public static void main ( String [ ] args ) {
  Scanner input = new Scanner ( System . in ) ;
  int r = input . nextInt ( ) ;
  int g = input . nextInt ( ) ;
  int b = input . nextInt ( ) ;
  int [ ] a = new int [ 3 ] ;
  a [ 0 ] = ( r + 1 ) / 2 ;
  a [ 1 ] = ( g + 1 ) / 2 ;
  a [ 2 ] = ( b + 1 ) / 2 ;
  int max = 0 ;
  int index = 0 ;
  for ( int i = 0 ;
  i < 3 ;
  i ++ ) {
    if ( max <= a [ i ] ) {
      max = a [ i ] ;
      index = i ;
    }
  }
  System . out . println ( ( ( max - 1 ) * 3 ) + index + 1 + 29 ) ;
}

public static void main ( String [ ] args ) { Scanner input = new Scanner ( System . in ) ; int r = input . nextInt ( ) ; int g = input . nextInt ( ) ; int b = input . nextInt ( ) ; int [ ] a = new int [ 3 ] ; a [ 0 ] = ( r + 1 ) / 2 ; a [ 1 ] = ( g + 1 ) / 2 ; a [ 2 ] = ( b + 1 ) / 2 ; int max = 0 ; int index = 0 ; for ( int i = 0 ; i < 3 ; i ++ ) { if ( max <= a [ i ] ) { max = a [ i ] ; index = i ; } } System . out . println ( ( ( max - 1 ) * 3 ) + index + 1 + 29 ) ; }
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