public static void main ( String [ ] args ) {
  FS in = new FS ( ) ;
  long R = in . nextLong ( ) ;
  long C = in . nextLong ( ) ;
  long res = solve ( Math . min ( R , C ) , Math . max ( R , C ) ) ;
  out . println ( res ) ;
  out . close ( ) ;
}

public static void main ( String [ ] args ) { FS in = new FS ( ) ; long R = in . nextLong ( ) ; long C = in . nextLong ( ) ; long res = solve ( Math . min ( R , C ) , Math . max ( R , C ) ) ; out . println ( res ) ; out . close ( ) ; }
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