public static void main ( String [ ] args ) throws IOException {
  Scanner sc = new Scanner ( System . in ) ;
  PrintWriter out = new PrintWriter ( System . out ) ;
  int a = sc . nextInt ( ) * 2 , b = sc . nextInt ( ) * 2 , x1 = sc . nextInt ( ) , y1 = sc . nextInt ( ) , x2 = sc . nextInt ( ) , y2 = sc . nextInt ( ) ;
  int d1 = Math . abs ( Math . floorDiv ( x1 - y1 , b ) - Math . floorDiv ( x2 - y2 , b ) ) ;
  int d2 = Math . abs ( Math . floorDiv ( x1 + y1 , a ) - Math . floorDiv ( x2 + y2 , a ) ) ;
  out . println ( Math . max ( d1 , d2 ) ) ;
  out . close ( ) ;
}

public static void main ( String [ ] args ) throws IOException { Scanner sc = new Scanner ( System . in ) ; PrintWriter out = new PrintWriter ( System . out ) ; int a = sc . nextInt ( ) * 2 , b = sc . nextInt ( ) * 2 , x1 = sc . nextInt ( ) , y1 = sc . nextInt ( ) , x2 = sc . nextInt ( ) , y2 = sc . nextInt ( ) ; int d1 = Math . abs ( Math . floorDiv ( x1 - y1 , b ) - Math . floorDiv ( x2 - y2 , b ) ) ; int d2 = Math . abs ( Math . floorDiv ( x1 + y1 , a ) - Math . floorDiv ( x2 + y2 , a ) ) ; out . println ( Math . max ( d1 , d2 ) ) ; out . close ( ) ; }
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