public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  double A = sc . nextInt ( ) ;
  double B = sc . nextInt ( ) ;
  double b = B ;
  int count = 0 ;
  for ( int i = 0 ;
  i < 4 ;
  i ++ ) {
    double c = B % 10 ;
    B = B / 10 ;
    if ( c == 0 ) {
      count ++ ;
    }
    else if ( c >= 1 ) {
      count ++ ;
    }
    else {
      break ;
    }
  }
  double a = Math . pow ( 10 , count ) ;
  double ans = a * A + b ;
  System . out . println ( String . format ( "%.0f" , ans * 2 ) ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; double A = sc . nextInt ( ) ; double B = sc . nextInt ( ) ; double b = B ; int count = 0 ; for ( int i = 0 ; i < 4 ; i ++ ) { double c = B % 10 ; B = B / 10 ; if ( c == 0 ) { count ++ ; } else if ( c >= 1 ) { count ++ ; } else { break ; } } double a = Math . pow ( 10 , count ) ; double ans = a * A + b ; System . out . println ( String . format ( " % .0f " , ans * 2 ) ) ; }
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