public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  int n2 = scanner . nextInt ( ) ;
  int n3 = scanner . nextInt ( ) ;
  int n5 = scanner . nextInt ( ) ;
  int n6 = scanner . nextInt ( ) ;
  int n256 = Math . min ( Math . min ( n2 , n5 ) , n6 ) ;
  n2 -= n256 ;
  n5 -= n256 ;
  n6 -= n256 ;
  int n32 = Math . min ( n2 , n3 ) ;
  System . out . println ( 256 * n256 + 32 * n32 ) ;
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; int n2 = scanner . nextInt ( ) ; int n3 = scanner . nextInt ( ) ; int n5 = scanner . nextInt ( ) ; int n6 = scanner . nextInt ( ) ; int n256 = Math . min ( Math . min ( n2 , n5 ) , n6 ) ; n2 -= n256 ; n5 -= n256 ; n6 -= n256 ; int n32 = Math . min ( n2 , n3 ) ; System . out . println ( 256 * n256 + 32 * n32 ) ; }
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