public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  int N = scanner . nextInt ( ) ;
  char [ ] s = scanner . next ( ) . toCharArray ( ) ;
  int left = 0 ;
  int tmp = 0 ;
  for ( char ch : s ) {
    if ( ch == '(' ) tmp -- ;
    else tmp ++ ;
    left = Math . max ( left , tmp ) ;
  }
  int right = 0 ;
  tmp = 0 ;
  for ( int i = N - 1 ;
  i >= 0 ;
  i -- ) {
    char ch = s [ i ] ;
    if ( ch == ')' ) tmp -- ;
    else tmp ++ ;
    right = Math . max ( right , tmp ) ;
  }
  StringBuilder sb = new StringBuilder ( ) ;
  for ( int i = 0 ;
  i < left ;
  i ++ ) sb . append ( '(' ) ;
  sb . append ( s ) ;
  for ( int i = 0 ;
  i < right ;
  i ++ ) sb . append ( ')' ) ;
  System . out . println ( sb . toString ( ) ) ;
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; int N = scanner . nextInt ( ) ; char [ ] s = scanner . next ( ) . toCharArray ( ) ; int left = 0 ; int tmp = 0 ; for ( char ch : s ) { if ( ch == ' ( ' ) tmp -- ; else tmp ++ ; left = Math . max ( left , tmp ) ; } int right = 0 ; tmp = 0 ; for ( int i = N - 1 ; i >= 0 ; i -- ) { char ch = s [ i ] ; if ( ch == ' ) ' ) tmp -- ; else tmp ++ ; right = Math . max ( right , tmp ) ; } StringBuilder sb = new StringBuilder ( ) ; for ( int i = 0 ; i < left ; i ++ ) sb . append ( ' ( ' ) ; sb . append ( s ) ; for ( int i = 0 ; i < right ; i ++ ) sb . append ( ' ) ' ) ; System . out . println ( sb . toString ( ) ) ; }
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