public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int k2 = sc . nextInt ( ) ;
  int k3 = sc . nextInt ( ) ;
  int k5 = sc . nextInt ( ) ;
  int k6 = sc . nextInt ( ) ;
  int a = Math . min ( k2 , ( Math . min ( k5 , k6 ) ) ) ;
  k2 = k2 - a ;
  int b = Math . min ( k2 , k3 ) ;
  long val = 256 * a + 32 * b ;
  System . out . println ( val ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int k2 = sc . nextInt ( ) ; int k3 = sc . nextInt ( ) ; int k5 = sc . nextInt ( ) ; int k6 = sc . nextInt ( ) ; int a = Math . min ( k2 , ( Math . min ( k5 , k6 ) ) ) ; k2 = k2 - a ; int b = Math . min ( k2 , k3 ) ; long val = 256 * a + 32 * b ; System . out . println ( val ) ; }
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