static void pendulumArrangement ( int arr [ ] , int n ) {
  Arrays . sort ( arr ) ;
  int odd , temp , in , pos ;
  pos = n - 1 ;
  if ( n % 2 == 0 ) odd = n - 1 ;
  else odd = n - 2 ;
  while ( odd > 0 ) {
    temp = arr [ odd ] ;
    in = odd ;
    while ( in != pos ) {
      arr [ in ] = arr [ in + 1 ] ;
      in ++ ;
    }
    arr [ in ] = temp ;
    odd = odd - 2 ;
    pos = pos - 1 ;
  }
  int start = 0 , end = ( n - 1 ) / 2 ;
  for ( ;
  start < end ;
  start ++ , end -- ) {
    temp = arr [ start ] ;
    arr [ start ] = arr [ end ] ;
    arr [ end ] = temp ;
  }
  for ( int i = 0 ;
  i < n ;
  i ++ ) System . out . print ( arr [ i ] + " " ) ;
}

static void pendulumArrangement ( int arr [ ] , int n ) { Arrays . sort ( arr ) ; int odd , temp , in , pos ; pos = n - 1 ; if ( n % 2 == 0 ) odd = n - 1 ; else odd = n - 2 ; while ( odd > 0 ) { temp = arr [ odd ] ; in = odd ; while ( in != pos ) { arr [ in ] = arr [ in + 1 ] ; in ++ ; } arr [ in ] = temp ; odd = odd - 2 ; pos = pos - 1 ; } int start = 0 , end = ( n - 1 ) / 2 ; for ( ; start < end ; start ++ , end -- ) { temp = arr [ start ] ; arr [ start ] = arr [ end ] ; arr [ end ] = temp ; } for ( int i = 0 ; i < n ; i ++ ) System . out . print ( arr [ i ] + " ▁ " ) ; }
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