 1 ] ; Arrays . fill ( p_factors , 0 ) ; for ( int p = 2 ; p <= B ; p ++ ) if ( p_factors [ p ] == 0 ) for ( int i = p ; i <= B ; i += p ) p_factors [ i ] ++ ; for ( int i = A ; i <= B ; i ++ ) if ( p_factors [ i ] == K ) System . out . print ( i + " ▁ " ) ; }
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