public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int n = sc . nextInt ( ) ;
  int [ ] a = new int [ n ] ;
  int sum = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    a [ i ] = Integer . parseInt ( sc . next ( ) ) ;
    sum += a [ i ] ;
  }
  int len = 4000001 ;
  BitSet bs = new BitSet ( len ) ;
  bs . set ( len ) ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    BitSet shift = bs . get ( a [ i ] , len + 1 ) ;
    bs . or ( shift ) ;
  }
  for ( int i = len - ( sum + 1 ) / 2 ;
  i > 0 ;
  i -- ) {
    if ( bs . get ( i ) ) {
      System . out . println ( len - i ) ;
      break ;
    }
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int n = sc . nextInt ( ) ; int [ ] a = new int [ n ] ; int sum = 0 ; for ( int i = 0 ; i < n ; i ++ ) { a [ i ] = Integer . parseInt ( sc . next ( ) ) ; sum += a [ i ] ; } int len = 4000001 ; BitSet bs = new BitSet ( len ) ; bs . set ( len ) ; for ( int i = 0 ; i < n ; i ++ ) { BitSet shift = bs . get ( a [ i ] , len + 1 ) ; bs . or ( shift ) ; } for ( int i = len - ( sum + 1 ) / 2 ; i > 0 ; i -- ) { if ( bs . get ( i ) ) { System . out . println ( len - i ) ; break ; } } }
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