static int findSextuplets ( int [ ] arr , int n ) {
  int index = 0 ;
  int [ ] RHS = new int [ n * n * n + 1 ] ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    if ( arr [ i ] != 0 ) {
      for ( int j = 0 ;
      j < n ;
      j ++ ) {
        for ( int k = 0 ;
        k < n ;
        k ++ ) {
          RHS [ index ++ ] = arr [ i ] * ( arr [ j ] + arr [ k ] ) ;
        }
      }
    }
  }
  Arrays . sort ( RHS ) ;
  int result = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    for ( int j = 0 ;
    j < n ;
    j ++ ) {
      for ( int k = 0 ;
      k < n ;
      k ++ ) {
        int val = arr [ i ] * arr [ j ] + arr [ k ] ;
        result += ( upper_bound ( RHS , index , val ) - lower_bound ( RHS , index , val ) ) ;
      }
    }
  }
  return result ;
}

static int findSextuplets ( int [ ] arr , int n ) { int index = 0 ; int [ ] RHS = new int [ n * n * n + 1 ] ; for ( int i = 0 ; i < n ; i ++ ) { if ( arr [ i ] != 0 ) { for ( int j = 0 ; j < n ; j ++ ) { for ( int k = 0 ; k < n ; k ++ ) { RHS [ index ++ ] = arr [ i ] * ( arr [ j ] + arr [ k ] ) ; } } } } Arrays . sort ( RHS ) ; int result = 0 ; for ( int i = 0 ; i < n ; i ++ ) { for ( int j = 0 ; j < n ; j ++ ) { for ( int k = 0 ; k < n ; k ++ ) { int val = arr [ i ] * arr [ j ] + arr [ k ] ; result += ( upper_bound ( RHS , index , val ) - lower_bound ( RHS , index , val ) ) ; } } } return result ; }
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