public static void main ( String [ ] args ) {
  Scanner s = new Scanner ( System . in ) ;
  int r = s . nextInt ( ) ;
  int g = s . nextInt ( ) ;
  int b = s . nextInt ( ) ;
  int t = 29 ;
  int check = 0 ;
  while ( check == 0 ) {
    if ( r <= 0 && g <= 0 && b <= 0 ) {
      check = 1 ;
    }
    if ( check == 0 ) {
      r -= 2 ;
      t ++ ;
    }
    if ( r <= 0 && g <= 0 && b <= 0 ) {
      check = 1 ;
    }
    if ( check == 0 ) {
      g -= 2 ;
      t ++ ;
    }
    if ( r <= 0 && g <= 0 && b <= 0 ) {
      check = 1 ;
    }
    if ( check == 0 ) {
      b -= 2 ;
      t ++ ;
    }
  }
  System . out . println ( t ) ;
}

public static void main ( String [ ] args ) { Scanner s = new Scanner ( System . in ) ; int r = s . nextInt ( ) ; int g = s . nextInt ( ) ; int b = s . nextInt ( ) ; int t = 29 ; int check = 0 ; while ( check == 0 ) { if ( r <= 0 && g <= 0 && b <= 0 ) { check = 1 ; } if ( check == 0 ) { r -= 2 ; t ++ ; } if ( r <= 0 && g <= 0 && b <= 0 ) { check = 1 ; } if ( check == 0 ) { g -= 2 ; t ++ ; } if ( r <= 0 && g <= 0 && b <= 0 ) { check = 1 ; } if ( check == 0 ) { b -= 2 ; t ++ ; } } System . out . println ( t ) ; }
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