public static void main ( String [ ] args ) {
  Scanner stdin = new Scanner ( System . in ) ;
  String x ;
  int i = 0 , j = 0 ;
  int a = stdin . nextInt ( ) ;
  x = stdin . next ( ) ;
  for ( int k = 1 ;
  k <= x . length ( ) ;
  k ++ ) {
    String xx = x . substring ( k - 1 , k ) ;
    if ( xx . equals ( "(" ) ) {
      i ++ ;
    }
    else {
      i -- ;
    }
    if ( i < 0 ) {
      j ++ ;
      i = 0 ;
    }
  }
  for ( int f = 0 ;
  f < j ;
  f ++ ) System . out . print ( "(" ) ;
  System . out . print ( x ) ;
  for ( int f = 0 ;
  f < i ;
  f ++ ) System . out . print ( ")" ) ;
}

public static void main ( String [ ] args ) { Scanner stdin = new Scanner ( System . in ) ; String x ; int i = 0 , j = 0 ; int a = stdin . nextInt ( ) ; x = stdin . next ( ) ; for ( int k = 1 ; k <= x . length ( ) ; k ++ ) { String xx = x . substring ( k - 1 , k ) ; if ( xx . equals ( " ( " ) ) { i ++ ; } else { i -- ; } if ( i < 0 ) { j ++ ; i = 0 ; } } for ( int f = 0 ; f < j ; f ++ ) System . out . print ( " ( " ) ; System . out . print ( x ) ; for ( int f = 0 ; f < i ; f ++ ) System . out . print ( " ) " ) ; }
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